/**CFile****************************************************************

  FileName    [abc.c]

  SystemName  [ABC: Logic synthesis and verification system.]

  PackageName [Network and node package.]

  Synopsis    [Command file.]

  Author      [Alan Mishchenko]

  Affiliation [UC Berkeley]

  Date        [Ver. 1.0. Started - June 20, 2005.]

  Revision    [$Id: abc.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]

***********************************************************************/

#include "base/abc/abc.h"
#include "base/main/main.h"
#include "base/main/mainInt.h"
#include "proof/fraig/fraig.h"
#include "opt/fxu/fxu.h"
#include "opt/fxch/Fxch.h"
#include "opt/cut/cut.h"
#include "map/fpga/fpga.h"
#include "map/if/if.h"
#include "opt/sim/sim.h"
#include "opt/res/res.h"
#include "opt/lpk/lpk.h"
#include "aig/gia/giaAig.h"
#include "opt/dar/dar.h"
#include "opt/mfs/mfs.h"
#include "proof/fra/fra.h"
#include "aig/saig/saig.h"
#include "proof/int/int.h"
#include "proof/dch/dch.h"
#include "proof/ssw/ssw.h"
#include "opt/cgt/cgt.h"
#include "bool/kit/kit.h"
#include "map/amap/amap.h"
#include "opt/ret/retInt.h"
#include "sat/xsat/xsat.h"
#include "sat/satoko/satoko.h"
#include "sat/cnf/cnf.h"
#include "proof/cec/cec.h"
#include "proof/acec/acec.h"
#include "proof/pdr/pdr.h"
#include "misc/tim/tim.h"
#include "bdd/llb/llb.h"
#include "bdd/bbr/bbr.h"
#include "map/cov/cov.h"
#include "base/cmd/cmd.h"
#include "proof/abs/abs.h"
#include "sat/bmc/bmc.h"
#include "proof/ssc/ssc.h"
#include "opt/sfm/sfm.h"
#include "opt/sbd/sbd.h"
#include "bool/rpo/rpo.h"
#include "map/mpm/mpm.h"
#include "opt/fret/fretime.h"
#include "opt/nwk/nwkMerge.h"
#include "base/acb/acbPar.h"
#include "misc/extra/extra.h"


#ifndef _WIN32
#include <unistd.h>
#endif

ABC_NAMESPACE_IMPL_START

////////////////////////////////////////////////////////////////////////
///                        DECLARATIONS                              ///
////////////////////////////////////////////////////////////////////////

//#define USE_MINISAT22

static int Abc_CommandPrintStats             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintExdc              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintIo                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintLatch             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintFanio             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintMffc              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintFactor            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintLevel             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintSupport           ( Abc_Frame_t * pAbc, int argc, char ** argv );
#ifdef ABC_USE_CUDD
static int Abc_CommandPrintMint              ( Abc_Frame_t * pAbc, int argc, char ** argv );
#endif
static int Abc_CommandPrintSymms             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintUnate             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintAuto              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintKMap              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintGates             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintSharing           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintXCut              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintDsd               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintCone              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintMiter             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintStatus            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPrintDelay             ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandShow                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandShowBdd                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandShowCut                ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandCollapse               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSatClp                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandStrash                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBalance                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMuxStruct              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMulti                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRenode                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCleanup                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSweep                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFastExtract            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFxch                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandEliminate              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDisjoint               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSparsify               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandLutpack                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandLutmin                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandImfs                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMfs                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMfs2                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMfs3                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMfse                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandLogicPush              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTrace                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandGlitch                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSpeedup                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPowerdown              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAddBuffs               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMerge                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestDec                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestNpn                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestRPO                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestTruth              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRunEco                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRunGen                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRunTest                ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandRewrite                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRefactor               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRestructure            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandResubstitute           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandResubCheck             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRr                     ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCascade                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExtract                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandVarMin                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFaultClasses           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExact                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBmsStart               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBmsStop                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBmsPs                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMajExact               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTwoExact               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandLutExact               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAllExact               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestExact              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMajGen                 ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandLogic                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandComb                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMiter                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMiter2                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDemiter                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandOrPos                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAndPos                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandZeroPo                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSwapPos                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRemovePo               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDropSat                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAddPi                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAppend                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPutOnTop               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFrames                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDFrames                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSop                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBdd                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAig                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandReorder                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBidec                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandOrder                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMuxes                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCubes                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExpand                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSplitSop               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExtSeqDcs              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandReach                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCone                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandNode                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRange                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCof                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTopmost                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBottommost             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTopAnd                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTrim                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandShortNames             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMoveNames              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExdcFree               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExdcGet                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExdcSet                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCareSet                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCut                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandEspresso               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandGen                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandGenFsm                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCover                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDouble                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandInter                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBb2Wb                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandOutdec                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandNodeDup                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestColor              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTest                   ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandQuaVar                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandQuaRel                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandQuaReach               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSenseInput             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandNpnLoad                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandNpnSave                ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandSendAig                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSendStatus             ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandBackup                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRestore                ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandMinisat                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMinisimp               ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandIStrash                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandICut                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIRewrite               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDRewrite               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDRefactor              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDc2                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDChoice                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDch                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDrwsat                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIRewriteSeq            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIResyn                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandISat                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIFraig                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDFraig                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCSweep                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDProve                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbSec                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSimSec                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMatch                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandHaig                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandQbf                    ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandFraig                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFraigTrust             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFraigStore             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFraigRestore           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFraigClean             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFraigSweep             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFraigDress             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDumpEquiv              ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandRecStart3              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecStop3               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecPs3                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecAdd3                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecDump3               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecMerge3              ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandMap                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAmap                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPhaseMap               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandUnmap                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAttach                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSuperChoice            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSuperChoiceLut         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTimeScale              ( Abc_Frame_t * pAbc, int argc, char ** argv );

//static int Abc_CommandFpga                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandFpgaFast               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIf                     ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIfif                   ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandDsdSave                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDsdLoad                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDsdFree                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDsdPs                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDsdMatch               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDsdMerge               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDsdFilter              ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandScut                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandInit                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandZero                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandUndc                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandOneHot                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPipe                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSeq                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandUnseq                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRetime                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDRetime                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFlowRetime             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCRetime                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSeqFpga                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSeqMap                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSeqSweep               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSeqSweep2              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestSeqSweep           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestScorr              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandLcorr                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSeqCleanup             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCycle                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandXsim                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSim                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSim3                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDarPhase               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSynch                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandClockGate              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExtWin                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandInsWin                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSymFun                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPermute                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandUnpermute              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCubeEnum               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPathEnum               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFunEnum                ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandCec                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDCec                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDSec                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSat                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDSat                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandXSat                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSatoko                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Satoko             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sat3               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Kissat             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPSat                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandProve                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIProve                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDebug                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandEco                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBmc                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBmc2                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBmc3                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBmcInter               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIndcut                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandEnlarge                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTempor                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandInduction              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandConstr                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandUnfold                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFold                   ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandUnfold2                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFold2                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBm                     ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBm2                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSaucy                  ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTestCex                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandPdr                    ( Abc_Frame_t * pAbc, int argc, char ** argv );
#ifdef ABC_USE_CUDD
static int Abc_CommandReconcile              ( Abc_Frame_t * pAbc, int argc, char ** argv );
#endif
static int Abc_CommandCexSave                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCexLoad                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCexCut                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCexMerge               ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandCexMin                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDualRail               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandBlockPo                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandIso                    ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandTraceStart             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandTraceCheck             ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandAbcSave                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbcLoad                ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandAbc9Get                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Put                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MoveNames          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Save               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Save2              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SaveAig            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Load               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Load2              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9LoadAig            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Read               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReadBlif           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReadCBlif          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReadStg            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReadVer            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9WriteVer           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Write              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9WriteLut           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Ps                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9PFan               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9PSig               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Status             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MuxProfile         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MuxPos             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MuxStr             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MuxDec             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9PrintTruth         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Unate              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Rex2Gia            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9RexWalk            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Show               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SetRegNum          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Strash             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Topand             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Add1Hot            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Cof                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Trim               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Dfs                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sim                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sim2               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sim3               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MLGen              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MLTest             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Iwls21Test         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReadSim            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9WriteSim           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9PrintSim           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9GenSim             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SimRsb             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Resim              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SpecI              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Equiv              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Equiv2             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Equiv3             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Semi               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Times              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Frames             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Retime             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Enable             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Dc2                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Dsd                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Bidec              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Shrink             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Fx                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Extract            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Balance            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9BalanceLut         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Resub              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Reshape            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Syn2               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Syn3               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Syn4               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Synch2             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9False              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Miter              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Miter2             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Append             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Scl                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Lcorr              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Scorr              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Choice             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sat                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatEnum            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Fraig              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9CFraig             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Srm                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Srm2               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Filter             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Reduce             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9EquivMark          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9EquivFilter        ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Cec                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ICec               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Verify             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sweep              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Force              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Embed              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sopb               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Dsdb               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Flow               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Flow2              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Flow3              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9If                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Iff                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Iiff               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9If2                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Sif                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Jf                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Kf                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Lf                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Mf                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Nf                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Of                 ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Pack               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Edge               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatLut             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9LNetRead           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9LNetSim            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9LNetEval           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9LNetOpt            ( Abc_Frame_t * pAbc, int argc, char ** argv );
//#ifndef _WIN32
static int Abc_CommandAbc9Ttopt              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Transduction       ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9TranStoch          ( Abc_Frame_t * pAbc, int argc, char ** argv );
//#endif
static int Abc_CommandAbc9LNetMap            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Unmap              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Struct             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Trace              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Speedup            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Era                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Dch                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Rpm                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9BackReach          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Posplit            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Permute            ( Abc_Frame_t * pAbc, int argc, char ** argv );
#ifdef ABC_USE_CUDD
static int Abc_CommandAbc9ReachM             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReachP             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReachN             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReachY             ( Abc_Frame_t * pAbc, int argc, char ** argv );
#endif
static int Abc_CommandAbc9Undo               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Mesh               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Iso                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9IsoNpn             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9IsoSt              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Compare            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9RevEng             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Uif                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9CexInfo            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Cycle              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Cone               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Slice              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9PoPart             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9GroupProve         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MultiProve         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SplitProve         ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Bmc                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SBmc               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ChainBmc           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9BCore              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ICheck             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatTest            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9FFTest             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Qbf                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9QVar               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9GenQbf             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9HomoQbf            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatFx              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatClp             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Inse               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Maxi               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Bmci               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9PoXsim             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Demiter            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Fadds              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ATree              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Polyn              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Acec               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Anorm              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Decla              ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Esop               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Exorcism           ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Mfs                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Mfsd               ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9DeepSyn            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatSyn             ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9StochSyn           ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandAbc9PoPart2            ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandAbc9CexCut             ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandAbc9CexMerge           ( Abc_Frame_t * pAbc, int argc, char ** argv );
//static int Abc_CommandAbc9CexMin             ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandAbc9AbsCreate          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9AbsDerive          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9AbsRefine          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9GlaDerive          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9GlaRefine          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9GlaShrink          ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Gla                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Vta                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Vta2Gla            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Gla2Vta            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Fla2Gla            ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Gla2Fla            ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandAbc9Gen                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Cfs                ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ProdAdd            ( Abc_Frame_t * pAbc, int argc, char ** argv );

static int Abc_CommandAbc9Test               ( Abc_Frame_t * pAbc, int argc, char ** argv );

extern int Abc_CommandAbcLivenessToSafety    ( Abc_Frame_t * pAbc, int argc, char ** argv );
extern int Abc_CommandAbcLivenessToSafetySim ( Abc_Frame_t * pAbc, int argc, char ** argv );
extern int Abc_CommandAbcLivenessToSafetyWithLTL( Abc_Frame_t * pAbc, int argc, char ** argv );
extern int Abc_CommandCS_kLiveness           ( Abc_Frame_t * pAbc, int argc, char ** argv );
extern int Abc_CommandNChooseK               ( Abc_Frame_t * pAbc, int argc, char ** argv );

extern Aig_Man_t * Abc_NtkToDar( Abc_Ntk_t * pNtk, int fExors, int fRegisters );
extern Abc_Ntk_t * Abc_NtkFromAigPhase( Aig_Man_t * pMan );

extern Vec_Ptr_t * Abc_NtkCollectCiNames( Abc_Ntk_t * pNtk );
extern Vec_Ptr_t * Abc_NtkCollectCoNames( Abc_Ntk_t * pNtk );

extern void Extra_BitMatrixTransposeP( Vec_Wrd_t * vSimsIn, int nWordsIn, Vec_Wrd_t * vSimsOut, int nWordsOut );

////////////////////////////////////////////////////////////////////////
///                     FUNCTION DEFINITIONS                         ///
////////////////////////////////////////////////////////////////////////

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_FrameReplaceCex( Abc_Frame_t * pAbc, Abc_Cex_t ** ppCex )
{
    // update CEX
    ABC_FREE( pAbc->pCex );
    pAbc->pCex = *ppCex;
    *ppCex = NULL;
    // remove CEX vector
    if ( pAbc->vCexVec )
    {
        Vec_PtrFreeFree( pAbc->vCexVec );
        pAbc->vCexVec = NULL;
    }
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_FrameReplaceCexVec( Abc_Frame_t * pAbc, Vec_Ptr_t ** pvCexVec )
{
    // update CEX vector
    if ( pAbc->vCexVec )
        Vec_PtrFreeFree( pAbc->vCexVec );
    pAbc->vCexVec = *pvCexVec;
    *pvCexVec = NULL;
    // remove CEX
    ABC_FREE( pAbc->pCex );
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_FrameReplacePoEquivs( Abc_Frame_t * pAbc, Vec_Ptr_t ** pvPoEquivs )
{
    if ( pAbc->vPoEquivs )
        Vec_VecFree( (Vec_Vec_t *)pAbc->vPoEquivs );
    pAbc->vPoEquivs = *pvPoEquivs;
    *pvPoEquivs = NULL;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_FrameReplacePoStatuses( Abc_Frame_t * pAbc, Vec_Int_t ** pvStatuses )
{
    if ( pAbc->vStatuses )
        Vec_IntFree( pAbc->vStatuses );
    pAbc->vStatuses = *pvStatuses;
    *pvStatuses = NULL;
}

/**Function*************************************************************

  Synopsis    [Derives array of statuses from the array of CEXes.]

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
Vec_Int_t * Abc_FrameDeriveStatusArray( Vec_Ptr_t * vCexes )
{
    Vec_Int_t * vStatuses;
    Abc_Cex_t * pCex;
    int i;
    if ( vCexes == NULL )
        return NULL;
    vStatuses = Vec_IntAlloc( Vec_PtrSize(vCexes) );
    Vec_IntFill( vStatuses, Vec_PtrSize(vCexes), -1 ); // assume UNDEC
    Vec_PtrForEachEntry( Abc_Cex_t *, vCexes, pCex, i )
        if ( pCex != NULL )
            Vec_IntWriteEntry( vStatuses, i, 0 ); // set this output as SAT
    return vStatuses;
}
Vec_Int_t * Abc_FrameDeriveStatusArray2( Vec_Ptr_t * vCexes )
{
    Vec_Int_t * vStatuses;
    Abc_Cex_t * pCex;
    int i;
    if ( vCexes == NULL )
        return NULL;
    vStatuses = Vec_IntAlloc( Vec_PtrSize(vCexes) );
    Vec_IntFill( vStatuses, Vec_PtrSize(vCexes), -1 ); // assume UNDEC
    Vec_PtrForEachEntry( Abc_Cex_t *, vCexes, pCex, i )
        if ( pCex == (Abc_Cex_t *)(ABC_PTRINT_T)1 )
        {
            Vec_IntWriteEntry( vStatuses, i, 1 ); // set this output as UNSAT
            Vec_PtrWriteEntry( vCexes, i, NULL );
        }
        else if ( pCex != NULL )
            Vec_IntWriteEntry( vStatuses, i, 0 ); // set this output as SAT
    return vStatuses;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_FrameClearDesign()
{
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_FrameUpdateGia( Abc_Frame_t * pAbc, Gia_Man_t * pNew )
{
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_FrameUpdateGia(): Tranformation has failed.\n" );
        return;
    }
    if ( Gia_ManPoNum(pNew) == 0 )
        Abc_Print( 0, "The current GIA has no primary outputs. Some commands may not work correctly.\n" );
    if ( pNew == pAbc->pGia )
        return;
    // transfer names
    if (!pNew->vNamesIn && pAbc->pGia && pAbc->pGia->vNamesIn && Gia_ManCiNum(pNew) == Vec_PtrSize(pAbc->pGia->vNamesIn))
    {
        pNew->vNamesIn = pAbc->pGia->vNamesIn;
        pAbc->pGia->vNamesIn = NULL;
    }
    if (!pNew->vNamesOut && pAbc->pGia && pAbc->pGia->vNamesOut && Gia_ManCoNum(pNew) == Vec_PtrSize(pAbc->pGia->vNamesOut))
    {
        pNew->vNamesOut = pAbc->pGia->vNamesOut;
        pAbc->pGia->vNamesOut = NULL;
    }
    if (!pNew->vNamesNode && pAbc->pGia && pAbc->pGia->vNamesNode && Gia_ManObjNum(pNew) == Vec_PtrSize(pAbc->pGia->vNamesNode))
    {
        pNew->vNamesNode = pAbc->pGia->vNamesNode;
        pAbc->pGia->vNamesNode = NULL;
    }
    // update
    if ( pAbc->pGia2 )
        Gia_ManStop( pAbc->pGia2 );
    pAbc->pGia2 = pAbc->pGia;
    pAbc->pGia  = pNew;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
Gia_Man_t * Abc_FrameGetGia( Abc_Frame_t * pAbc )
{
    Gia_Man_t * pGia;
    if ( pAbc->pGia2 )
        Gia_ManStop( pAbc->pGia2 );
    pAbc->pGia2 = NULL;
    pGia = pAbc->pGia;
    pAbc->pGia = NULL;
    return pGia;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_Init( Abc_Frame_t * pAbc )
{
    Cmd_CommandAdd( pAbc, "Printing",     "print_stats",   Abc_CommandPrintStats,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_exdc",    Abc_CommandPrintExdc,        0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_io",      Abc_CommandPrintIo,          0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_latch",   Abc_CommandPrintLatch,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_fanio",   Abc_CommandPrintFanio,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_mffc",    Abc_CommandPrintMffc,        0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_factor",  Abc_CommandPrintFactor,      0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_level",   Abc_CommandPrintLevel,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_supp",    Abc_CommandPrintSupport,     0 );
#ifdef ABC_USE_CUDD
    Cmd_CommandAdd( pAbc, "Printing",     "print_mint",    Abc_CommandPrintMint,        0 );
#endif
    Cmd_CommandAdd( pAbc, "Printing",     "print_symm",    Abc_CommandPrintSymms,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_unate",   Abc_CommandPrintUnate,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_auto",    Abc_CommandPrintAuto,        0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_kmap",    Abc_CommandPrintKMap,        0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_gates",   Abc_CommandPrintGates,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_sharing", Abc_CommandPrintSharing,     0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_xcut",    Abc_CommandPrintXCut,        0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_dsd",     Abc_CommandPrintDsd,         0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_cone",    Abc_CommandPrintCone,        0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_miter",   Abc_CommandPrintMiter,       0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_status",  Abc_CommandPrintStatus,      0 );
    Cmd_CommandAdd( pAbc, "Printing",     "print_delay",   Abc_CommandPrintDelay,       0 );

    Cmd_CommandAdd( pAbc, "Printing",     "show",          Abc_CommandShow,             0 );
    Cmd_CommandAdd( pAbc, "Printing",     "show_bdd",      Abc_CommandShowBdd,          0 );
    Cmd_CommandAdd( pAbc, "Printing",     "show_cut",      Abc_CommandShowCut,          0 );

    Cmd_CommandAdd( pAbc, "Synthesis",    "collapse",      Abc_CommandCollapse,         1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "satclp",        Abc_CommandSatClp,           1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "strash",        Abc_CommandStrash,           1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "balance",       Abc_CommandBalance,          1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "mux_struct",    Abc_CommandMuxStruct,        1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "multi",         Abc_CommandMulti,            1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "renode",        Abc_CommandRenode,           1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "cleanup",       Abc_CommandCleanup,          1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "sweep",         Abc_CommandSweep,            1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "fx",            Abc_CommandFastExtract,      1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "fxch",          Abc_CommandFxch,             1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "eliminate",     Abc_CommandEliminate,        1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "dsd",           Abc_CommandDisjoint,         1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "sparsify",      Abc_CommandSparsify,         1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "lutpack",       Abc_CommandLutpack,          1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "lutmin",        Abc_CommandLutmin,           1 );
//    Cmd_CommandAdd( pAbc, "Synthesis",    "imfs",          Abc_CommandImfs,             1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "mfs",           Abc_CommandMfs,              1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "mfs2",          Abc_CommandMfs2,             1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "mfs3",          Abc_CommandMfs3,             1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "mfse",          Abc_CommandMfse,              1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "logicpush",     Abc_CommandLogicPush,        1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "trace",         Abc_CommandTrace,            0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "glitch",        Abc_CommandGlitch,           0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "speedup",       Abc_CommandSpeedup,          1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "powerdown",     Abc_CommandPowerdown,        1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "addbuffs",      Abc_CommandAddBuffs,         1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "merge",         Abc_CommandMerge,            1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "testdec",       Abc_CommandTestDec,          0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "testnpn",       Abc_CommandTestNpn,          0 );
    Cmd_CommandAdd( pAbc, "LogiCS",       "testrpo",       Abc_CommandTestRPO,          0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "testtruth",     Abc_CommandTestTruth,        0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "runeco",        Abc_CommandRunEco,           0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "rungen",        Abc_CommandRunGen,           0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "xec",           Abc_CommandRunTest,          0 );

    Cmd_CommandAdd( pAbc, "Synthesis",    "rewrite",       Abc_CommandRewrite,          1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "refactor",      Abc_CommandRefactor,         1 );
//    Cmd_CommandAdd( pAbc, "Synthesis",    "restructure",   Abc_CommandRestructure,      1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "resub",         Abc_CommandResubstitute,     1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "resub_check",   Abc_CommandResubCheck,       0 );
//    Cmd_CommandAdd( pAbc, "Synthesis",    "rr",            Abc_CommandRr,               1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "cascade",       Abc_CommandCascade,          1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "extract",       Abc_CommandExtract,          1 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "varmin",        Abc_CommandVarMin,           0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "faultclasses",  Abc_CommandFaultClasses,     0 );
    Cmd_CommandAdd( pAbc, "Synthesis",    "exact",         Abc_CommandExact,            1 );

    Cmd_CommandAdd( pAbc, "Exact synthesis", "bms_start",  Abc_CommandBmsStart,         0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "bms_stop",   Abc_CommandBmsStop,          0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "bms_ps",     Abc_CommandBmsPs,            0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "majexact",   Abc_CommandMajExact,         0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "twoexact",   Abc_CommandTwoExact,         0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "lutexact",   Abc_CommandLutExact,         0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "allexact",   Abc_CommandAllExact,         0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "testexact",  Abc_CommandTestExact,        0 );
    Cmd_CommandAdd( pAbc, "Exact synthesis", "majgen",     Abc_CommandMajGen,           0 );

    Cmd_CommandAdd( pAbc, "Various",      "logic",         Abc_CommandLogic,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "comb",          Abc_CommandComb,             1 );
    Cmd_CommandAdd( pAbc, "Various",      "miter",         Abc_CommandMiter,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "miter2",        Abc_CommandMiter2,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "demiter",       Abc_CommandDemiter,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "orpos",         Abc_CommandOrPos,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "andpos",        Abc_CommandAndPos,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "zeropo",        Abc_CommandZeroPo,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "swappos",       Abc_CommandSwapPos,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "removepo",      Abc_CommandRemovePo,         1 );
    Cmd_CommandAdd( pAbc, "Various",      "dropsat",       Abc_CommandDropSat,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "addpi",         Abc_CommandAddPi,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "append",        Abc_CommandAppend,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "putontop",      Abc_CommandPutOnTop,         1 );
    Cmd_CommandAdd( pAbc, "Various",      "frames",        Abc_CommandFrames,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "dframes",       Abc_CommandDFrames,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "sop",           Abc_CommandSop,              0 );
    Cmd_CommandAdd( pAbc, "Various",      "bdd",           Abc_CommandBdd,              0 );
    Cmd_CommandAdd( pAbc, "Various",      "aig",           Abc_CommandAig,              0 );
    Cmd_CommandAdd( pAbc, "Various",      "reorder",       Abc_CommandReorder,          0 );
    Cmd_CommandAdd( pAbc, "Various",      "bidec",         Abc_CommandBidec,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "order",         Abc_CommandOrder,            0 );
    Cmd_CommandAdd( pAbc, "Various",      "muxes",         Abc_CommandMuxes,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "cubes",         Abc_CommandCubes,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "expand",        Abc_CommandExpand,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "splitsop",      Abc_CommandSplitSop,         1 );
    Cmd_CommandAdd( pAbc, "Various",      "ext_seq_dcs",   Abc_CommandExtSeqDcs,        0 );
    Cmd_CommandAdd( pAbc, "Various",      "reach",         Abc_CommandReach,            0 );
    Cmd_CommandAdd( pAbc, "Various",      "cone",          Abc_CommandCone,             1 );
    Cmd_CommandAdd( pAbc, "Various",      "node",          Abc_CommandNode,             1 );
    Cmd_CommandAdd( pAbc, "Various",      "range",         Abc_CommandRange,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "cof",           Abc_CommandCof,              1 );
    Cmd_CommandAdd( pAbc, "Various",      "topmost",       Abc_CommandTopmost,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "bottommost",    Abc_CommandBottommost,       1 );
    Cmd_CommandAdd( pAbc, "Various",      "topand",        Abc_CommandTopAnd,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "trim",          Abc_CommandTrim,             1 );
    Cmd_CommandAdd( pAbc, "Various",      "short_names",   Abc_CommandShortNames,       0 );
    Cmd_CommandAdd( pAbc, "Various",      "move_names",    Abc_CommandMoveNames,        0 );
    Cmd_CommandAdd( pAbc, "Various",      "exdc_free",     Abc_CommandExdcFree,         1 );
    Cmd_CommandAdd( pAbc, "Various",      "exdc_get",      Abc_CommandExdcGet,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "exdc_set",      Abc_CommandExdcSet,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "care_set",      Abc_CommandCareSet,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "cut",           Abc_CommandCut,              0 );
    Cmd_CommandAdd( pAbc, "Various",      "espresso",      Abc_CommandEspresso,         1 );
    Cmd_CommandAdd( pAbc, "Various",      "gen",           Abc_CommandGen,              0 );
    Cmd_CommandAdd( pAbc, "Various",      "genfsm",        Abc_CommandGenFsm,           0 );
    Cmd_CommandAdd( pAbc, "Various",      "cover",         Abc_CommandCover,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "double",        Abc_CommandDouble,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "inter",         Abc_CommandInter,            1 );
    Cmd_CommandAdd( pAbc, "Various",      "bb2wb",         Abc_CommandBb2Wb,            0 );
    Cmd_CommandAdd( pAbc, "Various",      "outdec",        Abc_CommandOutdec,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "nodedup",       Abc_CommandNodeDup,          1 );
    Cmd_CommandAdd( pAbc, "Various",      "testcolor",     Abc_CommandTestColor,        0 );
    Cmd_CommandAdd( pAbc, "Various",      "test",          Abc_CommandTest,             0 );
//    Cmd_CommandAdd( pAbc, "Various",      "qbf_solve",     Abc_CommandTest,               0 );

    Cmd_CommandAdd( pAbc, "Various",      "qvar",          Abc_CommandQuaVar,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "qrel",          Abc_CommandQuaRel,           1 );
    Cmd_CommandAdd( pAbc, "Various",      "qreach",        Abc_CommandQuaReach,         1 );
    Cmd_CommandAdd( pAbc, "Various",      "senseinput",    Abc_CommandSenseInput,       1 );
    Cmd_CommandAdd( pAbc, "Various",      "npnload",       Abc_CommandNpnLoad,          0 );
    Cmd_CommandAdd( pAbc, "Various",      "npnsave",       Abc_CommandNpnSave,          0 );

    Cmd_CommandAdd( pAbc, "Various",      "send_aig",      Abc_CommandSendAig,          0 );
    Cmd_CommandAdd( pAbc, "Various",      "send_status",   Abc_CommandSendStatus,       0 );

    Cmd_CommandAdd( pAbc, "Various",      "backup",        Abc_CommandBackup,           0 );
    Cmd_CommandAdd( pAbc, "Various",      "restore",       Abc_CommandRestore,          0 );

    Cmd_CommandAdd( pAbc, "Various",      "minisat",       Abc_CommandMinisat,          0 );
    Cmd_CommandAdd( pAbc, "Various",      "minisimp",      Abc_CommandMinisimp,         0 );

    Cmd_CommandAdd( pAbc, "New AIG",      "istrash",       Abc_CommandIStrash,          1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "icut",          Abc_CommandICut,             0 );
    Cmd_CommandAdd( pAbc, "New AIG",      "irw",           Abc_CommandIRewrite,         1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "drw",           Abc_CommandDRewrite,         1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "drf",           Abc_CommandDRefactor,        1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "dc2",           Abc_CommandDc2,              1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "dchoice",       Abc_CommandDChoice,          1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "dch",           Abc_CommandDch,              1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "drwsat",        Abc_CommandDrwsat,           1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "irws",          Abc_CommandIRewriteSeq,      1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "iresyn",        Abc_CommandIResyn,           1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "isat",          Abc_CommandISat,             1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "ifraig",        Abc_CommandIFraig,           1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "dfraig",        Abc_CommandDFraig,           1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "csweep",        Abc_CommandCSweep,           1 );
//    Cmd_CommandAdd( pAbc, "New AIG",      "haig",          Abc_CommandHaig,             1 );
    Cmd_CommandAdd( pAbc, "New AIG",      "qbf",           Abc_CommandQbf,              0 );

    Cmd_CommandAdd( pAbc, "Fraiging",     "fraig",         Abc_CommandFraig,            1 );
    Cmd_CommandAdd( pAbc, "Fraiging",     "fraig_trust",   Abc_CommandFraigTrust,       1 );
    Cmd_CommandAdd( pAbc, "Fraiging",     "fraig_store",   Abc_CommandFraigStore,       0 );
    Cmd_CommandAdd( pAbc, "Fraiging",     "fraig_restore", Abc_CommandFraigRestore,     1 );
    Cmd_CommandAdd( pAbc, "Fraiging",     "fraig_clean",   Abc_CommandFraigClean,       0 );
    Cmd_CommandAdd( pAbc, "Fraiging",     "fraig_sweep",   Abc_CommandFraigSweep,       1 );
    Cmd_CommandAdd( pAbc, "Fraiging",     "dress",         Abc_CommandFraigDress,       1 );
    Cmd_CommandAdd( pAbc, "Fraiging",     "dump_equiv",    Abc_CommandDumpEquiv,        0 );

    Cmd_CommandAdd( pAbc, "Choicing",     "rec_start3",    Abc_CommandRecStart3,        0 );
    Cmd_CommandAdd( pAbc, "Choicing",     "rec_stop3",     Abc_CommandRecStop3,         0 );
    Cmd_CommandAdd( pAbc, "Choicing",     "rec_ps3",       Abc_CommandRecPs3,           0 );
    Cmd_CommandAdd( pAbc, "Choicing",     "rec_add3",      Abc_CommandRecAdd3,          0 );
    Cmd_CommandAdd( pAbc, "Choicing",     "rec_dump3",     Abc_CommandRecDump3,         0 );
    Cmd_CommandAdd( pAbc, "Choicing",     "rec_merge3",    Abc_CommandRecMerge3,        0 );

    Cmd_CommandAdd( pAbc, "SC mapping",   "map",           Abc_CommandMap,              1 );
    Cmd_CommandAdd( pAbc, "SC mapping",   "amap",          Abc_CommandAmap,             1 );
    Cmd_CommandAdd( pAbc, "SC mapping",   "phase_map",     Abc_CommandPhaseMap,         1 );
    Cmd_CommandAdd( pAbc, "SC mapping",   "unmap",         Abc_CommandUnmap,            1 );
    Cmd_CommandAdd( pAbc, "SC mapping",   "attach",        Abc_CommandAttach,           1 );
    Cmd_CommandAdd( pAbc, "SC mapping",   "superc",        Abc_CommandSuperChoice,      1 );
    Cmd_CommandAdd( pAbc, "SC mapping",   "supercl",       Abc_CommandSuperChoiceLut,   1 );
    Cmd_CommandAdd( pAbc, "SC mapping",   "timescale",     Abc_CommandTimeScale,        0 );

//    Cmd_CommandAdd( pAbc, "FPGA mapping", "fpga",          Abc_CommandFpga,             1 );
//    Cmd_CommandAdd( pAbc, "FPGA mapping", "ffpga",         Abc_CommandFpgaFast,         1 );
    Cmd_CommandAdd( pAbc, "FPGA mapping", "if",            Abc_CommandIf,               1 );
    Cmd_CommandAdd( pAbc, "FPGA mapping", "ifif",          Abc_CommandIfif,             1 );

    Cmd_CommandAdd( pAbc, "DSD manager",  "dsd_save",      Abc_CommandDsdSave,          0 );
    Cmd_CommandAdd( pAbc, "DSD manager",  "dsd_load",      Abc_CommandDsdLoad,          0 );
    Cmd_CommandAdd( pAbc, "DSD manager",  "dsd_free",      Abc_CommandDsdFree,          0 );
    Cmd_CommandAdd( pAbc, "DSD manager",  "dsd_ps",        Abc_CommandDsdPs,            0 );
    Cmd_CommandAdd( pAbc, "DSD manager",  "dsd_match",     Abc_CommandDsdMatch,         0 );
    Cmd_CommandAdd( pAbc, "DSD manager",  "dsd_merge",     Abc_CommandDsdMerge,         0 );
    Cmd_CommandAdd( pAbc, "DSD manager",  "dsd_filter",    Abc_CommandDsdFilter,        0 );

//    Cmd_CommandAdd( pAbc, "Sequential",   "scut",          Abc_CommandScut,             0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "init",          Abc_CommandInit,             1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "zero",          Abc_CommandZero,             1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "undc",          Abc_CommandUndc,             1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "onehot",        Abc_CommandOneHot,           1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "pipe",          Abc_CommandPipe,             1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "retime",        Abc_CommandRetime,           1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "dretime",       Abc_CommandDRetime,          1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "fretime",       Abc_CommandFlowRetime,       1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "cretime",       Abc_CommandCRetime,          1 );
//    Cmd_CommandAdd( pAbc, "Sequential",   "sfpga",         Abc_CommandSeqFpga,          1 );
//    Cmd_CommandAdd( pAbc, "Sequential",   "smap",          Abc_CommandSeqMap,           1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "ssweep",        Abc_CommandSeqSweep,         1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "scorr",         Abc_CommandSeqSweep2,        1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "testssw",       Abc_CommandTestSeqSweep,     0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "testscorr",     Abc_CommandTestScorr,        0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "lcorr",         Abc_CommandLcorr,            1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "scleanup",      Abc_CommandSeqCleanup,       1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "cycle",         Abc_CommandCycle,            1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "xsim",          Abc_CommandXsim,             0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "sim",           Abc_CommandSim,              0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "sim3",          Abc_CommandSim3,             0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "phase",         Abc_CommandDarPhase,         1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "synch",         Abc_CommandSynch,            1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "clockgate",     Abc_CommandClockGate,        1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "extwin",        Abc_CommandExtWin,           1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "inswin",        Abc_CommandInsWin,           1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "symfun",        Abc_CommandSymFun,           0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "permute",       Abc_CommandPermute,          1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "unpermute",     Abc_CommandUnpermute,        1 );
    Cmd_CommandAdd( pAbc, "Sequential",   "cubeenum",      Abc_CommandCubeEnum,         0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "pathenum",      Abc_CommandPathEnum,         0 );
    Cmd_CommandAdd( pAbc, "Sequential",   "funenum",       Abc_CommandFunEnum,          0 );

    Cmd_CommandAdd( pAbc, "Verification", "cec",           Abc_CommandCec,              0 );
    Cmd_CommandAdd( pAbc, "Verification", "dcec",          Abc_CommandDCec,             0 );
    Cmd_CommandAdd( pAbc, "Verification", "dsec",          Abc_CommandDSec,             0 );
    Cmd_CommandAdd( pAbc, "Verification", "dprove",        Abc_CommandDProve,           0 );
    Cmd_CommandAdd( pAbc, "Verification", "absec",         Abc_CommandAbSec,            0 );
    Cmd_CommandAdd( pAbc, "Verification", "simsec",        Abc_CommandSimSec,           0 );
    Cmd_CommandAdd( pAbc, "Verification", "match",         Abc_CommandMatch,            0 );
    Cmd_CommandAdd( pAbc, "Verification", "sat",           Abc_CommandSat,              0 );
    Cmd_CommandAdd( pAbc, "Verification", "dsat",          Abc_CommandDSat,             0 );
    Cmd_CommandAdd( pAbc, "Verification", "xsat",          Abc_CommandXSat,             0 );
    Cmd_CommandAdd( pAbc, "Verification", "satoko",        Abc_CommandSatoko,           0 );
    Cmd_CommandAdd( pAbc, "Verification", "&satoko",       Abc_CommandAbc9Satoko,       0 );
    Cmd_CommandAdd( pAbc, "Verification", "&sat3",         Abc_CommandAbc9Sat3,         0 );
    Cmd_CommandAdd( pAbc, "Verification", "&kissat",       Abc_CommandAbc9Kissat,       0 );
    Cmd_CommandAdd( pAbc, "Verification", "psat",          Abc_CommandPSat,             0 );
    Cmd_CommandAdd( pAbc, "Verification", "prove",         Abc_CommandProve,            1 );
    Cmd_CommandAdd( pAbc, "Verification", "iprove",        Abc_CommandIProve,           1 );
    Cmd_CommandAdd( pAbc, "Verification", "debug",         Abc_CommandDebug,            0 );
    Cmd_CommandAdd( pAbc, "Verification", "eco",           Abc_CommandEco,              0 );
    Cmd_CommandAdd( pAbc, "Verification", "bmc",           Abc_CommandBmc,              0 );
    Cmd_CommandAdd( pAbc, "Verification", "bmc2",          Abc_CommandBmc2,             0 );
    Cmd_CommandAdd( pAbc, "Verification", "bmc3",          Abc_CommandBmc3,             1 );
    Cmd_CommandAdd( pAbc, "Verification", "int",           Abc_CommandBmcInter,         1 );
    Cmd_CommandAdd( pAbc, "Verification", "indcut",        Abc_CommandIndcut,           0 );
    Cmd_CommandAdd( pAbc, "Verification", "enlarge",       Abc_CommandEnlarge,          1 );
    Cmd_CommandAdd( pAbc, "Verification", "tempor",        Abc_CommandTempor,           1 );
    Cmd_CommandAdd( pAbc, "Verification", "ind",           Abc_CommandInduction,        0 );
    Cmd_CommandAdd( pAbc, "Verification", "constr",        Abc_CommandConstr,           0 );
    Cmd_CommandAdd( pAbc, "Verification", "unfold",        Abc_CommandUnfold,           1 );
    Cmd_CommandAdd( pAbc, "Verification", "fold",          Abc_CommandFold,             1 );
    Cmd_CommandAdd( pAbc, "Verification", "unfold2",       Abc_CommandUnfold2,          1 );    // jlong
    Cmd_CommandAdd( pAbc, "Verification", "fold2",         Abc_CommandFold2,            1 );    // jlong
    Cmd_CommandAdd( pAbc, "Verification", "bm",            Abc_CommandBm,               1 );
    Cmd_CommandAdd( pAbc, "Verification", "bm2",           Abc_CommandBm2,              1 );
    Cmd_CommandAdd( pAbc, "Verification", "saucy3",        Abc_CommandSaucy,            1 );
    Cmd_CommandAdd( pAbc, "Verification", "testcex",       Abc_CommandTestCex,          0 );
    Cmd_CommandAdd( pAbc, "Verification", "pdr",           Abc_CommandPdr,              0 );
#ifdef ABC_USE_CUDD
    Cmd_CommandAdd( pAbc, "Verification", "reconcile",     Abc_CommandReconcile,        1 );
#endif
    Cmd_CommandAdd( pAbc, "Verification", "cexsave",       Abc_CommandCexSave,          0 );
    Cmd_CommandAdd( pAbc, "Verification", "cexload",       Abc_CommandCexLoad,          0 );
    Cmd_CommandAdd( pAbc, "Verification", "cexcut",        Abc_CommandCexCut,           0 );
    Cmd_CommandAdd( pAbc, "Verification", "cexmerge",      Abc_CommandCexMerge,         0 );
//    Cmd_CommandAdd( pAbc, "Verification", "cexmin",        Abc_CommandCexMin,           0 );
    Cmd_CommandAdd( pAbc, "Verification", "dualrail",      Abc_CommandDualRail,         1 );
    Cmd_CommandAdd( pAbc, "Verification", "blockpo",       Abc_CommandBlockPo,          1 );
    Cmd_CommandAdd( pAbc, "Verification", "iso",           Abc_CommandIso,              1 );

    Cmd_CommandAdd( pAbc, "Various",      "save",          Abc_CommandAbcSave,          0 );
    Cmd_CommandAdd( pAbc, "Various",      "load",          Abc_CommandAbcLoad,          0 );

    Cmd_CommandAdd( pAbc, "ABC9",         "&get",          Abc_CommandAbc9Get,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&put",          Abc_CommandAbc9Put,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&move_names",   Abc_CommandAbc9MoveNames,    0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&save",         Abc_CommandAbc9Save,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&save2",        Abc_CommandAbc9Save2,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&saveaig",      Abc_CommandAbc9SaveAig,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&load",         Abc_CommandAbc9Load,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&load2",        Abc_CommandAbc9Load2,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&loadaig",      Abc_CommandAbc9LoadAig,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&r",            Abc_CommandAbc9Read,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&read",         Abc_CommandAbc9Read,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&read_blif",    Abc_CommandAbc9ReadBlif,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&read_cblif",   Abc_CommandAbc9ReadCBlif,    0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&read_stg",     Abc_CommandAbc9ReadStg,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&read_ver",     Abc_CommandAbc9ReadVer,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&write_ver",    Abc_CommandAbc9WriteVer,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&w",            Abc_CommandAbc9Write,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&write",        Abc_CommandAbc9Write,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&wlut",         Abc_CommandAbc9WriteLut,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&ps",           Abc_CommandAbc9Ps,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&pfan",         Abc_CommandAbc9PFan,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&psig",         Abc_CommandAbc9PSig,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&status",       Abc_CommandAbc9Status,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&profile",      Abc_CommandAbc9MuxProfile,   0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&muxpos",       Abc_CommandAbc9MuxPos,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&muxstr",       Abc_CommandAbc9MuxStr,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&muxdec",       Abc_CommandAbc9MuxDec,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&print_truth",  Abc_CommandAbc9PrintTruth,   0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&unate",        Abc_CommandAbc9Unate,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&rex2gia",      Abc_CommandAbc9Rex2Gia,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&rexwalk",      Abc_CommandAbc9RexWalk,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&show",         Abc_CommandAbc9Show,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&setregnum",    Abc_CommandAbc9SetRegNum,    0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&st",           Abc_CommandAbc9Strash,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&topand",       Abc_CommandAbc9Topand,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&add1hot",      Abc_CommandAbc9Add1Hot,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&cof",          Abc_CommandAbc9Cof,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&trim",         Abc_CommandAbc9Trim,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&dfs",          Abc_CommandAbc9Dfs,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sim",          Abc_CommandAbc9Sim,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sim2",         Abc_CommandAbc9Sim2,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sim3",         Abc_CommandAbc9Sim3,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&mlgen",        Abc_CommandAbc9MLGen,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&mltest",       Abc_CommandAbc9MLTest,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&iwls21test",   Abc_CommandAbc9Iwls21Test,   0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sim_read",     Abc_CommandAbc9ReadSim,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sim_write",    Abc_CommandAbc9WriteSim,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sim_print",    Abc_CommandAbc9PrintSim,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sim_gen",      Abc_CommandAbc9GenSim,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&simrsb",       Abc_CommandAbc9SimRsb,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&resim",        Abc_CommandAbc9Resim,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&speci",        Abc_CommandAbc9SpecI,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&equiv",        Abc_CommandAbc9Equiv,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&equiv2",       Abc_CommandAbc9Equiv2,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&equiv3",       Abc_CommandAbc9Equiv3,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&semi",         Abc_CommandAbc9Semi,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&times",        Abc_CommandAbc9Times,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&frames",       Abc_CommandAbc9Frames,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&retime",       Abc_CommandAbc9Retime,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&enable",       Abc_CommandAbc9Enable,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&dc2",          Abc_CommandAbc9Dc2,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&dsd",          Abc_CommandAbc9Dsd,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&bidec",        Abc_CommandAbc9Bidec,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&shrink",       Abc_CommandAbc9Shrink,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&fx",           Abc_CommandAbc9Fx,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&extract",      Abc_CommandAbc9Extract,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&b",            Abc_CommandAbc9Balance,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&blut",         Abc_CommandAbc9BalanceLut,   0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&resub",        Abc_CommandAbc9Resub,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&reshape",      Abc_CommandAbc9Reshape,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&syn2",         Abc_CommandAbc9Syn2,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&syn3",         Abc_CommandAbc9Syn3,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&syn4",         Abc_CommandAbc9Syn4,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&synch2",       Abc_CommandAbc9Synch2,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&false",        Abc_CommandAbc9False,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&miter",        Abc_CommandAbc9Miter,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&miter2",       Abc_CommandAbc9Miter2,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&append",       Abc_CommandAbc9Append,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&scl",          Abc_CommandAbc9Scl,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&lcorr",        Abc_CommandAbc9Lcorr,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&scorr",        Abc_CommandAbc9Scorr,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&choice",       Abc_CommandAbc9Choice,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sat",          Abc_CommandAbc9Sat,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&satenum",      Abc_CommandAbc9SatEnum,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&fraig",        Abc_CommandAbc9Fraig,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&cfraig",       Abc_CommandAbc9CFraig,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&srm",          Abc_CommandAbc9Srm,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&srm2",         Abc_CommandAbc9Srm2,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&filter",       Abc_CommandAbc9Filter,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&reduce",       Abc_CommandAbc9Reduce,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&equiv_mark",   Abc_CommandAbc9EquivMark,    0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&equiv_filter", Abc_CommandAbc9EquivFilter,  0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&cec",          Abc_CommandAbc9Cec,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&icec",         Abc_CommandAbc9ICec,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&verify",       Abc_CommandAbc9Verify,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sweep",        Abc_CommandAbc9Sweep,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&force",        Abc_CommandAbc9Force,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&embed",        Abc_CommandAbc9Embed,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sopb",         Abc_CommandAbc9Sopb,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&dsdb",         Abc_CommandAbc9Dsdb,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&flow",         Abc_CommandAbc9Flow,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&flow2",        Abc_CommandAbc9Flow2,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&flow3",        Abc_CommandAbc9Flow3,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&if",           Abc_CommandAbc9If,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&iff",          Abc_CommandAbc9Iff,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&iiff",         Abc_CommandAbc9Iiff,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&if2",          Abc_CommandAbc9If2,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sif",          Abc_CommandAbc9Sif,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&jf",           Abc_CommandAbc9Jf,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&kf",           Abc_CommandAbc9Kf,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&lf",           Abc_CommandAbc9Lf,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&mf",           Abc_CommandAbc9Mf,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&nf",           Abc_CommandAbc9Nf,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&of",           Abc_CommandAbc9Of,           0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&pack",         Abc_CommandAbc9Pack,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&edge",         Abc_CommandAbc9Edge,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&satlut",       Abc_CommandAbc9SatLut,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&lnetread",     Abc_CommandAbc9LNetRead,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&lnetsim",      Abc_CommandAbc9LNetSim,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&lneteval",     Abc_CommandAbc9LNetEval,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&lnetopt",      Abc_CommandAbc9LNetOpt,      0 );
//#ifndef _WIN32
    Cmd_CommandAdd( pAbc, "ABC9",         "&ttopt",        Abc_CommandAbc9Ttopt,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&transduction", Abc_CommandAbc9Transduction, 0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&transtoch"   , Abc_CommandAbc9TranStoch,    0 );
//#endif
    Cmd_CommandAdd( pAbc, "ABC9",         "&lnetmap",      Abc_CommandAbc9LNetMap,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&unmap",        Abc_CommandAbc9Unmap,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&struct",       Abc_CommandAbc9Struct,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&trace",        Abc_CommandAbc9Trace,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&speedup",      Abc_CommandAbc9Speedup,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&era",          Abc_CommandAbc9Era,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&dch",          Abc_CommandAbc9Dch,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&rpm",          Abc_CommandAbc9Rpm,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&back_reach",   Abc_CommandAbc9BackReach,    0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&posplit",      Abc_CommandAbc9Posplit,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&permute",      Abc_CommandAbc9Permute,      0 );
#ifdef ABC_USE_CUDD
    Cmd_CommandAdd( pAbc, "ABC9",         "&reachm",       Abc_CommandAbc9ReachM,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&reachp",       Abc_CommandAbc9ReachP,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&reachn",       Abc_CommandAbc9ReachN,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&reachy",       Abc_CommandAbc9ReachY,       0 );
#endif
    Cmd_CommandAdd( pAbc, "ABC9",         "&undo",         Abc_CommandAbc9Undo,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&mesh",         Abc_CommandAbc9Mesh,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&iso",          Abc_CommandAbc9Iso,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&isonpn",       Abc_CommandAbc9IsoNpn,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&isost",        Abc_CommandAbc9IsoSt,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&compare",      Abc_CommandAbc9Compare,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&reveng",       Abc_CommandAbc9RevEng,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&uif",          Abc_CommandAbc9Uif,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&cexinfo",      Abc_CommandAbc9CexInfo,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&cycle",        Abc_CommandAbc9Cycle,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&cone",         Abc_CommandAbc9Cone,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&slice",        Abc_CommandAbc9Slice,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&popart",       Abc_CommandAbc9PoPart,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&gprove",       Abc_CommandAbc9GroupProve,   0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&mprove",       Abc_CommandAbc9MultiProve,   0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&splitprove",   Abc_CommandAbc9SplitProve,   0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&bmc",          Abc_CommandAbc9Bmc,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&bmcs",         Abc_CommandAbc9SBmc,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&chainbmc",     Abc_CommandAbc9ChainBmc,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&bcore",        Abc_CommandAbc9BCore,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&icheck",       Abc_CommandAbc9ICheck,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&sattest",      Abc_CommandAbc9SatTest,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&fftest",       Abc_CommandAbc9FFTest,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&qbf",          Abc_CommandAbc9Qbf,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&qvar",         Abc_CommandAbc9QVar,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&genqbf",       Abc_CommandAbc9GenQbf,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&homoqbf",      Abc_CommandAbc9HomoQbf,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&satfx",        Abc_CommandAbc9SatFx,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&satclp",       Abc_CommandAbc9SatClp,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&inse",         Abc_CommandAbc9Inse,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&maxi",         Abc_CommandAbc9Maxi,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&bmci",         Abc_CommandAbc9Bmci,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&poxsim",       Abc_CommandAbc9PoXsim,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&demiter",      Abc_CommandAbc9Demiter,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&fadds",        Abc_CommandAbc9Fadds,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&atree",        Abc_CommandAbc9ATree,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&polyn",        Abc_CommandAbc9Polyn,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&acec",         Abc_CommandAbc9Acec,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&anorm",        Abc_CommandAbc9Anorm,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&decla",        Abc_CommandAbc9Decla,        0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&esop",         Abc_CommandAbc9Esop,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&exorcism",     Abc_CommandAbc9Exorcism,     0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&mfs",          Abc_CommandAbc9Mfs,          0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&mfsd",         Abc_CommandAbc9Mfsd,         0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&deepsyn",      Abc_CommandAbc9DeepSyn,      0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&satsyn",       Abc_CommandAbc9SatSyn,       0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&stochsyn",     Abc_CommandAbc9StochSyn,     0 );
//    Cmd_CommandAdd( pAbc, "ABC9",         "&popart2",      Abc_CommandAbc9PoPart2,      0 );
//    Cmd_CommandAdd( pAbc, "ABC9",         "&cexcut",       Abc_CommandAbc9CexCut,       0 );
//    Cmd_CommandAdd( pAbc, "ABC9",         "&cexmerge",     Abc_CommandAbc9CexMerge,     0 );
//    Cmd_CommandAdd( pAbc, "ABC9",         "&cexmin",       Abc_CommandAbc9CexMin,       0 );

    Cmd_CommandAdd( pAbc, "Abstraction",  "&abs_create",   Abc_CommandAbc9AbsCreate,    0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&abs_derive",   Abc_CommandAbc9AbsDerive,    0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&abs_refine",   Abc_CommandAbc9AbsRefine,    0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&gla_derive",   Abc_CommandAbc9GlaDerive,    0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&gla_refine",   Abc_CommandAbc9GlaRefine,    0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&gla_shrink",   Abc_CommandAbc9GlaShrink,    0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&gla",          Abc_CommandAbc9Gla,          0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&vta",          Abc_CommandAbc9Vta,          0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&vta_gla",      Abc_CommandAbc9Vta2Gla,      0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&gla_vta",      Abc_CommandAbc9Gla2Vta,      0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&fla_gla",      Abc_CommandAbc9Fla2Gla,      0 );
    Cmd_CommandAdd( pAbc, "Abstraction",  "&gla_fla",      Abc_CommandAbc9Gla2Fla,      0 );

    Cmd_CommandAdd( pAbc, "Liveness",     "l2s",           Abc_CommandAbcLivenessToSafety,        0 );
    Cmd_CommandAdd( pAbc, "Liveness",     "l2ssim",        Abc_CommandAbcLivenessToSafetySim,     0 );
    Cmd_CommandAdd( pAbc, "Liveness",     "l3s",           Abc_CommandAbcLivenessToSafetyWithLTL, 0 );
    Cmd_CommandAdd( pAbc, "Liveness",     "kcs",           Abc_CommandCS_kLiveness,               0 );
    Cmd_CommandAdd( pAbc, "Liveness",     "nck",           Abc_CommandNChooseK,                   0 );

    Cmd_CommandAdd( pAbc, "ABC9",         "&gen",          Abc_CommandAbc9Gen,                    0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&cfs",          Abc_CommandAbc9Cfs,                    0 );
    Cmd_CommandAdd( pAbc, "ABC9",         "&prodadd",      Abc_CommandAbc9ProdAdd,                0 );

    Cmd_CommandAdd( pAbc, "ABC9",         "&test",         Abc_CommandAbc9Test,         0 );
    {
//        extern Mf_ManTruthCount();
//        Mf_ManTruthCount();
    }

    {
        extern void Dar_LibStart();
        Dar_LibStart();
    }
    {
//        extern void Dau_DsdTest();
//        Dau_DsdTest();
//        extern void If_ManSatTest();
//        If_ManSatTest();
    }

//    if ( Sdm_ManCanRead() )
//        Sdm_ManRead();
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Abc_End( Abc_Frame_t * pAbc )
{
    extern Abc_Frame_t * Abc_FrameGetGlobalFrame();
    Abc_FrameClearDesign();
    Cnf_ManFree();
    {
        extern int Abc_NtkCompareAndSaveBest( Abc_Ntk_t * pNtk );
        Abc_NtkCompareAndSaveBest( NULL );
    }
    {
        extern void Dar_LibStop();
        Dar_LibStop();
    }
    {
        extern void Aig_RManQuit();
        Aig_RManQuit();
    }
    {
        extern void Npn_ManClean();
        Npn_ManClean();
    }
    {
        extern void Sdm_ManQuit();
        Sdm_ManQuit();
    }
    Abc_NtkFraigStoreClean();
    Gia_ManStopP( &pAbc->pGia );
    Gia_ManStopP( &pAbc->pGia2 );
    Gia_ManStopP( &pAbc->pGiaBest );
    Gia_ManStopP( &pAbc->pGiaBest2 );
    Gia_ManStopP( &pAbc->pGiaSaved );
    if ( Abc_NtkRecIsRunning3() )
        Abc_NtkRecStop3();
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintStats( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int fFactor;
    int fSaveBest;
    int fDumpResult;
    int fUseLutLib;
    int fPrintTime;
    int fPrintMuxes;
    int fPower;
    int fGlitch;
    int fSkipBuf;
    int fSkipSmall;
    int fPrintMem;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);

    // set the defaults
    fFactor   = 0;
    fSaveBest = 0;
    fDumpResult = 0;
    fUseLutLib = 0;
    fPrintTime = 0;
    fPrintMuxes = 0;
    fPower = 0;
    fGlitch = 0;
    fSkipBuf = 0;
    fSkipSmall = 0;
    fPrintMem = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "fbdltmpgscuh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'f':
            fFactor ^= 1;
            break;
        case 'b':
            fSaveBest ^= 1;
            break;
        case 'd':
            fDumpResult ^= 1;
            break;
        case 'l':
            fUseLutLib ^= 1;
            break;
        case 't':
            fPrintTime ^= 1;
            break;
        case 'm':
            fPrintMuxes ^= 1;
            break;
        case 'p':
            fPower ^= 1;
            break;
        case 'g':
            fGlitch ^= 1;
            break;
        case 's':
            fSkipBuf ^= 1;
            break;
        case 'c':
            fSkipSmall ^= 1;
            break;
        case 'u':
            fPrintMem ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) && fUseLutLib )
    {
        Abc_Print( -1, "Cannot print LUT delay for a non-logic network.\n" );
        return 1;
    }
    Abc_NtkPrintStats( pNtk, fFactor, fSaveBest, fDumpResult, fUseLutLib, fPrintMuxes, fPower, fGlitch, fSkipBuf, fSkipSmall, fPrintMem );
    if ( fPrintTime )
    {
        pAbc->TimeTotal += pAbc->TimeCommand;
        Abc_Print( 1, "elapse: %3.2f seconds, total: %3.2f seconds\n", pAbc->TimeCommand, pAbc->TimeTotal );
        pAbc->TimeCommand = 0.0;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: print_stats [-fbdltmpgscuh]\n" );
    Abc_Print( -2, "\t        prints the network statistics\n" );
    Abc_Print( -2, "\t-f    : toggles printing the literal count in the factored forms [default = %s]\n", fFactor? "yes": "no" );
    Abc_Print( -2, "\t-b    : toggles saving the best logic network in \"best.blif\" [default = %s]\n", fSaveBest? "yes": "no" );
    Abc_Print( -2, "\t-d    : toggles dumping statistics about the network into file [default = %s]\n", fDumpResult? "yes": "no" );
    Abc_Print( -2, "\t-l    : toggles printing delay of LUT mapping using LUT library [default = %s]\n", fSaveBest? "yes": "no" );
    Abc_Print( -2, "\t-t    : toggles printing runtime statistics [default = %s]\n", fPrintTime? "yes": "no" );
    Abc_Print( -2, "\t-m    : toggles printing MUX statistics [default = %s]\n", fPrintMuxes? "yes": "no" );
    Abc_Print( -2, "\t-p    : toggles printing power dissipation due to switching [default = %s]\n", fPower? "yes": "no" );
    Abc_Print( -2, "\t-g    : toggles printing percentage of increased power due to glitching [default = %s]\n", fGlitch? "yes": "no" );
    Abc_Print( -2, "\t-s    : toggles not counting single-output nodes as nodes [default = %s]\n", fSkipBuf? "yes": "no" );
    Abc_Print( -2, "\t-c    : toggles not counting constants and single-output nodes as nodes [default = %s]\n", fSkipSmall? "yes": "no" );
    Abc_Print( -2, "\t-u    : toggles printing memory usage [default = %s]\n", fPrintMem? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintExdc( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkTemp;
    double Percentage;
    int fShort;
    int c;
    int fPrintDc;
    extern double Abc_NtkSpacePercentage( Abc_Obj_t * pNode );
    pNtk = Abc_FrameReadNtk(pAbc);

    // set the defaults
    fShort  = 1;
    fPrintDc = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "sdh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fShort ^= 1;
            break;
        case 'd':
            fPrintDc ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( pNtk->pExdc == NULL )
    {
        Abc_Print( -1, "Network has no EXDC.\n" );
        return 1;
    }

    if ( fPrintDc )
    {
        if ( !Abc_NtkIsStrash(pNtk->pExdc) )
        {
            pNtkTemp = Abc_NtkStrash(pNtk->pExdc, 0, 0, 0);
            Percentage = Abc_NtkSpacePercentage( Abc_ObjChild0( Abc_NtkPo(pNtkTemp, 0) ) );
            Abc_NtkDelete( pNtkTemp );
        }
        else
            Percentage = Abc_NtkSpacePercentage( Abc_ObjChild0( Abc_NtkPo(pNtk->pExdc, 0) ) );

        Abc_Print( 1, "EXDC network statistics: " );
        Abc_Print( 1, "(" );
        if ( Percentage > 0.05 && Percentage < 99.95 )
            Abc_Print( 1, "%.2f", Percentage );
        else if ( Percentage > 0.000005 && Percentage < 99.999995 )
            Abc_Print( 1, "%.6f", Percentage );
        else
            Abc_Print( 1, "%f", Percentage );
        Abc_Print( 1, " %% don't-cares)\n" );
    }
    else
        Abc_Print( 1, "EXDC network statistics: \n" );
    Abc_NtkPrintStats( pNtk->pExdc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 );
    return 0;

usage:
    Abc_Print( -2, "usage: print_exdc [-dh]\n" );
    Abc_Print( -2, "\t        prints the EXDC network statistics\n" );
    Abc_Print( -2, "\t-d    : toggles printing don't-care percentage [default = %s]\n", fPrintDc? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintIo( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pNode;
    int c, fPrintFlops = 1;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "fh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'f':
            fPrintFlops ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }

    if ( argc == globalUtilOptind + 1 )
    {
        pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
        if ( pNode == NULL )
        {
            Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
            return 1;
        }
        Abc_NodePrintFanio( stdout, pNode );
        return 0;
    }
    // print the nodes
    Abc_NtkPrintIo( stdout, pNtk, fPrintFlops );
    return 0;

usage:
    Abc_Print( -2, "usage: print_io [-fh] <node>\n" );
    Abc_Print( -2, "\t        prints the PIs/POs/flops or fanins/fanouts of a node\n" );
    Abc_Print( -2, "\t-f    : toggles printing flops [default = %s]\n", fPrintFlops? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    Abc_Print( -2, "\tnode  : the node to print fanins/fanouts\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintLatch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fPrintSccs;
    extern void Abc_NtkPrintSccs( Abc_Ntk_t * pNtk, int fVerbose );

    // set defaults
    fPrintSccs = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "sh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fPrintSccs ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    // print the nodes
    Abc_NtkPrintLatch( stdout, pNtk );
    if ( fPrintSccs )
        Abc_NtkPrintSccs( pNtk, 0 );
    return 0;

usage:
    Abc_Print( -2, "usage: print_latch [-sh]\n" );
    Abc_Print( -2, "\t        prints information about latches\n" );
    Abc_Print( -2, "\t-s    : toggles printing SCCs of registers [default = %s]\n", fPrintSccs? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintFanio( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseFanio = 0;
    int fUsePio   = 0;
    int fUseSupp  = 0;
    int fUseCone  = 0;
    int fMffc     = 0;
    int fVerbose  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "fiscmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'f':
            fUseFanio ^= 1;
            break;
        case 'i':
            fUsePio ^= 1;
            break;
        case 's':
            fUseSupp ^= 1;
            break;
        case 'c':
            fUseCone ^= 1;
            break;
        case 'm':
            fMffc ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    // print the nodes
    if ( fMffc || !fVerbose )
        Abc_NtkPrintFanioNew( stdout, pNtk, fMffc );
    else
    {
        if ( fUseFanio + fUsePio + fUseSupp + fUseCone == 1 )
            Abc_NtkPrintFanio( stdout, pNtk, fUseFanio, fUsePio, fUseSupp, fUseCone );
        else
            printf( "Exactly one of the switches \"-f\", \"-i\", \"-s\", \"-c\" should be enabled.\n" );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: print_fanio [-fiscmvh]\n" );
    Abc_Print( -2, "\t        prints the statistics about different objects in the network\n" );
    Abc_Print( -2, "\t-f    : toggles considering fanins/fanouts of all nodes [default = %s]\n", fUseFanio? "yes": "no" );
    Abc_Print( -2, "\t-i    : toggles considering fanins/fanouts of CI/CO [default = %s]\n", fUsePio? "yes": "no" );
    Abc_Print( -2, "\t-s    : toggles considering TFO/TFI support sizes of CI/CO [default = %s]\n", fUseSupp? "yes": "no" );
    Abc_Print( -2, "\t-c    : toggles considering TFO/TFI cone sizes of CI/CO [default = %s]\n", fUseCone? "yes": "no" );
    Abc_Print( -2, "\t-m    : toggles printing MFFC sizes instead of fanouts [default = %s]\n", fMffc? "yes": "no" );
    Abc_Print( -2, "\t-v    : toggles verbose way of printing the stats [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintMffc( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    extern void Abc_NtkPrintMffc( FILE * pFile, Abc_Ntk_t * pNtk );

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // print the nodes
    Abc_NtkPrintMffc( stdout, pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: print_mffc [-h]\n" );
    Abc_Print( -2, "\t        prints the MFFC of each node in the network\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintFactor( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NodePrintSop( FILE * pFile, Abc_Obj_t * pNode, int fUseRealNames );
    extern void Abc_NtkPrintSop( FILE * pFile, Abc_Ntk_t * pNtk, int fUseRealNames );

    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pNode;
    int c, fSop = 0;
    int fUseRealNames;

    // set defaults
    fUseRealNames = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "snh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fSop ^= 1;
            break;
        case 'n':
            fUseRealNames ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Printing factored forms can be done for SOP networks.\n" );
        return 1;
    }

    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }

    if ( argc == globalUtilOptind + 1 )
    {
        pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
        if ( pNode == NULL )
        {
            Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
            return 1;
        }
        if ( fSop )
            Abc_NodePrintSop( stdout, pNode, fUseRealNames );
        else
            Abc_NodePrintFactor( stdout, pNode, fUseRealNames );
        return 0;
    }
    // print the nodes
    if ( fSop )
        Abc_NtkPrintSop( stdout, pNtk, fUseRealNames );
    else
        Abc_NtkPrintFactor( stdout, pNtk, fUseRealNames );
    return 0;

usage:
    Abc_Print( -2, "usage: print_factor [-snh] <node>\n" );
    Abc_Print( -2, "\t        prints the factored forms (FFs) of nodes\n" );
    Abc_Print( -2, "\t-s    : toggles printing SOP instead of FF [default = %s]\n", fSop? "SOP": "FF" );
    Abc_Print( -2, "\t-n    : toggles real/dummy fanin names [default = %s]\n", fUseRealNames? "real": "dummy" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    Abc_Print( -2, "\tnode  : (optional) one node to consider\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintLevel( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pNode;
    int c;
    int fListNodes;
    int fProfile;
    int fVerbose;

    // set defaults
    fListNodes = 0;
    fProfile   = 1;
    fVerbose   = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "npvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'n':
            fListNodes ^= 1;
            break;
        case 'p':
            fProfile ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !fProfile && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for AIGs (run \"strash\").\n" );
        return 1;
    }

    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }

    if ( argc == globalUtilOptind + 1 )
    {
        pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
        if ( pNode == NULL )
        {
            Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
            return 1;
        }
        Abc_NodePrintLevel( stdout, pNode );
        return 0;
    }
    // process all COs
    Abc_NtkPrintLevel( stdout, pNtk, fProfile, fListNodes, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: print_level [-npvh] <node>\n" );
    Abc_Print( -2, "\t        prints information about node level and cone size\n" );
    Abc_Print( -2, "\t-n    : toggles printing nodes by levels [default = %s]\n", fListNodes? "yes": "no" );
    Abc_Print( -2, "\t-p    : toggles printing level profile [default = %s]\n", fProfile? "yes": "no" );
    Abc_Print( -2, "\t-v    : enable verbose output [default = %s].\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    Abc_Print( -2, "\tnode  : (optional) one node to consider\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintSupport( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Vec_Ptr_t * vSuppFun;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fStruct;
    int fVerbose;
    int fVeryVerbose;
    extern Vec_Ptr_t * Sim_ComputeFunSupp( Abc_Ntk_t * pNtk, int fVerbose );
    extern void Abc_NtkPrintStrSupports( Abc_Ntk_t * pNtk, int fMatrix );

    // set defaults
    fStruct = 1;
    fVerbose = 0;
    fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "svwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fStruct ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // print support information
    if ( fStruct )
    {
        Abc_NtkPrintStrSupports( pNtk, fVeryVerbose );
        return 0;
    }

    if ( !Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "This command works only for combinational networks (run \"comb\").\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for AIGs (run \"strash\").\n" );
        return 1;
    }
    vSuppFun = Sim_ComputeFunSupp( pNtk, fVerbose );
    ABC_FREE( vSuppFun->pArray[0] );
    Vec_PtrFree( vSuppFun );
    return 0;

usage:
    Abc_Print( -2, "usage: print_supp [-svwh]\n" );
    Abc_Print( -2, "\t        prints the supports of the CO nodes\n" );
    Abc_Print( -2, "\t-s    : toggle printing structural support only [default = %s].\n", fStruct? "yes": "no" );
    Abc_Print( -2, "\t-v    : enable verbose output [default = %s].\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w    : enable printing CI/CO dependency matrix [default = %s].\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
#ifdef ABC_USE_CUDD
int Abc_CommandPrintMint( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pObj;
    int c;
    int fVerbose;

    // set defaults
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "svwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for logic networks (run \"clp\").\n" );
        return 1;
    }
    if ( !Abc_NtkHasBdd(pNtk) )
    {
        Abc_Print( -1, "This command works only for logic networks with local functions represented by BDDs.\n" );
        return 1;
    }

    Abc_NtkForEachNode( pNtk, pObj, c )
        printf( "ObjId %3d : SuppSize = %5d   MintCount = %32.0f\n", c, Abc_ObjFaninNum(pObj), 
            Cudd_CountMinterm((DdManager *)pNtk->pManFunc, (DdNode *)pObj->pData, Abc_ObjFaninNum(pObj)) );
    return 0;

usage:
    Abc_Print( -2, "usage: print_mint [-svwh]\n" );
    Abc_Print( -2, "\t        prints the number of on-set minterms in the PO functions\n" );
    Abc_Print( -2, "\t-v    : enable verbose output [default = %s].\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}
#endif

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintSymms( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseBdds;
    int fNaive;
    int fReorder;
    int fVerbose;
    extern void Abc_NtkSymmetries( Abc_Ntk_t * pNtk, int fUseBdds, int fNaive, int fReorder, int fVerbose );

    // set defaults
    fUseBdds = 0;
    fNaive   = 0;
    fReorder = 1;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bnrvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fUseBdds ^= 1;
            break;
        case 'n':
            fNaive ^= 1;
            break;
        case 'r':
            fReorder ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "This command works only for combinational networks (run \"comb\").\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
        Abc_NtkSymmetries( pNtk, fUseBdds, fNaive, fReorder, fVerbose );
    else
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        Abc_NtkSymmetries( pNtk, fUseBdds, fNaive, fReorder, fVerbose );
        Abc_NtkDelete( pNtk );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: print_symm [-bnrvh]\n" );
    Abc_Print( -2, "\t         computes symmetries of the PO functions\n" );
    Abc_Print( -2, "\t-b     : toggle BDD-based or SAT-based computations [default = %s].\n", fUseBdds? "BDD": "SAT" );
    Abc_Print( -2, "\t-n     : enable naive BDD-based computation [default = %s].\n", fNaive? "yes": "no" );
    Abc_Print( -2, "\t-r     : enable dynamic BDD variable reordering [default = %s].\n", fReorder? "yes": "no" );
    Abc_Print( -2, "\t-v     : enable verbose output [default = %s].\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintUnate( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseBdds;
    int fUseNaive;
    int fVerbose;
    extern void Abc_NtkPrintUnate( Abc_Ntk_t * pNtk, int fUseBdds, int fUseNaive, int fVerbose );

    // set defaults
    fUseBdds  = 1;
    fUseNaive = 0;
    fVerbose  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bnvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fUseBdds ^= 1;
            break;
        case 'n':
            fUseNaive ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for AIGs (run \"strash\").\n" );
        return 1;
    }
    Abc_NtkPrintUnate( pNtk, fUseBdds, fUseNaive, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: print_unate [-bnvh]\n" );
    Abc_Print( -2, "\t         computes unate variables of the PO functions\n" );
    Abc_Print( -2, "\t-b     : toggle BDD-based or SAT-based computations [default = %s].\n", fUseBdds? "BDD": "SAT" );
    Abc_Print( -2, "\t-n     : toggle naive BDD-based computation [default = %s].\n", fUseNaive? "yes": "no" );
    Abc_Print( -2, "\t-v     : enable verbose output [default = %s].\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintAuto( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int Output;
    int fNaive;
    int fVerbose;
    extern void Abc_NtkAutoPrint( Abc_Ntk_t * pNtk, int Output, int fNaive, int fVerbose );

    // set defaults
    Output   = -1;
    fNaive   = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Onvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            Output = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Output < 0 )
                goto usage;
            break;
        case 'n':
            fNaive ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for AIGs (run \"strash\").\n" );
        return 1;
    }


    Abc_NtkAutoPrint( pNtk, Output, fNaive, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: print_auto [-O <num>] [-nvh]\n" );
    Abc_Print( -2, "\t           computes autosymmetries of the PO functions\n" );
    Abc_Print( -2, "\t-O <num> : (optional) the 0-based number of the output [default = all]\n");
    Abc_Print( -2, "\t-n       : enable naive BDD-based computation [default = %s].\n", fNaive? "yes": "no" );
    Abc_Print( -2, "\t-v       : enable verbose output [default = %s].\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintKMap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pNode;
    int c;
    int fUseRealNames;

    extern void Abc_NodePrintKMap( Abc_Obj_t * pNode, int fUseRealNames );

    // set defaults
    fUseRealNames = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "nh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'n':
            fUseRealNames ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 2 )
    {
        Abc_NtkShow6VarFunc( argv[globalUtilOptind], argv[globalUtilOptind+1] );
        return 0;
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Visualization of Karnaugh maps works for logic networks.\n" );
        return 1;
    }
    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }
    if ( argc == globalUtilOptind )
    {
        pNode = Abc_ObjFanin0( Abc_NtkPo(pNtk, 0) );
        if ( !Abc_ObjIsNode(pNode) )
        {
            Abc_Print( -1, "The driver \"%s\" of the first PO is not an internal node.\n", Abc_ObjName(pNode) );
            return 1;
        }
    }
    else
    {
        pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
        if ( pNode == NULL )
        {
            Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
            return 1;
        }
    }
    Abc_NtkToBdd(pNtk);
    Abc_NodePrintKMap( pNode, fUseRealNames );
    return 0;

usage:
    Abc_Print( -2, "usage: print_kmap [-nh] <node>\n" );
    Abc_Print( -2, "\t        shows the truth table of the node\n" );
    Abc_Print( -2, "\t-n    : toggles real/dummy fanin names [default = %s]\n", fUseRealNames? "real": "dummy" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    Abc_Print( -2, "\t<node>: the node to consider (default = the driver of the first PO)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintGates( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseLibrary;
    int fUpdateProfile;

    extern void Abc_NtkPrintGates( Abc_Ntk_t * pNtk, int fUseLibrary, int fUpdateProfile );

    // set defaults
    fUseLibrary = 1;
    fUpdateProfile = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "luh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUseLibrary ^= 1;
            break;
        case 'u':
            fUpdateProfile ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkHasAig(pNtk) )
    {
        Abc_Print( -1, "Printing gates does not work for AIGs and sequential AIGs.\n" );
        return 1;
    }

    Abc_NtkPrintGates( pNtk, fUseLibrary, fUpdateProfile );
    return 0;

usage:
    Abc_Print( -2, "usage: print_gates [-luh]\n" );
    Abc_Print( -2, "\t        prints statistics about gates used in the network\n" );
    Abc_Print( -2, "\t-l    : used library gate names (if mapped) [default = %s]\n", fUseLibrary? "yes": "no" );
    Abc_Print( -2, "\t-u    : update profile before printing it[default = %s]\n", fUpdateProfile? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintSharing( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseLibrary;

    extern void Abc_NtkPrintSharing( Abc_Ntk_t * pNtk );

    // set defaults
    fUseLibrary = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUseLibrary ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    Abc_NtkPrintSharing( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: print_sharing [-h]\n" );
    Abc_Print( -2, "\t        prints the number of shared nodes in the TFI cones of the COs\n" );
//    Abc_Print( -2, "\t-l    : used library gate names (if mapped) [default = %s]\n", fUseLibrary? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintXCut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseLibrary;

    extern int Abc_NtkCrossCut( Abc_Ntk_t * pNtk );

    // set defaults
    fUseLibrary = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUseLibrary ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    Abc_NtkCrossCut( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: print_xcut [-h]\n" );
    Abc_Print( -2, "\t        prints the size of the cross cut of the current network\n" );
//    Abc_Print( -2, "\t-l    : used library gate names (if mapped) [default = %s]\n", fUseLibrary? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintDsd( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fCofactor;
    int nCofLevel;
    int fProfile;
    int fPrintDec;

    extern void Kit_DsdTest( unsigned * pTruth, int nVars );
    extern void Kit_DsdPrintCofactors( unsigned * pTruth, int nVars, int nCofLevel, int fVerbose );
    extern void Dau_DecTrySets( word * p, int nVars, int fVerbose );

    // set defaults
    nCofLevel = 1;
    fCofactor = 0;
    fProfile  = 0;
    fPrintDec = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Npcdh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nCofLevel = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCofLevel < 0 )
                goto usage;
            break;
        case 'p':
            fProfile ^= 1;
            break;
        case 'c':
            fCofactor ^= 1;
            break;
        case 'd':
            fPrintDec ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    // get the truth table of the first output
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Currently works only for logic networks.\n" );
        return 1;
    }
    Abc_NtkToAig( pNtk );
    // convert it to truth table
    {
        Abc_Obj_t * pObj = Abc_ObjFanin0( Abc_NtkPo(pNtk, 0) );
        Vec_Int_t * vMemory;
        unsigned * pTruth;
        if ( !Abc_ObjIsNode(pObj) )
        {
            Abc_Print( -1, "The fanin of the first PO node does not have a logic function.\n" );
            return 1;
        }
        if ( Abc_ObjFaninNum(pObj) > 16 )
        {
            Abc_Print( -1, "Currently works only for up to 16 inputs.\n" );
            return 1;
        }
        vMemory = Vec_IntAlloc(0);
        pTruth = Hop_ManConvertAigToTruth( (Hop_Man_t *)pNtk->pManFunc, Hop_Regular((Hop_Obj_t *)pObj->pData), Abc_ObjFaninNum(pObj), vMemory, 0 );
        if ( Hop_IsComplement((Hop_Obj_t *)pObj->pData) )
            Extra_TruthNot( pTruth, pTruth, Abc_ObjFaninNum(pObj) );
//        Extra_PrintBinary( stdout, pTruth, 1 << Abc_ObjFaninNum(pObj) );
//        Abc_Print( -1, "\n" );
        if ( fPrintDec )//&&Abc_ObjFaninNum(pObj) <= 6 )
        {
            word * pTruthW = (word *)pTruth;
            if ( Abc_ObjFaninNum(pObj) < 6 )
                pTruthW[0] = Abc_Tt6Stretch( pTruthW[0], Abc_ObjFaninNum(pObj) );
            Dau_DecTrySets( (word *)pTruth, Abc_ObjFaninNum(pObj), 1 );
        }
        if ( fProfile )
            Kit_TruthPrintProfile( pTruth, Abc_ObjFaninNum(pObj) );
        else if ( fCofactor )
            Kit_DsdPrintCofactors( pTruth, Abc_ObjFaninNum(pObj), nCofLevel, 1 );
        else
            Kit_DsdTest( pTruth, Abc_ObjFaninNum(pObj) );
        Vec_IntFree( vMemory );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: print_dsd [-pcdh] [-N <num>]\n" );
    Abc_Print( -2, "\t           print DSD formula for a single-output function with less than 16 variables\n" );
    Abc_Print( -2, "\t-p       : toggle printing profile [default = %s]\n", fProfile? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggle recursive cofactoring [default = %s]\n", fCofactor? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggle printing decompositions [default = %s]\n", fPrintDec? "yes": "no" );
    Abc_Print( -2, "\t-N <num> : the number of levels to cofactor [default = %d]\n", nCofLevel );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintCone( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseLibrary;

    // set defaults
    fUseLibrary = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUseLibrary ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 1;
    }
    Abc_NtkDarPrintCone( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: print_cone [-h]\n" );
    Abc_Print( -2, "\t        prints cones of influence info for each primary output\n" );
//    Abc_Print( -2, "\t-l    : used library gate names (if mapped) [default = %s]\n", fUseLibrary? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintMiter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseLibrary;

    extern void Abc_NtkPrintMiter( Abc_Ntk_t * pNtk );

    // set defaults
    fUseLibrary = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUseLibrary ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The network is should be structurally hashed.\n" );
        return 1;
    }
    Abc_NtkPrintMiter( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: print_miter [-h]\n" );
    Abc_Print( -2, "\t        prints the status of the miter\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintStatus( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkDumpOneCexSpecial( FILE * pFile, Abc_Ntk_t * pNtk, Abc_Cex_t * pCex );
    extern void Abc_NtkPrintPoEquivs( Abc_Ntk_t * pNtk );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c, fOutStatus = 0, fShort = 1;
    char * pLogFileName = NULL;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Losh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'o':
            fOutStatus ^= 1;
            break;
        case 's':
            fShort ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( fOutStatus )
    {
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Empty network.\n" );
            return 1;
        }
        Abc_NtkPrintPoEquivs( pNtk );
        return 0;
    }
    if ( !pAbc->vStatuses )
        Abc_Print( 1,"Status = %d  Frames = %d   ", pAbc->Status, pAbc->nFrames );
    if ( pAbc->pCex == NULL && pAbc->vCexVec == NULL )
        Abc_Print( 1,"Cex is not defined.\n" );
    else
    {
        if ( pAbc->pCex )
            Abc_CexPrintStats( pAbc->pCex );
        if ( pAbc->vCexVec )
        {
            Abc_Cex_t * pTemp;
            int nCexes = 0;
            int Counter = 0;
            //printf( "\n" );
            Vec_PtrForEachEntry( Abc_Cex_t *, pAbc->vCexVec, pTemp, c )
            {
                if ( pTemp == (void *)(ABC_PTRINT_T)1 )
                {
                    Counter++;
                    continue;
                }
                if ( pTemp )
                {
                    printf( "%4d : ", ++nCexes );
                    Abc_CexPrintStats( pTemp );
                }
            }
//            if ( Counter )
//                printf( "In total, %d (out of %d) outputs are \"sat\" but CEXes are not recorded.\n", Counter, Vec_PtrSize(pAbc->vCexVec) );
        }
    }
    if ( pAbc->vStatuses )
    {
        if ( pLogFileName )
        {
            Abc_Cex_t * pTemp = NULL;
            FILE * pFile = fopen( pLogFileName, "wb" );
            if ( pFile == NULL )
            {
                printf( "Cannot open file \"%s\" for writing.\n", pLogFileName );
                return 0;
            }
            Vec_PtrForEachEntry( Abc_Cex_t *, pAbc->vCexVec, pTemp, c )
            {
                int Status = Vec_IntEntry( pAbc->vStatuses, c );
                if ( Status == -1 ) // undec
                    fprintf( pFile, "STATUS: ABORTED " );
                else if ( Status == 0 )
                    fprintf( pFile, "STATUS: SAT " );
                else if ( Status == 1 )
                    fprintf( pFile, "STATUS: UNSAT " );
                fprintf( pFile, "%s\n", Abc_ObjName(Abc_NtkPo(pNtk, c)) );
                if ( Status != 0 )
                    continue;
                Abc_NtkDumpOneCexSpecial( pFile, pNtk, pTemp );
            }
            fclose( pFile );
        }
        else if ( fShort )
        {
            printf( "Status array contains %d SAT, %d UNSAT, and %d UNDEC entries (out of %d).",
                Vec_IntCountEntry(pAbc->vStatuses, 0), Vec_IntCountEntry(pAbc->vStatuses, 1),
                Vec_IntCountEntry(pAbc->vStatuses, -1), Vec_IntSize(pAbc->vStatuses) );
        }
        else
        {
            int i, Entry;
            Vec_IntForEachEntry( pAbc->vStatuses, Entry, i )
                printf( "%d=%d  ", i, Entry );
        }
        printf( "\n" );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: print_status [-L file] [-osh]\n" );
    Abc_Print( -2, "\t          prints verification status\n" );
    Abc_Print( -2, "\t-L file : the log file name [default = %s]\n",  pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-o      : toggle printing output status [default = %s]\n", fOutStatus? "yes": "no" );
    Abc_Print( -2, "\t-s      : toggle using short print-out [default = %s]\n", fShort? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPrintDelay( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pObjIn = NULL, * pObjOut = NULL;
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsMappedLogic(pNtk) )
    {
        Abc_Print( -1, "Delay trace works only for network mapped into standard cells.\n" );
        return 1;
    }
    if ( argc > globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }
    // collect the first name (PO name)
    if ( argc >= globalUtilOptind + 1 )
    {
        int Num = Nm_ManFindIdByName( pNtk->pManName, argv[globalUtilOptind], ABC_OBJ_PO );
        if ( Num < 0 )
            Num = Nm_ManFindIdByName( pNtk->pManName, argv[globalUtilOptind], ABC_OBJ_BI );
        if ( Num >= 0 )
            pObjOut = Abc_NtkObj( pNtk, Num );
        if ( pObjOut == NULL )
        {
            Abc_Print( 1, "Cannot find combinational output \"%s\".\n", argv[globalUtilOptind] );
            return 1;
        }
    }
    // collect the second name (PI name)
    if ( argc == globalUtilOptind + 2 )
    {
        int Num = Nm_ManFindIdByName( pNtk->pManName, argv[globalUtilOptind+1], ABC_OBJ_PI );
        if ( Num < 0 )
            Num = Nm_ManFindIdByName( pNtk->pManName, argv[globalUtilOptind+1], ABC_OBJ_BO );
        if ( Num >= 0 )
            pObjIn = Abc_NtkObj( pNtk, Num );
        if ( pObjIn == NULL )
        {
            Abc_Print( 1, "Cannot find combinational input \"%s\".\n", argv[globalUtilOptind+1] );
            return 1;
        }
    }
    Abc_NtkDelayTrace( pNtk, pObjOut, pObjIn, 1 );
    return 0;

usage:
    Abc_Print( -2, "usage: print_delay [-h] <CO_name> <CI_name>\n" );
    Abc_Print( -2, "\t            prints one critical path of the mapped network\n" );
    Abc_Print( -2, "\t-h        : print the command usage\n");
    Abc_Print( -2, "\t<CO_name> : (optional) the sink of the critical path (primary output or flop input)\n");
    Abc_Print( -2, "\t<CI_name> : (optional) the source of the critical path (primary input or flop output)\n");
    Abc_Print( -2, "\t            (if CO and/or CI are not given, uses the most critical ones)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandShow( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fSeq;
    int fGateNames;
    int fUseReverse;
    int fFlopDep;
    int fKeepDot;
    extern void Abc_NtkShow( Abc_Ntk_t * pNtk, int fGateNames, int fSeq, int fUseReverse, int fKeepDot );
    extern void Abc_NtkShowFlopDependency( Abc_Ntk_t * pNtk );

    // set defaults
    fSeq        = 0;
    fGateNames  = 0;
    fUseReverse = 1;
    fFlopDep    = 0;
    fKeepDot    = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "rsgfdh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'r':
            fUseReverse ^= 1;
            break;
        case 's':
            fSeq ^= 1;
            break;
        case 'g':
            fGateNames ^= 1;
            break;
        case 'f':
            fFlopDep ^= 1;
            break;
        case 'd':
            fKeepDot ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fFlopDep )
        Abc_NtkShowFlopDependency( pNtk );
    else
        Abc_NtkShow( pNtk, fGateNames, fSeq, fUseReverse, fKeepDot );
    return 0;

usage:
    Abc_Print( -2, "usage: show [-srgfdh]\n" );
    Abc_Print( -2, "       visualizes the network structure using DOT and GSVIEW\n" );
#ifdef WIN32
    Abc_Print( -2, "       \"dot.exe\" and \"gsview32.exe\" should be set in the paths\n" );
    Abc_Print( -2, "       (\"gsview32.exe\" may be in \"C:\\Program Files\\Ghostgum\\gsview\\\")\n" );
#endif
    Abc_Print( -2, "\t-s    : toggles visualization of sequential networks [default = %s].\n", fSeq? "yes": "no" );
    Abc_Print( -2, "\t-r    : toggles ordering nodes in reverse order [default = %s].\n", fUseReverse? "yes": "no" );
    Abc_Print( -2, "\t-g    : toggles printing gate names for mapped network [default = %s].\n", fGateNames? "yes": "no" );
    Abc_Print( -2, "\t-f    : toggles visualizing flop dependency graph [default = %s].\n", fFlopDep? "yes": "no" );
    Abc_Print( -2, "\t-d    : toggles keeping the .dot file used to produce the .ps file [default = %s].\n", fKeepDot? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandShowBdd( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pNode;
    int c, fCompl = 0, fGlobal = 0, fReorder = 1;
    extern void Abc_NodeShowBdd( Abc_Obj_t * pNode, int fCompl );
    extern void Abc_NtkShowBdd( Abc_Ntk_t * pNtk, int fCompl, int fReorder );

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "cgrh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fCompl ^= 1;
            break;
        case 'g':
            fGlobal ^= 1;
            break;
        case 'r':
            fReorder ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fGlobal )
    {
        Abc_Ntk_t * pTemp = Abc_NtkIsStrash(pNtk) ? pNtk : Abc_NtkStrash(pNtk, 0, 0, 0);
        Abc_NtkShowBdd( pTemp, fCompl, fReorder );
        if ( pTemp != pNtk )
            Abc_NtkDelete( pTemp );
        return 0;
    }

    if ( !Abc_NtkIsBddLogic(pNtk) )
    {
        Abc_Print( -1, "Visualizing BDDs can only be done for logic BDD networks (run \"bdd\").\n" );
        return 1;
    }
    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }
    if ( argc == globalUtilOptind )
    {
        pNode = Abc_ObjFanin0( Abc_NtkPo(pNtk, 0) );
        if ( !Abc_ObjIsNode(pNode) )
        {
            Abc_Print( -1, "The driver \"%s\" of the first PO is not an internal node.\n", Abc_ObjName(pNode) );
            return 1;
        }
    }
    else
    {
        pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
        if ( pNode == NULL )
        {
            Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
            return 1;
        }
    }
    Abc_NodeShowBdd( pNode, fCompl );
    return 0;

usage:
    Abc_Print( -2, "usage: show_bdd [-cgrh] <node>\n" );
    Abc_Print( -2, "       uses DOT and GSVIEW to visualize the global BDDs of primary outputs\n" );
    Abc_Print( -2, "       in terms of primary inputs or the local BDD of a node in terms of its fanins\n" );
#ifdef WIN32
    Abc_Print( -2, "       \"dot.exe\" and \"gsview32.exe\" should be set in the paths\n" );
    Abc_Print( -2, "       (\"gsview32.exe\" may be in \"C:\\Program Files\\Ghostgum\\gsview\\\")\n" );
#endif
    Abc_Print( -2, "\t<node>: (optional) the node to consider [default = the driver of the first PO]\n");
    Abc_Print( -2, "\t-c    : toggle visualizing BDD with complemented edges [default = %s].\n", fCompl? "yes": "no" );
    Abc_Print( -2, "\t-g    : toggle visualizing the global BDDs of primary outputs [default = %s].\n", fGlobal? "yes": "no" );
    Abc_Print( -2, "\t-r    : toggles dynamic variable reordering [default = %s]\n", fReorder? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandShowCut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pNode;
    int c;
    int nNodeSizeMax;
    int nConeSizeMax;
    extern void Abc_NodeShowCut( Abc_Obj_t * pNode, int nNodeSizeMax, int nConeSizeMax );

    // set defaults
    nNodeSizeMax = 10;
    nConeSizeMax = ABC_INFINITY;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NCh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodeSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodeSizeMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConeSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConeSizeMax < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Visualizing cuts only works for AIGs (run \"strash\").\n" );
        return 1;
    }
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }

    pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
    if ( pNode == NULL )
    {
        Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
        return 1;
    }
    Abc_NodeShowCut( pNode, nNodeSizeMax, nConeSizeMax );
    return 0;

usage:
    Abc_Print( -2, "usage: show_cut [-N <num>] [-C <num>] [-h] <node>\n" );
    Abc_Print( -2, "             visualizes the cut of a node using DOT and GSVIEW\n" );
#ifdef WIN32
    Abc_Print( -2, "             \"dot.exe\" and \"gsview32.exe\" should be set in the paths\n" );
    Abc_Print( -2, "             (\"gsview32.exe\" may be in \"C:\\Program Files\\Ghostgum\\gsview\\\")\n" );
#endif
    Abc_Print( -2, "\t-N <num> : the max size of the cut to be computed [default = %d]\n", nNodeSizeMax );
    Abc_Print( -2, "\t-C <num> : the max support of the containing cone [default = %d]\n", nConeSizeMax );
    Abc_Print( -2, "\t<node>   : the node to consider\n");
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCollapse( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fVerbose;
    int fBddSizeMax;
    int fDualRail;
    int fReorder;
    int fReverse;
    int fDumpOrder;
    int c;
    char * pLogFileName = NULL;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    fVerbose = 0;
    fReorder = 1;
    fReverse = 0;
    fDualRail = 0;
    fDumpOrder = 0;
    fBddSizeMax = ABC_INFINITY;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "BLrodxvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            fBddSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( fBddSizeMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            fReorder ^= 1;
            break;
        case 'o':
            fReverse ^= 1;
            break;
        case 'd':
            fDualRail ^= 1;
            break;
        case 'x':
            fDumpOrder ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Can only collapse a logic network or an AIG.\n" );
        return 1;
    }

    // get the new network
    if ( Abc_NtkIsStrash(pNtk) )
        pNtkRes = Abc_NtkCollapse( pNtk, fBddSizeMax, fDualRail, fReorder, fReverse, fDumpOrder, fVerbose );
    else
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        pNtkRes = Abc_NtkCollapse( pNtk, fBddSizeMax, fDualRail, fReorder, fReverse, fDumpOrder, fVerbose );
        Abc_NtkDelete( pNtk );
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Collapsing has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    if ( pLogFileName )
    {
        pAbc->pCex = NULL;
        pAbc->nFrames = -1;
        if ( Abc_NtkNodeNum(pNtkRes) == 0 ) 
            pAbc->Status =  1; // UNSAT
        else
            pAbc->Status = -1; // UNDEC
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "collapse" );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: collapse [-B <num>] [-L file] [-rodxvh]\n" );
    Abc_Print( -2, "\t          collapses the network by constructing global BDDs\n" );
    Abc_Print( -2, "\t-B <num>: limit on live BDD nodes during collapsing [default = %d]\n", fBddSizeMax );
    Abc_Print( -2, "\t-L file : the log file name [default = %s]\n",  pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-r      : toggles dynamic variable reordering [default = %s]\n", fReorder? "yes": "no" );
    Abc_Print( -2, "\t-o      : toggles reverse variable ordering [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-d      : toggles dual-rail collapsing mode [default = %s]\n", fDualRail? "yes": "no" );
    Abc_Print( -2, "\t-x      : toggles dumping file \"order.txt\" with variable order [default = %s]\n", fDumpOrder? "yes": "no" );
    Abc_Print( -2, "\t-v      : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSatClp( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkRes;
    int nCubeLim   =        0;
    int nBTLimit   =  1000000;
    int nCostMax   = 20000000;
    int fCanon     = 0;
    int fReverse   = 0;
    int fCnfShared = 0;
    int fVerbose   = 0;
    int c;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CLZcrsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCubeLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCubeLim < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimit < 0 )
                goto usage;
            break;
        case 'Z':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Z\" should be followed by an integer.\n" );
                goto usage;
            }
            nCostMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCostMax < 0 )
                goto usage;
            break;
        case 'c':
            fCanon ^= 1;
            break;
        case 'r':
            fReverse ^= 1;
            break;
        case 's':
            fCnfShared ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Can only collapse a logic network or an AIG.\n" );
        return 1;
    }

    // get the new network
    if ( Abc_NtkIsStrash(pNtk) )
        pNtkRes = Abc_NtkCollapseSat( pNtk, nCubeLim, nBTLimit, nCostMax, fCanon, fReverse, fCnfShared, fVerbose );
    else
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        pNtkRes = Abc_NtkCollapseSat( pNtk, nCubeLim, nBTLimit, nCostMax, fCanon, fReverse, fCnfShared, fVerbose );
        Abc_NtkDelete( pNtk );
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Collapsing has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: satclp [-CLZ num] [-crsvh]\n" );
    Abc_Print( -2, "\t         performs SAT based collapsing\n" );
    Abc_Print( -2, "\t-C num : the limit on the SOP size of one output [default = %d]\n",              nCubeLim );
    Abc_Print( -2, "\t-L num : the limit on the number of conflicts in one SAT call [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-Z num : the limit on the cost of the largest output [default = %d]\n",          nCostMax );
    Abc_Print( -2, "\t-c     : toggles using canonical ISOP computation [default = %s]\n",             fCanon? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggles using reverse veriable ordering [default = %s]\n",              fReverse? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggles shared CNF computation (non-canonical only) [default = %s]\n",  fCnfShared? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",                 fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandStrash( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Abc_Obj_t * pObj;
    int c;
    int fAllNodes;
    int fRecord;
    int fCleanup;
    int fComplOuts;
    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fAllNodes = 0;
    fCleanup  = 1;
    fRecord   = 0;
    fComplOuts= 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "acrih" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fAllNodes ^= 1;
            break;
        case 'c':
            fCleanup ^= 1;
            break;
        case 'r':
            fRecord ^= 1;
            break;
        case 'i':
            fComplOuts ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkStrash( pNtk, fAllNodes, fCleanup, fRecord );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Strashing has failed.\n" );
        return 1;
    }
    if ( fComplOuts )
    Abc_NtkForEachPo( pNtkRes, pObj, c )
        Abc_ObjXorFaninC( pObj, 0 );
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: strash [-acrih]\n" );
    Abc_Print( -2, "\t        transforms combinational logic into an AIG\n" );
    Abc_Print( -2, "\t-a    : toggles between using all nodes and DFS nodes [default = %s]\n", fAllNodes? "all": "DFS" );
    Abc_Print( -2, "\t-c    : toggles cleanup to remove the dagling AIG nodes [default = %s]\n", fCleanup? "all": "DFS" );
    Abc_Print( -2, "\t-r    : toggles using the record of AIG subgraphs [default = %s]\n", fRecord? "yes": "no" );
    Abc_Print( -2, "\t-i    : toggles complementing the POs of the AIG [default = %s]\n", fComplOuts? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBalance( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes, * pNtkTemp;
    int c;
    int fDuplicate;
    int fSelective;
    int fUpdateLevel;
    int fExor;
    int fVerbose;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    fDuplicate   = 0;
    fSelective   = 0;
    fUpdateLevel = 1;
    fExor        = 0;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ldsxvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'd':
            fDuplicate ^= 1;
            break;
        case 's':
            fSelective ^= 1;
            break;
        case 'x':
            fExor ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    // get the new network
    if ( Abc_NtkIsStrash(pNtk) )
    {
        if ( fExor )
            pNtkRes = Abc_NtkBalanceExor( pNtk, fUpdateLevel, fVerbose );
        else
            pNtkRes = Abc_NtkBalance( pNtk, fDuplicate, fSelective, fUpdateLevel );
    }
    else
    {
        pNtkTemp = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtkTemp == NULL )
        {
            Abc_Print( -1, "Strashing before balancing has failed.\n" );
            return 1;
        }
        if ( fExor )
            pNtkRes = Abc_NtkBalanceExor( pNtkTemp, fUpdateLevel, fVerbose );
        else
            pNtkRes = Abc_NtkBalance( pNtkTemp, fDuplicate, fSelective, fUpdateLevel );
        Abc_NtkDelete( pNtkTemp );
    }

    // check if balancing worked
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Balancing has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: balance [-ldsxvh]\n" );
    Abc_Print( -2, "\t        transforms the current network into a well-balanced AIG\n" );
    Abc_Print( -2, "\t-l    : toggle minimizing the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-d    : toggle duplication of logic [default = %s]\n", fDuplicate? "yes": "no" );
    Abc_Print( -2, "\t-s    : toggle duplication on the critical paths [default = %s]\n", fSelective? "yes": "no" );
    Abc_Print( -2, "\t-x    : toggle balancing multi-input EXORs [default = %s]\n", fExor? "yes": "no" );
    Abc_Print( -2, "\t-v    : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMuxStruct( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fVerbose;

    extern Abc_Ntk_t * Abc_NtkMuxRestructure( Abc_Ntk_t * pNtk, int fVerbose );
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    // get the new network
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Does not work for a logic network.\n" );
        return 1;
    }
    // check if balancing worked
//    pNtkRes = Abc_NtkMuxRestructure( pNtk, fVerbose );
    pNtkRes = NULL;
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "MUX restructuring has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: mux_struct [-vh]\n" );
    Abc_Print( -2, "\t        performs MUX restructuring of the current network\n" );
    Abc_Print( -2, "\t-v    : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMulti( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int nThresh, nFaninMax, c;
    int fCnf;
    int fMulti;
    int fSimple;
    int fFactor;
    extern Abc_Ntk_t * Abc_NtkMulti( Abc_Ntk_t * pNtk, int nThresh, int nFaninMax, int fCnf, int fMulti, int fSimple, int fFactor );

    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    nThresh   =  1;
    nFaninMax = 20;
    fCnf      =  0;
    fMulti    =  1;
    fSimple   =  0;
    fFactor   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "TFmcsfh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nThresh = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nThresh < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFaninMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFaninMax < 0 )
                goto usage;
            break;
        case 'c':
            fCnf ^= 1;
            break;
        case 'm':
            fMulti ^= 1;
            break;
        case 's':
            fSimple ^= 1;
            break;
        case 'f':
            fFactor ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Cannot renode a network that is not an AIG (run \"strash\").\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkMulti( pNtk, nThresh, nFaninMax, fCnf, fMulti, fSimple, fFactor );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Renoding has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: multi [-TF <num>] [-msfch]\n" );
    Abc_Print( -2, "\t          transforms an AIG into a logic network by creating larger nodes\n" );
    Abc_Print( -2, "\t-F <num>: the maximum fanin size after renoding [default = %d]\n", nFaninMax );
    Abc_Print( -2, "\t-T <num>: the threshold for AIG node duplication [default = %d]\n", nThresh );
    Abc_Print( -2, "\t          (an AIG node is the root of a new node after renoding\n" );
    Abc_Print( -2, "\t          if this leads to duplication of no more than %d AIG nodes,\n", nThresh );
    Abc_Print( -2, "\t          that is, if [(numFanouts(Node)-1) * size(MFFC(Node))] <= %d)\n", nThresh );
    Abc_Print( -2, "\t-m      : creates multi-input AND graph [default = %s]\n", fMulti? "yes": "no" );
    Abc_Print( -2, "\t-s      : creates a simple AIG (no renoding) [default = %s]\n", fSimple? "yes": "no" );
    Abc_Print( -2, "\t-f      : creates a factor-cut network [default = %s]\n", fFactor? "yes": "no" );
    Abc_Print( -2, "\t-c      : performs renoding to derive the CNF [default = %s]\n", fCnf? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRenode( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int nLutSize, nCutsMax, c;
    int nFlowIters, nAreaIters;
    int fArea;
    int fUseBdds;
    int fUseSops;
    int fUseCnfs;
    int fUseMv;
    int fVerbose;
    extern Abc_Ntk_t * Abc_NtkRenode( Abc_Ntk_t * pNtk, int nLutSize, int nCutsMax, int nFlowIters, int nAreaIters, int fArea, int fUseBdds, int fUseSops, int fUseCnfs, int fUseMv, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    nLutSize   =  8;
    nCutsMax   =  4;
    nFlowIters =  1;
    nAreaIters =  1;
    fArea      =  0;
    fUseBdds   =  0;
    fUseSops   =  0;
    fUseCnfs   =  0;
    fUseMv     =  0;
    fVerbose   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCFAabscivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutsMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nFlowIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFlowIters < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nAreaIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nAreaIters < 0 )
                goto usage;
            break;
        case 'a':
            fArea ^= 1;
            break;
        case 'b':
            fUseBdds ^= 1;
            break;
        case 's':
            fUseSops ^= 1;
            break;
        case 'c':
            fUseCnfs ^= 1;
            break;
        case 'i':
            fUseMv ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( fUseBdds + fUseSops + fUseCnfs + fUseMv > 1 )
    {
        Abc_Print( -1, "Cannot optimize two parameters at the same time.\n" );
        return 1;
    }

    if ( nLutSize < 2 || nLutSize > IF_MAX_FUNC_LUTSIZE )
    {
        Abc_Print( -1, "Incorrect LUT size (%d).\n", nLutSize );
        return 1;
    }

    if ( nCutsMax < 1 || nCutsMax >= (1<<12) )
    {
        Abc_Print( -1, "Incorrect number of cuts.\n" );
        return 1;
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Cannot renode a network that is not an AIG (run \"strash\").\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkRenode( pNtk, nLutSize, nCutsMax, nFlowIters, nAreaIters, fArea, fUseBdds, fUseSops, fUseCnfs, fUseMv, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Renoding has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: renode [-KCFA <num>] [-sbciav]\n" );
    Abc_Print( -2, "\t          transforms the AIG into a logic network with larger nodes\n" );
    Abc_Print( -2, "\t          while minimizing the number of FF literals of the node SOPs\n" );
    Abc_Print( -2, "\t-K <num>: the max cut size for renoding (2 < num < %d) [default = %d]\n", IF_MAX_FUNC_LUTSIZE+1, nLutSize );
    Abc_Print( -2, "\t-C <num>: the max number of cuts used at a node (0 < num < 2^12) [default = %d]\n", nCutsMax );
    Abc_Print( -2, "\t-F <num>: the number of area flow recovery iterations (num >= 0) [default = %d]\n", nFlowIters );
    Abc_Print( -2, "\t-A <num>: the number of exact area recovery iterations (num >= 0) [default = %d]\n", nAreaIters );
    Abc_Print( -2, "\t-s      : toggles minimizing SOP cubes instead of FF lits [default = %s]\n", fUseSops? "yes": "no" );
    Abc_Print( -2, "\t-b      : toggles minimizing BDD nodes instead of FF lits [default = %s]\n", fUseBdds? "yes": "no" );
    Abc_Print( -2, "\t-c      : toggles minimizing CNF clauses instead of FF lits [default = %s]\n", fUseCnfs? "yes": "no" );
    Abc_Print( -2, "\t-i      : toggles minimizing MV-SOP instead of FF lits [default = %s]\n", fUseMv? "yes": "no" );
    Abc_Print( -2, "\t-a      : toggles area-oriented mapping [default = %s]\n", fArea? "yes": "no" );
    Abc_Print( -2, "\t-v      : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCleanup( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fCleanupPis;
    int fCleanupPos;
    int fVerbose;

    extern Abc_Ntk_t * Abc_NtkDarCleanupAig( Abc_Ntk_t * pNtk, int fCleanupPis, int fCleanupPos, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    fCleanupPis = 1;
    fCleanupPos = 1;
    fVerbose    = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "iovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'i':
            fCleanupPis ^= 1;
            break;
        case 'o':
            fCleanupPos ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
    {
        if ( !fCleanupPis && !fCleanupPos )
        {
            Abc_Print( -1, "Cleanup for PIs and POs is not enabled.\n" );
            pNtkRes = Abc_NtkDup( pNtk );
        }
        else
            pNtkRes = Abc_NtkDarCleanupAig( pNtk, fCleanupPis, fCleanupPos, fVerbose );
    }
    else
    {
        Abc_NtkCleanup( pNtk, fVerbose );
        pNtkRes = Abc_NtkDup( pNtk );
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Cleanup has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: cleanup [-iovh]\n" );
    Abc_Print( -2, "\t        for logic networks, removes dangling combinatinal logic\n" );
    Abc_Print( -2, "\t        for AIGs, removes PIs w/o fanout and POs driven by const-0\n" );
    Abc_Print( -2, "\t-i    : toggles removing PIs without fanout [default = %s]\n", fCleanupPis? "yes": "no" );
    Abc_Print( -2, "\t-o    : toggles removing POs with const-0 drivers [default = %s]\n", fCleanupPos? "yes": "no" );
    Abc_Print( -2, "\t-v    : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSweep( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fSingle = 0;
    int fVerbose = 0;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "svh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fSingle ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "The classical (SIS-like) sweep can only be performed on a logic network.\n" );
        return 1;
    }
    // modify the current network
    if ( fSingle )
        Abc_NtkSweepBufsInvs( pNtk, fVerbose );
    else
        Abc_NtkSweep( pNtk, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: sweep [-svh]\n" );
    Abc_Print( -2, "\t        removes dangling nodes; propagates constant, buffers, inverters\n" );
    Abc_Print( -2, "\t-s    : toggle sweeping buffers/inverters only [default = %s]\n", fSingle? "yes": "no" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFastExtract( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_NtkFxPerform( Abc_Ntk_t * pNtk, int nNewNodesMax, int nLitCountMax, int fCanonDivs, int fVerbose, int fVeryVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Fxu_Data_t Params, * p = &Params;
    int c, fNewAlgo = 1;
    int nPairsLimit = 1000000000;
    // set the defaults
    Abc_NtkSetDefaultFxParams( p );
    Extra_UtilGetoptReset();
    while ( (c = Extra_UtilGetopt(argc, argv, "SDNWMPsdzcnxvwh")) != EOF )
    {
        switch (c)
        {
            case 'S':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                    goto usage;
                }
                p->nSingleMax = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( p->nSingleMax < 0 )
                    goto usage;
                break;
            case 'D':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                    goto usage;
                }
                p->nPairsMax = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( p->nPairsMax < 0 )
                    goto usage;
                break;
            case 'N':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                    goto usage;
                }
                p->nNodesExt = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( p->nNodesExt < 0 )
                    goto usage;
                break;
            case 'W':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                    goto usage;
                }
                p->WeightMin = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( p->WeightMin < 0 )
                    goto usage;
                break;
            case 'M':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                    goto usage;
                }
                p->LitCountMax = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( p->LitCountMax < 0 )
                    goto usage;
                break;
            case 'P':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                    goto usage;
                }
                nPairsLimit = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( nPairsLimit < 0 )
                    goto usage;
                break;
            case 's':
                p->fOnlyS ^= 1;
                break;
            case 'd':
                p->fOnlyD ^= 1;
                break;
            case 'z':
                p->fUse0 ^= 1;
                break;
            case 'c':
                p->fUseCompl ^= 1;
                break;
            case 'n':
                fNewAlgo ^= 1;
                break;
            case 'x':
                p->fCanonDivs ^= 1;
                break;
            case 'v':
                p->fVerbose ^= 1;
                break;
            case 'w':
                p->fVeryVerbose ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkNodeNum(pNtk) == 0 || Abc_NtkPiNum(pNtk) == 0 )
    {
        Abc_Print( 0, "The network does not have internal nodes.\n" );
        return 0;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Fast extract can only be applied to a logic network (run \"renode\" or \"if\").\n" );
        return 1;
    }
    if ( !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Fast extract can only be applied to a logic network with SOP local functions (run \"bdd; sop\").\n" );
        return 1;
    }
    if ( Abc_NtkGetCubePairNum(pNtk) > nPairsLimit )
    {
        Abc_Print( -1, "Cannot perform \"fx\" because the number cube pairs exceeds the limit (%d).\n", nPairsLimit );
        return 1;
    }

    // the nodes to be merged are linked into the special linked list
    if ( fNewAlgo )
        Abc_NtkFxPerform( pNtk, p->nNodesExt, p->LitCountMax, p->fCanonDivs, p->fVerbose, p->fVeryVerbose );
    else
        Abc_NtkFastExtract( pNtk, p );
    Abc_NtkFxuFreeInfo( p );
    return 0;

usage:
    Abc_Print( -2, "usage: fx [-SDNWMP <num>] [-sdzcnxvwh]\n");
    Abc_Print( -2, "\t           performs unate fast extract on the current network\n");
    Abc_Print( -2, "\t-S <num> : max number of single-cube divisors to consider [default = %d]\n", p->nSingleMax );
    Abc_Print( -2, "\t-D <num> : max number of double-cube divisors to consider [default = %d]\n", p->nPairsMax );
    Abc_Print( -2, "\t-N <num> : max number of divisors to extract during this run [default = %d]\n", p->nNodesExt );
    Abc_Print( -2, "\t-W <num> : lower bound on the weight of divisors to extract [default = %d]\n", p->WeightMin );
    Abc_Print( -2, "\t-M <num> : upper bound on literal count of divisors to extract [default = %d]\n", p->LitCountMax );
    Abc_Print( -2, "\t-P <num> : skip \"fx\" if cube pair count exceeds this limit [default = %d]\n", nPairsLimit );
    Abc_Print( -2, "\t-s       : use only single-cube divisors [default = %s]\n", p->fOnlyS? "yes": "no" );
    Abc_Print( -2, "\t-d       : use only double-cube divisors [default = %s]\n", p->fOnlyD? "yes": "no" );
    Abc_Print( -2, "\t-z       : use zero-weight divisors [default = %s]\n", p->fUse0? "yes": "no" );
    Abc_Print( -2, "\t-c       : use complement in the binary case [default = %s]\n", p->fUseCompl? "yes": "no" );
    Abc_Print( -2, "\t-n       : use new implementation of fast extract [default = %s]\n", fNewAlgo? "yes": "no" );
    Abc_Print( -2, "\t-x       : use only canonical divisors (AND, XOR, MUX) [default = %s]\n", p->fCanonDivs? "yes": "no" );
    Abc_Print( -2, "\t-v       : print verbose information [default = %s]\n", p->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : print additional information [default = %s]\n", p->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
static int Abc_CommandFxch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_NtkFxchPerform( Abc_Ntk_t * pNtk, int nMaxDivExt, int fVerbose, int fVeryVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);

    int c,
        nMaxDivExt = 0,
        fVerbose = 0,
        fVeryVerbose = 0;

    Extra_UtilGetoptReset();
    while ( (c = Extra_UtilGetopt(argc, argv, "Nvwh")) != EOF )
    {
        switch (c)
        {
            case 'N':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                    goto usage;
                }
                nMaxDivExt = atoi( argv[globalUtilOptind] );
                globalUtilOptind++;

                if ( nMaxDivExt < 0 )
                    goto usage;
                break;

            case 'v':
                fVerbose ^= 1;
                break;

            case 'w':
                fVeryVerbose ^= 1;
                break;

            case 'h':
                goto usage;
                break;

            default:
                goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkNodeNum( pNtk ) == 0 )
    {
        Abc_Print( -1, "The network does not have internal nodes.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic( pNtk ) )
    {
        Abc_Print( -1, "Fast extract can only be applied to a logic network (run \"renode\" or \"if\").\n" );
        return 1;
    }
    if ( !Abc_NtkIsSopLogic( pNtk ) )
    {
        Abc_Print( -1, "Fast extract can only be applied to a logic network with SOP local functions (run \"bdd; sop\").\n" );
        return 1;
    }

    Abc_NtkFxchPerform( pNtk, nMaxDivExt, fVerbose, fVeryVerbose );

    return 0;

usage:
    Abc_Print( -2, "usage: fxch [-N <num>] [-svwh]\n");
    Abc_Print( -2, "\t           performs fast extract with cube hashing on the current network\n");
    Abc_Print( -2, "\t-N <num> : max number of divisors to extract during this run [default = unused]\n" );
    Abc_Print( -2, "\t-v       : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : print additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t           This command was contributed by Bruno Schmitt from UFRGS in May 2016.\n" );
    Abc_Print( -2, "\t           The author can be contacted as boschmitt at inf.ufrgs.br\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandEliminate( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int ElimValue;
    int nMaxSize;
    int nIterMax;
    int fGreedy;
    int fReverse;
    int fSpecial;
    int fVerbose;
    int c;
    extern int Abc_NtkEliminate( Abc_Ntk_t * pNtk, int nMaxSize, int fReverse, int fVerbose );
    extern int Abc_NtkEliminate1( Abc_Ntk_t * pNtk, int ElimValue, int nMaxSize, int nIterMax, int fReverse, int fVerbose );
    extern int Abc_NtkEliminateSpecial( Abc_Ntk_t * pNtk, int nMaxSize, int fVerbose );

    // set the defaults
    ElimValue = -1;
    nMaxSize  = 12;
    nIterMax  =  1;
    fGreedy   =  0;
    fReverse  =  0;
    fSpecial  =  0;
    fVerbose  =  0;
    Extra_UtilGetoptReset();
    while ( (c = Extra_UtilGetopt(argc, argv, "VNIgrsvh")) != EOF )
    {
        switch (c)
        {
            case 'V':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer that is -1 or larger.\n" );
                    goto usage;
                }
                ElimValue = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( ElimValue < -1 )
                    goto usage;
                break;
            case 'N':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                    goto usage;
                }
                nMaxSize = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( nMaxSize <= 0 )
                    goto usage;
                break;
            case 'I':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                    goto usage;
                }
                nIterMax = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( nIterMax <= 0 )
                    goto usage;
                break;
            case 'g':
                fGreedy ^= 1;
                break;
            case 'r':
                fReverse ^= 1;
                break;
            case 's':
                fSpecial ^= 1;
                break;
            case 'v':
                fVerbose ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkNodeNum(pNtk) == 0 )
    {
        Abc_Print( -1, "The network does not have internal nodes.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network (run \"renode\" or \"if\").\n" );
        return 1;
    }

    if ( fSpecial )
        Abc_NtkEliminateSpecial( pNtk, 1000, fVerbose );
    else if ( fGreedy )
        Abc_NtkEliminate( pNtk, nMaxSize, fReverse, fVerbose );
    else
        Abc_NtkEliminate1( pNtk, ElimValue, nMaxSize, nIterMax, fReverse, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: eliminate [-VNI <num>] [-grsvh]\n");
    Abc_Print( -2, "\t           traditional \"eliminate -1\", which collapses the node into its fanout\n");
    Abc_Print( -2, "\t           if the node's variable appears in the fanout's factored form only once\n");
    Abc_Print( -2, "\t-V <num> : the \"value\" parameter used by \"eliminate\" in SIS [default = %d]\n", ElimValue );
    Abc_Print( -2, "\t-N <num> : the maximum node support after collapsing [default = %d]\n", nMaxSize );
    Abc_Print( -2, "\t-I <num> : the maximum number of iterations [default = %d]\n", nIterMax );
    Abc_Print( -2, "\t-g       : toggle using greedy eliminate (without \"value\") [default = %s]\n", fGreedy? "yes": "no" );
    Abc_Print( -2, "\t-r       : use the reverse topological order [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggle eliminating similar nodes [default = %s]\n", fSpecial? "yes": "no" );
    Abc_Print( -2, "\t-v       : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDisjoint( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes, * pNtkNew;
    int fGlobal, fRecursive, fVerbose, fPrint, fShort, c;

    extern Abc_Ntk_t * Abc_NtkDsdGlobal( Abc_Ntk_t * pNtk, int fVerbose, int fPrint, int fShort );
    extern int         Abc_NtkDsdLocal( Abc_Ntk_t * pNtk, int fVerbose, int fRecursive );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fGlobal    = 1;
    fRecursive = 0;
    fVerbose   = 0;
    fPrint     = 0;
    fShort     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "grvpsh" ) ) != EOF )
    {
        switch ( c )
        {
            case 'g':
                fGlobal ^= 1;
                break;
            case 'r':
                fRecursive ^= 1;
                break;
            case 'v':
                fVerbose ^= 1;
                break;
            case 'p':
                fPrint ^= 1;
                break;
            case 's':
                fShort ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fGlobal )
    {
//        Abc_Print( 0, "Performing DSD of global functions of the network.\n" );
        // get the new network
        if ( !Abc_NtkIsStrash(pNtk) )
        {
            pNtkNew = Abc_NtkStrash( pNtk, 0, 0, 0 );
            pNtkRes = Abc_NtkDsdGlobal( pNtkNew, fVerbose, fPrint, fShort );
            Abc_NtkDelete( pNtkNew );
        }
        else
        {
            pNtkRes = Abc_NtkDsdGlobal( pNtk, fVerbose, fPrint, fShort );
        }
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "Global DSD has failed.\n" );
            return 1;
        }
        // replace the current network
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    }
    else if ( fRecursive )
    {
        if ( !Abc_NtkIsBddLogic( pNtk ) )
        {
            Abc_Print( -1, "This command is only applicable to logic BDD networks.\n" );
            return 1;
        }
        if ( fVerbose )
            Abc_Print( 1, "Performing recursive DSD and MUX decomposition of local functions.\n" );
        if ( !Abc_NtkDsdLocal( pNtk, fVerbose, fRecursive ) )
            Abc_Print( -1, "Recursive DSD has failed.\n" );
    }
    else
    {
        if ( !Abc_NtkIsBddLogic( pNtk ) )
        {
            Abc_Print( -1, "This command is only applicable to logic BDD networks (run \"bdd\").\n" );
            return 1;
        }
        if ( fVerbose )
            Abc_Print( 1, "Performing simple non-recursive DSD of local functions.\n" );
        if ( !Abc_NtkDsdLocal( pNtk, fVerbose, fRecursive ) )
            Abc_Print( -1, "Simple DSD of local functions has failed.\n" );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dsd [-grvpsh]\n" );
    Abc_Print( -2, "\t     decomposes the network using disjoint-support decomposition\n" );
    Abc_Print( -2, "\t-g     : toggle DSD of global and local functions [default = %s]\n", fGlobal? "global": "local" );
    Abc_Print( -2, "\t-r     : toggle recursive DSD/MUX and simple DSD [default = %s]\n", fRecursive? "recursive DSD/MUX": "simple DSD" );
    Abc_Print( -2, "\t-v     : prints DSD statistics and runtime [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-p     : prints DSD structure to the standard output [default = %s]\n", fPrint? "yes": "no" );
    Abc_Print( -2, "\t-s     : use short PI names when printing DSD structure [default = %s]\n", fShort? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSparsify( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkSparsify( Abc_Ntk_t * pNtk, int nPerc, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkNew;
    int nPerc, fVerbose, c;
    // set defaults
    nPerc      = 10;
    fVerbose   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
            case 'N':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                    goto usage;
                }
                nPerc = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( nPerc < 1 || nPerc > 100 )
                    goto usage;
                break;
            case 'v':
                fVerbose ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsBddLogic( pNtk ) )
    {
        Abc_Print( -1, "This command is only applicable to logic BDD networks (run \"bdd\").\n" );
        return 1;
    }
    if ( Abc_NtkCiNum(pNtk) > 16 )
    {
        Abc_Print( -1, "The number of primary inputs is more than 16.\n" );
        return 1;
    }
    pNtkNew = Abc_NtkSparsify( pNtk, nPerc, fVerbose );
    if ( pNtkNew == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkNew );
    return 0;

usage:
    Abc_Print( -2, "usage: sparsify [-N num] [-vh]\n" );
    Abc_Print( -2, "\t           creates incompletely-specified function\n" );
    Abc_Print( -2, "\t-N <num> : the percentage of on-set and off-set minterms (1 <= num <= 100) [default = %d]\n", nPerc );
    Abc_Print( -2, "\t-v       : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandLutpack( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Lpk_Par_t Pars, * pPars = &Pars;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    memset( pPars, 0, sizeof(Lpk_Par_t) );
    pPars->nLutsMax     =  4; // (N) the maximum number of LUTs in the structure
    pPars->nLutsOver    =  3; // (Q) the maximum number of LUTs not in the MFFC
    pPars->nVarsShared  =  0; // (S) the maximum number of shared variables (crossbars)
    pPars->nGrowthLevel =  0; // (L) the maximum number of increased levels
    pPars->fSatur       =  1;
    pPars->fZeroCost    =  0;
    pPars->fFirst       =  0;
    pPars->fOldAlgo     =  0;
    pPars->fVerbose     =  0;
    pPars->fVeryVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NQSLszfovwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutsMax < 2 || pPars->nLutsMax > 16 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLutsOver = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutsOver < 0 || pPars->nLutsOver > 8 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nVarsShared = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVarsShared < 0 || pPars->nVarsShared > 4 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nGrowthLevel = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGrowthLevel < 0 || pPars->nGrowthLevel > ABC_INFINITY )
                goto usage;
            break;
        case 's':
            pPars->fSatur ^= 1;
            break;
        case 'z':
            pPars->fZeroCost ^= 1;
            break;
        case 'f':
            pPars->fFirst ^= 1;
            break;
        case 'o':
            pPars->fOldAlgo ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }
    if ( pPars->nVarsShared < 0 || pPars->nVarsShared > 3 )
    {
        Abc_Print( -1, "The number of shared variables (%d) is not in the range 0 <= S <= 3.\n", pPars->nVarsShared );
        return 1;
    }

    // modify the current network
    if ( !Lpk_Resynthesize( pNtk, pPars ) )
    {
        Abc_Print( -1, "Resynthesis has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: lutpack [-NQSL <num>] [-szfovwh]\n" );
    Abc_Print( -2, "\t           performs \"rewriting\" for LUT network;\n" );
    Abc_Print( -2, "\t           determines LUT size as the max fanin count of a node;\n" );
    Abc_Print( -2, "\t           if the network is not LUT-mapped, packs it into 6-LUTs\n" );
    Abc_Print( -2, "\t           (there is another command for resynthesis after LUT mapping, \"mfs2\")\n" );
    Abc_Print( -2, "\t-N <num> : the max number of LUTs in the structure (2 <= num) [default = %d]\n", pPars->nLutsMax );
    Abc_Print( -2, "\t-Q <num> : the max number of LUTs not in MFFC (0 <= num) [default = %d]\n", pPars->nLutsOver );
    Abc_Print( -2, "\t-S <num> : the max number of LUT inputs shared (0 <= num <= 3) [default = %d]\n", pPars->nVarsShared );
    Abc_Print( -2, "\t-L <num> : max level increase after resynthesis (0 <= num) [default = %d]\n", pPars->nGrowthLevel );
    Abc_Print( -2, "\t-s       : toggle iteration till saturation [default = %s]\n", pPars->fSatur? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggle zero-cost replacements [default = %s]\n", pPars->fZeroCost? "yes": "no" );
    Abc_Print( -2, "\t-f       : toggle using only first node and first cut [default = %s]\n", pPars->fFirst? "yes": "no" );
    Abc_Print( -2, "\t-o       : toggle using old implementation [default = %s]\n", pPars->fOldAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle detailed printout of decomposed functions [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandLutmin( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int nLutSize;
    int fVerbose;
    extern Abc_Ntk_t * Abc_NtkLutmin( Abc_Ntk_t * pNtk, int nLutSize, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nLutSize = 4;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Kvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    // modify the current network
    pNtkRes = Abc_NtkLutmin( pNtk, nLutSize, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "The command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: lutmin [-K <num>] [-vh]\n" );
    Abc_Print( -2, "\t           perform FPGA mapping while minimizing the LUT count\n" );
    Abc_Print( -2, "\t           as described in the paper T. Sasao and A. Mishchenko:\n" );
    Abc_Print( -2, "\t           \"On the number of LUTs to implement logic functions\".\n" );
    Abc_Print( -2, "\t-K <num> : the LUT size to use for the mapping (2 <= num) [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

#if 0

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandImfs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Res_Par_t Pars, * pPars = &Pars;
    int c;

    // set defaults
    pPars->nWindow      = 62;
    pPars->nCands       =  5;
    pPars->nSimWords    =  4;
    pPars->nGrowthLevel =  0;
    pPars->fArea        =  0;
    pPars->fVerbose     =  0;
    pPars->fVeryVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WSCLavwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWindow = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWindow < 1 || pPars->nWindow > 99 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSimWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSimWords < 1 || pPars->nSimWords > 256 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCands = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCands < 0 || pPars->nCands > ABC_INFINITY )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nGrowthLevel = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGrowthLevel < 0 || pPars->nGrowthLevel > ABC_INFINITY )
                goto usage;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }

    // modify the current network
    if ( !Abc_NtkResynthesize( pNtk, pPars ) )
    {
        Abc_Print( -1, "Resynthesis has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: imfs [-W <NM>] [-LCS <num>] [-avwh]\n" );
    Abc_Print( -2, "\t           performs resubstitution-based resynthesis with interpolation\n" );
    Abc_Print( -2, "\t           (there is another command for resynthesis after LUT mapping, \"lutpack\")\n" );
    Abc_Print( -2, "\t-W <NM>  : fanin/fanout levels (NxM) of the window (00 <= NM <= 99) [default = %d%d]\n", pPars->nWindow/10, pPars->nWindow%10 );
    Abc_Print( -2, "\t-C <num> : the max number of resub candidates (1 <= n) [default = %d]\n", pPars->nCands );
    Abc_Print( -2, "\t-S <num> : the number of simulation words (1 <= n <= 256) [default = %d]\n", pPars->nSimWords );
    Abc_Print( -2, "\t-L <num> : the max increase in node level after resynthesis (0 <= num) [default = %d]\n", pPars->nGrowthLevel );
    Abc_Print( -2, "\t-a       : toggle optimization for area only [default = %s]\n", pPars->fArea? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printout subgraph statistics [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

#endif

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMfs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Mfs_Par_t Pars, * pPars = &Pars;
    int c;
    // set defaults
    Abc_NtkMfsParsDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WFDMLCdraestpgvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWinTfoLevs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWinTfoLevs < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFanoutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFanoutsMax < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nDepthMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDepthMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWinMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWinMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nGrowthLevel = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGrowthLevel < 0 || pPars->nGrowthLevel > ABC_INFINITY )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'd':
            pPars->fRrOnly ^= 1;
            break;
        case 'r':
            pPars->fResub ^= 1;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'e':
            pPars->fMoreEffort ^= 1;
            break;
        case 's':
            pPars->fSwapEdge ^= 1;
            break;
        case 't':
            pPars->fOneHotness ^= 1;
            break;
        case 'p':
            pPars->fPower ^= 1;
            break;
        case 'g':
            pPars->fGiaSat ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }

    // modify the current network
    if ( !Abc_NtkMfs( pNtk, pPars ) )
    {
        Abc_Print( -1, "Resynthesis has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: mfs [-WFDMLC <num>] [-draestpgvh]\n" );
    Abc_Print( -2, "\t           performs don't-care-based optimization of logic networks\n" );
    Abc_Print( -2, "\t-W <num> : the number of levels in the TFO cone (0 <= num) [default = %d]\n", pPars->nWinTfoLevs );
    Abc_Print( -2, "\t-F <num> : the max number of fanouts to skip (1 <= num) [default = %d]\n", pPars->nFanoutsMax );
    Abc_Print( -2, "\t-D <num> : the max depth nodes to try (0 = no limit) [default = %d]\n", pPars->nDepthMax );
    Abc_Print( -2, "\t-M <num> : the max node count of windows to consider (0 = no limit) [default = %d]\n", pPars->nWinMax );
    Abc_Print( -2, "\t-L <num> : the max increase in node level after resynthesis (0 <= num) [default = %d]\n", pPars->nGrowthLevel );
    Abc_Print( -2, "\t-C <num> : the max number of conflicts in one SAT run (0 = no limit) [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-d       : toggle performing redundancy removal [default = %s]\n", pPars->fRrOnly? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggle resubstitution and dc-minimization [default = %s]\n", pPars->fResub? "resub": "dc-min" );
    Abc_Print( -2, "\t-a       : toggle minimizing area or area+edges [default = %s]\n", pPars->fArea? "area": "area+edges" );
    Abc_Print( -2, "\t-e       : toggle high-effort resubstitution [default = %s]\n", pPars->fMoreEffort? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggle evaluation of edge swapping [default = %s]\n", pPars->fSwapEdge? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggle using artificial one-hotness conditions [default = %s]\n", pPars->fOneHotness? "yes": "no" );
    Abc_Print( -2, "\t-p       : toggle power-aware optimization [default = %s]\n", pPars->fPower? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggle using new SAT solver [default = %s]\n", pPars->fGiaSat? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMfs2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_NtkPerformMfs( Abc_Ntk_t * pNtk, Sfm_Par_t * pPars );
    extern int Abc_NtkMfsAfterICheck( Abc_Ntk_t * p, int nFrames, int nFramesAdd, Vec_Int_t * vFlops, Sfm_Par_t * pPars );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Sfm_Par_t Pars, * pPars = &Pars;
    int c, fIndDCs = 0, fUseAllFfs = 0, nFramesAdd = 0;
    // set defaults
    Sfm_ParSetDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WFDMLCZNIdaeijlvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfoLevMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfoLevMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFanoutMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFanoutMax < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nDepthMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDepthMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWinSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWinSizeMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nGrowthLevel = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGrowthLevel < -ABC_INFINITY || pPars->nGrowthLevel > ABC_INFINITY )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'Z':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Z\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFirstFixed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFirstFixed < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNodesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNodesMax < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nFramesAdd = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFramesAdd < 0 )
                goto usage;
            break;
        case 'd':
            pPars->fRrOnly ^= 1;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'e':
            pPars->fMoreEffort ^= 1;
            break;
        case 'i':
            fIndDCs ^= 1;
            break;
        case 'j':
            fUseAllFfs ^= 1;
            break;
        case 'l':
            pPars->fUseDcs ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }
    if ( fIndDCs )
    {
        if ( fUseAllFfs )
        {
            pAbc->nIndFrames = 1;
            Vec_IntFreeP( &pAbc->vIndFlops );
            pAbc->vIndFlops = Vec_IntAlloc( Abc_NtkLatchNum(pNtk) );
            Vec_IntFill( pAbc->vIndFlops, Abc_NtkLatchNum(pNtk), 1 );
        }
        if ( pAbc->nIndFrames <= 0 )
        {
            Abc_Print( -1, "The number of k-inductive frames is not specified.\n" );
            return 0;
        }
        if ( pAbc->vIndFlops == NULL )
        {
            Abc_Print( -1, "The set of k-inductive flops is not specified.\n" );
            return 0;
        }
        if ( Vec_IntSize(pAbc->vIndFlops) != Abc_NtkLatchNum(pNtk) )
        {
            Abc_Print( -1, "The saved flop count (%d) does not match that of the current network (%d).\n",
                Vec_IntSize(pAbc->vIndFlops), Abc_NtkLatchNum(pNtk) );
            return 0;
        }
        // modify the current network
        if ( !Abc_NtkMfsAfterICheck( pNtk, pAbc->nIndFrames, nFramesAdd, pAbc->vIndFlops, pPars ) )
        {
            Abc_Print( -1, "Resynthesis has failed.\n" );
            return 1;
        }
        if ( fUseAllFfs )
        {
            pAbc->nIndFrames = 0;
            Vec_IntFreeP( &pAbc->vIndFlops );
        }
    }
    else
    {
        // modify the current network
        if ( !Abc_NtkPerformMfs( pNtk, pPars ) )
        {
            Abc_Print( -1, "Resynthesis has failed.\n" );
            return 1;
        }
    }
    return 0;

usage:
    Abc_Print( -2, "usage: mfs2 [-WFDMLCZNI <num>] [-daeijlvwh]\n" );
    Abc_Print( -2, "\t           performs don't-care-based optimization of logic networks\n" );
    Abc_Print( -2, "\t-W <num> : the number of levels in the TFO cone (0 <= num) [default = %d]\n",             pPars->nTfoLevMax );
    Abc_Print( -2, "\t-F <num> : the max number of fanouts to skip (1 <= num) [default = %d]\n",                pPars->nFanoutMax );
    Abc_Print( -2, "\t-D <num> : the max depth nodes to try (0 = no limit) [default = %d]\n",                   pPars->nDepthMax );
    Abc_Print( -2, "\t-M <num> : the max node count of windows to consider (0 = no limit) [default = %d]\n",    pPars->nWinSizeMax );
    Abc_Print( -2, "\t-L <num> : the max increase in node level after resynthesis (0 <= num) [default = %d]\n", pPars->nGrowthLevel );
    Abc_Print( -2, "\t-C <num> : the max number of conflicts in one SAT run (0 = no limit) [default = %d]\n",   pPars->nBTLimit );
    Abc_Print( -2, "\t-Z <num> : treat the first <num> logic nodes as fixed (0 = none) [default = %d]\n",       pPars->nFirstFixed );
    Abc_Print( -2, "\t-N <num> : the max number of nodes to try (0 = all) [default = %d]\n",                    pPars->nNodesMax );
    Abc_Print( -2, "\t-d       : toggle performing redundancy removal [default = %s]\n",                        pPars->fRrOnly? "yes": "no" );
    Abc_Print( -2, "\t-a       : toggle minimizing area or area+edges [default = %s]\n",                        pPars->fArea? "area": "area+edges" );
    Abc_Print( -2, "\t-e       : toggle high-effort resubstitution [default = %s]\n",                           pPars->fMoreEffort? "yes": "no" );
    Abc_Print( -2, "\t-i       : toggle using inductive don't-cares [default = %s]\n",                          fIndDCs? "yes": "no" );
    Abc_Print( -2, "\t-j       : toggle using all flops when \"-i\" is enabled [default = %s]\n",               fUseAllFfs? "yes": "no" );
    Abc_Print( -2, "\t-I       : the number of additional frames inserted [default = %d]\n",                    nFramesAdd );
    Abc_Print( -2, "\t-l       : toggle deriving don't-cares [default = %s]\n",                                 pPars->fUseDcs? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",                        pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n",                pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMfs3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkPerformMfs3( Abc_Ntk_t * pNtk, Sfm_Par_t * pPars );
    extern void Sfm_ParSetDefault3( Sfm_Par_t * pPars );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Sfm_Par_t Pars, * pPars = &Pars; int c;
    // set defaults
    Sfm_ParSetDefault3( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IOVFKLHRMCNPWDEarmzoespdlvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfiLevMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfiLevMax < 1 )
            {
                Abc_Print( -1, "The number of TFI levels (switch \"-I\") should be at least 1.\n" );
                goto usage;
            }
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfoLevMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfoLevMax < 0 )
                goto usage;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfiLevMax = pPars->nTfoLevMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfiLevMax < 1 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFanoutMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFanoutMax < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nVarMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVarMax < 2 || pPars->nVarMax > 8 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMffcMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMffcMin < 0 )
                goto usage;
            break;
        case 'H':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-H\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMffcMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMffcMax < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nDecMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDecMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWinSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWinSizeMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNodesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNodesMax < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->iNodeOne = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->iNodeOne < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeWin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeWin < 0 || pPars->nTimeWin > 100 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->DeltaCrit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DeltaCrit < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->DelAreaRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelAreaRatio < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'r':
            pPars->fAreaRev ^= 1;
            break;
        case 'm':
            pPars->fUseAndOr ^= 1;
            break;
        case 'z':
            pPars->fZeroCost ^= 1;
            break;
        case 'o':
            pPars->fRrOnly ^= 1;
            break;
        case 'e':
            pPars->fMoreEffort ^= 1;
            break;
        case 's':
            pPars->fUseSim ^= 1;
            break;
        case 'p':
            pPars->fPrintDecs ^= 1;
            break;
        case 'd':
            pPars->fDelayVerbose ^= 1;
            break;
        case 'l':
            pPars->fLibVerbose ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsMappedLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a mapped logic network.\n" );
        return 1;
    }
    // modify the current network
    Abc_NtkPerformMfs3( pNtk, pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: mfs3 [-IOVFKLHRMCNPWDE <num>] [-armzespdlvwh]\n" );
    Abc_Print( -2, "\t           performs don't-care-based optimization of mapped networks\n" );
    Abc_Print( -2, "\t-I <num> : the number of levels in the TFI cone (1 <= num) [default = %d]\n",             pPars->nTfiLevMax );
    Abc_Print( -2, "\t-O <num> : the number of levels in the TFO cone (0 <= num) [default = %d]\n",             pPars->nTfoLevMax );
    Abc_Print( -2, "\t-V <num> : the number of levels in the TFI/TFO cone (1 <= num) [default = %d]\n",         pPars->nTfiLevMax );
    Abc_Print( -2, "\t-F <num> : the max number of fanouts to skip (1 <= num) [default = %d]\n",                pPars->nFanoutMax );
    Abc_Print( -2, "\t-K <num> : the max number of variables (2 <= num <= 8 ) [default = %d]\n",                pPars->nVarMax );
    Abc_Print( -2, "\t-L <num> : the min size of max fanout-free cone (MFFC) (area-only) [default = %d]\n",     pPars->nMffcMin );
    Abc_Print( -2, "\t-H <num> : the max size of max fanout-free cone (MFFC) (area-only) [default = %d]\n",     pPars->nMffcMax );
    Abc_Print( -2, "\t-R <num> : the max number of decomposition rounds (1 <= num <= 4) [default = %d]\n",      pPars->nDecMax );
    Abc_Print( -2, "\t-M <num> : the max node count of windows to consider (0 = no limit) [default = %d]\n",    pPars->nWinSizeMax );
    Abc_Print( -2, "\t-C <num> : the max number of conflicts in one SAT run (0 = no limit) [default = %d]\n",   pPars->nBTLimit );
    Abc_Print( -2, "\t-N <num> : the max number of nodes to try (0 = all) [default = %d]\n",                    pPars->nNodesMax );
    Abc_Print( -2, "\t-P <num> : one particular node to try (0 = none) [default = %d]\n",                       pPars->iNodeOne );
    Abc_Print( -2, "\t-W <num> : size of timing window in percents (0 <= num <= 100) [default = %d]\n",         pPars->nTimeWin );
    Abc_Print( -2, "\t-D <num> : size of critical-timing delay-delta (in picoseconds) [default = %d]\n",        pPars->DeltaCrit );
    Abc_Print( -2, "\t-E <num> : delay-area tradeoff (in picoseconds per area-unit) [default = %d]\n",          pPars->DelAreaRatio );
    Abc_Print( -2, "\t-a       : toggle area minimization [default = %s]\n",                                    pPars->fArea? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggle using reverse topo order for area minimization [default = %s]\n",       pPars->fAreaRev? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggle detecting multi-input AND/OR gates [default = %s]\n",                   pPars->fUseAndOr? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggle zero-cost replacements [default = %s]\n",                               pPars->fZeroCost? "yes": "no" );
    Abc_Print( -2, "\t-e       : toggle using more effort [default = %s]\n",                                    pPars->fMoreEffort? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggle using simulation [default = %s]\n",                                     pPars->fUseSim? "yes": "no" );
    Abc_Print( -2, "\t-p       : toggle printing decompositions [default = %s]\n",                              pPars->fPrintDecs? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggle printing delay profile statistics [default = %s]\n",                    pPars->fDelayVerbose? "yes": "no" );
    Abc_Print( -2, "\t-l       : toggle printing library usage statistics [default = %s]\n",                    pPars->fLibVerbose? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",                        pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n",                pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMfse( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkOptMfse( Abc_Ntk_t * pNtk, Acb_Par_t * pPars );
    Abc_Ntk_t * pNtkNew, * pNtk = Abc_FrameReadNtk(pAbc);
    Acb_Par_t Pars, * pPars = &Pars; int c;
    Acb_ParSetDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IOWFLCadvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfiLevMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfiLevMax < 0 )
                goto usage;
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfoLevMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfoLevMax < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWinNodeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWinNodeMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFanoutMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFanoutMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nGrowthLevel = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGrowthLevel < -ABC_INFINITY || pPars->nGrowthLevel > ABC_INFINITY )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'd':
            pPars->fUseAshen ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }
    pPars->nLutSize = Abc_NtkGetFaninMax( pNtk );
    if ( pPars->nLutSize > 6 )
    {
        Abc_Print( -1, "Command is only applicable to LUT size no more than 6.\n" );
        return 1;
    }
    Abc_NtkToSop( pNtk, -1, ABC_INFINITY );
    pNtkNew = Abc_NtkOptMfse( pNtk, pPars );
    if ( pNtkNew == NULL )
    {
        Abc_Print( -1, "Command \"mfse\" has failed.\n" );
        return 1;
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkNew );
    return 0;

usage:
    Abc_Print( -2, "usage: mfse [-IOWFLC <num>] [-advwh]\n" );
    Abc_Print( -2, "\t           performs don't-care-based optimization of logic networks\n" );
    Abc_Print( -2, "\t-I <num> : the number of levels in the TFI cone (2 <= num) [default = %d]\n",             pPars->nTfiLevMax );
    Abc_Print( -2, "\t-O <num> : the number of levels in the TFO cone (0 <= num) [default = %d]\n",             pPars->nTfoLevMax );
    Abc_Print( -2, "\t-W <num> : the max number of nodes in the window (1 <= num) [default = %d]\n",            pPars->nWinNodeMax );
    Abc_Print( -2, "\t-F <num> : the max number of fanouts to skip (1 <= num) [default = %d]\n",                pPars->nFanoutMax );
    Abc_Print( -2, "\t-L <num> : the max increase in node level after resynthesis (0 <= num) [default = %d]\n", pPars->nGrowthLevel );
    Abc_Print( -2, "\t-C <num> : the max number of conflicts in one SAT run (0 = no limit) [default = %d]\n",   pPars->nBTLimit );
    Abc_Print( -2, "\t-a       : toggle minimizing area [default = %s]\n",                                      pPars->fArea? "area": "delay" );
    Abc_Print( -2, "\t-d       : toggle using Ashenhurst decomposition [default = %s]\n",                       pPars->fUseAshen? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",                        pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n",                pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandLogicPush( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkOptPush( Abc_Ntk_t * pNtk, int nLutSize, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Ntk_t * pNtkRes;
    int nLutSize = 4;
    int fVerbose = 0;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Kvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }
    nLutSize = Abc_MaxInt( nLutSize, Abc_NtkGetFaninMax(pNtk) );
    Abc_NtkToSop( pNtk, -1, ABC_INFINITY );
    pNtkRes = Abc_NtkOptPush( pNtk, nLutSize, fVerbose );
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;
usage:
    Abc_Print( -2, "usage: logicpush [-K num] [-vh]\n" );
    Abc_Print( -2, "\t           performs logic pushing to reduce structural bias\n" );
    Abc_Print( -2, "\t-K <num> : the LUT size used in the mapping [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTrace( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseLutLib;
    int fVerbose;
    extern void Abc_NtkDelayTracePrint( Abc_Ntk_t * pNtk, int fUseLutLib, int fVerbose );

    // set defaults
    fUseLutLib = 0;
    fVerbose   = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUseLutLib ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }

    // modify the current network
    Abc_NtkDelayTracePrint( pNtk, fUseLutLib, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: trace [-lvh]\n" );
    Abc_Print( -2, "\t           performs delay trace of LUT-mapped network\n" );
    Abc_Print( -2, "\t-l       : toggle using unit- or LUT-library-delay model [default = %s]\n", fUseLutLib? "lib": "unit" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandGlitch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int nPats    = 4000;
    int Prob     =    8;
    int fVerbose =    1;
    int c;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NPvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nPats = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPats < 1 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            Prob = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Prob < 1 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a mapped logic network.\n" );
        return 1;
    }
    if ( Abc_NtkIsMappedLogic(pNtk) || Abc_NtkGetFaninMax(pNtk) <= 6 )
        Abc_Print( 1, "Glitching adds %7.2f %% of signal transitions, compared to switching.\n", Abc_NtkMfsTotalGlitching(pNtk, nPats, Prob, fVerbose) );
    else
        printf( "Currently computes glitching only for K-LUT networks with K <= 6.\n" );
    return 0;

usage:
    Abc_Print( -2, "usage: glitch [-NP <num>] [-vh]\n" );
    Abc_Print( -2, "\t           comparing glitching activity to switching activity\n" );
    Abc_Print( -2, "\t-N <num> : the number of random patterns to use (0 < num < 1000000) [default = %d]\n", nPats );
    Abc_Print( -2, "\t-P <num> : once in how many cycles an input changes its value [default = %d]\n", Prob );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSpeedup( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fUseLutLib;
    int Percentage;
    int Degree;
    int fVerbose;
    int fVeryVerbose;
    extern Abc_Ntk_t * Abc_NtkSpeedup( Abc_Ntk_t * pNtk, int fUseLutLib, int Percentage, int Degree, int fVerbose, int fVeryVerbose );
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    fUseLutLib = 0;
    Percentage = 5;
    Degree     = 2;
    fVerbose   = 0;
    fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PNlvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            Percentage = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Percentage < 1 || Percentage > 100 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            Degree = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Degree < 1 || Degree > 5 )
                goto usage;
            break;
        case 'l':
            fUseLutLib ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }

    // modify the current network
    pNtkRes = Abc_NtkSpeedup( pNtk, fUseLutLib, Percentage, Degree, fVerbose, fVeryVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "The command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: speedup [-PN <num>] [-lvwh]\n" );
    Abc_Print( -2, "\t           transforms LUT-mapped network into an AIG with choices;\n" );
    Abc_Print( -2, "\t           the choices are added to speedup the next round of mapping\n" );
    Abc_Print( -2, "\t-P <num> : delay delta defining critical path for library model [default = %d%%]\n", Percentage );
    Abc_Print( -2, "\t-N <num> : the max critical path degree for resynthesis (0 < num < 6) [default = %d]\n", Degree );
    Abc_Print( -2, "\t-l       : toggle using unit- or LUT-library-delay model [default = %s]\n", fUseLutLib? "lib" : "unit" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPowerdown( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fUseLutLib;
    int Percentage;
    int Degree;
    int fVerbose;
    int fVeryVerbose;
    extern Abc_Ntk_t * Abc_NtkPowerdown( Abc_Ntk_t * pNtk, int fUseLutLib, int Percentage, int Degree, int fVerbose, int fVeryVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fUseLutLib = 0;
    Percentage =10;
    Degree     = 2;
    fVerbose   = 0;
    fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PNlvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            Percentage = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Percentage < 1 || Percentage > 100 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            Degree = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Degree < 1 || Degree > 5 )
                goto usage;
            break;
        case 'l':
            fUseLutLib ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }

    // modify the current network
    pNtkRes = Abc_NtkPowerdown( pNtk, fUseLutLib, Percentage, Degree, fVerbose, fVeryVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "The command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: powerdown [-PN <num>] [-vwh]\n" );
    Abc_Print( -2, "\t           transforms LUT-mapped network into an AIG with choices;\n" );
    Abc_Print( -2, "\t           the choices are added to power down the next round of mapping\n" );
    Abc_Print( -2, "\t-P <num> : switching propability delta defining power critical edges [default = %d%%]\n", Percentage );
    Abc_Print( -2, "\t           (e.g. 5% means hot wires switch with probability: 0.45 <= p <= 0.50 (max)\n" );
    Abc_Print( -2, "\t-N <num> : the max critical path degree for resynthesis (0 < num < 6) [default = %d]\n", Degree );
//    Abc_Print( -2, "\t-l       : toggle using unit- or LUT-library-delay model [default = %s]\n", fUseLutLib? "lib" : "unit" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAddBuffs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkAddBuffs( Abc_Ntk_t * pNtk, int fDirect, int fReverse, int nImprove, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Ntk_t * pNtkRes;
    int fDirect;
    int fReverse;
    int nImprove;
    int c, fVerbose;

    fDirect  = 0;
    fReverse = 0;
    nImprove = 1000;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Idrvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nImprove = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nImprove < 0 )
                goto usage;
            break;
        case 'd':
            fDirect ^= 1;
            break;
        case 'r':
            fReverse ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to a logic network.\n" );
        return 1;
    }

    // modify the current network
    pNtkRes = Abc_NtkAddBuffs( pNtk, fDirect, fReverse, nImprove, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "The command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: addbuffs [-I num] [-drvh]\n" );
    Abc_Print( -2, "\t           adds buffers to create balanced CI/CO paths\n" );
    Abc_Print( -2, "\t-I <num> : the number of refinement iterations [default = %d]\n", nImprove );
    Abc_Print( -2, "\t-d       : toggle using only CI-to-CO levelized order [default = %s]\n", fDirect? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggle using only CO-to-C1 levelized order [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

//#if 0
/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMerge( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Nwk_LMPars_t Pars, * pPars = &Pars;
    Vec_Int_t * vResult;
    int c;
    extern Vec_Int_t * Abc_NtkLutMerge( Abc_Ntk_t * pNtk, Nwk_LMPars_t * pPars );
    // set defaults
    memset( pPars, 0, sizeof(Nwk_LMPars_t) );
    pPars->nMaxLutSize    = 5;   // the max LUT size for merging (N=5)
    pPars->nMaxSuppSize   = 5;   // the max total support size after merging (S=5)
    pPars->nMaxDistance   = 3;   // the max number of nodes separating LUTs
    pPars->nMaxLevelDiff  = 2;   // the max difference in levels
    pPars->nMaxFanout     = 100; // the max number of fanouts to traverse
    pPars->fUseDiffSupp   = 0;   // enables the use of nodes with different support
    pPars->fUseTfiTfo     = 0;   // enables the use of TFO/TFO nodes as candidates
    pPars->fVeryVerbose   = 0;   // enables additional verbose output
    pPars->fVerbose       = 1;   // enables verbose output
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NSDLFscvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxLutSize < 2 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxSuppSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxSuppSize < 2 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxDistance = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxDistance < 2 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxLevelDiff = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxLevelDiff < 2 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxFanout = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxFanout < 2 )
                goto usage;
            break;
        case 's':
            pPars->fUseDiffSupp ^= 1;
            break;
        case 'c':
            pPars->fUseTfiTfo ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL || !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Abc_CommandMerge(): There is no mapped network to merge LUTs.\n" );
        return 1;
    }

    vResult = Abc_NtkLutMerge( pNtk, pPars );
    Vec_IntFree( vResult );
    return 0;

usage:
    Abc_Print( -2, "usage: merge [-NSDLF <num>] [-scwvh]\n" );
    Abc_Print( -2, "\t           creates pairs of topologically-related LUTs\n" );
    Abc_Print( -2, "\t-N <num> : the max LUT size for merging (1 < num) [default = %d]\n", pPars->nMaxLutSize );
    Abc_Print( -2, "\t-S <num> : the max total support size after merging (1 < num) [default = %d]\n", pPars->nMaxSuppSize );
    Abc_Print( -2, "\t-D <num> : the max distance in terms of LUTs (0 < num) [default = %d]\n", pPars->nMaxDistance );
    Abc_Print( -2, "\t-L <num> : the max difference in levels (0 <= num) [default = %d]\n", pPars->nMaxLevelDiff );
    Abc_Print( -2, "\t-F <num> : the max number of fanouts to stop traversal (0 < num) [default = %d]\n", pPars->nMaxFanout );
    Abc_Print( -2, "\t-s       : toggle the use of nodes without support overlap [default = %s]\n", pPars->fUseDiffSupp? "yes" : "no" );
    Abc_Print( -2, "\t-c       : toggle the use of TFI/TFO nodes as candidates [default = %s]\n", pPars->fUseTfiTfo? "yes" : "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}
//#endif



/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestDec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_DecTest( char * pFileName, int DecType, int nVarNum, int fVerbose );
    char * pFileName;
    int c;
    int fVerbose = 0;
    int DecType = 0;
    int nVarNum = -1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ANvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            DecType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( DecType < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nVarNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVarNum < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( 1,"Input file is not given.\n" );
        return 0;
    }
    if ( nVarNum >= 0 && nVarNum < 6 )
    {
        Abc_Print( 1,"The number of variables cannot be less than 6.\n" );
        return 0;
    }
    // get the output file name
    pFileName = argv[globalUtilOptind];
    // call the testbench
    Abc_DecTest( pFileName, DecType, nVarNum, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: testdec [-AN <num>] [-vh] <file>\n" );
    Abc_Print( -2, "\t           testbench for Boolean decomposition algorithms\n" );
    Abc_Print( -2, "\t-A <num> : decomposition algorithm [default = %d]\n", DecType );
    Abc_Print( -2, "\t               0: none (reading and writing the file)\n" );
    Abc_Print( -2, "\t               1: algebraic factoring applied to ISOP\n" );
    Abc_Print( -2, "\t               2: bi-decomposition with cofactoring\n" );
    Abc_Print( -2, "\t               3: disjoint-support decomposition with cofactoring\n" );
    Abc_Print( -2, "\t               4: updated disjoint-support decomposition with cofactoring\n" );
    Abc_Print( -2, "\t               5: enumerating decomposable variable sets\n" );
    Abc_Print( -2, "\t               6: disjoint-support decomposition with cofactoring and boolean difference analysis\n" );
    Abc_Print( -2, "\t                  from V. Callegaro, F. S. Marranghello, M. G. A. Martins, R. P. Ribas and A. I. Reis,\n");
    Abc_Print( -2, "\t                  \"Bottom-up disjoint-support decomposition based on cofactor and boolean difference analysis,\" ICCD'15.\n" );
    Abc_Print( -2, "\t-N <num> : the number of support variables (binary files only) [default = unused]\n" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\t<file>   : a text file with truth tables in hexadecimal, listed one per line,\n");
    Abc_Print( -2, "\t           or a binary file with an array of truth tables (in this case,\n");
    Abc_Print( -2, "\t           -N <num> is required to determine how many functions are stored)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestNpn( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_NpnTest( char * pFileName, int NpnType, int nVarNum, int fDumpRes, int fBinary, int fVerbose );
    char * pFileName;
    int c;
    int fVerbose = 0;
    int NpnType = 0;
    int nVarNum = -1;
    int fDumpRes = 0;
    int fBinary = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ANdbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            NpnType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( NpnType < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nVarNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVarNum < 0 )
                goto usage;
            break;
        case 'd':
            fDumpRes ^= 1;
            break;
        case 'b':
            fBinary ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( 1,"Input file is not given.\n" );
        return 0;
    }
    if ( nVarNum >= 0 && nVarNum < 6 )
    {
        Abc_Print( 1,"The number of variables cannot be less than 6.\n" );
        return 0;
    }
    // get the output file name
    pFileName = argv[globalUtilOptind];
    // call the testbench
    Abc_NpnTest( pFileName, NpnType, nVarNum, fDumpRes, fBinary, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: testnpn [-AN <num>] [-dbvh] <file>\n" );
    Abc_Print( -2, "\t           testbench for computing (semi-)canonical forms\n" );
    Abc_Print( -2, "\t           of completely-specified Boolean functions up to 16 varibles\n" );
    Abc_Print( -2, "\t-A <num> : semi-caninical form computation algorithm [default = %d]\n", NpnType );
    Abc_Print( -2, "\t               0: uniqifying truth tables\n" );
    Abc_Print( -2, "\t               1: exact NPN canonical form by brute-force enumeration\n" );
    Abc_Print( -2, "\t               2: semi-canonical form by counting 1s in cofactors\n" );
    Abc_Print( -2, "\t               3: Jake's hybrid semi-canonical form (fast)\n" );
    Abc_Print( -2, "\t               4: Jake's hybrid semi-canonical form (high-effort)\n" );
    Abc_Print( -2, "\t               5: new fast hybrid semi-canonical form\n" );
    Abc_Print( -2, "\t               6: new phase canonical form\n" );
    Abc_Print( -2, "\t               7: new hierarchical matching\n" );
    Abc_Print( -2, "\t               8: hierarchical matching            by XueGong Zhou at Fudan University, Shanghai\n" );
    Abc_Print( -2, "\t               9: adjustable algorithm (heuristic) by XueGong Zhou at Fudan University, Shanghai\n" );
    Abc_Print( -2, "\t              10: adjustable algorithm (exact)     by XueGong Zhou at Fudan University, Shanghai\n" );
    Abc_Print( -2, "\t              11: new cost-aware exact algorithm   by XueGong Zhou at Fudan University, Shanghai\n" );
    Abc_Print( -2, "\t              12: new fast hybrid semi-canonical form (permutation only)\n" );
    Abc_Print( -2, "\t-N <num> : the number of support variables (binary files only) [default = unused]\n" );
    Abc_Print( -2, "\t-d       : toggle dumping resulting functions into a file [default = %s]\n", fDumpRes? "yes": "no" );
    Abc_Print( -2, "\t-b       : toggle dumping in binary format [default = %s]\n", fBinary? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\t<file>   : a text file with truth tables in hexadecimal, listed one per line,\n");
    Abc_Print( -2, "\t           or a binary file with an array of truth tables (in this case,\n");
    Abc_Print( -2, "\t           -N <num> is required to determine how many functions are stored)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestRPO(Abc_Frame_t * pAbc, int argc, char ** argv) {
    extern int Abc_RpoTest(char * pFileName, int nVarNum, int nThreshold, int fVerbose);
    char * pFileName;
    int c;
    int nVarNum = -1;
    int fVerbose = 0;
    int nThreshold = -1;
    Extra_UtilGetoptReset();
    while ((c = Extra_UtilGetopt(argc, argv, "TNvh")) != EOF) {
        switch (c) {
            case 'N':
                if (globalUtilOptind >= argc) {
                    Abc_Print(-1, "Command line switch \"-N\" should be followed by an integer.\n");
                    goto usage;
                }
                nVarNum = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if (nVarNum < 0)
                    goto usage;
                break;
            case 'T':
                if (globalUtilOptind >= argc) {
                    Abc_Print(-1, "Command line switch \"-T\" should be followed by an integer.\n");
                    goto usage;
                }
                nThreshold = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if (nThreshold < 0)
                    goto usage;
                break;
            case 'v':
                fVerbose ^= 1;
                break;
            case 'h':
                goto usage;
            default:
                goto usage;
        }
    }
    if (argc != globalUtilOptind + 1)
    {
        Abc_Print(1, "Input file is not given.\n");
        goto usage;
    }
    // get the output file name
    pFileName = argv[globalUtilOptind];
    // call the testbench
    Abc_RpoTest( pFileName, nVarNum, nThreshold, fVerbose );
    return 0;

usage:
    Abc_Print(-2, "usage: testrpo [-NT <num>] [-vh] <file>\n");
    Abc_Print(-2, "\t           RPO algorithm developed and implemented by Mayler G. A. Martins,\n");
    Abc_Print(-2, "\t           Vinicius Callegaro, Renato P. Ribas and Andre' I. Reis\n");
    Abc_Print(-2, "\t           at Federal University of Rio Grande do Sul, Porto Alegre, Brazil\n");
    Abc_Print(-2, "\t-N <num> : the number of support variables (binary files only) [default = unused]\n");
    Abc_Print(-2, "\t-T <num> : the number of recursions accepted before abort [default = INFINITE]\n");
    Abc_Print(-2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose ? "yes" : "no");
    Abc_Print(-2, "\t-h       : print the command usage\n");
    Abc_Print(-2, "\t<file>   : a text file with truth tables in hexadecimal, listed one per line,\n");
    Abc_Print(-2, "\t           or a binary file with an array of truth tables (in this case,\n");
    Abc_Print(-2, "\t           -N <num> is required to determine how many functions are stored)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestTruth( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int * Kit_TruthTest( char * pFileName );
    int * pResult = NULL;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( 1,"Input file is not given.\n" );
        return 0;
    }
    pResult = Kit_TruthTest( argv[globalUtilOptind] );
    ABC_FREE( pResult );
    return 0;

usage:
    Abc_Print( -2, "usage: testtruth [-vh] <file>\n" );
    Abc_Print( -2, "\t           printing truth table stats\n" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRunEco( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Acb_NtkRunEco( char * pFileNames[4], int nTimeout, int fCheck, int fRandom, int fInputs, int fUnitW, int fVerbose, int fVeryVerbose );
    char * pFileNames[4] = {NULL};
    int c, nTimeout = 0, fCheck = 0, fRandom = 0, fInputs = 0, fUnitW = 0, fVerbose = 0, fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Tcriuvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeout = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeout < 0 )
                goto usage;
            break;
        case 'c':
            fCheck ^= 1;
            break;
        case 'r':
            fRandom ^= 1;
            break;
        case 'i':
            fInputs ^= 1;
            break;
        case 'u':
            fUnitW ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
//    pArgvNew = argv + globalUtilOptind;
//    nArgcNew = argc - globalUtilOptind;
    if ( argc - globalUtilOptind < 2 || argc - globalUtilOptind > 3 )
    {
        Abc_Print( 1, "Expecting three file names on the command line.\n" );
        goto usage;
    }
    for ( c = 0; c < argc - globalUtilOptind; c++ )
    {
        FILE * pFile = fopen( argv[globalUtilOptind+c], "rb" );
        if ( pFile == NULL )
        {
            printf( "Cannot open input file \"%s\".\n", argv[globalUtilOptind+c] );
            return 0;
        }
        else
            fclose( pFile );
        pFileNames[c] = argv[globalUtilOptind+c];
    }
    Acb_NtkRunEco( pFileNames, nTimeout, fCheck, fRandom, fInputs, fUnitW, fVerbose, fVeryVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: runeco [-T num] [-criuvwh] <implementation> <specification> <weights>\n" );
    Abc_Print( -2, "\t         performs computation of patch functions during ECO,\n" );
    Abc_Print( -2, "\t         as described in the following paper: A. Q. Dao et al\n" );
    Abc_Print( -2, "\t         \"Efficient computation of ECO patch functions\", Proc. DAC\'18\n" );
    Abc_Print( -2, "\t         https://people.eecs.berkeley.edu/~alanmi/publications/2018/dac18_eco.pdf\n" );
    Abc_Print( -2, "\t         (currently only applicable to benchmarks from 2017 ICCAD CAD competition\n" );
    Abc_Print( -2, "\t         http://cad-contest-2017.el.cycu.edu.tw/Problem_A/default.html as follows:\n" );
    Abc_Print( -2, "\t         \"runeco unit1/F.v unit1/G.v unit1/weight.txt; cec -n out.v unit1/G.v\")\n" );
    Abc_Print( -2, "\t-T num : the timeout in seconds [default = %d]\n", nTimeout );
    Abc_Print( -2, "\t-c     : toggle checking that the problem has a solution [default = %s]\n", fCheck? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle using random permutation of support variables [default = %s]\n", fRandom? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggle using primary inputs as support variables [default = %s]\n", fInputs? "yes": "no" );
    Abc_Print( -2, "\t-u     : toggle using unit weights [default = %s]\n", fUnitW? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing more verbose information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRunGen( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Acb_NtkRunGen( char * pFileNames[2], int fVerbose );
    char * pFileNames[4] = {NULL};
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc - globalUtilOptind != 2 )
    {
        Abc_Print( 1, "Expecting two file names on the command line.\n" );
        goto usage;
    }
    for ( c = 0; c < 2; c++ )
        pFileNames[c] = argv[globalUtilOptind+c];
    Acb_NtkRunGen( pFileNames, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: rungen [-vh] <file1> <file2>\n" );
    Abc_Print( -2, "\t         experimental command\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRunTest( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Acb_NtkRunTest( char * pFileNames[4], int fFancy, int fVerbose );
    char * pFileNames[4] = {NULL};
    int c, fFancy = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "fvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'f':
            fFancy ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc - globalUtilOptind < 2 || argc - globalUtilOptind > 5 )
    {
        Abc_Print( 1, "Expecting two or three file names on the command line.\n" );
        goto usage;
    }
    for ( c = 0; c < argc - globalUtilOptind; c++ )
        pFileNames[c] = argv[globalUtilOptind+c];
    Acb_NtkRunTest( pFileNames, fFancy, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: xec [-fvh] <file1> <file2>\n" );
    Abc_Print( -2, "\t           combinational equivalence checking with x-values\n" );
    Abc_Print( -2, "\t-f       : toggle using experimental feature [default = %s]\n",      fFancy? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing verbose information [default = %s]\n",    fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}



/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRewrite( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pDup;
    int c, RetValue;
    int fUpdateLevel;
    int fPrecompute;
    int fUseZeros;
    int fVerbose;
    int fVeryVerbose;
    int fPlaceEnable;
    // external functions
    extern void Rwr_Precompute();

    // set defaults
    fUpdateLevel = 1;
    fPrecompute  = 0;
    fUseZeros    = 0;
    fVerbose     = 0;
    fVeryVerbose = 0;
    fPlaceEnable = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lxzvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'x':
            fPrecompute ^= 1;
            break;
        case 'z':
            fUseZeros ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'p':
            fPlaceEnable ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( fPrecompute )
    {
        Rwr_Precompute();
        return 0;
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to an AIG (run \"strash\").\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum(pNtk) )
    {
        Abc_Print( -1, "AIG resynthesis cannot be applied to AIGs with choice nodes.\n" );
        return 1;
    }

    // modify the current network
    pDup = Abc_NtkDup( pNtk );
    RetValue = Abc_NtkRewrite( pNtk, fUpdateLevel, fUseZeros, fVerbose, fVeryVerbose, fPlaceEnable );
    if ( RetValue == -1 )
    {
        Abc_FrameReplaceCurrentNetwork( pAbc, pDup );
        printf( "An error occurred during computation. The original network is restored.\n" );
    }
    else
    {
        Abc_NtkDelete( pDup );
        if ( RetValue == 0 )
        {
            Abc_Print( 0, "Rewriting has failed.\n" );
            return 1;
        }
    }
    return 0;

usage:
    Abc_Print( -2, "usage: rewrite [-lzvwh]\n" );
    Abc_Print( -2, "\t         performs technology-independent rewriting of the AIG\n" );
    Abc_Print( -2, "\t-l     : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle using zero-cost replacements [default = %s]\n", fUseZeros? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printout subgraph statistics [default = %s]\n", fVeryVerbose? "yes": "no" );
//    Abc_Print( -2, "\t-p     : toggle placement-aware rewriting [default = %s]\n", fPlaceEnable? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRefactor( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pDup;
    int c, RetValue;
    int nNodeSizeMax;
    int nMinSaved;
    int nConeSizeMax;
    int fUpdateLevel;
    int fUseZeros;
    int fUseDcs;
    int fVerbose;
    extern int Abc_NtkRefactor( Abc_Ntk_t * pNtk, int nNodeSizeMax, int nMinSaved, int nConeSizeMax, int fUpdateLevel, int fUseZeros, int fUseDcs, int fVerbose );

    // set defaults
    nNodeSizeMax = 10;
    nMinSaved    =  1;
    nConeSizeMax = 16;
    fUpdateLevel =  1;
    fUseZeros    =  0;
    fUseDcs      =  0;
    fVerbose     =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NMClzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodeSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodeSizeMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nMinSaved = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMinSaved < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConeSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConeSizeMax < 0 )
                goto usage;
            break;
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'z':
            fUseZeros ^= 1;
            break;
        case 'd':
            fUseDcs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( fUseZeros )
        nMinSaved = 0;
    if ( nMinSaved == 0 )
        fUseZeros = 1;

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to an AIG (run \"strash\").\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum(pNtk) )
    {
        Abc_Print( -1, "AIG resynthesis cannot be applied to AIGs with choice nodes.\n" );
        return 1;
    }
    if ( nNodeSizeMax > 15 )
    {
        Abc_Print( -1, "The cone size cannot exceed 15.\n" );
        return 1;
    }

    if ( fUseDcs && nNodeSizeMax >= nConeSizeMax )
    {
        Abc_Print( -1, "For don't-care to work, containing cone should be larger than collapsed node.\n" );
        return 1;
    }

    // modify the current network
    pDup = Abc_NtkDup( pNtk );
    RetValue = Abc_NtkRefactor( pNtk, nNodeSizeMax, nMinSaved, nConeSizeMax, fUpdateLevel, fUseZeros, fUseDcs, fVerbose );
    if ( RetValue == -1 )
    {
        Abc_FrameReplaceCurrentNetwork( pAbc, pDup );
        printf( "An error occurred during computation. The original network is restored.\n" );
    }
    else
    {
        Abc_NtkDelete( pDup );
        if ( RetValue == 0 )
        {
            Abc_Print( 0, "Refactoring has failed.\n" );
            return 1;
        }
    }
    return 0;

usage:
    Abc_Print( -2, "usage: refactor [-NM <num>] [-lzvh]\n" );
    Abc_Print( -2, "\t           performs technology-independent refactoring of the AIG\n" );
    Abc_Print( -2, "\t-N <num> : the max support of the collapsed node [default = %d]\n", nNodeSizeMax );
    Abc_Print( -2, "\t-M <num> : the min number of nodes saved after one step (0 <= num) [default = %d]\n", nMinSaved );
//    Abc_Print( -2, "\t-C <num> : the max support of the containing cone [default = %d]\n", nConeSizeMax );
    Abc_Print( -2, "\t-l       : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggle using zero-cost replacements [default = %s]\n", fUseZeros? "yes": "no" );
//    Abc_Print( -2, "\t-d       : toggle using don't-cares [default = %s]\n", fUseDcs? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRestructure( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nCutsMax;
    int fUpdateLevel;
    int fUseZeros;
    int fVerbose;
    extern int Abc_NtkRestructure( Abc_Ntk_t * pNtk, int nCutsMax, int fUpdateLevel, int fUseZeros, int fVerbose );

    // set defaults
    nCutsMax      =  5;
    fUpdateLevel =  0;
    fUseZeros    =  0;
    fVerbose     =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Klzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutsMax < 0 )
                goto usage;
            break;
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'z':
            fUseZeros ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( nCutsMax < 4 || nCutsMax > CUT_SIZE_MAX )
    {
        Abc_Print( -1, "Can only compute the cuts for %d <= K <= %d.\n", 4, CUT_SIZE_MAX );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to an AIG (run \"strash\").\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum(pNtk) )
    {
        Abc_Print( -1, "AIG resynthesis cannot be applied to AIGs with choice nodes.\n" );
        return 1;
    }

    // modify the current network
    if ( !Abc_NtkRestructure( pNtk, nCutsMax, fUpdateLevel, fUseZeros, fVerbose ) )
    {
        Abc_Print( -1, "Refactoring has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: restructure [-K <num>] [-lzvh]\n" );
    Abc_Print( -2, "\t           performs technology-independent restructuring of the AIG\n" );
    Abc_Print( -2, "\t-K <num> : the max cut size (%d <= num <= %d) [default = %d]\n",   CUT_SIZE_MIN, CUT_SIZE_MAX, nCutsMax );
    Abc_Print( -2, "\t-l       : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggle using zero-cost replacements [default = %s]\n", fUseZeros? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandResubstitute( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int RS_CUT_MIN =  4;
    int RS_CUT_MAX = 16;
    int c;
    int nCutsMax;
    int nNodesMax;
    int nLevelsOdc;
    int nMinSaved;
    int fUpdateLevel;
    int fUseZeros;
    int fVerbose;
    int fVeryVerbose;
    extern int Abc_NtkResubstitute( Abc_Ntk_t * pNtk, int nCutsMax, int nNodesMax, int nMinSaved, int nLevelsOdc, int fUpdateLevel, int fVerbose, int fVeryVerbose );

    // set defaults
    nCutsMax     =  8;
    nNodesMax    =  1;
    nLevelsOdc   =  0;
    nMinSaved    =  1;
    fUpdateLevel =  1;
    fUseZeros    =  0;
    fVerbose     =  0;
    fVeryVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KNMFlzvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutsMax < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodesMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nMinSaved = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMinSaved < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevelsOdc = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevelsOdc < 0 )
                goto usage;
            break;
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'z':
            fUseZeros ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( fUseZeros )
        nMinSaved = 0;
    if ( nMinSaved == 0 )
        fUseZeros = 1;

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( nCutsMax < RS_CUT_MIN || nCutsMax > RS_CUT_MAX )
    {
        Abc_Print( -1, "Can only compute cuts for %d <= K <= %d.\n", RS_CUT_MIN, RS_CUT_MAX );
        return 1;
    }
    if ( nNodesMax < 0 || nNodesMax > 3 )
    {
        Abc_Print( -1, "Can only resubstitute at most 3 nodes.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to an AIG (run \"strash\").\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum(pNtk) )
    {
        Abc_Print( -1, "AIG resynthesis cannot be applied to AIGs with choice nodes.\n" );
        return 1;
    }

    // modify the current network
    if ( !Abc_NtkResubstitute( pNtk, nCutsMax, nNodesMax, nMinSaved, nLevelsOdc, fUpdateLevel, fVerbose, fVeryVerbose ) )
    {
        Abc_Print( -1, "Refactoring has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: resub [-KNMF <num>] [-lzvwh]\n" );
    Abc_Print( -2, "\t           performs technology-independent restructuring of the AIG\n" );
    Abc_Print( -2, "\t-K <num> : the max cut size (%d <= num <= %d) [default = %d]\n", RS_CUT_MIN, RS_CUT_MAX, nCutsMax );
    Abc_Print( -2, "\t-N <num> : the max number of nodes to add (0 <= num <= 3) [default = %d]\n", nNodesMax );
    Abc_Print( -2, "\t-M <num> : the min number of nodes saved after one step (0 <= num) [default = %d]\n", nMinSaved );
    Abc_Print( -2, "\t-F <num> : the number of fanout levels for ODC computation [default = %d]\n", nLevelsOdc );
    Abc_Print( -2, "\t-l       : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggle using zero-cost replacements [default = %s]\n", fUseZeros? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle verbose printout of ODC computation [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandResubCheck( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Res6_ManResubCheck( char * pFileNameRes, char * pFileNameSol, int fVerbose );
    char * pFileR = NULL, * pFileS = NULL;
    int fVerbose = 0, c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 2 )
    {
        pFileR = argv[globalUtilOptind];
        pFileS = argv[globalUtilOptind+1];
    }
    else if ( argc == globalUtilOptind + 1 )
    {
        pFileR = argv[globalUtilOptind];
        pFileS = NULL;
    }
    else 
    {
        Abc_Print( -1, "Incorrect number of command line arguments.\n" );
        return 1;
    }
    Res6_ManResubCheck( pFileR, pFileS, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: resub_check [-vh] <file1> <file2>\n" );
    Abc_Print( -2, "\t           checks solution to a resub problem\n" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t<file1>  : resub problem file name\n");
    Abc_Print( -2, "\t<file2>  : (optional) solution file name\n");
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c, Window;
    int nFaninLevels;
    int nFanoutLevels;
    int fUseFanouts;
    int fVerbose;
    extern int Abc_NtkRR( Abc_Ntk_t * pNtk, int nFaninLevels, int nFanoutLevels, int fUseFanouts, int fVerbose );

    // set defaults
    nFaninLevels  = 3;
    nFanoutLevels = 3;
    fUseFanouts   = 0;
    fVerbose      = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Wfvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            Window = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Window < 0 )
                goto usage;
            nFaninLevels  = Window / 10;
            nFanoutLevels = Window % 10;
            break;
        case 'f':
            fUseFanouts ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    printf( "This command is obsolete." );
    printf( "To perform pure redudancy removal, try \"mfs -r\".\n" );
    printf( "To perform something a little stronger try \"mfs2\"\n" );
    printf( "When working with an AIG, use \"logic\" before and \"strash\" after this command.\n" );
    return 0;

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command can only be applied to an AIG (run \"strash\").\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum(pNtk) )
    {
        Abc_Print( -1, "AIG resynthesis cannot be applied to AIGs with choice nodes.\n" );
        return 1;
    }

    // modify the current network
    if ( !Abc_NtkRR( pNtk, nFaninLevels, nFanoutLevels, fUseFanouts, fVerbose ) )
    {
        Abc_Print( -1, "Redundancy removal has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: rr [-W NM] [-fvh]\n" );
    Abc_Print( -2, "\t         removes combinational redundancies in the current network\n" );
    Abc_Print( -2, "\t-W NM  : window size: TFI (N) and TFO (M) logic levels [default = %d%d]\n", nFaninLevels, nFanoutLevels );
    Abc_Print( -2, "\t-f     : toggle RR w.r.t. fanouts [default = %s]\n", fUseFanouts? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCascade( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nLutSize;
    int fCheck;
    int fVerbose;
    extern Abc_Ntk_t * Abc_NtkCascade( Abc_Ntk_t * pNtk, int nLutSize, int fCheck, int fVerbose );
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    nLutSize = 12;
    fCheck   = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Kcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'c':
            fCheck ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Can only collapse a logic network or an AIG.\n" );
        return 1;
    }

    // get the new network
    if ( Abc_NtkIsStrash(pNtk) )
        pNtkRes = Abc_NtkCascade( pNtk, nLutSize, fCheck, fVerbose );
    else
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        pNtkRes = Abc_NtkCascade( pNtk, nLutSize, fCheck, fVerbose );
        Abc_NtkDelete( pNtk );
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Cascade synthesis has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: cascade [-K <num>] [-cvh]\n" );
    Abc_Print( -2, "\t           performs LUT cascade synthesis for the current network\n" );
    Abc_Print( -2, "\t-K <num> : the number of LUT inputs [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-c       : check equivalence after synthesis [default = %s]\n", fCheck? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\t           \n");
    Abc_Print( -2, "  A lookup-table cascade is a programmable architecture developed by\n");
    Abc_Print( -2, "  Professor Tsutomu Sasao (sasao@cse.kyutech.ac.jp) at Kyushu Institute\n");
    Abc_Print( -2, "  of Technology. This work received Takeda Techno-Entrepreneurship Award:\n");
    Abc_Print( -2, "  http://www.lsi-cad.com/sasao/photo/takeda.html\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExtract( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkShareXor( Abc_Ntk_t * pNtk, int nMultiSize, int fAnd, int fVerbose );
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nMultiSize, fAnd, fVerbose;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    nMultiSize = 3;
    fAnd       = 0;
    fVerbose   = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Kavh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nMultiSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMultiSize < 0 )
                goto usage;
            break;
        case 'a':
            fAnd ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Can only collapse a logic network or an AIG.\n" );
        return 1;
    }
    // get the new network
    pNtkRes = Abc_NtkShareXor( pNtk, nMultiSize, fAnd, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Cascade synthesis has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: extract [-K <num>] [-avh]\n" );
    Abc_Print( -2, "\t           extracts shared logic from multi-input gates\n" );
    Abc_Print( -2, "\t-K <num> : the minimum gate size to consider for extraction [default = %d]\n", nMultiSize );
    Abc_Print( -2, "\t-a       : toggle multi-input XOR vs multi-input AND [default = %s]\n", fAnd? "AND": "XOR" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandVarMin( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_SuppTest( int nOnes, int nVars, int fUseSimple, int fCheck, int fVerbose );
    extern void Abc_SuppReadMinTest( char * pFileName );
    int nOnes      =  4;
    int nVars      = 20;
    int fUseSimple =  0;
    int fCheck     =  0;
    int fVerbose   =  0;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "MNocvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nOnes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOnes < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 0 )
                goto usage;
            break;
        case 'o':
            fUseSimple ^= 1;
            break;
        case 'c':
            fCheck ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    // get the file name
    if ( argc == globalUtilOptind + 1 )
    {
        Abc_SuppReadMinTest( argv[globalUtilOptind] );
        return 0;
    }
    Abc_SuppTest( nOnes, nVars, fUseSimple, fCheck, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: varmin [-MN <num>] [-ocvh]\n" );
    Abc_Print( -2, "\t           performs support minimization\n" );
    Abc_Print( -2, "\t-M <num> : the number of ones in the combination [default = %d]\n", nOnes );
    Abc_Print( -2, "\t-N <num> : the number of variables in the problem [default = %d]\n", nVars );
    Abc_Print( -2, "\t-o       : toggle computing reduced difference matrix [default = %s]\n", fUseSimple? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggle verifying the final result [default = %s]\n", fCheck? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFaultClasses( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkDetectClassesTest( Abc_Ntk_t * pNtk, int fSeq, int fVerbose, int fVeryVerbose );
    extern void Abc_NtkGenFaultList( Abc_Ntk_t * pNtk, char * pFileName, int fStuckAt );
    Abc_Ntk_t * pNtk;
    int c, fGen = 0, fStuckAt = 0, fSeq = 0, fVerbose = 0, fVeryVerbose = 0;
    pNtk = Abc_FrameReadNtk(pAbc);
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "gcsvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'g':
            fGen ^= 1;
            break;
        case 'c':
            fStuckAt ^= 1;
            break;
        case 's':
            fSeq ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only applicable to a logic network.\n" );
        return 1;
    }
    if ( fGen )
    {
        char * pFileName = Extra_FileNameGenericAppend(Abc_NtkSpec(pNtk), "_faults.txt");
        Abc_NtkGenFaultList( pNtk, pFileName, fStuckAt );
    }
    else
        Abc_NtkDetectClassesTest( pNtk, fSeq, fVerbose, fVeryVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: faultclasses [-gcsvwh]\n" );
    Abc_Print( -2, "\t           computes equivalence classes of faults in the given mapped netlist;\n" );
    Abc_Print( -2, "\t           the fault list with faults in the format: <fault_id> <node_name> <fault_name>\n" );
    Abc_Print( -2, "\t           should be read by command \"read_fins\" before calling this command\n" );
    Abc_Print( -2, "\t-g       : toggle generating a fault list for the current mapped network [default = %s]\n", fGen? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggle using only stuck-at faults in the generated fault list [default = %s]\n", fStuckAt? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggle detecting sequential equivalence classes [default = %s]\n", fSeq? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout during computation [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing of resulting fault equivalence classes [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExact( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManFindExact( word * pTruth, int nVars, int nFunc, int nMaxDepth, int * pArrivalTimes, int nBTLimit, int nStartGates, int fVerbose );

    int c, nMaxDepth = -1, fMakeAIG = 0, fTest = 0, fVerbose = 0, nVars = 0, nVarsTmp, nFunc = 0, nStartGates = 1, nBTLimit = 400000;
    char * p1, * p2;
    word pTruth[64];
    int pArrTimeProfile[8], fHasArrTimeProfile = 0;
    Abc_Ntk_t * pNtkRes;
    Gia_Man_t * pGiaRes;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "DASCatvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nMaxDepth = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxDepth < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            fHasArrTimeProfile = 1;
            p1 = p2 = argv[globalUtilOptind++];
            while ( true ) {
                if ( *p2 == ',' )
                {
                    *p2 = '\0';
                    pArrTimeProfile[nVars++] = atoi( p1 );
                    *p2++ = ',';
                    p1 = p2;
                }
                else if ( *p2 == '\0' )
                {
                    pArrTimeProfile[nVars++] = atoi( p1 );
                    break;
                }
                else
                    ++p2;
            }
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nStartGates = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nStartGates < 1 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'a':
            fMakeAIG ^= 1;
            break;
        case 't':
            fTest ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( fTest )
    {
        extern void Abc_ExactTest( int fVerbose );
        extern void Abc_ExactStoreTest( int fVerbose );

        printf( "run test suite, ignore all other settings\n" );
        Abc_ExactTest( fVerbose );
        Abc_ExactStoreTest( fVerbose );
        return 0;
    }

    if ( argc == globalUtilOptind )
        goto usage;

    memset( pTruth, 0, 64 * sizeof(word) );
    while ( globalUtilOptind < argc )
    {
        if ( nFunc == 16 )
        {
            Abc_Print( -1, "Too many functions (at most 16 supported).\n" );
            goto usage;
        }
        nVarsTmp = Abc_TtReadHex( &pTruth[nFunc << 2], argv[globalUtilOptind++] );
        nFunc++;
        if ( nVars == 0 )
            nVars = nVarsTmp;
        else if ( nVars > 8 )
        {
            Abc_Print( -1, "Only 8-variable functions are supported.\n" );
            goto usage;
        }
        else if ( nVars != nVarsTmp )
        {
            Abc_Print( -1, "All functions need to have the same size.\n" );
            goto usage;
        }
    }

    if ( fMakeAIG )
    {
        pGiaRes = Gia_ManFindExact( pTruth, nVars, nFunc, nMaxDepth, fHasArrTimeProfile ? pArrTimeProfile : NULL, nBTLimit, nStartGates - 1, fVerbose );
        if ( pGiaRes )
            Abc_FrameUpdateGia( pAbc, pGiaRes );
        else
            Abc_Print( 0, "Could not find AIG within given resource constraints, retry with different value for -C.\n" );
    }
    else
    {
        pNtkRes = Abc_NtkFindExact( pTruth, nVars, nFunc, nMaxDepth, fHasArrTimeProfile ? pArrTimeProfile : NULL, nBTLimit, nStartGates - 1, fVerbose );
        if ( pNtkRes )
        {
            Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
            Abc_FrameClearVerifStatus( pAbc );
        }
        else
            Abc_Print( 0, "Could not find network within given resource constraints, retry with different value for -C.\n" );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: exact [-DSC <num>] [-A <list>] [-atvh] <truth1> <truth2> ...\n" );
    Abc_Print( -2, "\t           finds optimum networks using SAT-based exact synthesis for hex truth tables <truth1> <truth2> ...\n" );
    Abc_Print( -2, "\t-D <num>  : constrain maximum depth (if too low, algorithm may not terminate)\n" );
    Abc_Print( -2, "\t-A <list> : input arrival times (comma separated list)\n" );
    Abc_Print( -2, "\t-S <num>  : number of start gates in search [default = %d]\n", nStartGates );
    Abc_Print( -2, "\t-C <num>  : the limit on the number of conflicts; turn off with 0 [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-a        : toggle create AIG [default = %s]\n", fMakeAIG ? "yes" : "no" );
    Abc_Print( -2, "\t-t        : run test suite\n" );
    Abc_Print( -2, "\t-v        : toggle verbose printout [default = %s]\n", fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h        : print the command usage\n" );
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t            This command was contributed by Mathias Soeken from EPFL in July 2016.\n" );
    Abc_Print( -2, "\t            The author can be contacted as mathias.soeken at epfl.ch\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBmsStart( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_ExactIsRunning();
    extern void Abc_ExactStart( int nBTLimit, int fMakeAIG, int fVerbose, int fVeryVerbose, const char *pFilename );

    int c, fMakeAIG = 0, fVerbose = 0, fVeryVerbose = 0, nBTLimit = 100;
    char * pFilename = NULL;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Cavwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'a':
            fMakeAIG ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( argc > globalUtilOptind )
    {
        pFilename = argv[globalUtilOptind++];
    }

    if ( Abc_ExactIsRunning() )
    {
        Abc_Print( -1, "BMS manager is already started." );
        return 1;
    }

    Abc_ExactStart( nBTLimit, fMakeAIG, fVerbose, fVeryVerbose, pFilename );
    return 0;

usage:
    Abc_Print( -2, "usage: bms_start [-C <num>] [-avwh] [<file>]\n" );
    Abc_Print( -2, "\t           starts BMS manager for recording optimum networks\n" );
    Abc_Print( -2, "\t           if <file> is specified, store entries are read from that file\n" );
    Abc_Print( -2, "\t-C <num> : the limit on the number of conflicts [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-a       : toggle create AIG [default = %s]\n", fMakeAIG ? "yes" : "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-w       : toggle very verbose printout [default = %s]\n", fVeryVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t           This command was contributed by Mathias Soeken from EPFL in July 2016.\n" );
    Abc_Print( -2, "\t           The author can be contacted as mathias.soeken at epfl.ch\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBmsStop( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_ExactIsRunning();
    extern void Abc_ExactStop( const char *pFilename );

    int c;
    char * pFilename = NULL;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( argc > globalUtilOptind )
    {
        pFilename = argv[globalUtilOptind++];
    }

    if ( !Abc_ExactIsRunning() )
    {
        Abc_Print( -1, "BMS manager is not started." );
        return 1;
    }

    Abc_ExactStop( pFilename );
    return 0;

usage:
    Abc_Print( -2, "usage: bms_stop [-C <num>] [-vh] [<file>]\n" );
    Abc_Print( -2, "\t           stops BMS manager for recording optimum networks\n" );
    Abc_Print( -2, "\t           if <file> is specified, store entries are written to that file\n" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t           This command was contributed by Mathias Soeken from EPFL in July 2016.\n" );
    Abc_Print( -2, "\t           The author can be contacted as mathias.soeken at epfl.ch\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBmsPs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_ExactIsRunning();
    extern void Abc_ExactStats();

    int c;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( !Abc_ExactIsRunning() )
    {
        Abc_Print( -1, "BMS manager is not started." );
        return 1;
    }

    Abc_ExactStats();
    return 0;

usage:
    Abc_Print( -2, "usage: bms_ps [-h]\n" );
    Abc_Print( -2, "\t           shows statistics about BMS manager\n" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t           This command was contributed by Mathias Soeken from EPFL in July 2016.\n" );
    Abc_Print( -2, "\t           The author can be contacted as mathias.soeken at epfl.ch\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMajExact( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Maj_ManExactSynthesis( int nVars, int nNodes, int fUseConst, int fUseLine, int fVerbose );
    extern int Maj_ManExactSynthesis2( int nVars, int nNodes, int fUseConst, int fUseLine, int fUseRand, int nRands, int fVerbose );
    int c, nVars = 3, nNodes = 1, fUseConst = 0, fUseLine = 0, fGlucose = 0, fUseRand = 0, nRands = 0, fVerbose = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "INRfcrgvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodes < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRands = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRands < 0 )
                goto usage;
            break;
        case 'f':
            fUseConst ^= 1;
            break;
        case 'c':
            fUseLine ^= 1;
            break;
        case 'r':
            fUseRand ^= 1;
            break;
        case 'g':
            fGlucose ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( (nVars & 1) == 0 )
    {
        Abc_Print( -1, "Cannot sythesize MAJ gate with an even number of inputs (%d).\n", nVars );
        return 1;
    }
    if ( fGlucose )
        Maj_ManExactSynthesis( nVars, nNodes, fUseConst, fUseLine, fVerbose );
    else
        Maj_ManExactSynthesis2( nVars, nNodes, fUseConst, fUseLine, fUseRand, nRands, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: majexact [-INR <num>] [-fcrgvh]\n" );
    Abc_Print( -2, "\t           exact synthesis of multi-input MAJ using MAJ3 gates\n" );
    Abc_Print( -2, "\t-I <num> : the number of input variables [default = %d]\n", nVars );
    Abc_Print( -2, "\t-N <num> : the number of MAJ3 nodes [default = %d]\n", nNodes );
    Abc_Print( -2, "\t-R <num> : the number of additional connections [default = %d]\n", nRands );
    Abc_Print( -2, "\t-f       : toggle using constant fanins [default = %s]\n", fUseConst ? "yes" : "no" );
    Abc_Print( -2, "\t-c       : toggle using cascade topology [default = %s]\n", fUseLine ? "yes" : "no" );
    Abc_Print( -2, "\t-r       : toggle using random topology [default = %s]\n", fUseRand ? "yes" : "no" );
    Abc_Print( -2, "\t-g       : toggle using Glucose 3.0 by Gilles Audemard and Laurent Simon [default = %s]\n", fGlucose ? "yes" : "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTwoExact( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Exa_ManExactSynthesis( Bmc_EsPar_t * pPars );
    extern void Exa_ManExactSynthesis2( Bmc_EsPar_t * pPars );
    extern void Exa_ManExactSynthesis4( Bmc_EsPar_t * pPars );
    extern void Exa_ManExactSynthesis5( Bmc_EsPar_t * pPars );
    extern void Exa_ManExactSynthesis6( Bmc_EsPar_t * pPars, char * pFileName );
    int c, fKissat = 0, fKissat2 = 0;
    Bmc_EsPar_t Pars, * pPars = &Pars;
    Bmc_EsParSetDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "INTadconugklvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVars < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNodes < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->RuntimeLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->RuntimeLim < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fOnlyAnd ^= 1;
            break;
        case 'd':
            pPars->fDynConstr ^= 1;
            break;
        case 'c':
            pPars->fDumpCnf ^= 1;
            break;
        case 'o':
            pPars->fFewerVars ^= 1;
            break;
        case 'n':
            pPars->fOrderNodes ^= 1;
            break;
        case 'u':
            pPars->fUniqFans ^= 1;
            break;
        case 'g':
            pPars->fGlucose ^= 1;
            break;
        case 'k':
            fKissat ^= 1;
            break;
        case 'l':
            fKissat2 ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
    {
        if ( strstr(argv[globalUtilOptind], ".") )
        {
            Exa_ManExactSynthesis6( pPars, argv[globalUtilOptind] );
            return 0;
        }
        pPars->pTtStr = argv[globalUtilOptind];
    }
    if ( pPars->pTtStr == NULL )
    {
        Abc_Print( -1, "Truth table should be given on the command line.\n" );
        return 1;
    }
    if ( (1 << (pPars->nVars-2)) != (int)strlen(pPars->pTtStr) )
    {
        Abc_Print( -1, "Truth table is expected to have %d hex digits (instead of %d).\n", (1 << (pPars->nVars-2)), strlen(pPars->pTtStr) );
        return 1;
    }
    if ( pPars->nVars > pPars->nNodes * (2 - 1) + 1 )
    {
        Abc_Print( -1, "Function with %d variales cannot be implemented with %d two-input gates.\n", pPars->nVars, pPars->nNodes );
        return 1;
    }
    if ( pPars->nVars > 10 )
    {
        Abc_Print( -1, "Function should not have more than 10 inputs.\n" );
        return 1;
    }
    if ( fKissat )
        Exa_ManExactSynthesis4( pPars );
    else if ( fKissat2 )
        Exa_ManExactSynthesis5( pPars );
    else if ( pPars->fGlucose )
        Exa_ManExactSynthesis( pPars );
    else
        Exa_ManExactSynthesis2( pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: twoexact [-INT <num>] [-adconugklvh] <hex>\n" );
    Abc_Print( -2, "\t           exact synthesis of multi-input function using two-input gates\n" );
    Abc_Print( -2, "\t-I <num> : the number of input variables [default = %d]\n", pPars->nVars );
    Abc_Print( -2, "\t-N <num> : the number of two-input nodes [default = %d]\n", pPars->nNodes );
    Abc_Print( -2, "\t-T <num> : the runtime limit in seconds [default = %d]\n", pPars->RuntimeLim );
    Abc_Print( -2, "\t-a       : toggle using only AND-gates (without XOR-gates) [default = %s]\n", pPars->fOnlyAnd ? "yes" : "no" );
    Abc_Print( -2, "\t-d       : toggle using dynamic constraint addition [default = %s]\n", pPars->fDynConstr ? "yes" : "no" );
    Abc_Print( -2, "\t-c       : toggle dumping CNF into a file [default = %s]\n", pPars->fDumpCnf ? "yes" : "no" );
    Abc_Print( -2, "\t-o       : toggle using additional optimizations [default = %s]\n", pPars->fFewerVars ? "yes" : "no" );
    Abc_Print( -2, "\t-n       : toggle ordering internal nodes [default = %s]\n", pPars->fOrderNodes ? "yes" : "no" );
    Abc_Print( -2, "\t-u       : toggle using unique fanouts [default = %s]\n", pPars->fUniqFans ? "yes" : "no" );
    Abc_Print( -2, "\t-g       : toggle using Glucose 3.0 by Gilles Audemard and Laurent Simon [default = %s]\n", pPars->fGlucose ? "yes" : "no" );
    Abc_Print( -2, "\t-k       : toggle using Kissat by Armin Biere [default = %s]\n", fKissat ? "yes" : "no" );
    Abc_Print( -2, "\t-l       : toggle using Kissat by Armin Biere [default = %s]\n", fKissat2 ? "yes" : "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", pPars->fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    Abc_Print( -2, "\t<hex>    : truth table in hex notation\n" );
    Abc_Print( -2, "\t           \n" );
    Abc_Print( -2, "\t           For example, command line \"twoexact -g -I 5 -N 12 169AE443\"\n" );
    Abc_Print( -2, "\t           synthesizes the smallest circuit composed of two-input gates\n" );
    Abc_Print( -2, "\t           for the only NPN class of 5-input functions that requires 12 gates;\n" );
    Abc_Print( -2, "\t           all other functions can be realized with 11 two-input gates or less\n" );
    Abc_Print( -2, "\t           (see Section 7.1.2 \"Boolean evaluation\" in the book by Donald Knuth\n" );
    Abc_Print( -2, "\t           http://www.cs.utsa.edu/~wagner/knuth/fasc0c.pdf)\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandLutExact( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Exa3_ManExactSynthesis( Bmc_EsPar_t * pPars );
    extern void Exa3_ManExactSynthesis2( Bmc_EsPar_t * pPars );
    int c;
    Bmc_EsPar_t Pars, * pPars = &Pars;
    Bmc_EsParSetDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "INKTiaogvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVars < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNodes < 0 )
                goto usage;
            break;
       case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->RuntimeLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->RuntimeLim < 0 )
                goto usage;
            break;
        case 'i':
            pPars->fUseIncr ^= 1;
            break;
        case 'a':
            pPars->fOnlyAnd ^= 1;
            break;
        case 'o':
            pPars->fFewerVars ^= 1;
            break;
        case 'g':
            pPars->fGlucose ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
        pPars->pTtStr = argv[globalUtilOptind];
    if ( pPars->pTtStr == NULL )
    {
        Abc_Print( -1, "Truth table should be given on the command line.\n" );
        return 1;
    }
    if ( (1 << (pPars->nVars-2)) != (int)strlen(pPars->pTtStr) )
    {
        Abc_Print( -1, "Truth table is expected to have %d hex digits (instead of %d).\n", (1 << (pPars->nVars-2)), strlen(pPars->pTtStr) );
        return 1;
    }
    if ( pPars->nVars > pPars->nNodes * (pPars->nLutSize - 1) + 1 )
    {
        Abc_Print( -1, "Function with %d variales cannot be implemented with %d %d-input LUTs.\n", pPars->nVars, pPars->nNodes, pPars->nLutSize );
        return 1;
    }
    if ( pPars->nVars > 10 )
    {
        Abc_Print( -1, "Function should not have more than 10 inputs.\n" );
        return 1;
    }
    if ( pPars->nLutSize > 6 )
    {
        Abc_Print( -1, "Node size should not be more than 6 inputs.\n" );
        return 1;
    }
    if ( pPars->fGlucose )
        Exa3_ManExactSynthesis( pPars );
    else
        Exa3_ManExactSynthesis2( pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: lutexact [-INKT <num>] [-iaogvh] <hex>\n" );
    Abc_Print( -2, "\t           exact synthesis of I-input function using N K-input gates\n" );
    Abc_Print( -2, "\t-I <num> : the number of input variables [default = %d]\n", pPars->nVars );
    Abc_Print( -2, "\t-N <num> : the number of K-input nodes [default = %d]\n", pPars->nNodes );
    Abc_Print( -2, "\t-K <num> : the number of node fanins [default = %d]\n", pPars->nLutSize );
    Abc_Print( -2, "\t-T <num> : the runtime limit in seconds [default = %d]\n", pPars->RuntimeLim );
    Abc_Print( -2, "\t-i       : toggle using incremental solving [default = %s]\n", pPars->fUseIncr ? "yes" : "no" );
    Abc_Print( -2, "\t-a       : toggle using only AND-gates when K = 2 [default = %s]\n", pPars->fOnlyAnd ? "yes" : "no" );
    Abc_Print( -2, "\t-o       : toggle using additional optimizations [default = %s]\n", pPars->fFewerVars ? "yes" : "no" );
    Abc_Print( -2, "\t-g       : toggle using Glucose 3.0 by Gilles Audemard and Laurent Simon [default = %s]\n", pPars->fGlucose ? "yes" : "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", pPars->fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    Abc_Print( -2, "\t<hex>    : truth table in hex notation\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAllExact( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Zyx_ManExactSynthesis( Bmc_EsPar_t * pPars );
    int c;
    Bmc_EsPar_t Pars, * pPars = &Pars;
    Bmc_EsParSetDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "MINKianegvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMajSupp = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMajSupp < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVars < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNodes < 0 )
                goto usage;
            break;
       case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 0 )
                goto usage;
            break;
        case 'i':
            pPars->fUseIncr ^= 1;
            break;
        case 'a':
            pPars->fOnlyAnd ^= 1;
            break;
        case 'n':
            pPars->fOrderNodes ^= 1;
            break;
        case 'e':
            pPars->fEnumSols ^= 1;
            break;
        case 'g':
            pPars->fGlucose ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pPars->nMajSupp > 0 )
    {
        if ( pPars->nMajSupp != 5 && pPars->nMajSupp != 7 && pPars->nMajSupp != 9 )
        {
            Abc_Print( -1, "Currently only support majority with 5, 7 or 9 inputs.\n" );
            return 1;
        }
        pPars->nVars = pPars->nMajSupp;
        pPars->nLutSize = 3;
        pPars->fMajority = 1;
        pPars->fUseIncr = 1;
        if ( pPars->nNodes == 0 )
        {
            if ( pPars->nMajSupp == 5 )
                pPars->nNodes = 4;
            if ( pPars->nMajSupp == 7 )
                pPars->nNodes = 7;
            if ( pPars->nMajSupp == 9 )
                pPars->nNodes = 10;
        }
    }
    else
    {
        if ( pPars->nVars == 0 )
        {
            Abc_Print( -1, "The number of variables (-I num) needs to be specified on the command line.\n" );
            return 1;
        }
        if ( pPars->nNodes == 0 )
        {
            Abc_Print( -1, "The number of nodes (-N num) needs to be specified on the command line.\n" );
            return 1;
        }
        if ( argc == globalUtilOptind + 1 )
            pPars->pTtStr = argv[globalUtilOptind];
        if ( pPars->pTtStr == NULL )
        {
            Abc_Print( -1, "Truth table should be given on the command line.\n" );
            return 1;
        }
        if ( (1 << (pPars->nVars-2)) != (int)strlen(pPars->pTtStr) )
        {
            Abc_Print( -1, "Truth table is expected to have %d hex digits (instead of %d).\n", (1 << (pPars->nVars-2)), strlen(pPars->pTtStr) );
            return 1;
        }
    }
    if ( pPars->nVars > pPars->nNodes * (pPars->nLutSize - 1) + 1 )
    {
        Abc_Print( -1, "Function with %d variales cannot be implemented with %d %d-input LUTs.\n", pPars->nVars, pPars->nNodes, pPars->nLutSize );
        return 1;
    }
    if ( pPars->nVars > 10 )
    {
        Abc_Print( -1, "Function should not have more than 10 inputs.\n" );
        return 1;
    }
    if ( pPars->nLutSize > 6 )
    {
        Abc_Print( -1, "Node size should not be more than 6 inputs.\n" );
        return 1;
    }
    if ( !pPars->fUseIncr )
    {
        if ( pPars->fMajority )
        {
            Abc_Print( -1, "Cannot synthesize majority in the non-incremental mode (use \'-i\').\n" );
            return 1;
        }
        if ( pPars->nLutSize > 3 )
        {
            Abc_Print( -1, "Cannot synthesize LUT4 and larger in non-incremental mode (use \'-i\').\n" );
            return 1;
        }
    }
    Zyx_ManExactSynthesis( pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: allexact [-MIKN <num>] [-ianevh] <hex>\n" );
    Abc_Print( -2, "\t           exact synthesis of I-input function using N K-input gates\n" );
    Abc_Print( -2, "\t-M <num> : the majority support size (overrides -I and -K) [default = %d]\n", pPars->nMajSupp );
    Abc_Print( -2, "\t-I <num> : the number of input variables [default = %d]\n", pPars->nVars );
    Abc_Print( -2, "\t-K <num> : the number of node fanins [default = %d]\n", pPars->nLutSize );
    Abc_Print( -2, "\t-N <num> : the number of K-input nodes [default = %d]\n", pPars->nNodes );
    Abc_Print( -2, "\t-i       : toggle using incremental solving [default = %s]\n", pPars->fUseIncr ? "yes" : "no" );
    Abc_Print( -2, "\t-a       : toggle using only AND-gates when K = 2 [default = %s]\n", pPars->fOnlyAnd ? "yes" : "no" );
    Abc_Print( -2, "\t-n       : toggle using node ordering by fanins [default = %s]\n", pPars->fOrderNodes ? "yes" : "no" );
    Abc_Print( -2, "\t-e       : toggle enumerating all solutions [default = %s]\n", pPars->fEnumSols ? "yes" : "no" );
//    Abc_Print( -2, "\t-g       : toggle using Glucose 3.0 by Gilles Audemard and Laurent Simon [default = %s]\n", pPars->fGlucose ? "yes" : "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", pPars->fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    Abc_Print( -2, "\t<hex>    : truth table in hex notation\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestExact( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Zyx_TestExact( char * pFileName );
    char * pFileName = NULL;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
       case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
        pFileName = argv[globalUtilOptind];
    if ( pFileName == NULL )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    Zyx_TestExact( pFileName );
    return 0;

usage:
    Abc_Print( -2, "usage: testexact <file>\n" );
    Abc_Print( -2, "\t           tests solution of the exact synthesis problem\n" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    Abc_Print( -2, "\t<file>   : file name in the specified format\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMajGen( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gem_Enumerate( int nVars, int fDump, int fVerbose );
    int c, nVars = 8, fDump = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ndvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 0 )
                goto usage;
            break;
        case 'd':
            fDump ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    Gem_Enumerate( nVars, fDump, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: majgen [-N <num>] [-dvh]>\n" );
    Abc_Print( -2, "\t           generates networks for majority gates\n" );
    Abc_Print( -2, "\t-N <num> : the maximum number of variables [default = %d]\n", nVars );
    Abc_Print( -2, "\t-d       : toggle dumping functions into a file [default = %s]\n", fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose ? "yes" : "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandLogic( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash( pNtk ) )
    {
        Abc_Print( -1, "This command is only applicable to strashed networks.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkToLogic( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Converting to a logic network has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: logic [-h]\n" );
    Abc_Print( -2, "\t        transforms an AIG into a logic network with SOPs\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandComb( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fRemoveLatches;
    int nLatchesToAdd;
    extern void Abc_NtkMakeSeq( Abc_Ntk_t * pNtk, int nLatchesToAdd );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fRemoveLatches = 0;
    nLatchesToAdd = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Llh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLatchesToAdd = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLatchesToAdd < 0 )
                goto usage;
            break;
        case 'l':
            fRemoveLatches ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsComb(pNtk) && nLatchesToAdd == 0 )
    {
        Abc_Print( -1, "The network is already combinational.\n" );
        return 0;
    }
    if ( !Abc_NtkIsComb(pNtk) && nLatchesToAdd != 0 )
    {
        Abc_Print( -1, "The network is already combinational.\n" );
        return 0;
    }

    // get the new network
    pNtkRes = Abc_NtkDup( pNtk );
    if ( nLatchesToAdd )
        Abc_NtkMakeSeq( pNtkRes, nLatchesToAdd );
    else
        Abc_NtkMakeComb( pNtkRes, fRemoveLatches );
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: comb [-L <num>] [-lh]\n" );
    Abc_Print( -2, "\t           converts comb network into seq, and vice versa\n" );
    Abc_Print( -2, "\t-L <num> : number of latches to add to comb network (0 = do not add) [default = %d]\n", nLatchesToAdd );
    Abc_Print( -2, "\t-l       : toggle converting latches to PIs/POs or removing them [default = %s]\n", fRemoveLatches? "remove": "convert" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMiter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[32];
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2, * pNtkRes;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int nArgcNew;
    int c;
    int fCheck;
    int fComb;
    int fImplic;
    int fMulti;
    int nPartSize;
    int fTrans;
    int fIgnoreNames;

    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    fComb  = 0;
    fCheck = 1;
    fImplic = 0;
    fMulti = 0;
    nPartSize = 0;
    fTrans = 0;
    fIgnoreNames = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Pcmitnh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPartSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPartSize < 0 )
                goto usage;
            break;
        case 'c':
            fComb ^= 1;
            break;
        case 'm':
            fMulti ^= 1;
            break;
        case 'i':
            fImplic ^= 1;
            break;
        case 't':
            fTrans ^= 1;
            break;
        case 'n':
            fIgnoreNames ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( fTrans )
    {
        if ( (Abc_NtkPoNum(pNtk) & 1) == 1 )
        {
            Abc_Print( -1, "Abc_CommandMiter(): The number of outputs should be even.\n" );
            return 0;
        }
        // replace the current network
        pNtkRes = Abc_NtkDupTransformMiter( pNtk );
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        Abc_Print( 1, "The miter (current network) is transformed by XORing POs pair-wise.\n" );
        return 0;
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
        return 1;

    if ( fIgnoreNames )
    {
        if ( !fDelete1 )
        {
            pNtk1 = Abc_NtkStrash( pNtk1, 0, 1, 0 );
            fDelete1 = 1;
        }
        if ( !fDelete2 )
        {
            pNtk2 = Abc_NtkStrash( pNtk2, 0, 1, 0 );
            fDelete2 = 1;
        }
        Abc_NtkShortNames( pNtk1 );
        Abc_NtkShortNames( pNtk2 );
    }
    // compute the miter
    pNtkRes = Abc_NtkMiter( pNtk1, pNtk2, fComb, nPartSize, fImplic, fMulti );
    if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
    if ( fDelete2 ) Abc_NtkDelete( pNtk2 );

    // get the new network
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Miter computation has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    if ( nPartSize == 0 )
        strcpy( Buffer, "unused" );
    else
        sprintf(Buffer, "%d", nPartSize );
    Abc_Print( -2, "usage: miter [-P <num>] [-cimtnh] <file1> <file2>\n" );
    Abc_Print( -2, "\t           computes the miter of the two circuits\n" );
    Abc_Print( -2, "\t-P <num> : output partition size [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-c       : toggles deriving combinational miter (latches as POs) [default = %s]\n", fComb? "yes": "no" );
    Abc_Print( -2, "\t-i       : toggles deriving implication miter (file1 => file2) [default = %s]\n", fImplic? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles creating multi-output miter [default = %s]\n", fMulti? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggle XORing pair-wise POs of the miter [default = %s]\n", fTrans? "yes": "no" );
    Abc_Print( -2, "\t-n       : toggle ignoring names when matching CIs/COs [default = %s]\n", fIgnoreNames? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\tfile1    : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2    : (optional) the file with the second network\n");
    Abc_Print( -2, "\t           if no files are given, uses the current network and its spec\n");
    Abc_Print( -2, "\t           if one file is given, uses the current network and the file\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMiter2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Ptr_t * Abc_NtkReadNodeNames( Abc_Ntk_t * pNtk, char * pFileName );
    extern Abc_Ntk_t * Abc_NtkSpecialMiter( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes );

    Abc_Ntk_t * pNtk, * pNtkRes;
    Vec_Ptr_t * vNodes;
    char * pFileName;
    int c, fVerbose = 0;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    // get the second network
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "The file with node names is not given.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "The base network should be logic network from BLIF file.\n" );
        return 1;
    }
    // read the second network
    pFileName = argv[globalUtilOptind];
    if ( (vNodes = Abc_NtkReadNodeNames(pNtk, pFileName)) == NULL )
    {
        Abc_Print( -1, "Cannot read node names from file \"%s\".\n", pFileName );
        return 1;
    }
    pNtkRes = Abc_NtkSpecialMiter( pNtk, vNodes );
    Vec_PtrFree( vNodes );
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: miter2 [-h] <file>\n" );
    Abc_Print( -2, "\t         derives specialized miter\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file name with node names\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDemiter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c, fDual, fVerbose;
    extern int Abc_NtkDarDemiter( Abc_Ntk_t * pNtk );
    extern int Abc_NtkDarDemiterDual( Abc_Ntk_t * pNtk, int fVerbose );
    // set defaults
    fDual = 0;
    fVerbose = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "dvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'd':
            fDual ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The network is not strashed.\n" );
        return 1;
    }

    if ( fDual )
    {
        if ( (Abc_NtkPoNum(pNtk) & 1) )
        {
            Abc_Print( -1, "The number of POs should be even.\n" );
            return 0;
        }
        if ( !Abc_NtkDarDemiterDual( pNtk, fVerbose ) )
        {
            Abc_Print( -1, "Demitering has failed.\n" );
            return 1;
        }
        return 0;
    }
/*
    if ( Abc_NtkPoNum(pNtk) != 1 )
    {
        Abc_Print( -1, "The network is not a single-output miter.\n" );
        return 1;
    }
    if ( !Abc_NodeIsExorType(Abc_ObjFanin0(Abc_NtkPo(pNtk,0))) )
    {
        Abc_Print( -1, "The miter's PO is not an EXOR.\n" );
        return 1;
    }
    if ( !Abc_NtkDemiter( pNtk ) )
    {
        Abc_Print( -1, "Demitering has failed.\n" );
        return 1;
    }
*/
    // get the new network
    if ( !Abc_NtkDarDemiter( pNtk ) )
    {
        Abc_Print( -1, "Demitering has failed.\n" );
        return 1;
    }
    // replace the current network
//    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: demiter [-dvh]\n" );
    Abc_Print( -2, "\t        splits sequential miter into two circuits\n" );
    Abc_Print( -2, "\t-d    : expects a dual-output miter (without XORs) [default = %s]\n", fDual? "yes": "no" );
    Abc_Print( -2, "\t-v    : toggles outputting verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandOrPos( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);//, * pNtkRes;
    int fReverse = 0;
    int fComb = 0;
    int fXor = 0;
    int c;
    extern int Abc_NtkCombinePos( Abc_Ntk_t * pNtk, int fAnd, int fXor );

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "rxh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'r':
            fReverse ^= 1;
            break;
        case 'x':
            fXor ^= 1;
            break;
        case 'c':
            fComb ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The network is not strashed.\n" );
        return 1;
    }
    // get the new network
    if ( fReverse )
    {
        extern Aig_Man_t * Abc_NtkToDarBmc( Abc_Ntk_t * pNtk, Vec_Int_t ** pvMap );
        Aig_Man_t * pMan = Abc_NtkToDarBmc( pNtk, NULL );
        Abc_Ntk_t * pNtkRes = Abc_NtkFromAigPhase( pMan );
        Aig_ManStop( pMan );
        // perform expansion
        if ( Abc_NtkPoNum(pNtk) != Abc_NtkPoNum(pNtkRes) )
            Abc_Print( 1,"Expanded %d outputs into %d outputs using OR decomposition.\n", Abc_NtkPoNum(pNtk), Abc_NtkPoNum(pNtkRes) );
        else
            Abc_Print( 1,"The output(s) cannot be structurally decomposed.\n" );
        // clear counter-example
        if ( pAbc->pCex )
            ABC_FREE( pAbc->pCex );
        // replace the current network
        ABC_FREE( pNtkRes->pName );
        pNtkRes->pName = Extra_UtilStrsav(pNtk->pName);
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    }
    else
    {
        if ( !Abc_NtkCombinePos( pNtk, 0, fXor ) )
        {
            Abc_Print( -1, "ORing the POs has failed.\n" );
            return 1;
        }
        // update counter-example
        if ( pAbc->pCex )
            pAbc->pCex->iPo = 0;
        // replace the current network
    //    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: orpos [-rxh]\n" );
    Abc_Print( -2, "\t        creates single-output miter by ORing the POs of the current network\n" );
    Abc_Print( -2, "\t-r    : performs the reverse transform (OR decomposition) [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-x    : toggles combining the PO using XOR [default = %s]\n", fXor? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAndPos( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);//, * pNtkRes;
    int fComb = 0;
    int c;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ch" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fComb ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The network is not strashed.\n" );
        return 1;
    }

    if ( Abc_NtkPoNum(pNtk) == 1 )
    {
        Abc_Print( -1, "The network already has one PO.\n" );
        return 1;
    }

    if ( Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The miter has latches. ORing is not performed.\n" );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkCombinePos( pNtk, 1, 0 ) )
    {
        Abc_Print( -1, "ANDing the POs has failed.\n" );
        return 1;
    }
    // replace the current network
//    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: andpos [-h]\n" );
    Abc_Print( -2, "\t        creates single-output miter by ANDing the POs of the current network\n" );
//    Abc_Print( -2, "\t-c    : computes combinational miter (latches as POs) [default = %s]\n", fComb? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandZeroPo( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);//, * pNtkRes = NULL;
    int c, iOutput = -1;
    int fSkipSweep = 0;
    int fUseConst1 = 0;
    extern void Abc_NtkDropOneOutput( Abc_Ntk_t * pNtk, int iOutput, int fSkipSweep, int fUseConst1 );

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nsoh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            iOutput = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iOutput < 0 )
                goto usage;
            break;
        case 's':
            fSkipSweep ^= 1;
            break;
        case 'o':
            fUseConst1 ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The network is not strashed.\n" );
        return 1;
    }
    if ( iOutput < 0 )
    {
        Abc_Print( -1, "The output index is not specified.\n" );
        return 1;
    }
    if ( iOutput >= Abc_NtkPoNum(pNtk) )
    {
        Abc_Print( -1, "The output index is larger than the allowed POs.\n" );
        return 1;
    }

    // get the new network
//    pNtkRes = Abc_NtkDup( pNtk );
//    Abc_NtkDropOneOutput( pNtkRes, iOutput );
//    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    Abc_NtkDropOneOutput( pNtk, iOutput, fSkipSweep, fUseConst1 );
    return 0;

usage:
    Abc_Print( -2, "usage: zeropo [-N <num>] [-soh]\n" );
    Abc_Print( -2, "\t           replaces the PO driver by constant 0\n" );
    Abc_Print( -2, "\t-N <num> : the zero-based index of the PO to replace [default = %d]\n", iOutput );
    Abc_Print( -2, "\t-s       : performs comb sweep after removimg a PO [default = %s]\n", !fSkipSweep? "yes": "no" );
    Abc_Print( -2, "\t-o       : toggles using const 1 instead of const 0 [default = %s]\n", fUseConst1? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSwapPos( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkRes;
    int c, iOutput = -1;
    extern void Abc_NtkSwapOneOutput( Abc_Ntk_t * pNtk, int iOutput );

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            iOutput = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iOutput < 0 )
                goto usage;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The network is not strashed.\n" );
        return 1;
    }
    if ( iOutput < 0 )
    {
        Abc_Print( -1, "The output index is not specified.\n" );
        return 1;
    }
    if ( iOutput >= Abc_NtkPoNum(pNtk) )
    {
        Abc_Print( -1, "The output index is larger than the allowed POs.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkDup( pNtk );
    Abc_NtkSwapOneOutput( pNtkRes, iOutput );
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: swappos [-N <num>] [-h]\n" );
    Abc_Print( -2, "\t           swap the 0-th PO with the <num>-th PO\n" );
    Abc_Print( -2, "\t-N <num> : the zero-based index of the PO to swap [default = %d]\n", iOutput );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRemovePo( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);//, * pNtkRes = NULL;
    int c, iOutput = -1;
    int fRemoveConst0 = 1;
    extern void Abc_NtkRemovePo( Abc_Ntk_t * pNtk, int iOutput, int fRemoveConst0 );

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nzh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            iOutput = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iOutput < 0 )
                goto usage;
            break;
        case 'z':
            fRemoveConst0 ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The network is not strashed.\n" );
        return 1;
    }
    if ( iOutput < 0 )
    {
        Abc_Print( -1, "The output index is not specified.\n" );
        return 1;
    }
    if ( iOutput >= Abc_NtkPoNum(pNtk) )
    {
        Abc_Print( -1, "The output index is larger than the allowed POs.\n" );
        return 1;
    }

    // get the new network
//    pNtkRes = Abc_NtkDup( pNtk );
//    Abc_NtkRemovePo( pNtkRes, iOutput );
//    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    Abc_NtkRemovePo( pNtk, iOutput, fRemoveConst0 );
    return 0;

usage:
    Abc_Print( -2, "usage: removepo [-N <num>] [-zh]\n" );
    Abc_Print( -2, "\t           remove PO with number <num> if it is const0\n" );
    Abc_Print( -2, "\t-N <num> : the zero-based index of the PO to remove [default = %d]\n", iOutput );
    Abc_Print( -2, "\t-z       : toggle removing const1 instead of const0 [default = %s]\n", fRemoveConst0? "const0": "const1" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDropSat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkDropSatOutputs( Abc_Ntk_t * pNtk, Vec_Ptr_t * vCexes, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkRes = NULL;
    int fNoSweep = 0;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "svh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fNoSweep ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for AIGs (run \"strash\").\n" );
        return 1;
    }
    if ( pAbc->vCexVec == NULL )
    {
        Abc_Print( -1, "CEX array is not defined. Run \"bmc3 -az\", \"sim3 -az\", or \"pdr -az\".\n" );
        return 1;
    }
    if ( Vec_PtrSize(pAbc->vCexVec) != Abc_NtkPoNum(pNtk) )
    {
        Abc_Print( -1, "CEX array size (%d) does not match the number of outputs (%d).\n", Vec_PtrSize(pAbc->vCexVec), Abc_NtkPoNum(pNtk) );
        return 1;
    }
    Abc_NtkDropSatOutputs( pNtk, pAbc->vCexVec, fVerbose );
    if ( !fNoSweep )
    {
        pNtkRes = Abc_NtkDarLatchSweep( pNtk, 1, 1, 1, 0, -1, -1, 0, 0 );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "Removing SAT outputs has failed.\n" );
            return 1;
        }
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dropsat [-sh]\n" );
    Abc_Print( -2, "\t         replaces satisfiable POs by constant 0 and cleans up the AIG\n" );
    Abc_Print( -2, "\t-s     : toggles skipping sequential sweep [default = %s]\n", fNoSweep? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAddPi( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkRes;
    int c;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkDup( pNtk );
    if ( Abc_NtkPiNum(pNtkRes) == 0 )
    {
        Abc_Obj_t * pObj = Abc_NtkCreatePi( pNtkRes );
        Abc_ObjAssignName( pObj, "dummy_pi", NULL );
        Abc_NtkOrderCisCos( pNtkRes );
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: addpi [-h]\n" );
    Abc_Print( -2, "\t         if the network has no PIs, add one dummy PI\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAppend( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtk2;
    char * FileName;
    int fComb = 0;
    int c;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ch" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fComb ^= 1;
            break;
        default:
            goto usage;
        }
    }

    // get the second network
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "The network to append is not given.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "The base network should be strashed for the appending to work.\n" );
        return 1;
    }

    // read the second network
    FileName = argv[globalUtilOptind];
    pNtk2 = Io_Read( FileName, Io_ReadFileType(FileName), 1, 0 );
    if ( pNtk2 == NULL )
        return 1;

    // check if the second network is combinational
    if ( Abc_NtkLatchNum(pNtk2) )
    {
        Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "The second network has latches. Appending does not work for such networks.\n" );
        return 0;
    }

    // get the new network
    if ( !Abc_NtkAppend( pNtk, pNtk2, 1 ) )
    {
        Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "Appending the networks failed.\n" );
        return 1;
    }
    Abc_NtkDelete( pNtk2 );
    // sweep dangling logic
    Abc_AigCleanup( (Abc_Aig_t *)pNtk->pManFunc );
    // replace the current network
//    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: append [-h] <file>\n" );
    Abc_Print( -2, "\t         appends a combinational network on top of the current network\n" );
//    Abc_Print( -2, "\t-c     : computes combinational miter (latches as POs) [default = %s]\n", fComb? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file name with the second network\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPutOnTop( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkPutOnTop( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtk2 );

    Abc_Ntk_t * pNtk, * pNtk2, * pNtkRes = NULL;
    char * FileName;
    int fComb = 0;
    int c;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ch" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fComb ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( argc > globalUtilOptind + 1 )
    {
        for ( c = 1; c < argc; c++ )
        {
            Abc_Ntk_t * pTemp, * pLogic = Io_Read( argv[c], Io_ReadFileType(argv[c]), 1, 0 );
            if ( pLogic == NULL )
                return 1;
            if ( Abc_NtkIsStrash(pLogic) )
            {
                pLogic = Abc_NtkToLogic( pTemp = pLogic );
                Abc_NtkDelete( pTemp );
            }
            if ( pLogic == NULL )
                return 1;
            if ( pNtkRes == NULL )
                pNtkRes = pLogic;
            else
            {
                pNtkRes = Abc_NtkPutOnTop( pTemp = pNtkRes, pLogic );
                Abc_NtkDelete( pTemp );
                Abc_NtkDelete( pLogic );
                if ( pNtkRes == NULL )
                    return 1;
            }
        }
        assert( Abc_NtkIsLogic(pNtkRes) );
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        return 0;
    }

    // get the second network
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "The network to append is not given.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "The base network should be in the logic form.\n" );
        return 1;
    }

    // check if the second network is combinational
    if ( Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The current network has latches. This command does not work for such networks.\n" );
        return 0;
    }

    // read the second network
    FileName = argv[globalUtilOptind];
    pNtk2 = Io_Read( FileName, Io_ReadFileType(FileName), 1, 0 );
    if ( pNtk2 == NULL )
        return 1;

    // check if the second network is combinational
    if ( Abc_NtkLatchNum(pNtk2) )
    {
        Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "The second network has latches. This command does not work for such networks.\n" );
        return 0;
    }
    // compare inputs/outputs
    if ( Abc_NtkPoNum(pNtk) != Abc_NtkPiNum(pNtk2) )
    {
        Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "The PO count (%d) of the first network is not equal to PI count (%d) of the second network.\n", Abc_NtkPoNum(pNtk), Abc_NtkPiNum(pNtk2) );
        return 0;
    }

    // get the new network
    if ( Abc_NtkIsLogic(pNtk2) )
        pNtkRes = Abc_NtkPutOnTop( pNtk, pNtk2 );
    else if ( Abc_NtkIsStrash(pNtk2) )
    {
        Abc_Ntk_t * pLogic = Abc_NtkToLogic( pNtk2 );
        pNtkRes = Abc_NtkPutOnTop( pNtk, pLogic );
        Abc_NtkDelete( pLogic );
    }
    else assert( 0 );
    Abc_NtkDelete( pNtk2 );
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: putontop [-h] <file>\n" );
    Abc_Print( -2, "\t         connects PIs of network in <file> to POs of current network\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file name with the second network\n");
    Abc_Print( -2, "\t       : (given several files, all networks are stacked on top of each other)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFrames( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkTemp, * pNtkRes;
    int nFrames;
    int fInitial;
    int fVerbose;
    int c;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    nFrames  = 5;
    fInitial = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames <= 0 )
                goto usage;
            break;
        case 'i':
            fInitial ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        pNtkTemp = Abc_NtkStrash( pNtk, 0, 0, 0 );
        pNtkRes  = Abc_NtkFrames( pNtkTemp, nFrames, fInitial, fVerbose );
        Abc_NtkDelete( pNtkTemp );
    }
    else
        pNtkRes  = Abc_NtkFrames( pNtk, nFrames, fInitial, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Unrolling the network has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: frames [-F <num>] [-ivh]\n" );
    Abc_Print( -2, "\t           unrolls the network for a number of time frames\n" );
    Abc_Print( -2, "\t-F <num> : the number of frames to unroll [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-i       : toggles initializing the first frame [default = %s]\n", fInitial? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles outputting verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDFrames( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkTemp, * pNtkRes;
    int nPrefix;
    int nFrames;
    int fInitial;
    int fVerbose;
    int c;

    extern Abc_Ntk_t * Abc_NtkDarFrames( Abc_Ntk_t * pNtk, int nPrefix, int nFrames, int fInitial, int fVerbose );
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    nPrefix  = 5;
    nFrames  = 5;
    fInitial = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NFivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nPrefix = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPrefix <= 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames <= 0 )
                goto usage;
            break;
        case 'i':
            fInitial ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( nPrefix > nFrames )
    {
        Abc_Print( -1, "Prefix (%d) cannot be more than the number of frames (%d).\n", nPrefix, nFrames );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        pNtkTemp = Abc_NtkStrash( pNtk, 0, 0, 0 );
        pNtkRes  = Abc_NtkDarFrames( pNtkTemp, nPrefix, nFrames, fInitial, fVerbose );
        Abc_NtkDelete( pNtkTemp );
    }
    else
        pNtkRes  = Abc_NtkDarFrames( pNtk, nPrefix, nFrames, fInitial, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Unrolling the network has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: dframes [-NF <num>] [-ivh]\n" );
    Abc_Print( -2, "\t         unrolls the network with simplification\n" );
    Abc_Print( -2, "\t-N num : the number of frames to use as prefix [default = %d]\n", nPrefix );
    Abc_Print( -2, "\t-F num : the number of frames to unroll [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-i     : toggles initializing the first frame [default = %s]\n", fInitial? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles outputting verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}



/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSop( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c, fCubeSort = 1, fMode = -1, nCubeLimit = 1000000;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Csdnh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCubeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCubeLimit < 0 )
                goto usage;
            break;
        case 's':
            fCubeSort ^= 1;
            break;
        case 'd':
            fMode = 1;
            break;
        case 'n':
            fMode = 0;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Converting to SOP is possible only for logic networks.\n" );
        return 1;
    }
    if ( !fCubeSort && Abc_NtkHasBdd(pNtk) && !Abc_NtkBddToSop(pNtk, -1, ABC_INFINITY, 0) )
    {
        Abc_Print( -1, "Converting to SOP has failed.\n" );
        return 0;
    }
    if ( !Abc_NtkToSop(pNtk, fMode, nCubeLimit) )
    {
        Abc_Print( -1, "Converting to SOP has failed.\n" );
        return 0;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: sop [-C num] [-sdnh]\n" );
    Abc_Print( -2, "\t         converts node functions to SOP\n" );
    Abc_Print( -2, "\t-C num : the limit on the number of cubes at a node [default = %d]\n", nCubeLimit );
    Abc_Print( -2, "\t-s     : toggles cube sort when converting from BDDs [default = %s]\n", fCubeSort ? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggles using only positive polarity [default = %s]\n", fMode == 1 ? "yes": "no"  );
    Abc_Print( -2, "\t-n     : toggles using only negative polarity [default = %s]\n", fMode == 0 ? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBdd( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int fReorder = 1, fBdd2Sop = 0;
    int c;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "rsh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'r':
            fReorder ^= 1;
            break;
        case 's':
            fBdd2Sop ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Converting to BDD is possible only for logic networks.\n" );
        return 1;
    }
    if ( fBdd2Sop && Abc_NtkHasSop(pNtk) )
        return !Abc_NtkSopToBdd(pNtk);
    if ( Abc_NtkIsBddLogic(pNtk) )
    {
        Abc_Print( -1, "The logic network is already in the BDD form.\n" );
        return 0;
    }
    if ( !Abc_NtkToBdd(pNtk) )
    {
        Abc_Print( -1, "Converting to BDD has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: bdd [-rsh]\n" );
    Abc_Print( -2, "\t         converts node functions to BDD\n" );
    Abc_Print( -2, "\t-r     : toggles enabling dynamic variable reordering [default = %s]\n", fReorder? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggles constructing BDDs directly from SOPs [default = %s]\n", fBdd2Sop? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Converting to AIG is possible only for logic networks.\n" );
        return 1;
    }
    if ( Abc_NtkIsAigLogic(pNtk) )
    {
        Abc_Print( -1, "The logic network is already in the AIG form.\n" );
        return 0;
    }
    if ( !Abc_NtkToAig(pNtk) )
    {
        Abc_Print( -1, "Converting to AIG has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: aig [-h]\n" );
    Abc_Print( -2, "\t         converts node functions to AIG\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandReorder( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fVerbose;
    extern void Abc_NtkBddReorder( Abc_Ntk_t * pNtk, int fVerbose );

    // set defaults
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkIsBddLogic(pNtk) )
    {
        Abc_Print( -1, "Variable reordering is possible when node functions are BDDs (run \"bdd\").\n" );
        return 1;
    }
    Abc_NtkBddReorder( pNtk, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: reorder [-vh]\n" );
    Abc_Print( -2, "\t         reorders local functions of the nodes using sifting\n" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBidec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fVerbose;
    extern void Abc_NtkBidecResyn( Abc_Ntk_t * pNtk, int fVerbose );

    // set defaults
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkIsAigLogic(pNtk) )
    {
        Abc_Print( -1, "Bi-decomposition only works when node functions are AIGs (run \"aig\").\n" );
        return 1;
    }
    Abc_NtkBidecResyn( pNtk, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: bidec [-vh]\n" );
    Abc_Print( -2, "\t         applies bi-decomposition to local functions of the nodes\n" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandOrder( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pFile;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    char * pFileName;
    int c;
    int fReverse;
    int fVerbose;
    extern void Abc_NtkImplementCiOrder( Abc_Ntk_t * pNtk, char * pFileName, int fReverse, int fVerbose );
    extern void Abc_NtkFindCiOrder( Abc_Ntk_t * pNtk, int fReverse, int fVerbose );

    // set defaults
    fReverse = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "rvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'r':
            fReverse ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
//    if ( Abc_NtkLatchNum(pNtk) > 0 )
//    {
//        Abc_Print( -1, "Currently this procedure does not work for sequential networks.\n" );
//        return 1;
//    }

    // if the var order file is given, implement this order
    pFileName = NULL;
    if ( argc == globalUtilOptind + 1 )
    {
        pFileName = argv[globalUtilOptind];
        pFile = fopen( pFileName, "r" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Cannot open file \"%s\" with the BDD variable order.\n", pFileName );
            return 1;
        }
        fclose( pFile );
    }
    if ( pFileName )
        Abc_NtkImplementCiOrder( pNtk, pFileName, fReverse, fVerbose );
    else
        Abc_NtkFindCiOrder( pNtk, fReverse, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: order [-rvh] <file>\n" );
    Abc_Print( -2, "\t         computes a good static CI variable order\n" );
    Abc_Print( -2, "\t-r     : toggle reverse ordering [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : (optional) file with the given variable order\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMuxes( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fGlobal = 0, fUseAdd = 0, Limit = 1000000;
    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Bgah" ) ) != EOF )
    {
        switch ( c )
        {
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            Limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Limit < 0 )
                goto usage;
            break;
        case 'g':
            fGlobal ^= 1;
            break;
        case 'a':
            fUseAdd ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fGlobal )
    {
        if ( !Abc_NtkIsStrash(pNtk) )
        {
            Abc_Print( -1, "The current network should be an AIG.\n" );
            return 1;
        }
    }
    else
    {
        if ( !Abc_NtkIsBddLogic(pNtk) )
        {
            Abc_Print( -1, "Only a BDD logic network can be converted to MUXes.\n" );
            return 1;
        }
    }

    // get the new network
    pNtkRes = Abc_NtkBddToMuxes( pNtk, fGlobal, Limit, fUseAdd );
    if ( pNtkRes == NULL )
    {
        Abc_Print( 0, "Converting to MUXes has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: muxes [-B num] [-gah]\n" );
    Abc_Print( -2, "\t          converts the current network into a network derived by\n" );
    Abc_Print( -2, "\t          replacing all nodes by DAGs isomorphic to the local BDDs\n" );
    Abc_Print( -2, "\t-B <num>: limit on live BDD nodes during collapsing [default = %d]\n", Limit );
    Abc_Print( -2, "\t-g      : toggle visualizing the global BDDs of primary outputs [default = %s].\n", fGlobal? "yes": "no" );
    Abc_Print( -2, "\t-a      : toggle using ADDs instead of BDDs [default = %s].\n", fUseAdd? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCubes( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkSopToCubes( Abc_Ntk_t * pNtk, int fXor );
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fXor = 0;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "xh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'x':
            fXor ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Only a SOP logic network can be transformed into cubes.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkSopToCubes( pNtk, fXor );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Converting to cubes has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: cubes [-xh]\n" );
    Abc_Print( -2, "\t        converts the current network into a network derived by creating\n" );
    Abc_Print( -2, "\t        a separate node for each product and sum in the local SOPs\n" );
    Abc_Print( -2, "\t-x    : toggle using XOR instead of OR [default = %s]\n", fXor? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExpand( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkExpandCubes( Abc_Ntk_t * pNtk, Gia_Man_t * pGia, int fVerbose );
    Abc_Ntk_t * pStrash, * pNtk2, * pNtk = Abc_FrameReadNtk(pAbc);
    Gia_Man_t * pGia; int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Only a SOP logic network can be transformed into cubes.\n" );
        return 1;
    }
    if ( Abc_NtkLevel(pNtk) > 1 )
    {
        Abc_Print( -1, "The number of logic levels is more than 1 (collapse the network and try again).\n" );
        return 1;
    }
    // read the offset representation
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( 0, "Using the complement of the current network as its offset.\n" );
        pNtk2 = Abc_NtkDup( pNtk );
    }
    else
    {
        char * FileName = argv[globalUtilOptind];
        pNtk2 = Io_Read( FileName, Io_ReadFileType(FileName), 1, 0 );
        if ( pNtk2 == NULL )
        {
            Abc_Print( -1, "Failed to read the current network from file \"%s\".\n", FileName );
            return 1;
        }
    }
    // strash the network
    pStrash = Abc_NtkStrash( pNtk2, 0, 1, 0 );
    Abc_NtkDelete( pNtk2 );
    // convert it into an AIG
    pGia = Abc_NtkClpGia( pStrash );
    //Gia_AigerWrite( pGia, "aig_dump.aig", 0, 0, 0 );
    Abc_NtkDelete( pStrash );
    // get the new network
    Abc_NtkExpandCubes( pNtk, pGia, fVerbose );
    Gia_ManStop( pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: expand [-vh] <file>\n" );
    Abc_Print( -2, "\t        expands cubes against the offset\n" );
    Abc_Print( -2, "\t-v    : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    Abc_Print( -2, "\tfile  : (optional) representation of on-set plus dc-set\n");

    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSplitSop( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkSplitSop( Abc_Ntk_t * pNtk, int nCubesMax, int fVerbose );
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fVerbose = 0, nCubesMax = 100;
    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nCubesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCubesMax < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Only a SOP logic network can be transformed into cubes.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkSplitSop( pNtk, nCubesMax, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Converting to cubes has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: splitsop [-N num] [-vh]\n" );
    Abc_Print( -2, "\t         splits nodes whose SOP size is larger than the given one\n" );
    Abc_Print( -2, "\t-N num : the maximum number of cubes after splitting [default = %d]\n", nCubesMax );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExtSeqDcs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fVerbose;
    extern int Abc_NtkExtractSequentialDcs( Abc_Ntk_t * pNet, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "The current network has no latches.\n" );
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Extracting sequential don't-cares works only for AIGs (run \"strash\").\n" );
        return 0;
    }
    if ( !Abc_NtkExtractSequentialDcs( pNtk, fVerbose ) )
    {
        Abc_Print( -1, "Extracting sequential don't-cares has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: ext_seq_dcs [-vh]\n" );
    Abc_Print( -2, "\t         create EXDC network using unreachable states\n" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandReach( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Saig_ParBbr_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    char * pLogFileName = NULL;

    extern int Abc_NtkDarReach( Abc_Ntk_t * pNtk, Saig_ParBbr_t * pPars );

    // set defaults
    Bbr_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "TBFLproyvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBddMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBddMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'p':
            pPars->fPartition ^= 1;
            break;
        case 'r':
            pPars->fReorder ^= 1;
            break;
        case 'o':
            pPars->fReorderImage ^= 1;
            break;
        case 'y':
            pPars->fSkipOutCheck ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "The current network has no latches.\n" );
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Reachability analysis works only for AIGs (run \"strash\").\n" );
        return 1;
    }
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }
    pAbc->Status  = Abc_NtkDarReach( pNtk, pPars );
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "reach" );
    return 0;

usage:
    Abc_Print( -2, "usage: reach [-TBF num] [-L file] [-proyvh]\n" );
    Abc_Print( -2, "\t         verifies sequential miter using BDD-based reachability\n" );
    Abc_Print( -2, "\t-T num : approximate time limit in seconds (0=infinite) [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-B num : max number of nodes in the intermediate BDDs [default = %d]\n", pPars->nBddMax );
    Abc_Print( -2, "\t-F num : max number of reachability iterations [default = %d]\n", pPars->nIterMax );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-p     : enable partitioned image computation [default = %s]\n", pPars->fPartition? "yes": "no" );
    Abc_Print( -2, "\t-r     : enable dynamic BDD variable reordering [default = %s]\n", pPars->fReorder? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggles BDD variable reordering during image computation [default = %s]\n", pPars->fReorderImage? "yes": "no" );
    Abc_Print( -2, "\t-y     : skip checking property outputs [default = %s]\n", pPars->fSkipOutCheck? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCone( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Abc_Obj_t * pNode, * pNodeCo;
    int c;
    int fUseAllCis;
    int fUseMffc;
    int fSeq;
    int Output;
    int nRange;

    extern Abc_Ntk_t * Abc_NtkMakeOnePo( Abc_Ntk_t * pNtk, int Output, int nRange );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fUseAllCis = 0;
    fUseMffc = 0;
    fSeq = 0;
    Output = -1;
    nRange = -1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ORmash" ) ) != EOF )
    {
        switch ( c )
        {
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            Output = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Output < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRange = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRange < 0 )
                goto usage;
            break;
        case 'm':
            fUseMffc ^= 1;
            break;
        case 'a':
            fUseAllCis ^= 1;
            break;
        case 's':
            fSeq ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently can only be applied to the logic network or an AIG.\n" );
        return 1;
    }

    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }

    pNodeCo = NULL;
    if ( argc == globalUtilOptind + 1 )
    {
        pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
        if ( pNode == NULL )
        {
            Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
            return 1;
        }
        if ( fUseMffc )
            pNtkRes = Abc_NtkCreateMffc( pNtk, pNode, argv[globalUtilOptind] );
        else
            pNtkRes = Abc_NtkCreateCone( pNtk, pNode, argv[globalUtilOptind], fUseAllCis );
    }
    else
    {
        if ( Output == -1 )
        {
            Abc_Print( -1, "The node is not specified.\n" );
            return 1;
        }
        if ( Output >= Abc_NtkCoNum(pNtk) )
        {
            Abc_Print( -1, "The 0-based output number (%d) is larger than the number of outputs (%d).\n", Output, Abc_NtkCoNum(pNtk) );
            return 1;
        }
        pNodeCo = Abc_NtkCo( pNtk, Output );
        if ( fSeq )
            pNtkRes = Abc_NtkMakeOnePo( pNtk, Output, nRange );
        else if ( fUseMffc )
            pNtkRes = Abc_NtkCreateMffc( pNtk, Abc_ObjFanin0(pNodeCo), Abc_ObjName(pNodeCo) );
        else
            pNtkRes = Abc_NtkCreateCone( pNtk, Abc_ObjFanin0(pNodeCo), Abc_ObjName(pNodeCo), fUseAllCis );
    }
    if ( pNodeCo && Abc_ObjFaninC0(pNodeCo) && !fSeq )
    {
        Abc_NtkPo(pNtkRes, 0)->fCompl0  ^= 1;
//        Abc_Print( -1, "The extracted cone represents the complement function of the CO.\n" );
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Writing the logic cone of one node has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: cone [-OR num] [-amsh] <name>\n" );
    Abc_Print( -2, "\t         replaces the current network by one logic cone\n" );
    Abc_Print( -2, "\t-a     : toggle keeping all CIs or structral support only [default = %s]\n", fUseAllCis? "all": "structural" );
    Abc_Print( -2, "\t-m     : toggle keeping only MFFC or complete TFI cone [default = %s]\n", fUseMffc? "MFFC": "TFI cone" );
    Abc_Print( -2, "\t-s     : toggle comb or sequential cone (works with \"-O num\") [default = %s]\n", fSeq? "seq": "comb" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t-O num : (optional) the 0-based number of the CO to extract\n");
    Abc_Print( -2, "\t-R num : (optional) the number of outputs to extract\n");
    Abc_Print( -2, "\tname   : (optional) the name of the node to extract\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandNode( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Abc_Obj_t * pNode;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
       case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Currently can only be applied to a logic network.\n" );
        return 1;
    }

    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }

    pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
    if ( pNode == NULL )
    {
        Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
        return 1;
    }

    pNtkRes = Abc_NtkCreateFromNode( pNtk, pNode );
//    pNtkRes = Abc_NtkDeriveFromBdd( pNtk->pManFunc, pNode->pData, NULL, NULL );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Splitting one node has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: node [-h] <name>\n" );
    Abc_Print( -2, "\t         replaces the current network by the network composed of one node\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tname   : the node name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRange( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    pNtk = Abc_FrameReadNtk(pAbc);
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
       case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently can only be applied to an AIG.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkCreateFromRange( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Deriving the network has failed.\n" );
        return 1;
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: range [-h]\n" );
    Abc_Print( -2, "\t         computes the range of output values as one node\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCof( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk;
    Abc_Obj_t * pNode;
    int c, Const;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
       case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Currently can only be applied to a logic network.\n" );
        return 1;
    }

    if ( argc != globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }
    pNode = Abc_NtkFindCi( pNtk, argv[globalUtilOptind] );
    if ( pNode == NULL )
        pNode = Abc_NtkFindNode( pNtk, argv[globalUtilOptind] );
    if ( pNode == NULL )
    {
        Abc_Print( -1, "Cannot find node \"%s\".\n", argv[globalUtilOptind] );
        return 1;
    }
    Const = atoi( argv[globalUtilOptind+1] );
    if ( Const != 0 && Const != 1 )
    {
        Abc_Print( -1, "Constant should be 0 or 1.\n", argv[globalUtilOptind+1] );
        return 1;
    }
    Abc_ObjReplaceByConstant( pNode, Const );
    return 0;

usage:
    Abc_Print( -2, "usage: cof [-h] <node> <const>\n" );
    Abc_Print( -2, "\t          replaces one node in a logic network by constant 0 or 1\n" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    Abc_Print( -2, "\t<node>  : the node to replace\n");
    Abc_Print( -2, "\t<const> : the constant to replace the node with\n");
    Abc_Print( -2, "\tname    : the node name\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTopmost( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nLevels;
    extern Abc_Ntk_t * Abc_NtkTopmost( Abc_Ntk_t * pNtk, int nLevels );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nLevels = 10;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevels = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevels < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }

    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Currently only works for combinational circuits.\n" );
        return 0;
    }

    pNtkRes = Abc_NtkTopmost( pNtk, nLevels );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "The command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: topmost [-N num] [-h]\n" );
    Abc_Print( -2, "\t         replaces the current network by several of its topmost levels\n" );
    Abc_Print( -2, "\t-N num : max number of levels [default = %d]\n", nLevels );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tname   : the node name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBottommost( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nLevels;
    extern Abc_Ntk_t * Abc_NtkBottommost( Abc_Ntk_t * pNtk, int nLevels );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nLevels = 10;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevels = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevels < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }

    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Currently only works for combinational circuits.\n" );
        return 0;
    }

    pNtkRes = Abc_NtkBottommost( pNtk, nLevels );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "The command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: bottommost [-N num] [-h]\n" );
    Abc_Print( -2, "\t         replaces the current network by several of its bottommost levels\n" );
    Abc_Print( -2, "\t-N num : max number of levels [default = %d]\n", nLevels );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tname   : the node name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTopAnd( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    extern Abc_Ntk_t * Abc_NtkTopAnd( Abc_Ntk_t * pNtk );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }

    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Currently can only works for combinational circuits.\n" );
        return 0;
    }
    if ( Abc_NtkPoNum(pNtk) != 1 )
    {
        Abc_Print( -1, "Currently expects a single-output miter.\n" );
        return 0;
    }
    if ( Abc_ObjFaninC0(Abc_NtkPo(pNtk, 0)) )
    {
        Abc_Print( -1, "The PO driver is complemented. AND-decomposition is impossible.\n" );
        return 0;
    }
    if ( !Abc_ObjIsNode(Abc_ObjChild0(Abc_NtkPo(pNtk, 0))) )
    {
        Abc_Print( -1, "The PO driver is not a node. AND-decomposition is impossible.\n" );
        return 0;
    }
    pNtkRes = Abc_NtkTopAnd( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "The command has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: topand [-h]\n" );
    Abc_Print( -2, "\t         performs AND-decomposition of single-output combinational miter\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tname   : the node name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTrim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Gia_Man_t * pGia, * pNew;
    Aig_Man_t * pAig;
    int c;
    pNtk = Abc_FrameReadNtk(pAbc);
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Trimming works only for AIGs (run \"strash\").\n" );
        return 1;
    }
    // convert to GIA
    pAig = Abc_NtkToDar( pNtk, 0, 1 );
    pGia = Gia_ManFromAigSimple( pAig );
    Aig_ManStop( pAig );
    // perform trimming
    pNew = Gia_ManDupTrimmed( pGia, 1, 1, 0, -1 );
    Gia_ManStop( pGia );
    // convert back
    pAig = Gia_ManToAigSimple( pNew );
    Gia_ManStop( pNew );
    pNtkRes = Abc_NtkFromAigPhase( pAig );
    Aig_ManStop( pAig );
    // duplicate the name and the spec
    ABC_FREE( pNtkRes->pName );
    ABC_FREE( pNtkRes->pSpec );
    pNtkRes->pName = Extra_UtilStrsav(pNtk->pName);
    pNtkRes->pSpec = Extra_UtilStrsav(pNtk->pSpec);
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: trim [-h]\n" );
    Abc_Print( -2, "\t         removes POs fed by constants and PIs w/o fanout\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandShortNames( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c, fKeepIo = 0;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "kh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'k':
            fKeepIo ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( fKeepIo )
        Abc_NtkCleanNames( pNtk );
    else
        Abc_NtkShortNames( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: short_names [-kh]\n" );
    Abc_Print( -2, "\t         replaces PI/PO/latch names by short char strings\n" );
    Abc_Print( -2, "\t-k     : toggle keeping PI/PO names unchanged [default = %s]\n", fKeepIo? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMoveNames( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkMoveNames( Abc_Ntk_t * pNtk, Abc_Ntk_t * pOld );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Ntk_t * pNtk2;
    char * FileName;
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    // get the second network
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "The network to take names from is not given.\n" );
        return 1;
    }

    // read the second network
    FileName = argv[globalUtilOptind];
    pNtk2 = Io_Read( FileName, Io_ReadFileType(FileName), 1, 0 );
    if ( pNtk2 == NULL )
        return 1;

    // compare inputs/outputs
    if ( Abc_NtkPiNum(pNtk) != Abc_NtkPiNum(pNtk2) )
    {
        Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "The PI count (%d) of the first network is not equal to PI count (%d) of the second network.\n", Abc_NtkPiNum(pNtk), Abc_NtkPiNum(pNtk2) );
        return 0;
    }
    // compare inputs/outputs
    if ( Abc_NtkPoNum(pNtk) != Abc_NtkPoNum(pNtk2) )
    {
        Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "The PO count (%d) of the first network is not equal to PO count (%d) of the second network.\n", Abc_NtkPoNum(pNtk), Abc_NtkPoNum(pNtk2) );
        return 0;
    }
    // compare inputs/outputs
    if ( Abc_NtkLatchNum(pNtk) != Abc_NtkLatchNum(pNtk2) )
    {
        Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "The flop count (%d) of the first network is not equal to flop count (%d) of the second network.\n", Abc_NtkLatchNum(pNtk), Abc_NtkLatchNum(pNtk2) );
        return 0;
    }
    Abc_NtkMoveNames( pNtk, pNtk2 );
    Abc_NtkDelete( pNtk2 );
    return 0;

usage:
    Abc_Print( -2, "usage: move_names [-h] <file>\n" );
    Abc_Print( -2, "\t         moves PI/PO/latch names from the other network\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file with network that has required names\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExdcFree( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( pNtk->pExdc == NULL )
    {
        Abc_Print( -1, "The network has no EXDC.\n" );
        return 1;
    }

    Abc_NtkDelete( pNtk->pExdc );
    pNtk->pExdc = NULL;

    // replace the current network
    pNtkRes = Abc_NtkDup( pNtk );
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: exdc_free [-h]\n" );
    Abc_Print( -2, "\t         frees the EXDC network of the current network\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExdcGet( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( pNtk->pExdc == NULL )
    {
        Abc_Print( -1, "The network has no EXDC.\n" );
        return 1;
    }

    // replace the current network
    pNtkRes = Abc_NtkDup( pNtk->pExdc );
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: exdc_get [-h]\n" );
    Abc_Print( -2, "\t         replaces the current network by the EXDC of the current network\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExdcSet( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pFile;
    Abc_Ntk_t * pNtk, * pNtkNew, * pNtkRes;
    char * FileName;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( argc != globalUtilOptind + 1 )
    {
        goto usage;
    }

    // get the input file name
    FileName = argv[globalUtilOptind];
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".mv", ".blif", ".pla", ".eqn", ".bench" )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );

    // set the new network
    pNtkNew = Io_Read( FileName, Io_ReadFileType(FileName), 1, 0 );
    if ( pNtkNew == NULL )
    {
        Abc_Print( -1, "Reading network from file has failed.\n" );
        return 1;
    }

    // replace the EXDC
    if ( pNtk->pExdc )
    {
        Abc_NtkDelete( pNtk->pExdc );
        pNtk->pExdc = NULL;
    }
    pNtkRes = Abc_NtkDup( pNtk );
    pNtkRes->pExdc = pNtkNew;

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: exdc_set [-h] <file>\n" );
    Abc_Print( -2, "\t         sets the network from file as EXDC for the current network\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file with the new EXDC network\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCareSet( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pFile;
    Abc_Ntk_t * pNtk, * pNtkNew, * pNtkRes;
    char * FileName;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( argc != globalUtilOptind + 1 )
    {
        goto usage;
    }

    // get the input file name
    FileName = argv[globalUtilOptind];
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".mv", ".blif", ".pla", ".eqn", ".bench" )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );

    // set the new network
    pNtkNew = Io_Read( FileName, Io_ReadFileType(FileName), 1, 0 );
    if ( pNtkNew == NULL )
    {
        Abc_Print( -1, "Reading network from file has failed.\n" );
        return 1;
    }

    // replace the EXDC
    if ( pNtk->pExcare )
    {
        Abc_NtkDelete( (Abc_Ntk_t *)pNtk->pExcare );
        pNtk->pExcare = NULL;
    }
    pNtkRes = Abc_NtkDup( pNtk );
    pNtkRes->pExcare = pNtkNew;

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: care_set [-h] <file>\n" );
    Abc_Print( -2, "\t         sets the network from file as a care for the current network\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file with the new care network\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cut_Params_t Params, * pParams = &Params;
    Cut_Man_t * pCutMan;
    Cut_Oracle_t * pCutOracle = NULL;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fOracle;
    extern Cut_Man_t * Abc_NtkCuts( Abc_Ntk_t * pNtk, Cut_Params_t * pParams );
    extern void Abc_NtkCutsOracle( Abc_Ntk_t * pNtk, Cut_Oracle_t * pCutOracle );

    // set defaults
    fOracle = 0;
    memset( pParams, 0, sizeof(Cut_Params_t) );
    pParams->nVarsMax    = 5;     // the max cut size ("k" of the k-feasible cuts)
    pParams->nKeepMax    = 1000;  // the max number of cuts kept at a node
    pParams->fTruth      = 1;     // compute truth tables
    pParams->fFilter     = 1;     // filter dominated cuts
    pParams->fDrop       = 0;     // drop cuts on the fly
    pParams->fDag        = 1;     // compute DAG cuts
    pParams->fTree       = 0;     // compute tree cuts
    pParams->fGlobal     = 0;     // compute global cuts
    pParams->fLocal      = 0;     // compute local cuts
    pParams->fFancy      = 0;     // compute something fancy
    pParams->fRecordAig  = 1;     // compute something fancy
    pParams->fMap        = 0;     // compute mapping delay
    pParams->fAdjust     = 0;     // removes useless fanouts
    pParams->fNpnSave    = 0;     // enables dumping truth tables
    pParams->fVerbose    = 0;     // the verbosiness flag
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KMtfdxyglzamjvosh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nVarsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nVarsMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nKeepMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nKeepMax < 0 )
                goto usage;
            break;
        case 't':
            pParams->fTruth ^= 1;
            break;
        case 'f':
            pParams->fFilter ^= 1;
            break;
        case 'd':
            pParams->fDrop ^= 1;
            break;
        case 'x':
            pParams->fDag ^= 1;
            break;
        case 'y':
            pParams->fTree ^= 1;
            break;
        case 'g':
            pParams->fGlobal ^= 1;
            break;
        case 'l':
            pParams->fLocal ^= 1;
            break;
        case 'z':
            pParams->fFancy ^= 1;
            break;
        case 'a':
            pParams->fRecordAig ^= 1;
            break;
        case 'm':
            pParams->fMap ^= 1;
            break;
        case 'j':
            pParams->fAdjust ^= 1;
            break;
        case 'v':
            pParams->fVerbose ^= 1;
            break;
        case 'o':
            fOracle ^= 1;
            break;
        case 's':
            pParams->fNpnSave ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Cut computation is available only for AIGs (run \"strash\").\n" );
        return 1;
    }
    if ( pParams->nVarsMax < CUT_SIZE_MIN || pParams->nVarsMax > CUT_SIZE_MAX )
    {
        Abc_Print( -1, "Can only compute the cuts for %d <= K <= %d.\n", CUT_SIZE_MIN, CUT_SIZE_MAX );
        return 1;
    }
    if ( pParams->fDag && pParams->fTree )
    {
        Abc_Print( -1, "Cannot compute both DAG cuts and tree cuts at the same time.\n" );
        return 1;
    }

    if ( pParams->fNpnSave )
    {
        pParams->nVarsMax = 6;
        pParams->fTruth = 1;
    }

    if ( fOracle )
        pParams->fRecord = 1;
    pCutMan = Abc_NtkCuts( pNtk, pParams );
    if ( fOracle )
        pCutOracle = Cut_OracleStart( pCutMan );
    Cut_ManStop( pCutMan );
    if ( fOracle )
    {
        assert(pCutOracle);
        Abc_NtkCutsOracle( pNtk, pCutOracle );
        Cut_OracleStop( pCutOracle );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: cut [-K num] [-M num] [-tfdcovamjsvh]\n" );
    Abc_Print( -2, "\t         computes k-feasible cuts for the AIG\n" );
    Abc_Print( -2, "\t-K num : max number of leaves (%d <= num <= %d) [default = %d]\n",     CUT_SIZE_MIN, CUT_SIZE_MAX, pParams->nVarsMax );
    Abc_Print( -2, "\t-M num : max number of cuts stored at a node [default = %d]\n",        pParams->nKeepMax );
    Abc_Print( -2, "\t-t     : toggle truth table computation [default = %s]\n",             pParams->fTruth?   "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle filtering of duplicated/dominated [default = %s]\n",   pParams->fFilter?  "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle dropping when fanouts are done [default = %s]\n",      pParams->fDrop?    "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle computing only DAG cuts [default = %s]\n",             pParams->fDag?     "yes": "no" );
    Abc_Print( -2, "\t-y     : toggle computing only tree cuts [default = %s]\n",            pParams->fTree?    "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle computing only global cuts [default = %s]\n",          pParams->fGlobal?  "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle computing only local cuts [default = %s]\n",           pParams->fLocal?   "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle fancy computations [default = %s]\n",                  pParams->fFancy?   "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle recording cut functions [default = %s]\n",             pParams->fRecordAig?"yes": "no" );
    Abc_Print( -2, "\t-m     : toggle delay-oriented FPGA mapping [default = %s]\n",         pParams->fMap?     "yes": "no" );
    Abc_Print( -2, "\t-j     : toggle removing fanouts due to XOR/MUX [default = %s]\n",     pParams->fAdjust?  "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle creating library of 6-var functions [default = %s]\n", pParams->fNpnSave?  "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",        pParams->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandScut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cut_Params_t Params, * pParams = &Params;
    Cut_Man_t * pCutMan;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    extern Cut_Man_t * Abc_NtkSeqCuts( Abc_Ntk_t * pNtk, Cut_Params_t * pParams );

    // set defaults
    memset( pParams, 0, sizeof(Cut_Params_t) );
    pParams->nVarsMax  = 5;     // the max cut size ("k" of the k-feasible cuts)
    pParams->nKeepMax  = 1000;  // the max number of cuts kept at a node
    pParams->fTruth    = 0;     // compute truth tables
    pParams->fFilter   = 1;     // filter dominated cuts
    pParams->fSeq      = 1;     // compute sequential cuts
    pParams->fVerbose  = 0;     // the verbosiness flag
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KMtvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nVarsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nVarsMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nKeepMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nKeepMax < 0 )
                goto usage;
            break;
        case 't':
            pParams->fTruth ^= 1;
            break;
        case 'v':
            pParams->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
/*
    if ( !Abc_NtkIsSeq(pNtk) )
    {
        Abc_Print( -1, "Sequential cuts can be computed for sequential AIGs (run \"seq\").\n" );
        return 1;
    }
*/
    if ( pParams->nVarsMax < CUT_SIZE_MIN || pParams->nVarsMax > CUT_SIZE_MAX )
    {
        Abc_Print( -1, "Can only compute the cuts for %d <= K <= %d.\n", CUT_SIZE_MIN, CUT_SIZE_MAX );
        return 1;
    }

    pCutMan = Abc_NtkSeqCuts( pNtk, pParams );
    Cut_ManStop( pCutMan );
    return 0;

usage:
    Abc_Print( -2, "usage: scut [-K num] [-M num] [-tvh]\n" );
    Abc_Print( -2, "\t         computes k-feasible cuts for the sequential AIG\n" );
    Abc_Print( -2, "\t-K num : max number of leaves (%d <= num <= %d) [default = %d]\n",   CUT_SIZE_MIN, CUT_SIZE_MAX, pParams->nVarsMax );
    Abc_Print( -2, "\t-M num : max number of cuts stored at a node [default = %d]\n",      pParams->nKeepMax );
    Abc_Print( -2, "\t-t     : toggle truth table computation [default = %s]\n",           pParams->fTruth?   "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",      pParams->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandEspresso( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fVerbose;
    extern void Abc_NtkEspresso( Abc_Ntk_t * pNtk, int fVerbose );

    if ( argc == 2 && !strcmp(argv[1], "-h") )
    {
        Abc_Print( -2, "The espresso command is currently disabled.\n" );
        return 1;
    }

    Abc_Print( -1, "This command is currently disabled.\n" );
    return 0;

    // set defaults
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "SOP minimization is possible for logic networks (run \"renode\").\n" );
        return 1;
    }
//    Abc_NtkEspresso( pNtk, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: espresso [-vh]\n" );
    Abc_Print( -2, "\t         minimizes SOPs of the local functions using Espresso\n" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandGen( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nVars;    // the number of variables
    int nArgs;    // the number of arguments
    int nLutSize = -1; // the size of LUTs
    int nLuts = -1;    // the number of LUTs
    int fAdder;
    int fAdderTree;
    int fSorter;
    int fMesh;
    int fMulti;
    int fBooth;
    int fFpga;
    int fOneHot;
    int fRandom;
    int fVerbose;
    char * FileName;
    char Command[1000];
    extern void Abc_GenAdder( char * pFileName, int nVars );
    extern void Abc_GenSorter( char * pFileName, int nVars );
    extern void Abc_GenMesh( char * pFileName, int nVars );
    extern void Abc_GenMulti( char * pFileName, int nVars );
    extern void Abc_GenBooth( char * pFileName, int nVars );
    extern void Abc_GenFpga( char * pFileName, int nLutSize, int nLuts, int nVars );
    extern void Abc_GenOneHot( char * pFileName, int nVars );
    extern void Abc_GenRandom( char * pFileName, int nPis );
    extern void Abc_GenAdderTree( char * pFileName, int nArgs, int nBits );

    // set defaults
    nVars = 8;
    nArgs = 8;
    fAdder = 0;
    fAdderTree = 0;
    fSorter = 0;
    fMesh = 0;
    fMulti = 0;
    fBooth = 0;
    fFpga = 0;
    fOneHot = 0;
    fRandom = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NAKLatsembfnrvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            nArgs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nArgs < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLuts < 0 )
                goto usage;
            break;
        case 'a':
            fAdder ^= 1;
            break;
        case 't':
            fAdderTree ^= 1;
            break;
        case 's':
            fSorter ^= 1;
            break;
        case 'e':
            fMesh ^= 1;
            break;
        case 'm':
            fMulti ^= 1;
            break;
        case 'b':
            fBooth ^= 1;
            break;
        case 'f':
            fFpga ^= 1;
            break;
        case 'n':
            fOneHot ^= 1;
            break;
        case 'r':
            fRandom ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( argc != globalUtilOptind + 1 )
    {
        goto usage;
    }
    if ( nVars < 1 )
    {
        Abc_Print( -1, "The number of variables should be a positive integer.\n" );
        return 0;
    }
    // get the input file name
    FileName = argv[globalUtilOptind];
    if ( fAdder )
        Abc_GenAdder( FileName, nVars );
    else if ( fSorter )
        Abc_GenSorter( FileName, nVars );
    else if ( fMesh )
        Abc_GenMesh( FileName, nVars );
    else if ( fMulti )
        Abc_GenMulti( FileName, nVars );
    else if ( fBooth )
        Abc_GenBooth( FileName, nVars );
    else if ( fFpga )
        Abc_GenFpga( FileName, nLutSize, nLuts, nVars );
//        Abc_GenFpga( FileName, 2, 2, 3 );
//        Abc_GenFpga( FileName, 3, 2, 5 );
    else if ( fOneHot )
        Abc_GenOneHot( FileName, nVars );
    else if ( fRandom )
        Abc_GenRandom( FileName, nVars );
    else if ( fAdderTree )
    {
        printf( "Generating adder tree with %d arguments and %d bits.\n", nArgs, nVars );
        Abc_GenAdderTree( FileName, nArgs, nVars );
        sprintf( Command, "%%read %s; %%blast; &put", FileName );
        Cmd_CommandExecute( pAbc, Command );
        return 0;
    }
    else
    {
        Abc_Print( -1, "Type of circuit is not specified.\n" );
        return 0;
    }
    // read the file just produced
    sprintf(Command, "read %s", FileName );
    Cmd_CommandExecute( pAbc, Command );
    return 0;

usage:
    Abc_Print( -2, "usage: gen [-NAKL num] [-atsembfnrvh] <file>\n" );
    Abc_Print( -2, "\t         generates simple circuits\n" );
    Abc_Print( -2, "\t-N num : the number of variables [default = %d]\n", nVars );
    Abc_Print( -2, "\t-A num : the number of agruments (for adder tree) [default = %d]\n", nArgs );
    Abc_Print( -2, "\t-K num : the LUT size (to be used with switch -f) [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-L num : the LUT count (to be used with switch -f) [default = %d]\n", nLuts );
    Abc_Print( -2, "\t-a     : generate ripple-carry adder [default = %s]\n", fAdder? "yes": "no" );
    Abc_Print( -2, "\t-t     : generate an adder tree [default = %s]\n", fAdderTree? "yes": "no" );
    Abc_Print( -2, "\t-s     : generate a sorter [default = %s]\n", fSorter? "yes": "no" );
    Abc_Print( -2, "\t-e     : generate a mesh [default = %s]\n", fMesh? "yes": "no" );
    Abc_Print( -2, "\t-m     : generate a multiplier [default = %s]\n", fMulti? "yes": "no" );
    Abc_Print( -2, "\t-b     : generate a signed Booth multiplier [default = %s]\n", fBooth? "yes": "no" );
    Abc_Print( -2, "\t-f     : generate a LUT FPGA structure [default = %s]\n", fFpga? "yes": "no" );
    Abc_Print( -2, "\t-n     : generate one-hotness conditions [default = %s]\n", fOneHot? "yes": "no" );
    Abc_Print( -2, "\t-r     : generate random single-output function [default = %s]\n", fRandom? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : output file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandGenFsm( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_GenFsm( char * pFileName, int nIns, int nOuts, int nStates, int nLines, int ProbI, int ProbO );
    int c, nIns, nOuts, nStates, nLines, ProbI, ProbO, fVerbose;
    char * FileName;
    // set defaults
    nIns     =   30;
    nOuts    =    1;
    nStates  =   20;
    nLines   =  100;
    ProbI    =   10;
    ProbO    =  100;
    fVerbose =    0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IOSLPQvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIns = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIns < 0 )
                goto usage;
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            nOuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOuts < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nStates = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nStates < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLines = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLines < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            ProbI = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( ProbI < 0 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            ProbO = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( ProbO < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( argc != globalUtilOptind + 1 )
    {
        goto usage;
    }
    if ( nIns < 1 || nStates < 1 || nLines < 1 || ProbI < 1 || ProbO < 1 )
    {
        Abc_Print( -1, "The number of inputs. states, lines, and probablity should be positive integers.\n" );
        goto usage;
    }
    // get the input file name
    FileName = argv[globalUtilOptind];
    Abc_GenFsm( FileName, nIns, nOuts, nStates, nLines, ProbI, ProbO );
    return 0;

usage:
    Abc_Print( -2, "usage: genfsm [-IOSLPQ num] [-vh] <file>\n" );
    Abc_Print( -2, "\t         generates random FSM in KISS format\n" );
    Abc_Print( -2, "\t-I num : the number of input variables [default = %d]\n", nIns );
    Abc_Print( -2, "\t-O num : the number of output variables [default = %d]\n", nOuts );
    Abc_Print( -2, "\t-S num : the number of state variables [default = %d]\n", nStates );
    Abc_Print( -2, "\t-L num : the number of lines (product terms) [default = %d]\n", nLines );
    Abc_Print( -2, "\t-P num : percentage propability of a variable present in the input cube [default = %d]\n", ProbI );
    Abc_Print( -2, "\t-Q num : percentage propability of a variable present in the output cube [default = %d]\n", ProbO );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : output file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCover( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fVerbose;
    int fUseSop;
    int fUseEsop;
    int fUseInvs;
    int nFaninMax;
    int nCubesMax;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    fUseSop   =  1;
    fUseEsop  =  0;
    fVerbose  =  0;
    fUseInvs  =  1;
    nFaninMax =  8;
    nCubesMax =  8;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IPsxivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nFaninMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFaninMax < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nCubesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCubesMax < 0 )
                goto usage;
            break;
        case 's':
            fUseSop ^= 1;
            break;
        case 'x':
            fUseEsop ^= 1;
            break;
        case 'i':
            fUseInvs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for strashed networks.\n" );
        return 1;
    }

    // run the command
    pNtkRes = Abc_NtkSopEsopCover( pNtk, nFaninMax, nCubesMax, fUseEsop, fUseSop, fUseInvs, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: cover [-IP num] [-sxvh]\n" );
    Abc_Print( -2, "\t         decomposition into a network of SOP/ESOP PLAs\n" );
    Abc_Print( -2, "\t         (this command is known to have bugs)\n");
    Abc_Print( -2, "\t-I num : maximum number of inputs [default = %d]\n", nFaninMax );
    Abc_Print( -2, "\t-P num : maximum number of products [default = %d]\n", nCubesMax );
    Abc_Print( -2, "\t-s     : toggle the use of SOPs [default = %s]\n", fUseSop? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle the use of ESOPs [default = %s]\n", fUseEsop? "yes": "no" );
//    Abc_Print( -2, "\t-i     : toggle the use of interters [default = %s]\n", fUseInvs? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandInter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2, * pNtkRes = NULL;
    char ** pArgvNew;
    int nArgcNew;
    int c, fDelete1, fDelete2;
    int fRelation;
    int fVerbose;
    extern Abc_Ntk_t * Abc_NtkInter( Abc_Ntk_t * pNtkOn, Abc_Ntk_t * pNtkOff, int fRelation, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fRelation = 0;
    fVerbose  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "rvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'r':
            fRelation ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
        return 1;
    if ( nArgcNew == 0 )
    {
        Abc_Obj_t * pObj;
        int i;
        Abc_Print( -1, "Deriving new circuit structure for the current network.\n" );
        Abc_NtkForEachPo( pNtk2, pObj, i )
            Abc_ObjXorFaninC( pObj, 0 );
    }
    if ( fRelation && Abc_NtkCoNum(pNtk1) != 1 )
    {
        Abc_Print( -1, "Computation of interplants as a relation only works for single-output functions.\n" );
        Abc_Print( -1, "Use command \"cone\" to extract one output cone from the multi-output network.\n" );
    }
    else
        pNtkRes = Abc_NtkInter( pNtk1, pNtk2, fRelation, fVerbose );
    if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
    if ( fDelete2 ) Abc_NtkDelete( pNtk2 );

    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: inter [-rvh] <onset.blif> <offset.blif>\n" );
    Abc_Print( -2, "\t         derives interpolant of two networks representing onset and offset;\n" );
    Abc_Print( -2, "\t-r     : toggle computing interpolant as a relation [default = %s]\n", fRelation? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t         \n" );
    Abc_Print( -2, "\t         Comments:\n" );
    Abc_Print( -2, "\t         \n" );
    Abc_Print( -2, "\t         The networks given on the command line should have the same CIs/COs.\n" );
    Abc_Print( -2, "\t         If only one network is given on the command line, this network\n" );
    Abc_Print( -2, "\t         is assumed to be the offset, while the current network is the onset.\n" );
    Abc_Print( -2, "\t         If no network is given on the command line, the current network is\n" );
    Abc_Print( -2, "\t         assumed to be the onset and its complement is taken to be the offset.\n" );
    Abc_Print( -2, "\t         The resulting interpolant is stored as the current network.\n" );
    Abc_Print( -2, "\t         To verify that the interpolant agrees with the onset and the offset,\n" );
    Abc_Print( -2, "\t         save it in file \"inter.blif\" and run the following:\n" );
    Abc_Print( -2, "\t         (a) \"miter -i <onset.blif> <inter.blif>; iprove\"\n" );
    Abc_Print( -2, "\t         (b) \"miter -i <inter.blif> <offset_inv.blif>; iprove\"\n" );
    Abc_Print( -2, "\t         where <offset_inv.blif> is the network derived by complementing the\n" );
    Abc_Print( -2, "\t         outputs of <offset.blif>: \"r <offset.blif>; st -i; w <offset_inv.blif>\"\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDouble( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int nFrames;
    int fVerbose;
    extern Abc_Ntk_t * Abc_NtkDouble( Abc_Ntk_t * pNtk );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nFrames    = 50;
    fVerbose   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Only works for logic SOP networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkDouble( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: double [-vh]\n" );
    Abc_Print( -2, "\t         puts together two parallel copies of the current network\n" );
//    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBb2Wb( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkConvertBb2Wb( char * pFileNameIn, char * pFileNameOut, int fSeq, int fVerbose );
    int c;
    int fSeq;
    int fVerbose;
    // set defaults
    fSeq = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "svh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fSeq ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Expecting two files names on the command line.\n" );
        goto usage;
    }
    Abc_NtkConvertBb2Wb( argv[globalUtilOptind], argv[globalUtilOptind+1], fSeq, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: bb2wb [-svh] <file_in> <file_out>\n" );
    Abc_Print( -2, "\t             replaces black boxes by white boxes with AND functions\n" );
    Abc_Print( -2, "\t             (file names should have standard extensions, e.g. \"blif\")\n" );
    Abc_Print( -2, "\t-s         : toggle using sequential white boxes [default = %s]\n", fSeq? "yes": "no" );
    Abc_Print( -2, "\t-v         : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h         : print the command usage\n");
    Abc_Print( -2, "\t<file_in>  : input file with design containing black boxes\n");
    Abc_Print( -2, "\t<file_out> : output file with design containing white boxes\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandOutdec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkDarOutdec( Abc_Ntk_t * pNtk, int nLits, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Ntk_t * pNtkRes;
    int c, nLits = 1;
    int fVerbose = 0;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Lvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLits = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLits < 1 || nLits > 2 )
            {
                Abc_Print( 1,"Currently, command \"outdec\" works for 1-lit and 2-lit primes only.\n" );
                goto usage;
            }
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for strashed networks.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDarOutdec( pNtk, nLits, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: outdec [-Lvh]\n" );
    Abc_Print( -2, "\t         performs prime decomposition of the first output\n" );
    Abc_Print( -2, "\t-L num : the number of literals in the primes [default = %d]\n", nLits );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandNodeDup( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkNodeDup( Abc_Ntk_t * pNtk, int nLimit, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Ntk_t * pNtkRes;
    int c, nLimit = 30;
    int fVerbose = 0;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for logic networks.\n" );
        return 1;
    }
    if ( nLimit < 2 )
    {
        Abc_Print( -1, "The fanout limit should be more than 1.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkNodeDup( pNtk, nLimit, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: nodedup [-Nvh]\n" );
    Abc_Print( -2, "\t         duplicates internal nodes with high fanout\n" );
    Abc_Print( -2, "\t-N num : the number of fanouts to start duplication [default = %d]\n", nLimit );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestColor( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_ColorTest();
    Abc_ColorTest();
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTest( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_Gen2CodeTest();
    extern void Dau_NetworkEnumTest();
    //Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int nCutMax      =  1;
    int nLeafMax     =  4;
    int nDivMax      =  2;
    int nDecMax      =  3;
    int nNumOnes     =  0;
    int fNewAlgo     =  0;
    int fNewOrder    =  0;
    int fVerbose     =  0;
    int fVeryVerbose =  0;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CKDNMaovwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutMax < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLeafMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLeafMax < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nDivMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDivMax < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nDecMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDecMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nNumOnes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNumOnes < 0 )
                goto usage;
            break;
        case 'a':
            fNewAlgo ^= 1;
            break;
        case 'o':
            fNewOrder ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
/*
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
*/
/*
    if ( Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for logic networks.\n" );
        return 1;
    }
*/
/*
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "Only works for sequential networks.\n" );
        return 1;
    }
*/

/*
    if ( pNtk )
    {
        extern Abc_Ntk_t * Au_ManPerformTest( Abc_Ntk_t * p, int nCutMax, int nLeafMax, int nDivMax, int nDecMax, int fVerbose, int fVeryVerbose );
        Abc_Ntk_t * pNtkRes = Au_ManPerformTest( pNtk, nCutMax, nLeafMax, nDivMax, nDecMax, fVerbose, fVeryVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "Command has failed.\n" );
            return 1;
        }
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    }
*/
/*
    if ( pNtk )
    {
        Aig_Man_t * pAig = Abc_NtkToDar( pNtk, 0, 1 );
        Saig_ManBmcTerSimTestPo( pAig );
        Aig_ManStop( pAig );
    }
*/
/*
    if ( !Abc_NtkIsTopo(pNtk) )
    {
        Abc_Print( -1, "Current network is not in a topological order.\n" );
        return 1;
    }
*/
//    if ( pNtk )
//        Abc_NtkMakeLegit( pNtk );
    {
//        extern void Ifd_ManDsdTest();
//        Ifd_ManDsdTest();
    }
/*
    {
        extern void Abc_EnumerateCubeStates();
        extern void Abc_EnumerateCubeStatesZdd();
        if ( fNewAlgo )
            Abc_EnumerateCubeStatesZdd();
        else
            Abc_EnumerateCubeStates();
        return 0;
    }
*/
    {
//        extern void Abc_EnumerateFuncs( int nDecMax, int nDivMax, int fVerbose );
//        Abc_EnumerateFuncs( 4, 7, 0 );
    }
/*
    if ( fNewAlgo )
    {
        extern void Abc_SuppTest( int nOnes, int nVars, int fUseSimple, int fCheck, int fVerbose );
        Abc_SuppTest( nNumOnes, nDecMax, fNewOrder, 0, fVerbose );
    }
    else
    {
        extern void Bmc_EcoMiterTest();
        Bmc_EcoMiterTest();
    }
*/

    {
//        extern void Nf_ManPrepareLibraryTest();
//        Nf_ManPrepareLibraryTest();
//        return 0;
    }
/*
    if ( pNtk )
    {
//        extern Abc_Ntk_t * Abc_NtkBarBufsOnOffTest( Abc_Ntk_t * pNtk );
//        Abc_Ntk_t * pNtkRes = Abc_NtkBarBufsOnOffTest( pNtk );
        extern Abc_Ntk_t * Abc_NtkPcmTest( Abc_Ntk_t * pNtk, int fNewAlgo, int fVerbose );
//        extern Abc_Ntk_t * Abc_NtkPcmTestAig( Abc_Ntk_t * pNtk, int fVerbose );
        Abc_Ntk_t * pNtkRes;
//        if ( Abc_NtkIsLogic(pNtk) )
            pNtkRes = Abc_NtkPcmTest( pNtk, fNewAlgo, fVerbose );
//        else
//            pNtkRes = Abc_NtkPcmTestAig( pNtk, fVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "Command has failed.\n" );
            return 1;
        }
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    }
*/
/*
    {
        extern void Abc_IsopTestNew();
        Abc_IsopTestNew();
    }
*/
    {
//        extern void Cba_PrsReadBlifTest();
//        Cba_PrsReadBlifTest();
    }
//    Abc_NtkComputePaths( Abc_FrameReadNtk(pAbc) );
    //Dau_NetworkEnumTest();
    //Extra_SimulationTest( nDivMax, nNumOnes, fNewOrder );
    //Mnist_ExperimentWithScaling( nDecMax );
    //Gyx_ProblemSolveTest();
/*
    {
        extern Abc_Ntk_t * Abc_NtkFromArray();
        Abc_Ntk_t * pNtkRes = Abc_NtkFromArray();
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    }
*/
    return 0;
usage:
    Abc_Print( -2, "usage: test [-CKDNM] [-aovwh] <file_name>\n" );
    Abc_Print( -2, "\t         testbench for new procedures\n" );
    Abc_Print( -2, "\t-C num : the max number of cuts [default = %d]\n", nCutMax );
    Abc_Print( -2, "\t-K num : the max number of leaves [default = %d]\n", nLeafMax );
    Abc_Print( -2, "\t-D num : the max number of divisors [default = %d]\n", nDivMax );
    Abc_Print( -2, "\t-N num : the max number of node inputs [default = %d]\n", nDecMax );
    Abc_Print( -2, "\t-M num : the max number of ones in the vector [default = %d]\n", nNumOnes );
    Abc_Print( -2, "\t-a     : toggle using new algorithm [default = %s]\n", fNewAlgo? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle using new ordering [default = %s]\n", fNewOrder? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing very verbose information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandQuaVar( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, iVar, fUniv, fVerbose, RetValue;
    extern int Abc_NtkQuantify( Abc_Ntk_t * pNtk, int fUniv, int iVar, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    iVar = 0;
    fUniv = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Iuvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            iVar = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iVar < 0 )
                goto usage;
            break;
        case 'u':
            fUniv ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum( pNtk ) )
    {
        Abc_Print( -1, "This command cannot be applied to an AIG with choice nodes.\n" );
        return 1;
    }

    // get the strashed network
    pNtkRes = Abc_NtkStrash( pNtk, 0, 1, 0 );
    RetValue = Abc_NtkQuantify( pNtkRes, fUniv, iVar, fVerbose );
    // clean temporary storage for the cofactors
    Abc_NtkCleanData( pNtkRes );
    Abc_AigCleanup( (Abc_Aig_t *)pNtkRes->pManFunc );
    // check the result
    if ( !RetValue )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: qvar [-I num] [-uvh]\n" );
    Abc_Print( -2, "\t         quantifies one variable using the AIG\n" );
    Abc_Print( -2, "\t-I num : the zero-based index of a variable to quantify [default = %d]\n", iVar );
    Abc_Print( -2, "\t-u     : toggle universal quantification [default = %s]\n", fUniv? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandQuaRel( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, iVar, fInputs, fVerbose;
    extern Abc_Ntk_t * Abc_NtkTransRel( Abc_Ntk_t * pNtk, int fInputs, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    iVar = 0;
    fInputs = 1;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Iqvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            iVar = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iVar < 0 )
                goto usage;
            break;
        case 'q':
            fInputs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum( pNtk ) )
    {
        Abc_Print( -1, "This command cannot be applied to an AIG with choice nodes.\n" );
        return 1;
    }
    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "This command works only for sequential circuits.\n" );
        return 1;
    }

    // get the strashed network
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 1, 0 );
        pNtkRes = Abc_NtkTransRel( pNtk, fInputs, fVerbose );
        Abc_NtkDelete( pNtk );
    }
    else
        pNtkRes = Abc_NtkTransRel( pNtk, fInputs, fVerbose );
    // check if the result is available
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: qrel [-qvh]\n" );
    Abc_Print( -2, "\t         computes transition relation of the sequential network\n" );
//    Abc_Print( -2, "\t-I num : the zero-based index of a variable to quantify [default = %d]\n", iVar );
    Abc_Print( -2, "\t-q     : perform quantification of inputs [default = %s]\n", fInputs? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandQuaReach( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nIters, fVerbose;
    extern Abc_Ntk_t * Abc_NtkReachability( Abc_Ntk_t * pNtk, int nIters, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nIters   = 256;
    fVerbose =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIters < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum( pNtk ) )
    {
        Abc_Print( -1, "This command cannot be applied to an AIG with choice nodes.\n" );
        return 1;
    }
    if ( !Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "This command works only for combinational transition relations.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    if ( Abc_NtkPoNum(pNtk) > 1 )
    {
        Abc_Print( -1, "The transition relation should have one output.\n" );
        return 1;
    }
    if ( Abc_NtkPiNum(pNtk) % 2 != 0 )
    {
        Abc_Print( -1, "The transition relation should have an even number of inputs.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkReachability( pNtk, nIters, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: qreach [-I num] [-vh]\n" );
    Abc_Print( -2, "\t         computes unreachable states using AIG-based quantification\n" );
    Abc_Print( -2, "\t         assumes that the current network is a transition relation\n" );
    Abc_Print( -2, "\t         assumes that the initial state is composed of all zeros\n" );
    Abc_Print( -2, "\t-I num : the number of image computations to perform [default = %d]\n", nIters );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSenseInput( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Vec_Int_t * vResult;
    int c, nConfLim, fVerbose;

    extern Vec_Int_t * Abc_NtkSensitivity( Abc_Ntk_t * pNtk, int nConfLim, int fVerbose );
    // set defaults
    nConfLim   = 1000;
    fVerbose   =    1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Cvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLim < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkGetChoiceNum( pNtk ) )
    {
        Abc_Print( -1, "This command cannot be applied to an AIG with choice nodes.\n" );
        return 1;
    }
    if ( !Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "This command works only for combinational transition relations.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    if ( Abc_NtkPoNum(pNtk) < 2 )
    {
        Abc_Print( -1, "The network should have at least two outputs.\n" );
        return 1;
    }

    vResult = Abc_NtkSensitivity( pNtk, nConfLim, fVerbose );
    Vec_IntFree( vResult );
    return 0;

usage:
    Abc_Print( -2, "usage: senseinput [-C num] [-vh]\n" );
    Abc_Print( -2, "\t         computes sensitivity of POs to PIs under constraint\n" );
    Abc_Print( -2, "\t         constraint should be represented as the last PO\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nConfLim );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIStrash( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes, * pNtkTemp;
    int c;
    extern Abc_Ntk_t * Abc_NtkIvyStrash( Abc_Ntk_t * pNtk );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        pNtkTemp = Abc_NtkStrash( pNtk, 0, 1, 0 );
        pNtkRes = Abc_NtkIvyStrash( pNtkTemp );
        Abc_NtkDelete( pNtkTemp );
    }
    else
        pNtkRes = Abc_NtkIvyStrash( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: istrash [-h]\n" );
    Abc_Print( -2, "\t         perform sequential structural hashing\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandICut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c, nInputs;
    extern void Abc_NtkIvyCuts( Abc_Ntk_t * pNtk, int nInputs );

    // set defaults
    nInputs = 5;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Kh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nInputs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInputs < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    Abc_NtkIvyCuts( pNtk, nInputs );
    return 0;

usage:
    Abc_Print( -2, "usage: icut [-K num] [-h]\n" );
    Abc_Print( -2, "\t         computes sequential cuts of the given size\n" );
    Abc_Print( -2, "\t-K num : the number of cut inputs (2 <= num <= 6) [default = %d]\n", nInputs );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIRewrite( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fUpdateLevel, fUseZeroCost, fVerbose;
    extern Abc_Ntk_t * Abc_NtkIvyRewrite( Abc_Ntk_t * pNtk, int fUpdateLevel, int fUseZeroCost, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fUpdateLevel = 1;
    fUseZeroCost = 0;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'z':
            fUseZeroCost ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkIvyRewrite( pNtk, fUpdateLevel, fUseZeroCost, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: irw [-lzvh]\n" );
    Abc_Print( -2, "\t         perform combinational AIG rewriting\n" );
    Abc_Print( -2, "\t-l     : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle using zero-cost replacements [default = %s]\n", fUseZeroCost? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDRewrite( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Dar_RwrPar_t Pars, * pPars = &Pars;
    int c;

    extern Abc_Ntk_t * Abc_NtkDRewrite( Abc_Ntk_t * pNtk, Dar_RwrPar_t * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Dar_ManDefaultRwrParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CNMflzrvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutsMax < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSubgMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSubgMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMinSaved = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMinSaved < 0 )
                goto usage;
            break;
        case 'f':
            pPars->fFanout ^= 1;
            break;
        case 'l':
            pPars->fUpdateLevel ^= 1;
            break;
        case 'z':
            pPars->fUseZeros ^= 1;
            break;
        case 'r':
            pPars->fRecycle ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pPars->fUseZeros )
        pPars->nMinSaved = 0;
    if ( pPars->nMinSaved == 0 )
        pPars->fUseZeros = 1;
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDRewrite( pNtk, pPars );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: drw [-C num] [-NM num] [-lfzrvwh]\n" );
    Abc_Print( -2, "\t         performs combinational AIG rewriting\n" );
    Abc_Print( -2, "\t-C num : the max number of cuts at a node [default = %d]\n", pPars->nCutsMax );
    Abc_Print( -2, "\t-N num : the max number of subgraphs tried [default = %d]\n", pPars->nSubgMax );
    Abc_Print( -2, "\t-M num : the min number of nodes saved after one step (0 <= num) [default = %d]\n", pPars->nMinSaved );
    Abc_Print( -2, "\t-l     : toggle preserving the number of levels [default = %s]\n", pPars->fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle representing fanouts [default = %s]\n", pPars->fFanout? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle using zero-cost replacements [default = %s]\n", pPars->fUseZeros? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle using cut recycling [default = %s]\n", pPars->fRecycle? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle very verbose printout [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDRefactor( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Dar_RefPar_t Pars, * pPars = &Pars;
    int c;

    extern Abc_Ntk_t * Abc_NtkDRefactor( Abc_Ntk_t * pNtk, Dar_RefPar_t * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Dar_ManDefaultRefParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "MKCelzvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMffcMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMffcMin < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLeafMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLeafMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutsMax < 0 )
                goto usage;
            break;
        case 'e':
            pPars->fExtend ^= 1;
            break;
        case 'l':
            pPars->fUpdateLevel ^= 1;
            break;
        case 'z':
            pPars->fUseZeros ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    if ( pPars->nLeafMax < 4 || pPars->nLeafMax > 15 )
    {
        Abc_Print( -1, "This command only works for cut sizes 4 <= K <= 15.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDRefactor( pNtk, pPars );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: drf [-M num] [-K num] [-C num] [-elzvwh]\n" );
    Abc_Print( -2, "\t         performs combinational AIG refactoring\n" );
    Abc_Print( -2, "\t-M num : the min MFFC size to attempt refactoring [default = %d]\n", pPars->nMffcMin );
    Abc_Print( -2, "\t-K num : the max number of cuts leaves [default = %d]\n", pPars->nLeafMax );
    Abc_Print( -2, "\t-C num : the max number of cuts to try at a node [default = %d]\n", pPars->nCutsMax );
    Abc_Print( -2, "\t-e     : toggle extending tbe cut below MFFC [default = %s]\n", pPars->fExtend? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle preserving the number of levels [default = %s]\n", pPars->fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle using zero-cost replacements [default = %s]\n", pPars->fUseZeros? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle very verbose printout [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDc2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fBalance, fVerbose, fUpdateLevel, fFanout, fPower, c;

    extern Abc_Ntk_t * Abc_NtkDC2( Abc_Ntk_t * pNtk, int fBalance, int fUpdateLevel, int fFanout, int fPower, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fBalance     = 0;
    fVerbose     = 0;
    fUpdateLevel = 0;
    fFanout      = 1;
    fPower       = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "blfpvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fBalance ^= 1;
            break;
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'f':
            fFanout ^= 1;
            break;
        case 'p':
            fPower ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDC2( pNtk, fBalance, fUpdateLevel, fFanout, fPower, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: dc2 [-blfpvh]\n" );
    Abc_Print( -2, "\t         performs combinational AIG optimization\n" );
    Abc_Print( -2, "\t-b     : toggle internal balancing [default = %s]\n", fBalance? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle updating level [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle representing fanouts [default = %s]\n", fFanout? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle power-aware rewriting [default = %s]\n", fPower? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDChoice( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fBalance, fVerbose, fUpdateLevel, fConstruct, c;
    int nConfMax, nLevelMax;

    extern Abc_Ntk_t * Abc_NtkDChoice( Abc_Ntk_t * pNtk, int fBalance, int fUpdateLevel, int fConstruct, int nConfMax, int nLevelMax, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fBalance     = 1;
    fUpdateLevel = 1;
    fConstruct   = 0;
    nConfMax     = 1000;
    nLevelMax    = 0;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CLblcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevelMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevelMax < 0 )
                goto usage;
            break;
        case 'b':
            fBalance ^= 1;
            break;
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'c':
            fConstruct ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDChoice( pNtk, fBalance, fUpdateLevel, fConstruct, nConfMax, nLevelMax, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: dchoice [-C num] [-L num] [-blcvh]\n" );
    Abc_Print( -2, "\t         performs partitioned choicing using new AIG package\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-L num : the max level of nodes to consider (0 = not used) [default = %d]\n", nLevelMax );
    Abc_Print( -2, "\t-b     : toggle internal balancing [default = %s]\n", fBalance? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle updating level [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle constructive computation of choices [default = %s]\n", fConstruct? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Dch_Pars_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    extern Abc_Ntk_t * Abc_NtkDch( Abc_Ntk_t * pNtk, Dch_Pars_t * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Dch_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WCSsptgcfrxvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSatVarMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSatVarMax < 0 )
                goto usage;
            break;
        case 's':
            pPars->fSynthesis ^= 1;
            break;
        case 'p':
            pPars->fPower ^= 1;
            break;
        case 't':
            pPars->fSimulateTfo ^= 1;
            break;
        case 'g':
            pPars->fUseGia ^= 1;
            break;
        case 'c':
            pPars->fUseCSat ^= 1;
            break;
        case 'f':
            pPars->fLightSynth ^= 1;
            break;
        case 'r':
            pPars->fSkipRedSupp ^= 1;
            break;
        case 'x':
            pPars->fUseNew ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDch( pNtk, pPars );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: dch [-WCS num] [-sptgcfrxvh]\n" );
    Abc_Print( -2, "\t         computes structural choices using a new approach\n" );
    Abc_Print( -2, "\t-W num : the max number of simulation words [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-S num : the max number of SAT variables [default = %d]\n", pPars->nSatVarMax );
    Abc_Print( -2, "\t-s     : toggle synthesizing three snapshots [default = %s]\n", pPars->fSynthesis? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle power-aware rewriting [default = %s]\n", pPars->fPower? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle simulation of the TFO classes [default = %s]\n", pPars->fSimulateTfo? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle using GIA to prove equivalences [default = %s]\n", pPars->fUseGia? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle using circuit-based SAT vs. MiniSat [default = %s]\n", pPars->fUseCSat? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle using faster logic synthesis [default = %s]\n", pPars->fLightSynth? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle skipping choices with redundant support [default = %s]\n", pPars->fSkipRedSupp? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle using new choice computation [default = %s]\n", pPars->fUseNew? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDrwsat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fBalance, fVerbose, c;

    extern Abc_Ntk_t * Abc_NtkDrwsat( Abc_Ntk_t * pNtk, int fBalance, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fBalance = 0;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fBalance ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDrwsat( pNtk, fBalance, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: drwsat [-bvh]\n" );
    Abc_Print( -2, "\t         performs combinational AIG optimization for SAT\n" );
    Abc_Print( -2, "\t-b     : toggle internal balancing [default = %s]\n", fBalance? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIRewriteSeq( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fUpdateLevel, fUseZeroCost, fVerbose;
    extern Abc_Ntk_t * Abc_NtkIvyRewriteSeq( Abc_Ntk_t * pNtk, int fUseZeroCost, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fUpdateLevel = 0;
    fUseZeroCost = 0;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'z':
            fUseZeroCost ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkIvyRewriteSeq( pNtk, fUseZeroCost, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: irws [-zvh]\n" );
    Abc_Print( -2, "\t         perform sequential AIG rewriting\n" );
//    Abc_Print( -2, "\t-l     : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle using zero-cost replacements [default = %s]\n", fUseZeroCost? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIResyn( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fUpdateLevel, fVerbose;
    extern Abc_Ntk_t * Abc_NtkIvyResyn( Abc_Ntk_t * pNtk, int fUpdateLevel, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fUpdateLevel = 1;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkIvyResyn( pNtk, fUpdateLevel, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: iresyn [-lvh]\n" );
    Abc_Print( -2, "\t         performs combinational resynthesis\n" );
    Abc_Print( -2, "\t-l     : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandISat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fUpdateLevel, fVerbose;
    int nConfLimit;

    extern Abc_Ntk_t * Abc_NtkIvySat( Abc_Ntk_t * pNtk, int nConfLimit, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nConfLimit   = 100000;
    fUpdateLevel = 1;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Clzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkIvySat( pNtk, nConfLimit, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: isat [-C num] [-vh]\n" );
    Abc_Print( -2, "\t         tries to prove the miter constant 0\n" );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n",    nConfLimit );
//    Abc_Print( -2, "\t-l     : toggle preserving the number of levels [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIFraig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, fProve, fVerbose, fDoSparse;
    int nConfLimit;
    int nPartSize;
    int nLevelMax;

    extern Abc_Ntk_t * Abc_NtkIvyFraig( Abc_Ntk_t * pNtk, int nConfLimit, int fDoSparse, int fProve, int fTransfer, int fVerbose );
    extern Abc_Ntk_t * Abc_NtkDarFraigPart( Abc_Ntk_t * pNtk, int nPartSize, int nConfLimit, int nLevelMax, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nPartSize    = 0;
    nLevelMax    = 0;
    nConfLimit   = 100;
    fDoSparse    = 1;
    fProve       = 0;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PCLspvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPartSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPartSize < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
         case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevelMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevelMax < 0 )
                goto usage;
            break;
        case 's':
            fDoSparse ^= 1;
            break;
        case 'p':
            fProve ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    if ( nPartSize > 0 )
        pNtkRes = Abc_NtkDarFraigPart( pNtk, nPartSize, nConfLimit, nLevelMax, fVerbose );
    else
        pNtkRes = Abc_NtkIvyFraig( pNtk, nConfLimit, fDoSparse, fProve, 0, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: ifraig [-P num] [-C num] [-L num] [-spvh]\n" );
    Abc_Print( -2, "\t         performs fraiging using a new method\n" );
    Abc_Print( -2, "\t-P num : partition size (0 = partitioning is not used) [default = %d]\n", nPartSize );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n", nConfLimit );
    Abc_Print( -2, "\t-L num : limit on node level to fraig (0 = fraig all nodes) [default = %d]\n", nLevelMax );
    Abc_Print( -2, "\t-s     : toggle considering sparse functions [default = %s]\n", fDoSparse? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle proving the miter outputs [default = %s]\n", fProve? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDFraig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nConfLimit, fDoSparse, fProve, fSpeculate, fChoicing, fVerbose;

    extern Abc_Ntk_t * Abc_NtkDarFraig( Abc_Ntk_t * pNtk, int nConfLimit, int fDoSparse, int fProve, int fTransfer, int fSpeculate, int fChoicing, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nConfLimit   = 100;
    fDoSparse    = 1;
    fProve       = 0;
    fSpeculate   = 0;
    fChoicing    = 0;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Csprcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 's':
            fDoSparse ^= 1;
            break;
        case 'p':
            fProve ^= 1;
            break;
        case 'r':
            fSpeculate ^= 1;
            break;
        case 'c':
            fChoicing ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkDarFraig( pNtk, nConfLimit, fDoSparse, fProve, 0, fSpeculate, fChoicing, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: dfraig [-C num] [-sprcvh]\n" );
    Abc_Print( -2, "\t         performs fraiging using a new method\n" );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n", nConfLimit );
    Abc_Print( -2, "\t-s     : toggle considering sparse functions [default = %s]\n", fDoSparse? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle proving the miter outputs [default = %s]\n", fProve? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle speculative reduction [default = %s]\n", fSpeculate? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle accumulation of choices [default = %s]\n", fChoicing? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCSweep( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nCutsMax, nLeafMax, fVerbose;

    extern Abc_Ntk_t * Abc_NtkCSweep( Abc_Ntk_t * pNtk, int nCutsMax, int nLeafMax, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nCutsMax  =  8;
    nLeafMax  =  6;
    fVerbose  =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CKvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutsMax < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLeafMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLeafMax < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( nCutsMax < 2 )
    {
        Abc_Print( -1, "The number of cuts cannot be less than 2.\n" );
        return 1;
    }

    if ( nLeafMax < 3 || nLeafMax > 16 )
    {
        Abc_Print( -1, "The number of leaves is infeasible.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkCSweep( pNtk, nCutsMax, nLeafMax, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: csweep [-C num] [-K num] [-vh]\n" );
    Abc_Print( -2, "\t         performs cut sweeping using a new method\n" );
    Abc_Print( -2, "\t-C num : limit on the number of cuts (C >= 2) [default = %d]\n", nCutsMax );
    Abc_Print( -2, "\t-K num : limit on the cut size (3 <= K <= 16) [default = %d]\n", nLeafMax );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIProve( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Prove_Params_t Params, * pParams = &Params;
    Abc_Ntk_t * pNtk, * pNtkTemp;
    int c, RetValue, iOut = -1;
    char * pLogFileName = NULL;
    abctime clk;

    extern int Abc_NtkIvyProve( Abc_Ntk_t ** ppNtk, void * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Prove_ParamsSetDefault( pParams );
    pParams->fUseRewriting = 1;
    pParams->fVerbose      = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NCFGMILrfbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nItersMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nItersMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nMiteringLimitStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nMiteringLimitStart < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nFraigingLimitStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nFraigingLimitStart < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nFraigingLimitMulti = (float)atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nFraigingLimitMulti < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nMiteringLimitLast = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nMiteringLimitLast < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nTotalInspectLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nTotalInspectLimit < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            pParams->fUseRewriting ^= 1;
            break;
        case 'f':
            pParams->fUseFraiging ^= 1;
            break;
        case 'b':
            pParams->fUseBdds ^= 1;
            break;
        case 'v':
            pParams->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "The network has registers. Use \"dprove\".\n" );
        return 1;
    }

    clk = Abc_Clock();

    if ( Abc_NtkIsStrash(pNtk) )
        pNtkTemp = Abc_NtkDup( pNtk );
    else
        pNtkTemp = Abc_NtkStrash( pNtk, 0, 0, 0 );

    RetValue = Abc_NtkIvyProve( &pNtkTemp, pParams );

    // verify that the pattern is correct
    if ( RetValue == 0 )
    {
        Abc_Obj_t * pObj;
        int i;
        int * pSimInfo = Abc_NtkVerifySimulatePattern( pNtk, pNtkTemp->pModel );
        Abc_NtkForEachCo( pNtk, pObj, i )
            if ( pSimInfo[i] == 1 )
            {
                iOut = i;
                break;
            }
        if ( i == Abc_NtkCoNum(pNtk) )
            Abc_Print( 1, "ERROR in Abc_NtkMiterProve(): Generated counter-example is invalid.\n" );
        ABC_FREE( pSimInfo );
    }
    pAbc->Status = RetValue;
    if ( RetValue == -1 )
        Abc_Print( 1, "UNDECIDED      " );
    else if ( RetValue == 0 )
        Abc_Print( 1, "SATISFIABLE (output = %d) ", iOut );
    else
        Abc_Print( 1, "UNSATISFIABLE  " );
    //Abc_Print( -1, "\n" );

    Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkTemp );
    // update counter example
    if ( RetValue == 0 && Abc_NtkLatchNum(pNtkTemp) == 0 )
    {
        Abc_Cex_t * pCex = Abc_CexDeriveFromCombModel( pNtkTemp->pModel, Abc_NtkPiNum(pNtkTemp), 0, iOut );
        Abc_FrameReplaceCex( pAbc, &pCex );
    }
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "iprove" );
    return 0;

usage:
    Abc_Print( -2, "usage: iprove [-NCFGMI num] [-L file] [-rfbvh]\n" );
    Abc_Print( -2, "\t         performs CEC using a new method\n" );
    Abc_Print( -2, "\t-N num : max number of iterations [default = %d]\n", pParams->nItersMax );
    Abc_Print( -2, "\t-C num : max starting number of conflicts in mitering [default = %d]\n", pParams->nMiteringLimitStart );
    Abc_Print( -2, "\t-F num : max starting number of conflicts in fraiging [default = %d]\n", pParams->nFraigingLimitStart );
    Abc_Print( -2, "\t-G num : multiplicative coefficient for fraiging [default = %d]\n", (int)pParams->nFraigingLimitMulti );
    Abc_Print( -2, "\t-M num : max last-gasp number of conflicts in mitering [default = %d]\n", pParams->nMiteringLimitLast );
    Abc_Print( -2, "\t-I num : max number of clause inspections in all SAT calls [default = %d]\n", (int)pParams->nTotalInspectLimit );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n",                            pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-r     : toggle the use of rewriting [default = %s]\n", pParams->fUseRewriting? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle the use of FRAIGing [default = %s]\n", pParams->fUseFraiging? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle the use of BDDs [default = %s]\n", pParams->fUseBdds? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", pParams->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
/*
int Abc_CommandHaig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * stdout, * pErr;
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int nIters;
    int nSteps;
    int fRetimingOnly;
    int fAddBugs;
    int fUseCnf;
    int fVerbose;

    extern Abc_Ntk_t * Abc_NtkDarHaigRecord( Abc_Ntk_t * pNtk, int nIters, int nSteps, int fRetimingOnly, int fAddBugs, int fUseCnf, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);



    // set defaults
    nIters        = 3;
    nSteps        = 3000;
    fRetimingOnly = 0;
    fAddBugs      = 0;
    fUseCnf       = 0;
    fVerbose      = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ISrbcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIters < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nSteps = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSteps < 0 )
                goto usage;
            break;
        case 'r':
            fRetimingOnly ^= 1;
            break;
        case 'b':
            fAddBugs ^= 1;
            break;
        case 'c':
            fUseCnf ^= 1;
            break;
        case 'v':
            fUseCnf ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for strashed networks.\n" );
        return 1;
    }

    pNtkRes = Abc_NtkDarHaigRecord( pNtk, nIters, nSteps, fRetimingOnly, fAddBugs, fUseCnf, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: haig [-IS num] [-rbcvh]\n" );
    Abc_Print( -2, "\t         run a few rounds of comb+seq synthesis to test HAIG recording\n" );
    Abc_Print( -2, "\t         the current network is set to be the result of synthesis performed\n" );
    Abc_Print( -2, "\t         (this network can be verified using command \"dsec\")\n" );
    Abc_Print( -2, "\t         HAIG is written out into the file \"haig.blif\"\n" );
    Abc_Print( -2, "\t         (this HAIG can be proved using \"r haig.blif; st; dprove -abc -F 16\")\n" );
    Abc_Print( -2, "\t-I num : the number of rounds of comb+seq synthesis [default = %d]\n", nIters );
    Abc_Print( -2, "\t-S num : the number of forward retiming moves performed [default = %d]\n", nSteps );
    Abc_Print( -2, "\t-r     : toggle the use of retiming only [default = %s]\n", fRetimingOnly? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle bug insertion [default = %s]\n", fAddBugs? "yes": "no" );
    Abc_Print( -2, "\t-c     : enable CNF-based proof (no speculative reduction) [default = %s]\n", fUseCnf? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}
*/

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandQbf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nPars;
    int nIters;
    int fDumpCnf;
    int fVerbose;

    extern void Abc_NtkQbf( Abc_Ntk_t * pNtk, int nPars, int nIters, int fDumpCnf, int fVerbose );
    // set defaults
    nPars    =  -1;
    nIters   = 500;
    fDumpCnf =   0;
    fVerbose =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PIdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPars < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIters < 0 )
                goto usage;
            break;
        case 'd':
            fDumpCnf ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "Works only for combinational networks.\n" );
        return 1;
    }
    if ( Abc_NtkPoNum(pNtk) != 1 )
    {
        Abc_Print( -1, "The miter should have one primary output.\n" );
        return 1;
    }
    if ( !(nPars > 0 && nPars < Abc_NtkPiNum(pNtk)) )
    {
        Abc_Print( -1, "The number of parameter variables is invalid (should be > 0 and < PI num).\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
        Abc_NtkQbf( pNtk, nPars, nIters, fDumpCnf, fVerbose );
    else
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 1, 0 );
        Abc_NtkQbf( pNtk, nPars, nIters, fDumpCnf, fVerbose );
        Abc_NtkDelete( pNtk );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: qbf [-PI num] [-dvh]\n" );
    Abc_Print( -2, "\t         solves QBF problem EpVxM(p,x)\n" );
    Abc_Print( -2, "\t-P num : number of parameters p (should be the first PIs) [default = %d]\n", nPars );
    Abc_Print( -2, "\t-I num : quit after the given iteration even if unsolved [default = %d]\n", nIters );
    Abc_Print( -2, "\t-d     : toggle dumping QDIMACS file instead of solving [default = %s]\n", fDumpCnf? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandNpnLoad( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Npn_ManLoad( char * pFileName );
    char * pFileName;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 1 )
        goto usage;
    pFileName = argv[globalUtilOptind];
    Npn_ManLoad( pFileName );
    return 0;

usage:
    Abc_Print( -2, "usage: npnload <filename>\n" );
    Abc_Print( -2, "\t         loads previously saved 6-input function library from file\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandNpnSave( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Npn_ManSave( char * pFileName );
    char * pFileName;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 1 )
        goto usage;
    pFileName = argv[globalUtilOptind];
    Npn_ManSave( pFileName );
    return 0;

usage:
    Abc_Print( -2, "usage: npnsave <filename>\n" );
    Abc_Print( -2, "\t         saves current 6-input function library into file\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSendAig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    const int BRIDGE_NETLIST = 106;
//    const int BRIDGE_ABS_NETLIST = 107;

    int c, fAndSpace = 1, fAbsNetlist = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ah" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fAndSpace ^= 1;
            break;
        case 'b':
            fAbsNetlist ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_FrameIsBridgeMode() )
    {
        Abc_Print( -1, "The bridge mode is not available.\n" );
        return 1;
    }
    if ( fAndSpace )
    {
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "There is no AIG in the &-space.\n" );
            return 1;
        }
        Gia_ManToBridgeAbsNetlist( stdout, pAbc->pGia, fAbsNetlist ? BRIDGE_ABS_NETLIST : BRIDGE_NETLIST );
    }
    else
    {
        Aig_Man_t * pAig;
        Gia_Man_t * pGia;
        if ( pAbc->pNtkCur == NULL )
        {
            Abc_Print( -1, "There is no network in the main-space.\n" );
            return 1;
        }
        if ( !Abc_NtkIsStrash(pAbc->pNtkCur) )
        {
            Abc_Print( -1, "The main-space network is not an AIG.\n" );
            return 1;
        }
        pAig = Abc_NtkToDar( pAbc->pNtkCur, 0, 1 );
        pGia = Gia_ManFromAig( pAig );
        Aig_ManStop( pAig );
        Gia_ManToBridgeAbsNetlist( stdout, pGia, fAbsNetlist ? BRIDGE_ABS_NETLIST : BRIDGE_NETLIST  );
        Gia_ManStop( pGia );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: send_aig -a\n" );
    Abc_Print( -2, "\t         sends current AIG to the bridge\n" );
    Abc_Print( -2, "\t-a     : toggle sending AIG from &-space [default = %s]\n", fAndSpace? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle sending netlist tagged as \"abstraction\". [default = %s]\n", fAbsNetlist? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSendStatus( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gia_ManToBridgeResult( FILE * pFile, int Result, Abc_Cex_t * pCex, int iPoProved );
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_FrameIsBridgeMode() )
    {
        Abc_Print( -1, "The bridge mode is not available.\n" );
        return 1;
    }
    if ( pAbc->Status == 0 && pAbc->pCex == NULL )
    {
        Abc_Print( -1, "Status is \"sat\", but current CEX is not available.\n" );
        return 1;
    }
    Gia_ManToBridgeResult( stdout, pAbc->Status, pAbc->pCex, 0 );
    return 0;

usage:
    Abc_Print( -2, "usage: send_status\n" );
    Abc_Print( -2, "\t         sends current status to the bridge\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBackup( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( pAbc->pNtkBackup )
        Abc_NtkDelete( pAbc->pNtkBackup );
    pAbc->pNtkBackup = Abc_NtkDup( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: backup [-h]\n" );
    Abc_Print( -2, "\t        backs up the current network\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}
int Abc_CommandRestore( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pAbc->pNtkBackup == NULL )
    {
        Abc_Print( -1, "There is no backup network.\n" );
        return 1;
    }
    Abc_FrameReplaceCurrentNetwork( pAbc, Abc_NtkDup(pAbc->pNtkBackup) );
    pAbc->nFrames = -1;
    pAbc->Status = -1;
    return 0;

usage:
    Abc_Print( -2, "usage: restore [-h]\n" );
    Abc_Print( -2, "\t        restores the current network\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMinisat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
#ifdef USE_MINISAT22
    extern int MainSat(int argc, char** argv);
    MainSat( argc, argv );
#else
    printf( "This command is currently disabled.\n" );
#endif
    return 1;
}
int Abc_CommandMinisimp( Abc_Frame_t * pAbc, int argc, char ** argv )
{
#ifdef USE_MINISAT22
    extern int MainSimp(int argc, char** argv);
    MainSimp( argc, argv );
#else
    printf( "This command is currently disabled.\n" );
#endif
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFraig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[100];
    Fraig_Params_t Params, * pParams = &Params;
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fAllNodes;
    int fExdc;
    int c;
    int fPartition = 0;
    extern void Abc_NtkFraigPartitionedTime( Abc_Ntk_t * pNtk, void * pParams );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fExdc     = 0;
    fAllNodes = 0;
    memset( pParams, 0, sizeof(Fraig_Params_t) );
    pParams->nPatsRand  = 2048; // the number of words of random simulation info
    pParams->nPatsDyna  = 2048; // the number of words of dynamic simulation info
    pParams->nBTLimit   =  100; // the max number of backtracks to perform
    pParams->fFuncRed   =    1; // performs only one level hashing
    pParams->fFeedBack  =    1; // enables solver feedback
    pParams->fDist1Pats =    1; // enables distance-1 patterns
    pParams->fDoSparse  =    1; // performs equiv tests for sparse functions
    pParams->fChoicing  =    0; // enables recording structural choices
    pParams->fTryProve  =    0; // tries to solve the final miter
    pParams->fVerbose   =    0; // the verbosiness flag
    pParams->fVerboseP  =    0; // the verbosiness flag
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "RDCrscptvaeh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nPatsRand = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nPatsRand < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nPatsDyna = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nPatsDyna < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nBTLimit < 0 )
                goto usage;
            break;

        case 'r':
            pParams->fFuncRed ^= 1;
            break;
        case 's':
            pParams->fDoSparse ^= 1;
            break;
        case 'c':
            pParams->fChoicing ^= 1;
            break;
        case 'p':
            pParams->fTryProve ^= 1;
            break;
        case 'v':
            pParams->fVerbose ^= 1;
            break;
        case 't':
            fPartition ^= 1;
            break;
        case 'a':
            fAllNodes ^= 1;
            break;
        case 'e':
            fExdc ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Can only fraig a logic network or an AIG.\n" );
        return 1;
    }

    // report the proof
    pParams->fVerboseP = pParams->fTryProve;

    // get the new network
    if ( fPartition )
    {
        pNtkRes = Abc_NtkDup( pNtk );
        if ( Abc_NtkIsStrash(pNtk) )
            Abc_NtkFraigPartitionedTime( pNtk, &Params );
        else
        {
            pNtk = Abc_NtkStrash( pNtk, fAllNodes, !fAllNodes, 0 );
            Abc_NtkFraigPartitionedTime( pNtk, &Params );
            Abc_NtkDelete( pNtk );
        }
    }
    else
    {
        if ( Abc_NtkIsStrash(pNtk) )
            pNtkRes = Abc_NtkFraig( pNtk, &Params, fAllNodes, fExdc );
        else
        {
            pNtk = Abc_NtkStrash( pNtk, fAllNodes, !fAllNodes, 0 );
            pNtkRes = Abc_NtkFraig( pNtk, &Params, fAllNodes, fExdc );
            Abc_NtkDelete( pNtk );
        }
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Fraiging has failed.\n" );
        return 1;
    }

    if ( pParams->fTryProve ) // report the result
        Abc_NtkMiterReport( pNtkRes );

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    sprintf(Buffer, "%d", pParams->nBTLimit );
    Abc_Print( -2, "usage: fraig [-R num] [-D num] [-C num] [-rscpvtah]\n" );
    Abc_Print( -2, "\t         transforms a logic network into a functionally reduced AIG\n" );
    Abc_Print( -2, "\t         (known bugs: takes an UNSAT miter and returns a SAT one)\n");
    Abc_Print( -2, "\t         (there are newer fraiging commands, \"ifraig\" and \"dfraig\")\n" );
    Abc_Print( -2, "\t-R num : number of random patterns (127 < num < 32769) [default = %d]\n",     pParams->nPatsRand );
    Abc_Print( -2, "\t-D num : number of systematic patterns (127 < num < 32769) [default = %d]\n", pParams->nPatsDyna );
    Abc_Print( -2, "\t-C num : number of backtracks for one SAT problem [default = %s]\n",    pParams->nBTLimit==-1? "infinity" : Buffer );
    Abc_Print( -2, "\t-r     : toggle functional reduction [default = %s]\n",                 pParams->fFuncRed? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle considering sparse functions [default = %s]\n",         pParams->fDoSparse? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle accumulation of choices [default = %s]\n",              pParams->fChoicing? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle proving the miter outputs [default = %s]\n",              pParams->fTryProve? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n",                       pParams->fVerbose?  "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle functional sweeping using EXDC [default = %s]\n",       fExdc? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle between all nodes and DFS nodes [default = %s]\n",      fAllNodes? "all": "dfs" );
    Abc_Print( -2, "\t-t     : toggle using partitioned representation [default = %s]\n",     fPartition? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFraigTrust( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fDuplicate;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fDuplicate = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "dh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'd':
            fDuplicate ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkFraigTrust( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Fraiging in the trust mode has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: fraig_trust [-h]\n" );
    Abc_Print( -2, "\t        transforms the current network into an AIG assuming it is FRAIG with choices\n" );
//    Abc_Print( -2, "\t-d    : toggle duplication of logic [default = %s]\n", fDuplicate? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFraigStore( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fDuplicate;

    // set defaults
    fDuplicate = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "dh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'd':
            fDuplicate ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkFraigStore( pNtk ) )
    {
        Abc_Print( -1, "Fraig storing has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: fraig_store [-h]\n" );
    Abc_Print( -2, "\t        saves the current network in the AIG database\n" );
//    Abc_Print( -2, "\t-d    : toggle duplication of logic [default = %s]\n", fDuplicate? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFraigRestore( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int nPatsRand  =    0;    // the number of words of random simulation info
    int nPatsDyna  =    0;    // the number of words of dynamic simulation info
    int nBTLimit   = 1000;    // the max number of backtracks to perform

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "RDCh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nPatsRand = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPatsRand < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nPatsDyna = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPatsDyna < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimit < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkFraigRestore( nPatsRand, nPatsDyna, nBTLimit );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Fraig restoring has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: fraig_restore [-RDC num] [-h]\n" );
    Abc_Print( -2, "\t         makes the current network by fraiging the AIG database\n" );
    Abc_Print( -2, "\t-R num : number of random patterns (127 < num < 32769) [default = design-dependent]\n" );
    Abc_Print( -2, "\t-D num : number of systematic patterns (127 < num < 32769) [default = design-dependent]\n" );
    Abc_Print( -2, "\t-C num : number of backtracks for one SAT problem [default = %d]\n",  nBTLimit );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFraigClean( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fDuplicate;
    // set defaults
    fDuplicate = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "dh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'd':
            fDuplicate ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    Abc_NtkFraigStoreClean();
    return 0;

usage:
    Abc_Print( -2, "usage: fraig_clean [-h]\n" );
    Abc_Print( -2, "\t        cleans the internal FRAIG storage\n" );
//    Abc_Print( -2, "\t-d    : toggle duplication of logic [default = %s]\n", fDuplicate? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFraigSweep( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseInv;
    int fExdc;
    int fVerbose;
    int fVeryVerbose;
    extern int Abc_NtkFraigSweep( Abc_Ntk_t * pNtk, int fUseInv, int fExdc, int fVerbose, int fVeryVerbose );
    // set defaults
    fUseInv   = 1;
    fExdc     = 0;
    fVerbose  = 0;
    fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ievwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'i':
            fUseInv ^= 1;
            break;
        case 'e':
            fExdc ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Cannot sweep AIGs (use \"fraig\").\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Transform the current network into a logic network.\n" );
        return 1;
    }
    // modify the current network
    if ( !Abc_NtkFraigSweep( pNtk, fUseInv, fExdc, fVerbose, fVeryVerbose ) )
    {
        Abc_Print( -1, "Sweeping has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: fraig_sweep [-evwh]\n" );
    Abc_Print( -2, "\t        performs technology-dependent sweep\n" );
    Abc_Print( -2, "\t-e    : toggle functional sweeping using EXDC [default = %s]\n", fExdc? "yes": "no" );
    Abc_Print( -2, "\t-v    : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w    : prints equivalence class information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFraigDress( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkDress( Abc_Ntk_t * pNtk, char * pFileName, int fVerbose );
    extern void Abc_NtkDress2( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nConflictLimit, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtk2;
    char * pFileName;
    int c;
    int nConfs;
    int fVerbose;
    // set defaults
    nConfs   = 1000;
    fVerbose =    0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Cvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfs < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for logic networks.\n" );
        return 1;
    }
    if ( argc != globalUtilOptind && argc != globalUtilOptind + 1 )
        goto usage;
    if ( argc == globalUtilOptind && Abc_NtkSpec(pNtk) == NULL )
    {
        Abc_Print( -1, "The current network has no spec.\n" );
        return 1;
    }
    // get the input file name
    pFileName = (argc == globalUtilOptind + 1) ? argv[globalUtilOptind] : Abc_NtkSpec(pNtk);
    // modify the current network
//    Abc_NtkDress( pNtk, pFileName, fVerbose );
    pNtk2 = Io_Read( pFileName, Io_ReadFileType(pFileName), 1, 0 );
    Abc_NtkDress2( pNtk, pNtk2, nConfs, fVerbose );
    Abc_NtkDelete( pNtk2 );
    return 0;

usage:
    Abc_Print( -2, "usage: dress [-C num] [-vh] <file>\n" );
    Abc_Print( -2, "\t         transfers internal node names from file to the current network\n" );
    Abc_Print( -2, "\t<file> : network with names (if not given, the current network spec is used)\n" );
    Abc_Print( -2, "\t-C num : the maximum number of conflicts at each node [default = %d]\n", nConfs );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDumpEquiv( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkDumpEquiv( Abc_Ntk_t * pNtks[2], char * pFileName, int nConfs, int fByName, int fVerbose );
    Abc_Ntk_t * pNtks[2] = {NULL};
    char * pFileName[2], * pFileNameOut;
    int c, nConfs = 1000, fByName = 1, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Cnvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfs < 0 )
                goto usage;
            break;
        case 'n':
            fByName ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 3 )
    {
        Abc_Print( -1, "Expecting three file names on the command line.\n" );
        goto usage;
    }
    pFileName[0] = argv[globalUtilOptind];
    pFileName[1] = argv[globalUtilOptind+1];
    pFileNameOut = argv[globalUtilOptind+2];
    for ( c = 0; c < 2; c++ )
    {
        pNtks[c] = Io_Read( pFileName[c], Io_ReadFileType(pFileName[c]), 1, 0 );
        if ( pNtks[c] == NULL )
            goto usage;
        Abc_NtkToAig( pNtks[c] );
    }
//    if ( Abc_NtkCiNum(pNtks[0]) != Abc_NtkCiNum(pNtks[1]) )
//        Abc_Print( -1, "The number of primary inputs of networks \"%s\" and \"%s\" does not match.\n", Abc_NtkName(pNtks[0]), Abc_NtkName(pNtks[1]) );
//    else if ( Abc_NtkCoNum(pNtks[0]) != Abc_NtkCoNum(pNtks[1]) )
//        Abc_Print( -1, "The number of primary outputs of networks \"%s\" and \"%s\" does not match.\n", Abc_NtkName(pNtks[0]), Abc_NtkName(pNtks[1]) );
//    else
        Abc_NtkDumpEquiv( pNtks, pFileNameOut, nConfs, fByName, fVerbose );
    Abc_NtkDelete( pNtks[0] );
    Abc_NtkDelete( pNtks[1] );
    return 0;

usage:
    Abc_Print( -2, "usage: dump_equiv [-C num] [-nvh] <file1.blif> <file2.blif> <file_dump_equiv.txt>\n" );
    Abc_Print( -2, "\t          computes equivalence classes of nodes in <file1> and <file2>\n" );
    Abc_Print( -2, "\t          By default this procedure performs matching of primary inputs by name.\n" );
    Abc_Print( -2, "\t          Those inputs that cannot be matched are treated as free variables.\n" );
    Abc_Print( -2, "\t          There is no effort to match primary outputs. Indeed, if two outputs\n" );
    Abc_Print( -2, "\t          are equivalent, they will belong to the same equivalence class in the end.\n" );
    Abc_Print( -2, "\t-C num  : the maximum number of conflicts at each node [default = %d]\n", nConfs );
    Abc_Print( -2, "\t-n      : enable matching of primary inputs by name [default = %s]\n", fByName? "yes": "no" );
    Abc_Print( -2, "\t-v      : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    Abc_Print( -2, "\t<file1> : first network whose nodes are considered\n" );
    Abc_Print( -2, "\t<file2> : second network whose nodes are considered\n" );
    Abc_Print( -2, "\t<file_dump_equiv> : text file with node equivalence classes\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRecStart3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * FileName, * pTemp;
    char ** pArgvNew;
    int c, nArgcNew;
    FILE * pFile;
    Gia_Man_t * pGia = NULL;
    int nVars = 6;
    int nCuts = 32;
    int fFuncOnly = 0;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCfvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 1 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCuts < 1 )
                goto usage;
            break;
        case 'f':
            fFuncOnly ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !(nVars >= 3 && nVars <= 16) )
    {
        Abc_Print( -1, "The range of allowed values is 3 <= K <= 16.\n" );
        return 0;
    }
    if ( Abc_NtkRecIsRunning3() )
    {
        Abc_Print( -1, "The AIG subgraph recording is already started.\n" );
        return 0;
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
        Abc_Print( 1, "File name is not given on the command line. Starting a new record.\n" );
    else
    {
        // get the input file name
        FileName = pArgvNew[0];
        // fix the wrong symbol
        for ( pTemp = FileName; *pTemp; pTemp++ )
            if ( *pTemp == '>' )
                *pTemp = '\\';
        if ( (pFile = fopen( FileName, "r" )) == NULL )
        {
            Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
            if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
                Abc_Print( 1, "Did you mean \"%s\"?", FileName );
            Abc_Print( 1, "\n" );
            return 1;
        }
        fclose( pFile );
        pGia = Gia_AigerRead( FileName, 0, 1, 0 );
        if ( pGia == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 0;
        }
    }
    Abc_NtkRecStart3( pGia, nVars, nCuts, fFuncOnly, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: rec_start3 [-K num] [-C num] [-fvh] <file>\n" );
    Abc_Print( -2, "\t         starts recording AIG subgraphs (should be called for\n" );
    Abc_Print( -2, "\t         an empty network or after reading in a previous record)\n" );
    Abc_Print( -2, "\t-K num : the largest number of inputs [default = %d]\n", nVars );
    Abc_Print( -2, "\t-C num : the max number of cuts used at a node (0 < num < 2^12) [default = %d]\n", nCuts );
    Abc_Print( -2, "\t-f     : toggles recording functions without AIG subgraphs [default = %s]\n", fFuncOnly? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles additional verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : AIGER file with the library\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRecStop3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "dh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_NtkRecIsRunning3() )
    {
        Abc_Print( -1, "This command works only after calling \"rec_start3\".\n" );
        return 0;
    }
    Abc_NtkRecStop3();
    return 0;

usage:
    Abc_Print( -2, "usage: rec_stop3 [-h]\n" );
    Abc_Print( -2, "\t        cleans the internal storage for AIG subgraphs\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRecPs3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fPrintLib = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ph" ) ) != EOF )
    {
        switch ( c )
        {
        case 'p':
            fPrintLib ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_NtkRecIsRunning3() )
    {
        Abc_Print( -1, "This command works for AIGs only after calling \"rec_start2\".\n" );
        return 0;
    }
    Abc_NtkRecPs3(fPrintLib);
    return 0;

usage:
    Abc_Print( -2, "usage: rec_ps3 [-h]\n" );
    Abc_Print( -2, "\t        prints statistics about the recorded AIG subgraphs\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRecAdd3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fUseSOPB = 0;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "gh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'g':
            fUseSOPB = 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works for AIGs.\n" );
        return 0;
    }
    if ( !Abc_NtkRecIsRunning3() )
    {
        Abc_Print( -1, "This command works for AIGs after calling \"rec_start2\".\n" );
        return 0;
    }
    Abc_NtkRecAdd3( pNtk, fUseSOPB );
    return 0;

usage:
    Abc_Print( -2, "usage: rec_add3 [-h]\n" );
    Abc_Print( -2, "\t        adds subgraphs from the current network to the set\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRecDump3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkRecDumpTt3( char * pFileName, int fBinary );
    char * FileName;
    char ** pArgvNew;
    int nArgcNew;
    Gia_Man_t * pGia;
    int fAscii = 0;
    int fBinary = 0;
    int c;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "abh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fAscii ^= 1;
            break;
        case 'b':
            fBinary ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_NtkRecIsRunning3() )
    {
        Abc_Print( -1, "The AIG subgraph recording is not started.\n" );
        return 1;
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    // get the input file name
    FileName = pArgvNew[0];
    if ( fAscii )
        Abc_NtkRecDumpTt3( FileName, 0 );
    else if ( fBinary )
        Abc_NtkRecDumpTt3( FileName, 1 );
    else
    {
        pGia = Abc_NtkRecGetGia3();
        if( pGia == NULL )
        {
            Abc_Print( 0, "Library AIG is not available.\n" );
            return 1;
        }
        if( Gia_ManPoNum(pGia) == 0 )
        {
            Abc_Print( 0, "No structure in the library.\n" );
            return 1;
        }
        Gia_AigerWrite( pGia, FileName, 0, 0, 0 );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: rec_dump3 [-abh] <file>\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t-a     : toggles dumping TTs into an ASCII file [default = %s]\n", fAscii? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggles dumping TTs into a binary file [default = %s]\n", fBinary? "yes": "no" );
    Abc_Print( -2, "\t<file> : AIGER file to write the library\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRecMerge3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    char * FileName, * pTemp;
    char ** pArgvNew;
    int nArgcNew;
    FILE * pFile;
    Gia_Man_t * pGia = NULL;

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "dh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_NtkRecIsRunning3() )
    {
        Abc_Print( -1, "This command works for AIGs only after calling \"rec_start3\".\n" );
        return 0;
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    else
    {
        // get the input file name
        FileName = pArgvNew[0];
        // fix the wrong symbol
        for ( pTemp = FileName; *pTemp; pTemp++ )
            if ( *pTemp == '>' )
                *pTemp = '\\';
        if ( (pFile = fopen( FileName, "r" )) == NULL )
        {
            Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
            if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
                Abc_Print( 1, "Did you mean \"%s\"?", FileName );
            Abc_Print( 1, "\n" );
            return 1;
        }
        fclose( pFile );
        pGia = Gia_AigerRead( FileName, 0, 1, 0 );
        if ( pGia == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 0;
        }
    }
    Abc_NtkRecLibMerge3(pGia);
    Gia_ManStop( pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: rec_merge3 [-h] <file>\n" );
    Abc_Print( -2, "\t         merge libraries\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : AIGER file with the library\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    char Buffer[100];
    double DelayTarget;
    double AreaMulti;
    double DelayMulti;
    float LogFan = 0;
    float Slew = 0; // choose based on the library
    float Gain = 250;
    int nGatesMin = 0;
    int fAreaOnly;
    int fRecovery;
    int fSweep;
    int fSwitching;
    int fSkipFanout;
    int fUseProfile;
    int fUseBuffs;
    int fVerbose;
    int c;
    extern Abc_Ntk_t * Abc_NtkMap( Abc_Ntk_t * pNtk, double DelayTarget, double AreaMulti, double DelayMulti, float LogFan, float Slew, float Gain, int nGatesMin, int fRecovery, int fSwitching, int fSkipFanout, int fUseProfile, int fUseBuffs, int fVerbose );
    extern int Abc_NtkFraigSweep( Abc_Ntk_t * pNtk, int fUseInv, int fExdc, int fVerbose, int fVeryVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    DelayTarget =-1;
    AreaMulti   = 0;
    DelayMulti  = 0;
    fAreaOnly   = 0;
    fRecovery   = 1;
    fSweep      = 0;
    fSwitching  = 0;
    fSkipFanout = 0;
    fUseProfile = 0;
    fUseBuffs   = 0;
    fVerbose    = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "DABFSGMarspfuovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            DelayTarget = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a floating point number.\n" );
                goto usage;
            }
            AreaMulti = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by a floating point number.\n" );
                goto usage;
            }
            DelayMulti = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a floating point number.\n" );
                goto usage;
            }
            LogFan = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( LogFan < 0.0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a floating point number.\n" );
                goto usage;
            }
            Slew = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Slew <= 0.0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by a floating point number.\n" );
                goto usage;
            }
            Gain = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Gain <= 0.0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nGatesMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nGatesMin < 0 )
                goto usage;
            break;
        case 'a':
            fAreaOnly ^= 1;
            break;
        case 'r':
            fRecovery ^= 1;
            break;
        case 's':
            fSweep ^= 1;
            break;
        case 'p':
            fSwitching ^= 1;
            break;
        case 'f':
            fSkipFanout ^= 1;
            break;
        case 'u':
            fUseProfile ^= 1;
            break;
        case 'o':
            fUseBuffs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fAreaOnly )
        DelayTarget = ABC_INFINITY;

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Strashing before mapping has failed.\n" );
            return 1;
        }
        pNtk = Abc_NtkBalance( pNtkRes = pNtk, 0, 0, 1 );
        Abc_NtkDelete( pNtkRes );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Balancing before mapping has failed.\n" );
            return 1;
        }
        Abc_Print( 0, "The network was strashed and balanced before mapping.\n" );
        // get the new network
        pNtkRes = Abc_NtkMap( pNtk, DelayTarget, AreaMulti, DelayMulti, LogFan, Slew, Gain, nGatesMin, fRecovery, fSwitching, fSkipFanout, fUseProfile, fUseBuffs, fVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_NtkDelete( pNtk );
            Abc_Print( -1, "Mapping has failed.\n" );
            return 1;
        }
        Abc_NtkDelete( pNtk );
    }
    else
    {
        // get the new network
        pNtkRes = Abc_NtkMap( pNtk, DelayTarget, AreaMulti, DelayMulti, LogFan, Slew, Gain, nGatesMin, fRecovery, fSwitching, fSkipFanout, fUseProfile, fUseBuffs, fVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "Mapping has failed.\n" );
            return 1;
        }
    }

    if ( fSweep )
    {
        Abc_NtkFraigSweep( pNtkRes, 0, 0, 0, 0 );
        if ( Abc_NtkHasMapping(pNtkRes) )
        {
            pNtkRes = Abc_NtkDupDfs( pNtk = pNtkRes );
            Abc_NtkDelete( pNtk );
        }
    }

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    if ( DelayTarget == -1 )
        sprintf(Buffer, "not used" );
    else
        sprintf(Buffer, "%.3f", DelayTarget );
    Abc_Print( -2, "usage: map [-DABFSG float] [-M num] [-arspfuovh]\n" );
    Abc_Print( -2, "\t           performs standard cell mapping of the current network\n" );
    Abc_Print( -2, "\t-D float : sets the global required times [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-A float : \"area multiplier\" to bias gate selection [default = %.2f]\n", AreaMulti );
    Abc_Print( -2, "\t-B float : \"delay multiplier\" to bias gate selection [default = %.2f]\n", DelayMulti );
    Abc_Print( -2, "\t-F float : the logarithmic fanout delay parameter [default = %.2f]\n", LogFan );
    Abc_Print( -2, "\t-S float : the slew parameter used to generate the library [default = %.2f]\n", Slew );
    Abc_Print( -2, "\t-G float : the gain parameter used to generate the library [default = %.2f]\n", Gain );
    Abc_Print( -2, "\t-M num   : skip gate classes whose size is less than this [default = %d]\n", nGatesMin );
    Abc_Print( -2, "\t-a       : toggles area-only mapping [default = %s]\n", fAreaOnly? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggles area recovery [default = %s]\n", fRecovery? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles sweep after mapping [default = %s]\n", fSweep? "yes": "no" );
    Abc_Print( -2, "\t-p       : optimizes power by minimizing switching [default = %s]\n", fSwitching? "yes": "no" );
    Abc_Print( -2, "\t-f       : do not use large gates to map high-fanout nodes [default = %s]\n", fSkipFanout? "yes": "no" );
    Abc_Print( -2, "\t-u       : use standard-cell profile [default = %s]\n", fUseProfile? "yes": "no" );
    Abc_Print( -2, "\t-o       : toggles using buffers to decouple combinational outputs [default = %s]\n", fUseBuffs? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAmap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Amap_Par_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fSweep;
    int c;
    extern Abc_Ntk_t * Abc_NtkDarAmap( Abc_Ntk_t * pNtk, Amap_Par_t * pPars );
    extern int Abc_NtkFraigSweep( Abc_Ntk_t * pNtk, int fUseInv, int fExdc, int fVerbose, int fVeryVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fSweep = 0;
    Amap_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FACEQmxisvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->nIterFlow = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterFlow < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->nIterArea = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterArea < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutsMax < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->fEpsilon = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->fEpsilon < 0.0 || pPars->fEpsilon > 1.0 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->fADratio = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->fADratio < 0.0 )
                goto usage;
            break;
        case 'm':
            pPars->fUseMuxes ^= 1;
            break;
        case 'x':
            pPars->fUseXors ^= 1;
            break;
        case 'i':
            pPars->fFreeInvs ^= 1;
            break;
        case 's':
            fSweep ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Strashing before mapping has failed.\n" );
            return 1;
        }
        pNtk = Abc_NtkBalance( pNtkRes = pNtk, 0, 0, 1 );
        Abc_NtkDelete( pNtkRes );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Balancing before mapping has failed.\n" );
            return 1;
        }
        Abc_Print( 0, "The network was strashed and balanced before mapping.\n" );
        // get the new network
        pNtkRes = Abc_NtkDarAmap( pNtk, pPars );
        if ( pNtkRes == NULL )
        {
            Abc_NtkDelete( pNtk );
            Abc_Print( -1, "Mapping has failed.\n" );
            return 1;
        }
        Abc_NtkDelete( pNtk );
    }
    else
    {
        // get the new network
        pNtkRes = Abc_NtkDarAmap( pNtk, pPars );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "Mapping has failed.\n" );
            return 1;
        }
    }

    if ( fSweep )
    {
        Abc_NtkFraigSweep( pNtkRes, 0, 0, 0, 0 );
        if ( Abc_NtkHasMapping(pNtkRes) )
        {
            pNtkRes = Abc_NtkDupDfs( pNtk = pNtkRes );
            Abc_NtkDelete( pNtk );
        }
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: amap [-FAC <num>] [-EQ <float>] [-mxisvh]\n" );
    Abc_Print( -2, "\t           performs standard cell mapping of the current network\n" );
    Abc_Print( -2, "\t-F num   : the number of iterations of area flow [default = %d]\n", pPars->nIterFlow );
    Abc_Print( -2, "\t-A num   : the number of iterations of exact area [default = %d]\n", pPars->nIterArea );
    Abc_Print( -2, "\t-C num   : the maximum number of cuts at a node [default = %d]\n", pPars->nCutsMax );
    Abc_Print( -2, "\t-E float : sets epsilon used for tie-breaking [default = %f]\n", pPars->fEpsilon );
    Abc_Print( -2, "\t-Q float : area/delay preference ratio [default = %.2f (area-only)] \n", pPars->fADratio );
    Abc_Print( -2, "\t-m       : toggles using MUX matching [default = %s]\n", pPars->fUseMuxes? "yes": "no" );
    Abc_Print( -2, "\t-x       : toggles using XOR matching [default = %s]\n", pPars->fUseXors? "yes": "no" );
    Abc_Print( -2, "\t-i       : toggles assuming inverters are free [default = %s]\n", pPars->fFreeInvs? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles sweep after mapping [default = %s]\n", fSweep? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPhaseMap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkChangePerform( Abc_Ntk_t * pNtk, int fVerbose );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int fVerbose = 0, c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkHasMapping(pNtk) )
    {
        Abc_Print( -1, "Cannot unmap the network that is not mapped.\n" );
        return 1;
    }
    Abc_NtkChangePerform( pNtk, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: phase_map [-vh]\n" );
    Abc_Print( -2, "\t        tries to replace each gate by its complement (area-only)\n" );
    Abc_Print( -2, "\t-v    : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandUnmap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkHasMapping(pNtk) )
    {
        Abc_Print( -1, "Cannot unmap the network that is not mapped.\n" );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkMapToSop( pNtk ) )
    {
        Abc_Print( -1, "Unmapping has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: unmap [-h]\n" );
    Abc_Print( -2, "\t        replaces the library gates by the logic nodes represented using SOPs\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAttach( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Can only attach gates if the nodes have SOP representations.\n" );
        return 1;
    }

    // get the new network
    if ( !Abc_NtkAttach( pNtk ) )
    {
        Abc_Print( -1, "Attaching gates has failed.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: attach [-h]\n" );
    Abc_Print( -2, "\t        replaces the SOP functions by the gates from the library\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSuperChoice( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    extern Abc_Ntk_t * Abc_NtkSuperChoice( Abc_Ntk_t * pNtk );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Superchoicing works only for the AIG representation (run \"strash\").\n" );
        return 1;
    }

    // get the new network
    pNtkRes = Abc_NtkSuperChoice( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Superchoicing has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: superc [-h]\n" );
    Abc_Print( -2, "\t      performs superchoicing\n" );
    Abc_Print( -2, "\t      (accumulate: \"r file.blif; rsup; b; sc; f -ac; wb file_sc.blif\")\n" );
    Abc_Print( -2, "\t      (map without supergate library: \"r file_sc.blif; ft; map\")\n" );
    Abc_Print( -2, "\t-h  : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSuperChoiceLut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int nLutSize;
    int nCutSizeMax;
    int fVerbose;
    extern int Abc_NtkSuperChoiceLut( Abc_Ntk_t * pNtk, int nLutSize, int nCutSizeMax, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fVerbose = 1;
    nLutSize = 4;
    nCutSizeMax = 10;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KNh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nCutSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutSizeMax < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Superchoicing works only for the AIG representation (run \"strash\").\n" );
        return 1;
    }

    // convert the network into the SOP network
    pNtkRes = Abc_NtkToLogic( pNtk );

    // get the new network
    if ( !Abc_NtkSuperChoiceLut( pNtkRes, nLutSize, nCutSizeMax, fVerbose ) )
    {
        Abc_NtkDelete( pNtkRes );
        Abc_Print( -1, "Superchoicing has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: supercl [-K num] [-N num] [-vh]\n" );
    Abc_Print( -2, "\t        performs superchoicing for K-LUTs\n" );
    Abc_Print( -2, "\t        (accumulate: \"r file.blif; b; scl; f -ac; wb file_sc.blif\")\n" );
    Abc_Print( -2, "\t        (FPGA map: \"r file_sc.blif; ft; read_lut lutlibK; fpga\")\n" );
    Abc_Print( -2, "\t-K num : the number of LUT inputs [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-N num : the max size of the cut [default = %d]\n", nCutSizeMax );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTimeScale( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkTimeScale( Abc_Ntk_t * pNtk, float Scale );
    Abc_Ntk_t * pNtk;
    float nTimeScale;
    int c, fVerbose;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nTimeScale = (float)0.01;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Th" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nTimeScale = atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeScale < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( pNtk->pManTime == NULL )
    {
        Abc_Print( -1, "Timing manager is not defined.\n" );
        return 1;
    }
    Abc_NtkTimeScale( pNtk, nTimeScale );
    return 0;

usage:
    Abc_Print( -2, "usage: timescale [-T float] [-vh]\n" );
    Abc_Print( -2, "\t           scales timing information of the current network\n" );
    Abc_Print( -2, "\t-T float : multiplicative factor [default = %f]\n", nTimeScale );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
#if 0
int Abc_CommandFpga( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[100];
    char LutSize[100];
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fRecovery;
    int fSwitching;
    int fLatchPaths;
    int fVerbose;
    int nLutSize;
    float DelayTarget;

    extern Abc_Ntk_t * Abc_NtkFpga( Abc_Ntk_t * pNtk, float DelayTarget, int fRecovery, int fSwitching, int fLatchPaths, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fRecovery   = 1;
    fSwitching  = 0;
    fLatchPaths = 0;
    fVerbose    = 0;
    DelayTarget =-1;
    nLutSize    =-1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "aplvhDK" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fRecovery ^= 1;
            break;
        case 'p':
            fSwitching ^= 1;
            break;
        case 'l':
            fLatchPaths ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            DelayTarget = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    // create the new LUT library
    if ( nLutSize >= 3 && nLutSize <= 10 )
        Fpga_SetSimpleLutLib( nLutSize );
/*
    else
    {
        Abc_Print( -1, "Cannot perform FPGA mapping with LUT size %d.\n", nLutSize );
        return 1;
    }
*/
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        // strash and balance the network
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Strashing before FPGA mapping has failed.\n" );
            return 1;
        }
        pNtk = Abc_NtkBalance( pNtkRes = pNtk, 0, 0, 1 );
        Abc_NtkDelete( pNtkRes );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Balancing before FPGA mapping has failed.\n" );
            return 1;
        }
        Abc_Print( 1, "The network was strashed and balanced before FPGA mapping.\n" );
        // get the new network
        pNtkRes = Abc_NtkFpga( pNtk, DelayTarget, fRecovery, fSwitching, fLatchPaths, fVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_NtkDelete( pNtk );
            Abc_Print( -1, "FPGA mapping has failed.\n" );
            return 1;
        }
        Abc_NtkDelete( pNtk );
    }
    else
    {
        // get the new network
        pNtkRes = Abc_NtkFpga( pNtk, DelayTarget, fRecovery, fSwitching, fLatchPaths, fVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "FPGA mapping has failed.\n" );
            return 1;
        }
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    if ( DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%.2f", DelayTarget );
    if ( nLutSize == -1 )
        sprintf(LutSize, "library" );
    else
        sprintf(LutSize, "%d", nLutSize );
    Abc_Print( -2, "usage: fpga [-D float] [-K num] [-aplvh]\n" );
    Abc_Print( -2, "\t           performs FPGA mapping of the current network\n" );
    Abc_Print( -2, "\t-a       : toggles area recovery [default = %s]\n", fRecovery? "yes": "no" );
    Abc_Print( -2, "\t-p       : optimizes power by minimizing switching activity [default = %s]\n", fSwitching? "yes": "no" );
    Abc_Print( -2, "\t-l       : optimizes latch paths for delay, other paths for area [default = %s]\n", fLatchPaths? "yes": "no" );
    Abc_Print( -2, "\t-D float : sets the required time for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-K num   : the number of LUT inputs (2 < num < 11) [default = %s]%s\n", LutSize, (nLutSize == -1 ? " (type \"print_lut\")" : "") );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFpgaFast( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[100];
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fRecovery;
    int fVerbose;
    int nLutSize;
    float DelayTarget;

    extern Abc_Ntk_t * Abc_NtkFpgaFast( Abc_Ntk_t * pNtk, int nLutSize, int fRecovery, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fRecovery   = 1;
    fVerbose    = 0;
    DelayTarget =-1;
    nLutSize    = 5;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "avhDK" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fRecovery ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            DelayTarget = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        // strash and balance the network
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Strashing before FPGA mapping has failed.\n" );
            return 1;
        }
        pNtk = Abc_NtkBalance( pNtkRes = pNtk, 0, 0, 1 );
        Abc_NtkDelete( pNtkRes );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Balancing before FPGA mapping has failed.\n" );
            return 1;
        }
        Abc_Print( 1, "The network was strashed and balanced before FPGA mapping.\n" );
        // get the new network
        pNtkRes = Abc_NtkFpgaFast( pNtk, nLutSize, fRecovery, fVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_NtkDelete( pNtk );
            Abc_Print( -1, "FPGA mapping has failed.\n" );
            return 1;
        }
        Abc_NtkDelete( pNtk );
    }
    else
    {
        // get the new network
        pNtkRes = Abc_NtkFpgaFast( pNtk, nLutSize, fRecovery, fVerbose );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "FPGA mapping has failed.\n" );
            return 1;
        }
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    if ( DelayTarget == -1 )
        sprintf(Buffer, "not used" );
    else
        sprintf(Buffer, "%.2f", DelayTarget );
    Abc_Print( -2, "usage: ffpga [-K num] [-avh]\n" );
    Abc_Print( -2, "\t           performs fast FPGA mapping of the current network\n" );
    Abc_Print( -2, "\t-a       : toggles area recovery [default = %s]\n", fRecovery? "yes": "no" );
//    Abc_Print( -2, "\t-D float : sets the required time for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-K num   : the number of LUT inputs (2 < num < 32) [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}
#endif

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkIf( Abc_Ntk_t * pNtk, If_Par_t * pPars );
    char Buffer[100], LutSize[100];
    Abc_Ntk_t * pNtk, * pNtkRes;
    If_Par_t Pars, * pPars = &Pars;
    int c;
    pNtk = Abc_FrameReadNtk(pAbc);
    If_ManSetDefaultPars( pPars );
    pPars->pLutLib = (If_LibLut_t *)Abc_FrameReadLibLut();
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCFAGRNTXYDEWSqaflepmrsdbgxyuojiktncvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 0 )
                goto usage;
            // if the LUT size is specified, disable library
            pPars->pLutLib = NULL;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutsMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nFlowIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFlowIters < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nAreaIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAreaIters < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by a positive integer no less than 3.\n" );
                goto usage;
            }
            pPars->nGateSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGateSize < 2 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRelaxRatio < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer no less than 3.\n" );
                goto usage;
            }
            pPars->nNonDecLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNonDecLimit < 2 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by a positive integer 0,1,or 2.\n" );
                goto usage;
            }
            pPars->nStructType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nStructType < 0 || pPars->nStructType > 2 )
                goto usage;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by a positive integer 0,1,or 2.\n" );
                goto usage;
            }
            pPars->nAndDelay = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAndArea < 0 )
                goto usage;
            break;
        case 'Y':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Y\" should be followed by a positive integer 0,1,or 2.\n" );
                goto usage;
            }
            pPars->nAndArea = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAndDelay < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->Epsilon = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->Epsilon < 0.0 || pPars->Epsilon > 1.0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->WireDelay = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->WireDelay < 0.0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by string.\n" );
                goto usage;
            }
            pPars->pLutStruct = argv[globalUtilOptind];
            globalUtilOptind++;
            if ( strlen(pPars->pLutStruct) != 2 && strlen(pPars->pLutStruct) != 3 )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a 2- or 3-char string (e.g. \"44\" or \"555\").\n" );
                goto usage;
            }
            break;
        case 'q':
            pPars->fPreprocess ^= 1;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'r':
            pPars->fExpRed ^= 1;
            break;
        case 'f':
            pPars->fFancy ^= 1;
            break;
        case 'l':
            pPars->fLatchPaths ^= 1;
            break;
        case 'e':
            pPars->fEdge ^= 1;
            break;
        case 'p':
            pPars->fPower ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 's':
            pPars->fDelayOptLut ^= 1;
            break;
        case 'd':
            pPars->fBidec ^= 1;
            break;
        case 'b':
            pPars->fUseBat ^= 1;
            break;
        case 'g':
            pPars->fDelayOpt ^= 1;
            break;
        case 'x':
            pPars->fDsdBalance ^= 1;
            break;
        case 'y':
            pPars->fUserRecLib ^= 1;
            break;
        case 'u':
            pPars->fUserSesLib ^= 1;
            break;
        case 'o':
            pPars->fUseBuffs ^= 1;
            break;
        case 'j':
            pPars->fEnableCheck07 ^= 1;
            break;
        case 'i':
            pPars->fUseCofVars ^= 1;
            break;
        case 'k':
            pPars->fUseDsdTune ^= 1;
            break;
        case 't':
            pPars->fDoAverage ^= 1;
            break;
        case 'n':
            pPars->fUseDsd ^= 1;
            break;
        case 'c':
            pPars->fUseTtPerm ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( pPars->nLutSize == -1 )
    {
        if ( pPars->pLutLib == NULL )
        {
            Abc_Print( -1, "The LUT library is not given.\n" );
            return 1;
        }
        pPars->nLutSize = pPars->pLutLib->LutMax;
    }

    if ( pPars->nLutSize < 2 || pPars->nLutSize > IF_MAX_LUTSIZE )
    {
        Abc_Print( -1, "Incorrect LUT size (%d).\n", pPars->nLutSize );
        return 1;
    }

    if ( pPars->nCutsMax < 1 || pPars->nCutsMax >= (1<<12) )
    {
        Abc_Print( -1, "Incorrect number of cuts.\n" );
        return 1;
    }

    // enable truth table computation if choices are selected
    if ( (c = Abc_NtkGetChoiceNum( pNtk )) )
    {
//        if ( !Abc_FrameReadFlag("silentmode") )
//            Abc_Print( 0, "Performing LUT mapping with %d choices.\n", c );
        pPars->fExpRed = 0;
    }

    if ( pPars->fUseBat )
    {
        if ( pPars->nLutSize < 4 || pPars->nLutSize > 6 )
        {
            Abc_Print( -1, "This feature only works for {4,5,6}-LUTs.\n" );
            return 1;
        }
        pPars->fCutMin = 1;
    }

    if ( pPars->fEnableCheck07 + pPars->fUseCofVars + pPars->fUseDsdTune + (pPars->pLutStruct != NULL) > 1 )
    {
        Abc_Print( -1, "Only one additional check can be performed at the same time.\n" );
        return 1;
    }
    if ( pPars->fEnableCheck07 )
    {
        if ( pPars->nLutSize < 6 || pPars->nLutSize > 7 )
        {
            Abc_Print( -1, "This feature only works for {6,7}-LUTs.\n" );
            return 1;
        }
        pPars->pFuncCell = If_CutPerformCheck07;
        pPars->fCutMin = 1;
    }
    if ( pPars->fUseCofVars )
    {
        if ( !(pPars->nLutSize & 1) )
        {
            Abc_Print( -1, "This feature only works for odd-sized LUTs.\n" );
            return 1;
        }
        pPars->fCutMin = 1;
    }
    if ( pPars->fUseDsdTune )
    {
        If_DsdMan_t * pDsdMan = (If_DsdMan_t *)Abc_FrameReadManDsd();
        if ( pDsdMan == NULL )
        {
            Abc_Print( -1, "DSD manager is not available.\n" );
            return 1;
        }
        if ( pPars->nLutSize > If_DsdManVarNum(pDsdMan) )
        {
            Abc_Print( -1, "LUT size (%d) is more than the number of variables in the DSD manager (%d).\n", pPars->nLutSize, If_DsdManVarNum(pDsdMan) );
            return 1;
        }
        if ( pPars->fDeriveLuts && If_DsdManGetCellStr(pDsdMan) == NULL )
        {
            Abc_Print( -1, "DSD manager is not matched with any particular cell.\n" );
            return 1;
        }
        pPars->fCutMin = 1;
        pPars->fUseDsd = 1;
        If_DsdManSetNewAsUseless( pDsdMan );
    }
    if ( pPars->pLutStruct )
    {
        if ( pPars->fDsdBalance )
        {
            Abc_Print( -1, "Incompatible options (-S and -x).\n" );
            return 1;
        }
        if ( pPars->nLutSize < 6 || pPars->nLutSize > 16 )
        {
            Abc_Print( -1, "This feature only works for [6;16]-LUTs.\n" );
            return 1;
        }
        pPars->pFuncCell = pPars->fDelayOptLut ? NULL : If_CutPerformCheck16;
        pPars->fCutMin = 1;
    }

    // enable truth table computation if cut minimization is selected
    if ( pPars->fCutMin )
    {
        pPars->fTruth = 1;
        pPars->fExpRed = 0;
    }
    // modify the subgraph recording
    if ( pPars->fUserRecLib || pPars->fUserSesLib )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
        pPars->fUsePerm    =  1;
        pPars->pLutLib     =  NULL;
    }
    // modify for delay optimization
    if ( pPars->fDelayOpt || pPars->fDsdBalance || pPars->fDelayOptLut )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
        pPars->fUseDsd     =  pPars->fDsdBalance || pPars->fDelayOptLut;
        pPars->pLutLib     =  NULL;
    }
    // modify for delay optimization
    if ( pPars->nGateSize > 0 )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
        pPars->fUsePerm    =  1;
        pPars->pLutLib     =  NULL;
        pPars->nLutSize    =  pPars->nGateSize;
    }

    if ( pPars->fUseDsd || pPars->fUseTtPerm )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
    }

    if ( pPars->fUseDsd )
    {
        int LutSize = (pPars->pLutStruct && pPars->pLutStruct[2] == 0)? pPars->pLutStruct[0] - '0' : 0;
        If_DsdMan_t * p = (If_DsdMan_t *)Abc_FrameReadManDsd();
        if ( pPars->pLutStruct && pPars->pLutStruct[2] != 0 )
        {
            printf( "DSD only works for LUT structures XY.\n" );
            return 0;
        }
        if ( p && pPars->nLutSize > If_DsdManVarNum(p) )
        {
            printf( "DSD manager has incompatible number of variables.\n" );
            return 0;
        }
        if ( p && LutSize != If_DsdManLutSize(p) && !pPars->fDsdBalance )
        {
            printf( "DSD manager has different LUT size.\n" );
            return 0;
        }
        if ( p == NULL )
        {
            if ( LutSize > DAU_MAX_VAR || pPars->nLutSize > DAU_MAX_VAR )
            {
                printf( "Size of required DSD manager (%d) exceeds the precompiled limit (%d) (change parameter DAU_MAX_VAR).\n", LutSize, DAU_MAX_VAR );
                return 0;
            }
            Abc_FrameSetManDsd( If_DsdManAlloc(pPars->nLutSize, LutSize) );
        }
    }

    if ( pPars->fUserRecLib )
    {
        if ( !Abc_NtkRecIsRunning3() )
        {
            printf( "LMS manager is not running (use \"rec_start3\").\n" );
            return 0;
        }
        if ( Abc_NtkRecInputNum3() != pPars->nLutSize )
        {
            printf( "The number of library inputs (%d) is different from the K parameters (%d).\n", Abc_NtkRecInputNum3(), pPars->nLutSize );
            return 0;
        }
    }

    if ( pPars->fUserSesLib )
    {
        if ( !Abc_ExactIsRunning() )
        {
            printf( "BMS manager is not running (use \"bms_start\").\n" );
            return 0;
        }
        if ( Abc_ExactInputNum() < pPars->nLutSize )
        {
            printf( "The number of library inputs (%d) is smaller than the K parameters (%d).\n", Abc_ExactInputNum(), pPars->nLutSize );
            return 0;
        }
    }

    // complain if truth tables are requested but the cut size is too large
    if ( pPars->fTruth && pPars->nLutSize > IF_MAX_FUNC_LUTSIZE )
    {
        Abc_Print( -1, "Truth tables cannot be computed for LUT larger than %d inputs.\n", IF_MAX_FUNC_LUTSIZE );
        return 1;
    }

    // disable cut-expansion if edge-based heuristics are selected
//    if ( pPars->fEdge )
//        pPars->fExpRed = 0;

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        // strash and balance the network
        pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Strashing before FPGA mapping has failed.\n" );
            return 1;
        }
        pNtk = Abc_NtkBalance( pNtkRes = pNtk, 0, 0, 1 );
        Abc_NtkDelete( pNtkRes );
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Balancing before FPGA mapping has failed.\n" );
            return 1;
        }
        if ( !Abc_FrameReadFlag("silentmode") )
            Abc_Print( 1, "The network was strashed and balanced before FPGA mapping.\n" );
        // get the new network
        pNtkRes = Abc_NtkIf( pNtk, pPars );
        if ( pNtkRes == NULL )
        {
            Abc_NtkDelete( pNtk );
            Abc_Print( -1, "FPGA mapping has failed.\n" );
            return 0;
        }
        Abc_NtkDelete( pNtk );
    }
    else
    {
        // get the new network
        pNtkRes = Abc_NtkIf( pNtk, pPars );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "FPGA mapping has failed.\n" );
            return 0;
        }
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%.2f", pPars->DelayTarget );
    if ( pPars->nLutSize == -1 )
        sprintf(LutSize, "library" );
    else
        sprintf(LutSize, "%d", pPars->nLutSize );
    Abc_Print( -2, "usage: if [-KCFAGRNTXY num] [-DEW float] [-S str] [-qarlepmsdbgxyuojiktncvh]\n" );
    Abc_Print( -2, "\t           performs FPGA technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : the number of LUT inputs (2 < num < %d) [default = %s]\n", IF_MAX_LUTSIZE+1, LutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (0 < num < 2^12) [default = %d]\n", pPars->nCutsMax );
    Abc_Print( -2, "\t-F num   : the number of area flow recovery iterations (num >= 0) [default = %d]\n", pPars->nFlowIters );
    Abc_Print( -2, "\t-A num   : the number of exact area recovery iterations (num >= 0) [default = %d]\n", pPars->nAreaIters );
    Abc_Print( -2, "\t-G num   : the max AND/OR gate size for mapping (0 = unused) [default = %d]\n", pPars->nGateSize );
    Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n", pPars->nRelaxRatio );
    Abc_Print( -2, "\t-N num   : the max size of non-decomposable nodes [default = unused]\n", pPars->nNonDecLimit );
    Abc_Print( -2, "\t-T num   : the type of LUT structures [default = any]\n" );
    Abc_Print( -2, "\t-X num   : delay of AND-gate in LUT library units [default = %d]\n", pPars->nAndDelay );
    Abc_Print( -2, "\t-Y num   : area of AND-gate in LUT library units [default = %d]\n", pPars->nAndArea );
    Abc_Print( -2, "\t-D float : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-E float : sets epsilon used for tie-breaking [default = %f]\n", pPars->Epsilon );
    Abc_Print( -2, "\t-W float : sets wire delay between adjects LUTs [default = %f]\n", pPars->WireDelay );
    Abc_Print( -2, "\t-S str   : string representing the LUT structure [default = %s]\n", pPars->pLutStruct ? pPars->pLutStruct : "not used" );
    Abc_Print( -2, "\t-q       : toggles preprocessing using several starting points [default = %s]\n", pPars->fPreprocess? "yes": "no" );
    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fArea? "yes": "no" );
    Abc_Print( -2, "\t-r       : enables expansion/reduction of the best cuts [default = %s]\n", pPars->fExpRed? "yes": "no" );
    Abc_Print( -2, "\t-l       : optimizes latch paths for delay, other paths for area [default = %s]\n", pPars->fLatchPaths? "yes": "no" );
    Abc_Print( -2, "\t-e       : uses edge-based cut selection heuristics [default = %s]\n", pPars->fEdge? "yes": "no" );
    Abc_Print( -2, "\t-p       : uses power-aware cut selection heuristics [default = %s]\n", pPars->fPower? "yes": "no" );
    Abc_Print( -2, "\t-m       : enables cut minimization by removing vacuous variables [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles delay-oriented mapping used with -S <NN> [default = %s]\n", pPars->fDelayOptLut? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggles deriving local AIGs using bi-decomposition [default = %s]\n", pPars->fBidec? "yes": "no" );
    Abc_Print( -2, "\t-b       : toggles the use of one special feature [default = %s]\n", pPars->fUseBat? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles delay optimization by SOP balancing [default = %s]\n", pPars->fDelayOpt? "yes": "no" );
    Abc_Print( -2, "\t-x       : toggles delay optimization by DSD balancing [default = %s]\n", pPars->fDsdBalance? "yes": "no" );
    Abc_Print( -2, "\t-y       : toggles delay optimization with recorded library [default = %s]\n", pPars->fUserRecLib? "yes": "no" );
    Abc_Print( -2, "\t-u       : toggles delay optimization with SAT-based library [default = %s]\n", pPars->fUserSesLib? "yes": "no" );
    Abc_Print( -2, "\t-o       : toggles using buffers to decouple combinational outputs [default = %s]\n", pPars->fUseBuffs? "yes": "no" );
    Abc_Print( -2, "\t-j       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck07? "yes": "no" );
    Abc_Print( -2, "\t-i       : toggles using cofactoring variables [default = %s]\n", pPars->fUseCofVars? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles matching based on precomputed DSD manager [default = %s]\n", pPars->fUseDsdTune? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggles optimizing average rather than maximum level [default = %s]\n", pPars->fDoAverage? "yes": "no" );
    Abc_Print( -2, "\t-n       : toggles computing DSDs of the cut functions [default = %s]\n", pPars->fUseDsd? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggles computing truth tables in a new way [default = %s]\n", pPars->fUseTtPerm? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIfif( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkPerformIfif( Abc_Ntk_t * pNtk, Ifif_Par_t * pPars );
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Ifif_Par_t Pars, * pPars = &Pars;
    int c, fError;

    pPars->nLutSize     =  -1;    // the LUT size
    pPars->pLutLib      = (If_LibLut_t *)Abc_FrameReadLibLut();       // the LUT library
    pPars->DelayWire    = (float)0.5;    // wire delay
    pPars->nDegree      =   0;    // structure degree
    pPars->fCascade     =   0;    // cascade
    pPars->fVerbose     =   0;    // verbose
    pPars->fVeryVerbose =   0;    // verbose

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "DNcvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayWire = atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayWire < 0.0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->nDegree = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDegree < 0 )
                goto usage;
            break;
        case 'c':
            pPars->fCascade ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "Need mapped network.\n" );
        return 1;
    }
    if ( pPars->pLutLib == NULL )
    {
        Abc_Print( -1, "LUT library is not given.\n" );
        return 1;
    }

    pPars->nLutSize = Abc_NtkGetFaninMax( pNtk );
    if ( pPars->nLutSize > pPars->pLutLib->LutMax )
    {
        Abc_Print( -1, "The max node size (%d) exceeds the LUT size (%d).\n", pPars->nLutSize, pPars->pLutLib->LutMax );
        return 1;
    }
    if ( pPars->nLutSize < pPars->pLutLib->LutMax )
        Abc_Print( 0, "Node size (%d) is less than LUT size (%d).\n", pPars->nLutSize, pPars->pLutLib->LutMax );
    // check delay information
    fError = 0;
    for ( c = 0; c < pPars->pLutLib->LutMax; c++ )
    {
        pPars->pLutDelays[c] = ( pPars->pLutLib->fVarPinDelays ? pPars->pLutLib->pLutDelays[pPars->pLutLib->LutMax][c] : pPars->pLutLib->pLutDelays[pPars->pLutLib->LutMax][0] );
        if ( pPars->DelayWire >= pPars->pLutDelays[c] )
        {
            fError = 1;
            printf(" Wire delay (%.2f) exceeds pin+wire delay (%.2f) for pin %d in the LUT library.\n", pPars->DelayWire, pPars->pLutDelays[c], c );
        }
    }
    if ( fError )
        return 1;

    // call the mapper
    Abc_NtkPerformIfif( pNtk, pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: ifif [-DNcvwh]\n" );
    Abc_Print( -2, "\t           technology mapper into N-node K-LUT structures\n" );
    Abc_Print( -2, "\t           (takes a LUT network and maps it into a delay-optimal network\n" );
    Abc_Print( -2, "\t            of N-node K-LUT structures using the current LUT library)\n" );
    Abc_Print( -2, "\t-D float : wire delay (should be less than the LUT delay) [default = %.2f]\n", pPars->DelayWire );
    Abc_Print( -2, "\t-N num   : degree of the LUT structure [default = %d]\n", pPars->nDegree );
    Abc_Print( -2, "\t-c       : toggles using LUT cascade vs LUT cluster [default = %s]\n", pPars->fCascade? "cascade": "cluster" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDsdSave( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * FileName;
    char ** pArgvNew;
    int nArgcNew;
    int c, fSecond = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fSecond ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    // get the input file name
    FileName = (nArgcNew == 1) ? pArgvNew[0] : NULL;
    if ( fSecond )
    {
        if ( !Abc_FrameReadManDsd2() )
        {
            Abc_Print( -1, "The DSD manager is not started.\n" );
            return 1;
        }
        If_DsdManSave( (If_DsdMan_t *)Abc_FrameReadManDsd2(), FileName );
    }
    else
    {
        if ( !Abc_FrameReadManDsd() )
        {
            Abc_Print( -1, "The DSD manager is not started.\n" );
            return 1;
        }
        If_DsdManSave( (If_DsdMan_t *)Abc_FrameReadManDsd(), FileName );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dsd_save [-bh] <file>\n" );
    Abc_Print( -2, "\t         saves DSD manager into a file\n");
    Abc_Print( -2, "\t-b     : toggles processing second manager [default = %s]\n", fSecond? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : (optional) file name to write\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDsdLoad( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * FileName, * pTemp;
    char ** pArgvNew;
    int c, nArgcNew, fSecond = 0;
    FILE * pFile;
    If_DsdMan_t * pDsdMan;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fSecond ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );
    if ( fSecond )
    {
        Abc_FrameSetManDsd2( NULL );
        pDsdMan = If_DsdManLoad(FileName);
        if ( pDsdMan == NULL )
            return 1;
        Abc_FrameSetManDsd2( pDsdMan );
    }
    else
    {
        Abc_FrameSetManDsd( NULL );
        pDsdMan = If_DsdManLoad(FileName);
        if ( pDsdMan == NULL )
            return 1;
        Abc_FrameSetManDsd( pDsdMan );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dsd_load [-bh] <file>\n" );
    Abc_Print( -2, "\t         loads DSD manager from file\n");
    Abc_Print( -2, "\t-b     : toggles processing second manager [default = %s]\n", fSecond? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file name to read\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDsdFree( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fSecond = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fSecond ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( fSecond )
    {
        if ( !Abc_FrameReadManDsd2() )
        {
            Abc_Print( -1, "The DSD manager is not started.\n" );
            return 0;
        }
        Abc_FrameSetManDsd2( NULL );
    }
    else
    {
        if ( !Abc_FrameReadManDsd() )
        {
            Abc_Print( -1, "The DSD manager is not started.\n" );
            return 0;
        }
        Abc_FrameSetManDsd( NULL );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dsd_free [-bh]\n" );
    Abc_Print( -2, "\t         deletes DSD manager\n" );
    Abc_Print( -2, "\t-b     : toggles processing second manager [default = %s]\n", fSecond? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDsdPs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, Number = 0, Support = 0, fOccurs = 0, fTtDump = 0, fSecond = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NSotbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a floating point number.\n" );
                goto usage;
            }
            Number = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Number < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a floating point number.\n" );
                goto usage;
            }
            Support = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Support < 0 )
                goto usage;
            break;
        case 'o':
            fOccurs ^= 1;
            break;
        case 't':
            fTtDump ^= 1;
            break;
        case 'b':
            fSecond ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( fSecond )
    {
        if ( !Abc_FrameReadManDsd2() )
        {
            Abc_Print( -1, "The DSD manager is not started.\n" );
            return 0;
        }
        If_DsdManPrint( (If_DsdMan_t *)Abc_FrameReadManDsd2(), NULL, Number, Support, fOccurs, fTtDump, fVerbose );
    }
    else
    {
        if ( !Abc_FrameReadManDsd() )
        {
            Abc_Print( -1, "The DSD manager is not started.\n" );
            return 0;
        }
        If_DsdManPrint( (If_DsdMan_t *)Abc_FrameReadManDsd(), NULL, Number, Support, fOccurs, fTtDump, fVerbose );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dsd_ps [-NS num] [-obvh]\n" );
    Abc_Print( -2, "\t         prints statistics of the DSD manager\n" );
    Abc_Print( -2, "\t-N num : show structures whose ID divides by N [default = %d]\n",   Number );
    Abc_Print( -2, "\t-S num : show structures whose support size is S [default = %d]\n", Support );
    Abc_Print( -2, "\t-o     : toggles printing occurence distribution [default = %s]\n", fOccurs? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggles dumping truth tables [default = %s]\n",            fTtDump? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggles processing second manager [default = %s]\n",       fSecond? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n",                  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDsdMatch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * pStruct = NULL;
    int c, fVerbose = 0, fFast = 0, fAdd = 0, fSpec = 0, LutSize = 0, nConfls = 10000, nProcs = 1, nInputs = 0;
    If_DsdMan_t * pDsdMan = (If_DsdMan_t *)Abc_FrameReadManDsd();
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCPISfasvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a floating point number.\n" );
                goto usage;
            }
            LutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( LutSize < 4 || LutSize > 6 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a floating point number.\n" );
                goto usage;
            }
            nConfls = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by a floating point number.\n" );
                goto usage;
            }
            nProcs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a floating point number.\n" );
                goto usage;
            }
            nInputs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by string.\n" );
                goto usage;
            }
            pStruct = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'f':
            fFast ^= 1;
            break;
        case 'a':
            fAdd ^= 1;
            break;
        case 's':
            fSpec ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_FrameReadManDsd() )
    {
        Abc_Print( -1, "The DSD manager is not started.\n" );
        return 0;
    }
    if ( pStruct )
    {
        char * pStructCur = If_DsdManGetCellStr( pDsdMan );
        if ( pStructCur && strcmp(pStructCur, pStruct) )
        {
            Abc_Print( -1, "DSD manager matched with cell %s should be cleaned by \"dsd_filter -m\" before matching with cell %s.\n", pStructCur, pStruct );
            return 0;
        }
        Id_DsdManTuneStr( pDsdMan, pStruct, nConfls, nProcs, nInputs, fVerbose );
    }
    else
        If_DsdManTune( pDsdMan, LutSize, fFast, fAdd, fSpec, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: dsd_match [-KCPI num] [-fasvh] [-S str]\n" );
    Abc_Print( -2, "\t         matches DSD structures with the given cell\n" );
    Abc_Print( -2, "\t-K num : LUT size used for tuning [default = %d]\n",        LutSize );
    Abc_Print( -2, "\t-C num : the maximum number of conflicts [default = %d]\n", nConfls );
    Abc_Print( -2, "\t-P num : the maximum number of processes [default = %d]\n", nProcs );
    Abc_Print( -2, "\t-I num : skip checking if support is less than this [default = %d]\n", nInputs );
    Abc_Print( -2, "\t-f     : toggles using fast check [default = %s]\n",        fFast? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggles adding tuning to the current one [default = %s]\n",    fAdd? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggles using specialized check [default = %s]\n", fSpec? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n",          fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-S str : string representing programmable cell [default = %s]\n", pStruct ? pStruct : "not used" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDsdMerge( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * FileName, * pTemp;
    char ** pArgvNew;
    int c, nArgcNew;
    FILE * pFile;
    If_DsdMan_t * pDsdMan;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( !Abc_FrameReadManDsd() )
    {
        Abc_Print( -1, "The DSD manager is not started.\n" );
        return 0;
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );
    pDsdMan = If_DsdManLoad(FileName);
    if ( pDsdMan == NULL )
        return 1;
    If_DsdManMerge( (If_DsdMan_t *)Abc_FrameReadManDsd(), pDsdMan );
    If_DsdManFree( pDsdMan, 0 );
    return 0;

usage:
    Abc_Print( -2, "usage: dsd_merge [-h] <file>\n" );
    Abc_Print( -2, "\t         merges DSD manager from file with the current one\n");
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file name to read\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDsdFilter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    If_DsdMan_t * pDsd = (If_DsdMan_t *)Abc_FrameReadManDsd();
    int c, nLimit = 0, nLutSize = -1, fCleanOccur = 0, fCleanMarks = 0, fInvMarks = 0, fUnate = 0, fThresh = 0, fThreshHeuristic = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "LKomiutsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a floating point number.\n" );
                goto usage;
            }
            nLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a floating point number.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'o':
            fCleanOccur ^= 1;
            break;
        case 'm':
            fCleanMarks ^= 1;
            break;
        case 'i':
            fInvMarks ^= 1;
            break;
        case 'u':
            fUnate ^= 1;
            break;
        case 't':
            fThresh ^= 1;
            break;
        case 's':
            fThreshHeuristic ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pDsd == NULL )
    {
        Abc_Print( -1, "The DSD manager is not started.\n" );
        return 0;
    }
    if ( nLimit > 0 )
        Abc_FrameSetManDsd( If_DsdManFilter(pDsd, nLimit) );
    if ( nLutSize >= 0 )
        If_DsdManSetLutSize( pDsd, nLutSize );
    if ( fCleanOccur )
        If_DsdManCleanOccur( pDsd, fVerbose );
    if ( fCleanMarks )
        If_DsdManCleanMarks( pDsd, fVerbose );
    if ( fInvMarks )
        If_DsdManInvertMarks( pDsd, fVerbose );
#ifdef ABC_USE_CUDD
    else if ( nLimit == 0 )
        Id_DsdManTuneThresh( pDsd, fUnate, fThresh, fThreshHeuristic, fVerbose );
#endif
    return 0;

usage:
    Abc_Print( -2, "usage: dsd_filter [-LK num] [-omiutsvh]\n" );
    Abc_Print( -2, "\t         filtering structured and modifying parameters of DSD manager\n" );
    Abc_Print( -2, "\t-L num : remove structures with fewer occurrences that this [default = %d]\n", nLimit );
    Abc_Print( -2, "\t-K num : new LUT size to set for the DSD manager [default = %d]\n",           nLutSize );
    Abc_Print( -2, "\t-o     : toggles cleaning occurrence counters [default = %s]\n",              fCleanOccur? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggles cleaning matching marks [default = %s]\n",                   fCleanMarks? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggles inverting matching marks [default = %s]\n",                  fInvMarks? "yes": "no" );
    Abc_Print( -2, "\t-u     : toggles marking unate functions [default = %s]\n",                   fUnate? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggles marking threshold functions [default = %s]\n",               fThresh? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggles marking threshold functions heuristically [default = %s]\n", fThreshHeuristic?"yes":"no");
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n",                            fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t        \n" );
    Abc_Print( -2, "\t         Option \"dsd_filter -s\" was contributed by Augusto Neutzling and Jody Matos from\n" );
    Abc_Print( -2, "\t         Federal University of Rio Grande do Sul, Brazil. The paper describing the method:\n" );
    Abc_Print( -2, "\t         A. Neutzling, J. M. Matos, A. Mishchenko, R. Ribas, and A. Reis,\n" );
    Abc_Print( -2, "\t         \"Threshold logic synthesis based on cut pruning\". Proc. ICCAD 2015.\n" );
//    Abc_Print( -2, "\t        http://www.eecs.berkeley.edu/~alanmi/publications/2015/iccad15_thresh.pdf\n" );
    return 1;
}



/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandInit( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Abc_Obj_t * pObj;
    char * pInitStr = NULL;
    int fZeros    = 0;
    int fOnes     = 0;
    int fRandom   = 0;
    int fDontCare = 0;
    int fUseCexCs = 0;
    int fUseCexNs = 0;
    int c, i;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Szordcnh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a file name.\n" );
                goto usage;
            }
            pInitStr = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'z':
            fZeros ^= 1;
            break;
        case 'o':
            fOnes ^= 1;
            break;
        case 'r':
            fRandom ^= 1;
            break;
        case 'd':
            fDontCare ^= 1;
            break;
        case 'c':
            fUseCexCs ^= 1;
            break;
        case 'n':
            fUseCexNs ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( 0, "The current network is combinational.\n" );
        return 0;
    }

    if ( pInitStr != NULL )
    {
        if ( (int)strlen(pInitStr) != Abc_NtkLatchNum(pNtk) )
        {
            Abc_Print( -1, "The length of init string (%d) differs from the number of flops (%d).\n", strlen(pInitStr), Abc_NtkLatchNum(pNtk) );
            return 1;
        }
        Abc_NtkForEachLatch( pNtk, pObj, i )
            if ( pInitStr[i] == '0' )
                Abc_LatchSetInit0( pObj );
            else if ( pInitStr[i] == '1' )
                Abc_LatchSetInit1( pObj );
            else
                Abc_LatchSetInitDc( pObj );
        return 0;
    }

    if ( fZeros )
    {
        Abc_NtkForEachLatch( pNtk, pObj, i )
            Abc_LatchSetInit0( pObj );
    }
    else if ( fOnes )
    {
        Abc_NtkForEachLatch( pNtk, pObj, i )
            Abc_LatchSetInit1( pObj );
    }
    else if ( fRandom )
    {
        srand( time(NULL) );
        Abc_NtkForEachLatch( pNtk, pObj, i )
            if ( rand() & 1 )
                Abc_LatchSetInit1( pObj );
            else
                Abc_LatchSetInit0( pObj );
    }
    else if ( fDontCare )
    {
        Abc_NtkForEachLatch( pNtk, pObj, i )
            Abc_LatchSetInitDc( pObj );
    }
    else if ( fUseCexCs || fUseCexNs )
    {
        extern Vec_Int_t * Saig_ManReturnFailingState( Aig_Man_t * pMan, Abc_Cex_t * p, int fNextOne );
        Aig_Man_t * pMan;
        Vec_Int_t * vFailState;
        if ( fUseCexCs && fUseCexNs )
        {
            Abc_Print( -1, "The two options (-c and -n) are incompatible.\n" );
            return 0;
        }
        if ( !Abc_NtkIsStrash(pNtk) )
        {
            Abc_Print( -1, "The current network should be an AIG.\n" );
            return 0;
        }
        if ( pAbc->pCex == NULL )
        {
            Abc_Print( -1, "The current CEX is not available.\n" );
            return 0;
        }
        pMan = Abc_NtkToDar( pNtk, 0, 1 );
        vFailState = Saig_ManReturnFailingState( pMan, pAbc->pCex, fUseCexNs );
        //Vec_IntPrint( vFailState );
        Aig_ManStop( pMan );
        Abc_NtkForEachLatch( pNtk, pObj, i )
            if ( Vec_IntEntry( vFailState, i ) )
                Abc_LatchSetInit1( pObj );
            else
                Abc_LatchSetInit0( pObj );
        Vec_IntFree( vFailState );
    }
    else
        Abc_Print( -1, "The initial states remain unchanged.\n" );
    return 0;

usage:
    Abc_Print( -2, "usage: init [-zordcnh] [-S <init_string>]\n" );
    Abc_Print( -2, "\t         resets initial states of all latches\n" );
    Abc_Print( -2, "\t-z     : set zeros initial states [default = %s]\n", fZeros? "yes": "no" );
    Abc_Print( -2, "\t-o     : set ones initial states [default = %s]\n", fOnes? "yes": "no" );
    Abc_Print( -2, "\t-d     : set don't-care initial states [default = %s]\n", fDontCare? "yes": "no" );
    Abc_Print( -2, "\t-r     : set random initial states [default = %s]\n", fRandom? "yes": "no" );
    Abc_Print( -2, "\t-c     : set failure current state from the CEX (and run \"zero\") [default = %s]\n", fUseCexCs? "yes": "no" );
    Abc_Print( -2, "\t-n     : set next state after failure from the CEX (and run \"zero\") [default = %s]\n", fUseCexNs? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t-S str : (optional) initial state  [default = unused]\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandZero( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( 0, "The current network is combinational.\n" );
        return 0;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for AIGs.\n" );
        return 0;
    }

    // get the new network
    pNtkRes = Abc_NtkRestrashZero( pNtk, 0 );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Converting to sequential AIG has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: zero [-h]\n" );
    Abc_Print( -2, "\t        converts latches to have const-0 initial value\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandUndc( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c, fUseCex = 0;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ch" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fUseCex ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fUseCex )
    {
        char * pInit;
        Abc_Cex_t * pTemp;
        int k, nFlopsX = 0;
        if ( pAbc->pCex == NULL )
        {
            Abc_Print( -1, "Current CEX is not available.\n" );
            return 1;
        }
        pInit = Abc_NtkCollectLatchValuesStr( pAbc->pNtkCur );
        // count the number of X-valued flops
        for ( k = 0; k < Abc_NtkLatchNum(pAbc->pNtkCur); k++ )
            nFlopsX += (int)(pInit[k] == 'x');
        // compare this value
        if ( Abc_NtkPiNum(pNtk) + nFlopsX != pAbc->pCex->nPis )
        {
            Abc_Print( -1, "The number of PIs (%d) plus X-valued flops (%d) in the original network does not match the number of PIs in the current CEX (%d).\n",
                Abc_NtkPiNum(pNtk), Abc_NtkLatchNum(pNtk), pAbc->pCex->nPis );
            return 1;
        }
        pAbc->pCex = Abc_CexTransformUndc( pTemp = pAbc->pCex, pInit );
        assert( pAbc->pCex->nPis == Abc_NtkPiNum(pAbc->pNtkCur) );
        assert( pAbc->pCex->nRegs == Abc_NtkLatchNum(pAbc->pNtkCur) );
        Abc_CexFree( pTemp );
        ABC_FREE( pInit );
        return 0;
    }

    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( 0, "The current network is combinational.\n" );
        return 0;
    }

    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command works only for logic networks.\n" );
        return 0;
    }

    // get the new network
    Abc_NtkConvertDcLatches( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: undc [-ch]\n" );
    Abc_Print( -2, "\t        converts latches with DC init values into free PIs\n" );
    Abc_Print( -2, "\t-c    : toggles transforming CEX after \"logic;undc;st;zero\" [default = %s]\n", fUseCex? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandOneHot( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    extern Abc_Ntk_t * Abc_NtkConvertOnehot( Abc_Ntk_t * pNtk );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( 0, "The current network is combinational.\n" );
        return 0;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command works only for logic networks.\n" );
        return 0;
    }
    // get the new network
    pNtkRes = Abc_NtkConvertOnehot( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Converting to one-hot encoding has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: onehot [-h]\n" );
    Abc_Print( -2, "\t        converts natural encoding into one-hot encoding\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPipe( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nLatches;
    extern void Abc_NtkLatchPipe( Abc_Ntk_t * pNtk, int nLatches );
    // set defaults
    nLatches = 5;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Lh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLatches = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLatches < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( 0, "Abc_CommandPipe(): Expecting a logic network (run command \"logic\").\n" );
        return 0;
    }

    if ( !Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( 0, "Abc_CommandPipe(): Expecting a combinational network.\n" );
        return 0;
    }

    // update the network
    Abc_NtkLatchPipe( pNtk, nLatches );
    return 0;

usage:
    Abc_Print( -2, "usage: pipe [-L num] [-h]\n" );
    Abc_Print( -2, "\t         inserts the given number of latches at each PI for pipelining\n" );
    Abc_Print( -2, "\t-L num : the number of latches to insert [default = %d]\n", nLatches );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSeq( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "The network has no latches.\n" );
        return 0;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Conversion to sequential AIG works only for combinational AIGs (run \"strash\").\n" );
        return 1;
    }

    // get the new network
//    pNtkRes = Abc_NtkAigToSeq( pNtk );
    pNtkRes = NULL;
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Converting to sequential AIG has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: seq [-h]\n" );
    Abc_Print( -2, "\t        converts AIG into sequential AIG\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandUnseq( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fShare;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fShare = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "sh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fShare ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
/*
    if ( !Abc_NtkIsSeq(pNtk) )
    {
        Abc_Print( -1, "Conversion to combinational AIG works only for sequential AIG (run \"seq\").\n" );
        return 1;
    }
*/
    // share the latches on the fanout edges
//    if ( fShare )
//        Seq_NtkShareFanouts(pNtk);

    // get the new network
//    pNtkRes = Abc_NtkSeqToLogicSop( pNtk );
    pNtkRes = NULL;
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Converting sequential AIG into an SOP logic network has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: unseq [-sh]\n" );
    Abc_Print( -2, "\t        converts sequential AIG into an SOP logic network\n" );
    Abc_Print( -2, "\t-s    : toggle sharing latches [default = %s]\n", fShare? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandRetime( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nMaxIters;
    int fForward;
    int fBackward;
    int fOneStep;
    int fUseOldNames;
    int fVerbose;
    int Mode;
    int nDelayLim;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Mode      =  5;
    nDelayLim =  0;
    fForward  =  0;
    fBackward =  0;
    fOneStep  =  0;
    fUseOldNames = 0;
    fVerbose  =  0;
    nMaxIters = 15;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "MDfbsovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by a positive integer.\n" );
                goto usage;
            }
            Mode = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Mode < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nDelayLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDelayLim < 0 )
                goto usage;
            break;
        case 'f':
            fForward ^= 1;
            break;
        case 'b':
            fBackward ^= 1;
            break;
        case 's':
            fOneStep ^= 1;
            break;
        case 'o':
            fUseOldNames ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fForward && fBackward )
    {
        Abc_Print( -1, "Only one switch \"-f\" or \"-b\" can be selected at a time.\n" );
        return 1;
    }

    if ( !Abc_NtkLatchNum(pNtk) )
    {
//        Abc_Print( -1, "The network has no latches. Retiming is not performed.\n" );
        return 0;
    }

    if ( Mode < 0 || Mode > 6 )
    {
        Abc_Print( -1, "The mode (%d) is incorrect. Retiming is not performed.\n", Mode );
        return 0;
    }

    if ( Abc_NtkIsStrash(pNtk) )
    {
        if ( Abc_NtkGetChoiceNum(pNtk) )
        {
            Abc_Print( -1, "Retiming with choice nodes is not implemented.\n" );
            return 0;
        }
        // convert the network into an SOP network
        pNtkRes = Abc_NtkToLogic( pNtk );
        // perform the retiming
        Abc_NtkRetime( pNtkRes, Mode, nDelayLim, fForward, fBackward, fOneStep, fUseOldNames, fVerbose );
        // replace the current network
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        return 0;
    }

    // get the network in the SOP form
    if ( !Abc_NtkToSop(pNtk, -1, ABC_INFINITY) )
    {
        Abc_Print( -1, "Converting to SOPs has failed.\n" );
        return 0;
    }

    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "The network is not a logic network. Retiming is not performed.\n" );
        return 0;
    }

    // perform the retiming
    Abc_NtkRetime( pNtk, Mode, nDelayLim, fForward, fBackward, fOneStep, fUseOldNames, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: retime [-MD num] [-fbsovh]\n" );
    Abc_Print( -2, "\t         retimes the current network using one of the algorithms:\n" );
    Abc_Print( -2, "\t             1: most forward retiming\n" );
    Abc_Print( -2, "\t             2: most backward retiming\n" );
    Abc_Print( -2, "\t             3: forward and backward min-area retiming\n" );
    Abc_Print( -2, "\t             4: forward and backward min-delay retiming\n" );
    Abc_Print( -2, "\t             5: mode 3 followed by mode 4\n" );
    Abc_Print( -2, "\t             6: Pan's optimum-delay retiming using binary search\n" );
    Abc_Print( -2, "\t-M num : the retiming algorithm to use [default = %d]\n", Mode );
    Abc_Print( -2, "\t-D num : the minimum delay target (0=unused) [default = %d]\n", nDelayLim );
    Abc_Print( -2, "\t-f     : enables forward-only retiming in modes 3,4,5 [default = %s]\n", fForward? "yes": "no" );
    Abc_Print( -2, "\t-b     : enables backward-only retiming in modes 3,4,5 [default = %s]\n", fBackward? "yes": "no" );
    Abc_Print( -2, "\t-s     : enables retiming one step only in mode 4 [default = %s]\n", fOneStep? "yes": "no" );
    Abc_Print( -2, "\t-o     : enables usind old flop naming conventions [default = %s]\n", fUseOldNames? "yes": "no" );
    Abc_Print( -2, "\t-v     : enables verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
//    Abc_Print( -2, "\t-I num : max number of iterations of l-value computation [default = %d]\n", nMaxIters );
//    Abc_Print( -2, "\t-f     : toggle forward retiming (for AIGs) [default = %s]\n", fForward? "yes": "no" );
//    Abc_Print( -2, "\t-b     : toggle backward retiming (for AIGs) [default = %s]\n", fBackward? "yes": "no" );
//    Abc_Print( -2, "\t-i     : toggle computation of initial state [default = %s]\n", fInitial? "yes": "no" );
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDRetime( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fMinArea;
    int fForwardOnly;
    int fBackwardOnly;
    int fInitial;
    int nStepsMax;
    int fFastAlgo;
    int fVerbose;
    int c, nMaxIters;
    extern Abc_Ntk_t * Abc_NtkDarRetime( Abc_Ntk_t * pNtk, int nStepsMax, int fVerbose );
    extern Abc_Ntk_t * Abc_NtkDarRetimeF( Abc_Ntk_t * pNtk, int nStepsMax, int fVerbose );
    extern Abc_Ntk_t * Abc_NtkDarRetimeMinArea( Abc_Ntk_t * pNtk, int nMaxIters, int fForwardOnly, int fBackwardOnly, int fInitial, int fVerbose );
    extern Abc_Ntk_t * Abc_NtkDarRetimeMostFwd( Abc_Ntk_t * pNtk, int nMaxIters, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fMinArea  = 1;
    fForwardOnly = 0;
    fBackwardOnly = 0;
    fInitial = 1;
    nStepsMax = 100000;
    fFastAlgo = 0;
    nMaxIters = 20;
    fVerbose  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NSmfbiavh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nMaxIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxIters < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nStepsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nStepsMax < 0 )
                goto usage;
            break;
        case 'm':
            fMinArea ^= 1;
            break;
        case 'f':
            fForwardOnly ^= 1;
            break;
        case 'b':
            fBackwardOnly ^= 1;
            break;
        case 'i':
            fInitial ^= 1;
            break;
        case 'a':
            fFastAlgo ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkLatchNum(pNtk) )
    {
//        Abc_Print( -1, "The network has no latches. Retiming is not performed.\n" );
        return 0;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for structrally hashed networks. Run \"st\".\n" );
        return 0;
    }

    // perform the retiming
    if ( fMinArea )
        pNtkRes = Abc_NtkDarRetimeMinArea( pNtk, nMaxIters, fForwardOnly, fBackwardOnly, fInitial, fVerbose );
    else if ( fFastAlgo )
        pNtkRes = Abc_NtkDarRetime( pNtk, nStepsMax, fVerbose );
    else
//        pNtkRes = Abc_NtkDarRetimeF( pNtk, nStepsMax, fVerbose );
        pNtkRes = Abc_NtkDarRetimeMostFwd( pNtk, nMaxIters, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Retiming has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: dretime [-NS num] [-mfbiavh]\n" );
    Abc_Print( -2, "\t         new implementation of min-area (or most-forward) retiming\n" );
    Abc_Print( -2, "\t-m     : toggle min-area retiming and most-forward retiming [default = %s]\n", fMinArea? "min-area": "most-fwd" );
    Abc_Print( -2, "\t-f     : enables forward-only retiming [default = %s]\n", fForwardOnly? "yes": "no" );
    Abc_Print( -2, "\t-b     : enables backward-only retiming [default = %s]\n", fBackwardOnly? "yes": "no" );
    Abc_Print( -2, "\t-i     : enables init state computation [default = %s]\n", fInitial? "yes": "no" );
    Abc_Print( -2, "\t-N num : the max number of one-frame iterations to perform [default = %d]\n", nMaxIters );
    Abc_Print( -2, "\t-S num : the max number of forward retiming steps to perform [default = %d]\n", nStepsMax );
    Abc_Print( -2, "\t-a     : enables a fast most-forward algorithm [default = %s]\n", fFastAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v     : enables verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFlowRetime( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c, nMaxIters;
    int fForward;
    int fBackward;
    int fVerbose;
    int fComputeInit, fGuaranteeInit, fBlockConst;
    int fFastButConservative;
    int maxDelay;

    extern Abc_Ntk_t* Abc_FlowRetime_MinReg( Abc_Ntk_t * pNtk, int fVerbose,
                                             int fComputeInit, int fGuaranteeInit, int fBlockConst,
                                             int fForward, int fBackward, int nMaxIters,
                                             int maxDelay, int fFastButConservative);

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fForward  =  0;
    fFastButConservative = 0;
    fBackward =  0;
    fComputeInit =  1;
    fGuaranteeInit =  0;
    fVerbose  =  0;
    fBlockConst  =  0;
    nMaxIters = 999;
    maxDelay  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "MDfcgbkivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nMaxIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxIters < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a positive integer.\n" );
                goto usage;
            }
            maxDelay = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( maxDelay < 0 )
                goto usage;
           break;
        case 'f':
            fForward ^= 1;
            break;
        case 'c':
            fFastButConservative ^= 1;
            break;
        case 'i':
            fComputeInit ^= 1;
            break;
        case 'b':
            fBackward ^= 1;
            break;
        case 'g':
            fGuaranteeInit ^= 1;
            break;
        case 'k':
            fBlockConst ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( fForward && fBackward )
    {
        Abc_Print( -1, "Only one switch \"-f\" or \"-b\" can be selected at a time.\n" );
        return 1;
    }

    if ( fGuaranteeInit && !fComputeInit )
    {
      Abc_Print( -1, "Initial state guarantee (-g) requires initial state computation (-i).\n" );
      return 1;
    }

    if ( !Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The network has no latches. Retiming is not performed.\n" );
        return 0;
    }

    if ( Abc_NtkGetChoiceNum(pNtk) )
      {
        Abc_Print( -1, "Retiming with choice nodes is not implemented.\n" );
        return 0;
      }

    // perform the retiming
    pNtkRes = Abc_FlowRetime_MinReg( pNtk, fVerbose, fComputeInit,
                                     fGuaranteeInit, fBlockConst,
                                     fForward, fBackward,
                                     nMaxIters, maxDelay, fFastButConservative );

    if (pNtkRes != pNtk)
      Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );

    return 0;

usage:
    Abc_Print( -2, "usage: fretime [-M num] [-D num] [-fbvih]\n" );
    Abc_Print( -2, "\t         retimes the current network using flow-based algorithm\n" );
    Abc_Print( -2, "\t-M num : the maximum number of iterations [default = %d]\n", nMaxIters );
    Abc_Print( -2, "\t-D num : the maximum delay [default = none]\n" );
    Abc_Print( -2, "\t-i     : enables init state computation [default = %s]\n", fComputeInit? "yes": "no" );
    Abc_Print( -2, "\t-k     : blocks retiming over const nodes [default = %s]\n", fBlockConst? "yes": "no" );
    Abc_Print( -2, "\t-g     : guarantees init state computation [default = %s]\n", fGuaranteeInit? "yes": "no" );
    Abc_Print( -2, "\t-c     : very fast (but conserv.) delay constraints [default = %s]\n", fFastButConservative? "yes": "no" );
    Abc_Print( -2, "\t-f     : enables forward-only retiming  [default = %s]\n", fForward? "yes": "no" );
    Abc_Print( -2, "\t-b     : enables backward-only retiming [default = %s]\n", fBackward? "yes": "no" );
    Abc_Print( -2, "\t-v     : enables verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCRetime( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fVerbose;
    extern Abc_Ntk_t * Abc_NtkCRetime( Abc_Ntk_t * pNtk, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fVerbose    = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for logic networks.\n" );
        return 1;
    }
    if ( !Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    // modify the current network
    pNtkRes = Abc_NtkCRetime( pNtk, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Sequential cleanup has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: cretime [-vh]\n" );
    Abc_Print( -2, "\t         performs most-forward retiming with equiv classes\n" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSeqFpga( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkNew, * pNtkRes;
    int c, nMaxIters;
    int fVerbose;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nMaxIters = 15;
    fVerbose  =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nMaxIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxIters < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkHasAig(pNtk) )
    {
/*
        // quit if there are choice nodes
        if ( Abc_NtkGetChoiceNum(pNtk) )
        {
            Abc_Print( -1, "Currently cannot map/retime networks with choice nodes.\n" );
            return 0;
        }
*/
//        if ( Abc_NtkIsStrash(pNtk) )
//            pNtkNew = Abc_NtkAigToSeq(pNtk);
//        else
//            pNtkNew = Abc_NtkDup(pNtk);
        pNtkNew = NULL;
    }
    else
    {
        // strash and balance the network
        pNtkNew = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtkNew == NULL )
        {
            Abc_Print( -1, "Strashing before FPGA mapping/retiming has failed.\n" );
            return 1;
        }

        pNtkNew = Abc_NtkBalance( pNtkRes = pNtkNew, 0, 0, 1 );
        Abc_NtkDelete( pNtkRes );
        if ( pNtkNew == NULL )
        {
            Abc_Print( -1, "Balancing before FPGA mapping has failed.\n" );
            return 1;
        }

        // convert into a sequential AIG
//        pNtkNew = Abc_NtkAigToSeq( pNtkRes = pNtkNew );
        pNtkNew = NULL;
        Abc_NtkDelete( pNtkRes );
        if ( pNtkNew == NULL )
        {
            Abc_Print( -1, "Converting into a seq AIG before FPGA mapping/retiming has failed.\n" );
            return 1;
        }

        Abc_Print( 1, "The network was strashed and balanced before FPGA mapping/retiming.\n" );
    }

    // get the new network
//    pNtkRes = Seq_NtkFpgaMapRetime( pNtkNew, nMaxIters, fVerbose );
    pNtkRes = NULL;
    if ( pNtkRes == NULL )
    {
//        Abc_Print( -1, "Sequential FPGA mapping has failed.\n" );
        Abc_NtkDelete( pNtkNew );
        return 0;
    }
    Abc_NtkDelete( pNtkNew );
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: sfpga [-I num] [-vh]\n" );
    Abc_Print( -2, "\t         performs integrated sequential FPGA mapping/retiming\n" );
    Abc_Print( -2, "\t-I num : max number of iterations of l-value computation [default = %d]\n", nMaxIters );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSeqMap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkNew, * pNtkRes;
    int c, nMaxIters;
    int fVerbose;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nMaxIters = 15;
    fVerbose  =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nMaxIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxIters < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkHasAig(pNtk) )
    {
/*
        // quit if there are choice nodes
        if ( Abc_NtkGetChoiceNum(pNtk) )
        {
            Abc_Print( -1, "Currently cannot map/retime networks with choice nodes.\n" );
            return 0;
        }
*/
//        if ( Abc_NtkIsStrash(pNtk) )
//            pNtkNew = Abc_NtkAigToSeq(pNtk);
//        else
//            pNtkNew = Abc_NtkDup(pNtk);
        pNtkNew = NULL;
    }
    else
    {
        // strash and balance the network
        pNtkNew = Abc_NtkStrash( pNtk, 0, 0, 0 );
        if ( pNtkNew == NULL )
        {
            Abc_Print( -1, "Strashing before SC mapping/retiming has failed.\n" );
            return 1;
        }

        pNtkNew = Abc_NtkBalance( pNtkRes = pNtkNew, 0, 0, 1 );
        Abc_NtkDelete( pNtkRes );
        if ( pNtkNew == NULL )
        {
            Abc_Print( -1, "Balancing before SC mapping/retiming has failed.\n" );
            return 1;
        }

        // convert into a sequential AIG
//        pNtkNew = Abc_NtkAigToSeq( pNtkRes = pNtkNew );
        pNtkNew = NULL;
        Abc_NtkDelete( pNtkRes );
        if ( pNtkNew == NULL )
        {
            Abc_Print( -1, "Converting into a seq AIG before SC mapping/retiming has failed.\n" );
            return 1;
        }

        Abc_Print( -1, "The network was strashed and balanced before SC mapping/retiming.\n" );
    }

    // get the new network
//    pNtkRes = Seq_MapRetime( pNtkNew, nMaxIters, fVerbose );
    pNtkRes = NULL;
    if ( pNtkRes == NULL )
    {
//        Abc_Print( -1, "Sequential FPGA mapping has failed.\n" );
        Abc_NtkDelete( pNtkNew );
        return 0;
    }
    Abc_NtkDelete( pNtkNew );

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: smap [-I num] [-vh]\n" );
    Abc_Print( -2, "\t         performs integrated sequential standard-cell mapping/retiming\n" );
    Abc_Print( -2, "\t-I num : max number of iterations of l-value computation [default = %d]\n", nMaxIters );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSeqSweep( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Fra_Ssw_t Pars, * pPars = &Pars;
    int c;
    extern Abc_Ntk_t * Abc_NtkDarSeqSweep( Abc_Ntk_t * pNtk, Fra_Ssw_t * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    pPars->nPartSize  = 0;
    pPars->nOverSize  = 0;
    pPars->nFramesP   = 0;
    pPars->nFramesK   = 1;
    pPars->nMaxImps   = 5000;
    pPars->nMaxLevs   = 0;
    pPars->fUseImps   = 0;
    pPars->fRewrite   = 0;
    pPars->fFraiging  = 0;
    pPars->fLatchCorr = 0;
    pPars->fWriteImps = 0;
    pPars->fUse1Hot   = 0;
    pPars->fVerbose   = 0;
    pPars->TimeLimit  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PQNFILirfletvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nPartSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nPartSize < 2 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nOverSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nOverSize < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesP = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesP < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesK = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesK <= 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxImps = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxImps <= 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxLevs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxLevs <= 0 )
                goto usage;
            break;
        case 'i':
            pPars->fUseImps ^= 1;
            break;
        case 'r':
            pPars->fRewrite ^= 1;
            break;
        case 'f':
            pPars->fFraiging ^= 1;
            break;
        case 'l':
            pPars->fLatchCorr ^= 1;
            break;
        case 'e':
            pPars->fWriteImps ^= 1;
            break;
        case 't':
            pPars->fUse1Hot ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( 0, "The network is combinational (run \"fraig\" or \"fraig_sweep\").\n" );
        return 0;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for structrally hashed networks. Run \"st\".\n" );
        return 0;
    }

    if ( pPars->nFramesK > 1 && pPars->fUse1Hot )
    {
        Abc_Print( -1, "Currrently can only use one-hotness for simple induction (K=1).\n" );
        return 0;
    }

    if ( pPars->nFramesP && pPars->fUse1Hot )
    {
        Abc_Print( -1, "Currrently can only use one-hotness without prefix.\n" );
        return 0;
    }

    // get the new network
    pNtkRes = Abc_NtkDarSeqSweep( pNtk, pPars );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Sequential sweeping has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: ssweep [-PQNFL <num>] [-lrfetvh]\n" );
    Abc_Print( -2, "\t         performs sequential sweep using K-step induction\n" );
    Abc_Print( -2, "\t-P num : max partition size (0 = no partitioning) [default = %d]\n", pPars->nPartSize );
    Abc_Print( -2, "\t-Q num : partition overlap (0 = no overlap) [default = %d]\n", pPars->nOverSize );
    Abc_Print( -2, "\t-N num : number of time frames to use as the prefix [default = %d]\n", pPars->nFramesP );
    Abc_Print( -2, "\t-F num : number of time frames for induction (1=simple) [default = %d]\n", pPars->nFramesK );
    Abc_Print( -2, "\t-L num : max number of levels to consider (0=all) [default = %d]\n", pPars->nMaxLevs );
//    Abc_Print( -2, "\t-I num : max number of implications to consider [default = %d]\n", pPars->nMaxImps );
//    Abc_Print( -2, "\t-i     : toggle using implications [default = %s]\n", pPars->fUseImps? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle latch correspondence only [default = %s]\n", pPars->fLatchCorr? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle AIG rewriting [default = %s]\n", pPars->fRewrite? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle fraiging (combinational SAT sweeping) [default = %s]\n", pPars->fFraiging? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle writing implications as assertions [default = %s]\n", pPars->fWriteImps? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle using one-hotness conditions [default = %s]\n", pPars->fUse1Hot? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSeqSweep2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    Ssw_Pars_t Pars, * pPars = &Pars;
    int c, nConstrs = 0;
    extern Abc_Ntk_t * Abc_NtkDarSeqSweep2( Abc_Ntk_t * pNtk, Ssw_Pars_t * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Ssw_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PQFCLSIVMNXcmplkodsefqvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nPartSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nPartSize < 2 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nOverSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nOverSize < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesK = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesK <= 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit <= 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxLevs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxLevs <= 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesAddSim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesAddSim < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nItersStop = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nItersStop < 0 )
                goto usage;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSatVarMax2 = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSatVarMax2 < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRecycleCalls2 = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRecycleCalls2 < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nConstrs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConstrs < 0 )
                goto usage;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLimitMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLimitMax < 0 )
                goto usage;
            break;
        case 'c':
            pPars->fConstrs ^= 1;
            break;
        case 'm':
            pPars->fMergeFull ^= 1;
            break;
        case 'p':
            pPars->fPolarFlip ^= 1;
            break;
        case 'l':
            pPars->fLatchCorr ^= 1;
            break;
        case 'k':
            pPars->fConstCorr ^= 1;
            break;
        case 'o':
            pPars->fOutputCorr ^= 1;
            break;
//        case 'f':
//            pPars->fSemiFormal ^= 1;
//            break;
        case 'd':
            pPars->fDynamic ^= 1;
            break;
        case 's':
            pPars->fLocalSim ^= 1;
            break;
        case 'e':
            pPars->fEquivDump ^= 1;
            break;
        case 'f':
            pPars->fEquivDump2 ^= 1;
            break;
        case 'q':
            pPars->fStopWhenGone ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fFlopVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( 0, "The network is combinational (run \"fraig\" or \"fraig_sweep\").\n" );
        return 0;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( 0, "This command works only for structrally hashed networks. Run \"st\".\n" );
        return 0;
    }

    if ( Abc_NtkPiNum(pNtk) == 0 )
    {
        Abc_Print( 0, "This command works only for designs with primary inputs.\n" );
        return 0;
    }

    // if constraints are to be used, network should have no constraints
    if ( nConstrs > 0 )
    {
        if ( Abc_NtkConstrNum(pNtk) > 0 )
        {
            Abc_Print( -1, "The network already has %d constraints.\n", Abc_NtkConstrNum(pNtk) );
            return 0;
        }
        else
        {
            Abc_Print( 0, "Setting the number of constraints to be %d.\n", nConstrs );
            pNtk->nConstrs = nConstrs;
        }
    }

    if ( pPars->fConstrs )
    {
        if ( Abc_NtkConstrNum(pNtk) == Abc_NtkPoNum(pNtk) )
        {
            Abc_Print( 0, "Command cannot be applied because the network has only constraint outputs (no primary outputs).\n" );
            return 0;
        }
        if ( Abc_NtkConstrNum(pNtk) > 0 )
            Abc_Print( 0, "Performing scorr with %d constraints.\n", Abc_NtkConstrNum(pNtk) );
        else
        {
            Abc_Print( 0, "Performing constraint-based scorr without constraints.\n" );
            pPars->fConstrs = 0;
        }
    }
    if ( pPars->fEquivDump && pPars->fEquivDump2 )
    {
        Abc_Print( 0, "Command line switches \'-e\' and \'-f\' cannot be used at the same time.\n" );
        return 0;
    }

    // get the new network
    pNtkRes = Abc_NtkDarSeqSweep2( pNtk, pPars );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Sequential sweeping has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: scorr [-PQFCLSIVMNX <num>] [-cmplkodsefqvwh]\n" );
    Abc_Print( -2, "\t         performs sequential sweep using K-step induction\n" );
    Abc_Print( -2, "\t-P num : max partition size (0 = no partitioning) [default = %d]\n", pPars->nPartSize );
    Abc_Print( -2, "\t-Q num : partition overlap (0 = no overlap) [default = %d]\n", pPars->nOverSize );
    Abc_Print( -2, "\t-F num : number of time frames for induction (1=simple) [default = %d]\n", pPars->nFramesK );
    Abc_Print( -2, "\t-C num : max number of conflicts at a node (0=inifinite) [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-L num : max number of levels to consider (0=all) [default = %d]\n", pPars->nMaxLevs );
    Abc_Print( -2, "\t-N num : number of last POs treated as constraints (0=none) [default = %d]\n", pPars->fConstrs );
    Abc_Print( -2, "\t-S num : additional simulation frames for c-examples (0=none) [default = %d]\n", pPars->nFramesAddSim );
    Abc_Print( -2, "\t-I num : iteration number to stop and output SR-model (-1=none) [default = %d]\n", pPars->nItersStop );
    Abc_Print( -2, "\t-V num : min var num needed to recycle the SAT solver [default = %d]\n", pPars->nSatVarMax2 );
    Abc_Print( -2, "\t-M num : min call num needed to recycle the SAT solver [default = %d]\n", pPars->nRecycleCalls2 );
    Abc_Print( -2, "\t-N num : set last <num> POs to be constraints (use with -c) [default = %d]\n", nConstrs );
    Abc_Print( -2, "\t-X num : the number of iterations of little or no improvement [default = %d]\n", pPars->nLimitMax );
    Abc_Print( -2, "\t-c     : toggle using explicit constraints [default = %s]\n", pPars->fConstrs? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle full merge if constraints are present [default = %s]\n", pPars->fMergeFull? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle aligning polarity of SAT variables [default = %s]\n", pPars->fPolarFlip? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle doing latch correspondence [default = %s]\n", pPars->fLatchCorr? "yes": "no" );
    Abc_Print( -2, "\t-k     : toggle doing constant correspondence [default = %s]\n", pPars->fConstCorr? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle doing \'PO correspondence\' [default = %s]\n", pPars->fOutputCorr? "yes": "no" );
//    Abc_Print( -2, "\t-f     : toggle filtering using iterative BMC [default = %s]\n", pPars->fSemiFormal? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle dynamic addition of constraints [default = %s]\n", pPars->fDynamic? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle local simulation in the cone of influence [default = %s]\n", pPars->fLocalSim? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle dumping disproved internal equivalences [default = %s]\n", pPars->fEquivDump? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle dumping proved internal equivalences [default = %s]\n", pPars->fEquivDump2? "yes": "no" );
    Abc_Print( -2, "\t-q     : toggle quitting when PO is not a constant candidate [default = %s]\n", pPars->fStopWhenGone? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printout of flop equivalences [default = %s]\n", pPars->fFlopVerbose? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestSeqSweep( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * pFileName;
    Fra_Ssw_t Pars, * pPars = &Pars;
    int c;
//    extern Abc_Ntk_t * Abc_NtkDarSeqSweep( Abc_Ntk_t * pNtk, Fra_Ssw_t * pPars );
    extern int Fra_FraigInductionTest( char * pFileName, Fra_Ssw_t * pParams );

    // set defaults
    pPars->nPartSize  = 0;
    pPars->nOverSize  = 0;
    pPars->nFramesP   = 0;
    pPars->nFramesK   = 1;
    pPars->nMaxImps   = 5000;
    pPars->nMaxLevs   = 0;
    pPars->fUseImps   = 0;
    pPars->fRewrite   = 0;
    pPars->fFraiging  = 0;
    pPars->fLatchCorr = 0;
    pPars->fWriteImps = 0;
    pPars->fUse1Hot   = 0;
    pPars->fVerbose   = 0;
    pPars->TimeLimit  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PQNFILirfletvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nPartSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nPartSize < 2 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nOverSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nOverSize < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesP = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesP < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesK = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesK <= 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxImps = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxImps <= 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMaxLevs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMaxLevs <= 0 )
                goto usage;
            break;
        case 'i':
            pPars->fUseImps ^= 1;
            break;
        case 'r':
            pPars->fRewrite ^= 1;
            break;
        case 'f':
            pPars->fFraiging ^= 1;
            break;
        case 'l':
            pPars->fLatchCorr ^= 1;
            break;
        case 'e':
            pPars->fWriteImps ^= 1;
            break;
        case 't':
            pPars->fUse1Hot ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    // get the input file name
    if ( argc == globalUtilOptind + 1 )
        pFileName = argv[globalUtilOptind];
    else
    {
        Abc_Print( -1, "File name should be given on the command line.\n" );
        return 1;
    }
    Fra_FraigInductionTest( pFileName, pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: testssw [-PQNFL num] [-lrfetvh] <file>\n" );
    Abc_Print( -2, "\t         performs sequential sweep using K-step induction\n" );
    Abc_Print( -2, "\t         (outputs a file with a set of pairs of equivalent nodes)\n" );
    Abc_Print( -2, "\t-P num : max partition size (0 = no partitioning) [default = %d]\n", pPars->nPartSize );
    Abc_Print( -2, "\t-Q num : partition overlap (0 = no overlap) [default = %d]\n", pPars->nOverSize );
    Abc_Print( -2, "\t-N num : number of time frames to use as the prefix [default = %d]\n", pPars->nFramesP );
    Abc_Print( -2, "\t-F num : number of time frames for induction (1=simple) [default = %d]\n", pPars->nFramesK );
    Abc_Print( -2, "\t-L num : max number of levels to consider (0=all) [default = %d]\n", pPars->nMaxLevs );
//    Abc_Print( -2, "\t-I num : max number of implications to consider [default = %d]\n", pPars->nMaxImps );
//    Abc_Print( -2, "\t-i     : toggle using implications [default = %s]\n", pPars->fUseImps? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle latch correspondence only [default = %s]\n", pPars->fLatchCorr? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle AIG rewriting [default = %s]\n", pPars->fRewrite? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle fraiging (combinational SAT sweeping) [default = %s]\n", pPars->fFraiging? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle writing implications as assertions [default = %s]\n", pPars->fWriteImps? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle using one-hotness conditions [default = %s]\n", pPars->fUse1Hot? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestScorr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkTestScorr( char * pFileNameIn, char * pFileNameOut, int nStepsMax, int nBTLimit, int fNewAlgo, int fFlopOnly, int fFfNdOnly, int fVerbose );

    Abc_Ntk_t * pNtkRes;
    int c;
    int nConfMax;
    int nStepsMax;
    int fNewAlgo;
    int fFlopOnly;
    int fFfNdOnly;
    int fVerbose;
    // set defaults
    nConfMax  = 100;
    nStepsMax =  -1;
    fNewAlgo  =   0;
    fFlopOnly =   0;
    fFfNdOnly =   0;
    fVerbose  =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CSnfsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nStepsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nStepsMax < 0 )
                goto usage;
            break;
        case 'n':
            fNewAlgo ^= 1;
            break;
        case 'f':
            fFlopOnly ^= 1;
            break;
        case 's':
            fFfNdOnly ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( argc != globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Expecting two files names on the command line.\n" );
        goto usage;
    }
    if ( fFlopOnly && fFfNdOnly )
    {
        Abc_Print( -1, "These two options (-f and -s) are incompatible.\n" );
        goto usage;
    }
    // get the new network
    pNtkRes = Abc_NtkTestScorr( argv[globalUtilOptind], argv[globalUtilOptind+1], nStepsMax, nConfMax, fNewAlgo, fFlopOnly, fFfNdOnly, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Sequential sweeping has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: testscorr [-CS num] [-nfsvh] <file_in> <file_out>\n" );
    Abc_Print( -2, "\t             outputs the list of sequential equivalences into a file\n" );
    Abc_Print( -2, "\t             (if <file_in> is in BENCH, init state file should be the same directory)\n" );
    Abc_Print( -2, "\t-C num     : limit on the number of conflicts [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-S num     : limit on refinement iterations (-1=no limit, 0=after BMC, etc) [default = %d]\n", nStepsMax );
    Abc_Print( -2, "\t-n         : toggle between \"scorr\" and \"&scorr\" [default = %s]\n", fNewAlgo? "&scorr": "scorr" );
    Abc_Print( -2, "\t-f         : toggle reporting only flop/flop equivs [default = %s]\n", fFlopOnly? "yes": "no" );
    Abc_Print( -2, "\t-s         : toggle reporting only flop/flop and flop/node equivs [default = %s]\n", fFfNdOnly? "yes": "no" );
    Abc_Print( -2, "\t-v         : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h         : print the command usage\n");
    Abc_Print( -2, "\t<file_in>  : input file with design for sequential equivalence computation\n");
    Abc_Print( -2, "\t<file_out> : output file with the list of pairs of equivalent signals\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandLcorr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int nFramesP;
    int nConfMax;
    int nVarsMax;
    int nLimitMax;
    int fNewAlgor;
    int fVerbose;
    extern Abc_Ntk_t * Abc_NtkDarLcorr( Abc_Ntk_t * pNtk, int nFramesP, int nConfMax, int fVerbose );
    extern Abc_Ntk_t * Abc_NtkDarLcorrNew( Abc_Ntk_t * pNtk, int nVarsMax, int nConfMax, int nLimitMax, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);



    // set defaults
    nFramesP   =     0;
    nConfMax   =  1000;
    nVarsMax   =  1000;
    nLimitMax  =     0;
    fNewAlgor  =     1;
    fVerbose   =     0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PCSXnvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nFramesP = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFramesP < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nVarsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVarsMax < 0 )
                goto usage;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by an integer.\n" );
                goto usage;
            }
            nLimitMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLimitMax < 0 )
                goto usage;
            break;
        case 'n':
            fNewAlgor ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "The network is combinational (run \"fraig\" or \"fraig_sweep\").\n" );
        return 0;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for structrally hashed networks. Run \"st\".\n" );
        return 0;
    }

    // get the new network
    if ( fNewAlgor )
        pNtkRes = Abc_NtkDarLcorrNew( pNtk, nVarsMax, nConfMax, nLimitMax, fVerbose );
    else
        pNtkRes = Abc_NtkDarLcorr( pNtk, nFramesP, nConfMax, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Sequential sweeping has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: lcorr [-PCSX num] [-nvh]\n" );
    Abc_Print( -2, "\t         computes latch correspondence using 1-step induction\n" );
    Abc_Print( -2, "\t-P num : number of time frames to use as the prefix [default = %d]\n", nFramesP );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-S num : the max number of SAT variables [default = %d]\n", nVarsMax );
    Abc_Print( -2, "\t-X num : the number of iterations of little or no improvement [default = %d]\n", nLimitMax );
    Abc_Print( -2, "\t-n     : toggle using new algorithm [default = %s]\n", fNewAlgor? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSeqCleanup( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int c;
    int fLatchConst  =   1;
    int fLatchEqual  =   1;
    int fSaveNames   =   1;
    int fUseMvSweep  =   0;
    int nFramesSymb  =   1;
    int nFramesSatur = 512;
    int fVerbose     =   0;
    int fVeryVerbose =   0;
    pNtk = Abc_FrameReadNtk(pAbc);

    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "cenmFSvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fLatchConst ^= 1;
            break;
        case 'e':
            fLatchEqual ^= 1;
            break;
        case 'n':
            fSaveNames ^= 1;
            break;
        case 'm':
            fUseMvSweep ^= 1;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFramesSymb = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFramesSymb < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nFramesSatur = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFramesSatur < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for structrally hashed networks.\n" );
        return 1;
    }
    if ( !Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    // modify the current network
    pNtkRes = Abc_NtkDarLatchSweep( pNtk, fLatchConst, fLatchEqual, fSaveNames, fUseMvSweep, nFramesSymb, nFramesSatur, fVerbose, fVeryVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Sequential cleanup has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: scleanup [-cenmFSvwh]\n" );
    Abc_Print( -2, "\t         performs sequential cleanup of the current network\n" );
    Abc_Print( -2, "\t         by removing nodes and latches that do not feed into POs\n" );
    Abc_Print( -2, "\t-c     : sweep stuck-at latches detected by ternary simulation [default = %s]\n", fLatchConst? "yes": "no" );
    Abc_Print( -2, "\t-e     : merge equal latches (same data inputs and init states) [default = %s]\n", fLatchEqual? "yes": "no" );
    Abc_Print( -2, "\t-n     : toggle preserving latch names [default = %s]\n", fSaveNames? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle using hybrid ternary/symbolic simulation [default = %s]\n", fUseMvSweep? "yes": "no" );
    Abc_Print( -2, "\t-F num : the number of first frames simulated symbolically [default = %d]\n", nFramesSymb );
    Abc_Print( -2, "\t-S num : the number of frames when symbolic saturation begins [default = %d]\n", nFramesSatur );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle very verbose output [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCycle( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nFrames;
    int fUseXval;
    int fVerbose;
    extern void Abc_NtkCycleInitState( Abc_Ntk_t * pNtk, int nFrames, int fUseXval, int fVerbose );
    extern void Abc_NtkCycleInitStateSop( Abc_Ntk_t * pNtk, int nFrames, int fVerbose );
    // set defaults
    nFrames    = 100;
    fUseXval   =   0;
    fVerbose   =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fxvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'x':
            fUseXval ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) && !Abc_NtkIsSopLogic(pNtk) )
    {
        Abc_Print( -1, "Only works for strashed networks or logic SOP networks.\n" );
        return 1;
    }
    if ( !Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( fUseXval && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "X-valued simulation only works for AIGs. Run \"strash\".\n" );
        return 0;
    }
    if ( fUseXval )
        Abc_NtkCycleInitState( pNtk, nFrames, 1, fVerbose );
    else if ( Abc_NtkIsStrash(pNtk) )
        Abc_NtkCycleInitState( pNtk, nFrames, 0, fVerbose );
    else
        Abc_NtkCycleInitStateSop( pNtk, nFrames, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: cycle [-F num] [-xvh]\n" );
    Abc_Print( -2, "\t         cycles sequential circuit for the given number of timeframes\n" );
    Abc_Print( -2, "\t         to derive a new initial state (which may be on the envelope)\n" );
    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-x     : use x-valued primary inputs [default = %s]\n", fUseXval? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandXsim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nFrames;
    int fXInputs;
    int fXState;
    int fVerbose;
    extern void Abc_NtkXValueSimulate( Abc_Ntk_t * pNtk, int nFrames, int fXInputs, int fXState, int fVerbose );
    // set defaults
    nFrames    = 10;
    fXInputs   =  0;
    fXState    =  0;
    fVerbose   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fisvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'i':
            fXInputs ^= 1;
            break;
        case 's':
            fXState ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for strashed networks.\n" );
        return 1;
    }
    if ( !Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    Abc_NtkXValueSimulate( pNtk, nFrames, fXInputs, fXState, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: xsim [-F num] [-isvh]\n" );
    Abc_Print( -2, "\t         performs X-valued simulation of the AIG\n" );
    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-i     : toggle X-valued representation of inputs [default = %s]\n", fXInputs? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle X-valued representation of state [default = %s]\n", fXState? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int fNew;
    int fComb;
    int nFrames;
    int nWords;
    int TimeOut;
    int fMiter;
    int fVerbose;
    char * pFileSim;
    char * pLogFileName = NULL;
    extern int Abc_NtkDarSeqSim( Abc_Ntk_t * pNtk, int nFrames, int nWords, int TimeOut, int fNew, int fMiter, int fVerbose, char * pFileSim );
    // set defaults
    fNew       =  0;
    fComb      =  0;
    nFrames    = 32;
    nWords     =  8;
    TimeOut    = 30;
    fMiter     =  1;
    fVerbose   =  0;
    pFileSim   = NULL;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWTALnmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeOut < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a file name.\n" );
                goto usage;
            }
            pFileSim = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'n':
            fNew ^= 1;
            break;
        case 'm':
            fMiter ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for strashed networks.\n" );
        return 1;
    }
    if ( pFileSim != NULL && Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "Currently simulation with user-specified patterns works only for comb miters.\n" );
        return 1;
    }
    ABC_FREE( pNtk->pSeqModel );
    pAbc->Status = Abc_NtkDarSeqSim( pNtk, nFrames, nWords, TimeOut, fNew, fMiter, fVerbose, pFileSim );
    Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "sim" );
    return 0;

usage:
    Abc_Print( -2, "usage: sim [-FWT num] [-AL file] [-nmvh]\n" );
    Abc_Print( -2, "\t          performs random simulation of the sequential miter\n" );
    Abc_Print( -2, "\t-F num  : the number of frames to simulate [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-W num  : the number of words to simulate [default = %d]\n", nWords );
    Abc_Print( -2, "\t-T num  : approximate runtime limit in seconds [default = %d]\n", TimeOut );
    Abc_Print( -2, "\t-A file : text file name with user's patterns [default = random simulation]\n" );
    Abc_Print( -2, "\t          (patterns are listed, one per line, as sequences of 0s and 1s)\n" );
    Abc_Print( -2, "\t-L file : the log file name [default = %s]\n",  pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-n      : toggle new vs. old implementation [default = %s]\n", fNew? "new": "old" );
    Abc_Print( -2, "\t-m      : toggle miter vs. any circuit [default = %s]\n", fMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSim3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_NtkDarSeqSim3( Abc_Ntk_t * pNtk, Ssw_RarPars_t * pPars );
    Ssw_RarPars_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtkRes, * pNtk = Abc_FrameReadNtk(pAbc);
    Vec_Ptr_t * vSeqModelVec;
    char * pLogFileName = NULL;
    int c;
    Ssw_RarSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWBRSNTGLadivzh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBinSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBinSize < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRestart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRestart < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRandSeed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRandSeed < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOut < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOutGap = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOutGap < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'a':
            pPars->fSolveAll ^= 1;
            break;
        case 'd':
            pPars->fDropSatOuts ^= 1;
            break;
        case 'i':
            pPars->fSetLastState ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'z':
            pPars->fNotVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for strashed networks.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "Only works for sequential networks.\n" );
        return 1;
    }
    ABC_FREE( pNtk->pSeqModel );
    pAbc->Status = Abc_NtkDarSeqSim3( pNtk, pPars );
    Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    vSeqModelVec = pNtk->vSeqModelVec;  pNtk->vSeqModelVec = NULL;
    if ( pPars->fSetLastState && pAbc->pNtkCur->pData )
    {
        Abc_Obj_t * pObj;
        Vec_Int_t * vInit = (Vec_Int_t *)pAbc->pNtkCur->pData;
        pAbc->pNtkCur->pData = NULL;
        Abc_NtkForEachLatch( pAbc->pNtkCur, pObj, c )
            if ( Vec_IntEntry(vInit, c) )
                Abc_LatchSetInit1( pObj );
        Vec_IntFree( vInit );
        pNtkRes = Abc_NtkRestrashZero( pAbc->pNtkCur, 0 );
        if ( pNtkRes == NULL )
        {
            Abc_Print( -1, "Removing SAT outputs has failed.\n" );
            return 1;
        }
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        pNtk = Abc_FrameReadNtk(pAbc);
    }
    if ( pPars->fSolveAll && pPars->fDropSatOuts )
    {
        if ( vSeqModelVec == NULL )
            Abc_Print( 1,"The array of counter-examples is not available.\n" );
        else if ( Vec_PtrSize(vSeqModelVec) != Abc_NtkPoNum(pNtk) )
            Abc_Print( 1,"The array size does not match the number of outputs.\n" );
        else
        {
            extern void Abc_NtkDropSatOutputs( Abc_Ntk_t * pNtk, Vec_Ptr_t * vCexes, int fVerbose );
            Abc_NtkDropSatOutputs( pNtk, vSeqModelVec, pPars->fVerbose );
            pNtkRes = Abc_NtkDarLatchSweep( pNtk, 1, 1, 1, 0, -1, -1, 0, 0 );
            if ( pNtkRes == NULL )
            {
                Abc_Print( -1, "Removing SAT outputs has failed.\n" );
                return 1;
            }
            Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        }
    }
    if ( vSeqModelVec )
    {
        Abc_FrameReplaceCexVec( pAbc, &vSeqModelVec );
        pAbc->nFrames = -1;
    }
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "sim3" );
    return 0;

usage:
    Abc_Print( -2, "usage: sim3 [-FWBRSNTG num] [-L file] [-advzh]\n" );
    Abc_Print( -2, "\t         performs random simulation of the sequential miter\n" );
    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n",                         pPars->nFrames );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n",                          pPars->nWords );
    Abc_Print( -2, "\t-B num : the number of flops in one bin [default = %d]\n",                           pPars->nBinSize );
    Abc_Print( -2, "\t-R num : the number of simulation rounds [default = %d]\n",                          pPars->nRounds );
    Abc_Print( -2, "\t-S num : the number of rounds before a restart [default = %d]\n",                    pPars->nRestart );
    Abc_Print( -2, "\t-N num : random number seed (1 <= num <= 1000) [default = %d]\n",                    pPars->nRandSeed );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n",                     pPars->TimeOut );
    Abc_Print( -2, "\t-G num : approximate runtime gap in seconds since the last CEX [default = %d]\n",    pPars->TimeOutGap );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n",                                          pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-a     : toggle solving all outputs (do not stop when one is SAT) [default = %s]\n", pPars->fSolveAll?    "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle dropping (replacing by 0) SAT outputs [default = %s]\n",             pPars->fDropSatOuts? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggle changing init state to a last rare state [default = %s]\n",          pPars->fVerbose?     "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",                      pPars->fVerbose?     "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle suppressing report about solved outputs [default = %s]\n",           pPars->fNotVerbose?  "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDarPhase( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int nFrames, nPref;
    int fIgnore;
    int fPrint;
    int fUpdateCex;
    int c, fVerbose;
    extern Abc_Ntk_t * Abc_NtkPhaseAbstract( Abc_Ntk_t * pNtk, int nFrames, int nPref, int fIgnore, int fPrint, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nFrames     = 0;
    nPref       = 0;
    fIgnore     = 0;
    fPrint      = 0;
    fUpdateCex  = 0;
    fVerbose    = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FPipcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPref = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPref < 0 )
                goto usage;
            break;
        case 'i':
            fIgnore ^= 1;
            break;
        case 'p':
            fPrint ^= 1;
            break;
        case 'c':
            fUpdateCex ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for structrally hashed networks.\n" );
        return 1;
    }
    if ( fUpdateCex )
    {
        Abc_Cex_t * pCexNew;
        if ( pAbc->pCex == NULL )
        {
            Abc_Print( -1, "Counter-example is not available.\n" );
            return 1;
        }
        if ( pAbc->pCex->nPis % Abc_NtkPiNum(pNtk) != 0 )
        {
            Abc_Print( -1, "PI count of the CEX is not a multiple of PI count of the current AIG.\n" );
            return 1;
        }
        pCexNew = Abc_CexTransformPhase( pAbc->pCex, Abc_NtkPiNum(pNtk), Abc_NtkPoNum(pNtk), Abc_NtkLatchNum(pNtk) );
        {
            Aig_Man_t * pAig = Abc_NtkToDar( pNtk, 0, 1 );
            Gia_Man_t * pGia = Gia_ManFromAig( pAig );
            int iPo = Gia_ManSetFailedPoCex( pGia, pCexNew );
            Gia_ManStop( pGia );
            Aig_ManStop( pAig );
            if ( iPo == -1 )
            {
                Abc_Print( -1, "The counter-example does not fail any of the outputs of the original AIG.\n" );
                return 1;
            }
        }
        Abc_FrameReplaceCex( pAbc, &pCexNew );
        return 0;
    }
    if ( !Abc_NtkLatchNum(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( fPrint )
    {
        Abc_NtkPhaseAbstract( pNtk, 0, nPref, fIgnore, 1, fVerbose );
        return 0;
    }
    // modify the current network
    pNtkRes = Abc_NtkPhaseAbstract( pNtk, nFrames, nPref, fIgnore, 0, fVerbose );
    if ( pNtkRes == NULL )
    {
//        Abc_Print( -1, "Phase abstraction has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: phase [-FP <num>] [-ipcvh]\n" );
    Abc_Print( -2, "\t         performs sequential cleanup of the current network\n" );
    Abc_Print( -2, "\t         by removing nodes and latches that do not feed into POs\n" );
    Abc_Print( -2, "\t-F num : the number of frames to abstract [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-P num : the number of prefix frames to skip [default = %d]\n", nPref );
    Abc_Print( -2, "\t-i     : toggle ignoring the initial state [default = %s]\n", fIgnore? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle printing statistics about generators [default = %s]\n", fPrint? "yes": "no" );
    Abc_Print( -2, "\t-c     : update the current CEX derived for a new AIG after \"phase\"\n" );
    Abc_Print( -2, "\t         to match the current AIG (the one before \"phase\") [default = %s]\n", fUpdateCex? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSynch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtkRes, * pNtk1, * pNtk2, * pNtk;
    char ** pArgvNew;
    int nArgcNew;
    int fDelete1, fDelete2;
    int c;
    int nWords;
    int fVerbose;

    extern Abc_Ntk_t * Abc_NtkDarSynch( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nWords, int fVerbose );
    extern Abc_Ntk_t * Abc_NtkDarSynchOne( Abc_Ntk_t * pNtk, int nWords, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nWords   =  32;
    fVerbose =   1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Wvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords <= 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew == 0 )
    {
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Empty network.\n" );
            return 1;
        }
        pNtkRes = Abc_NtkDarSynchOne( pNtk, nWords, fVerbose );
    }
    else
    {
        if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
            return 1;
        if ( Abc_NtkLatchNum(pNtk1) == 0 || Abc_NtkLatchNum(pNtk2) == 0 )
        {
            if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
            if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
            Abc_Print( -1, "The network has no latches..\n" );
            return 0;
        }

        // modify the current network
        pNtkRes = Abc_NtkDarSynch( pNtk1, pNtk2, nWords, fVerbose );
        if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Synchronization has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: synch [-W <num>] [-vh] <file1> <file2>\n" );
    Abc_Print( -2, "\t         derives and applies synchronization sequence\n" );
    Abc_Print( -2, "\t-W num : the number of simulation words [default = %d]\n", nWords );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tfile1  : (optional) the file with the first design\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second design\n\n");
    Abc_Print( -2, "\t         If no designs are given on the command line,\n" );
    Abc_Print( -2, "\t         assumes the current network has no initial state,\n" );
    Abc_Print( -2, "\t         derives synchronization sequence and applies it.\n\n" );
    Abc_Print( -2, "\t         If two designs are given on the command line\n" );
    Abc_Print( -2, "\t         assumes both of them have no initial state,\n" );
    Abc_Print( -2, "\t         derives sequences for both designs, synchorinizes\n" );
    Abc_Print( -2, "\t         them, and creates SEC miter comparing two designs.\n\n" );
    Abc_Print( -2, "\t         If only one design is given on the command line,\n" );
    Abc_Print( -2, "\t         considers the second design to be the current network,\n" );
    Abc_Print( -2, "\t         and derives SEC miter for them, as described above.\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandClockGate( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cgt_Par_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtkRes, * pNtk, * pNtkCare;
    int c;

    extern Abc_Ntk_t * Abc_NtkDarClockGate( Abc_Ntk_t * pNtk, Abc_Ntk_t * pCare, Cgt_Par_t * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Cgt_SetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "LNDCVKavwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLevelMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLevelMax <= 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCandMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCandMax <= 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nOdcMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nOdcMax <= 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfMax <= 0 )
                goto usage;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nVarsMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVarsMin <= 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFlopsMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFlopsMin <= 0 )
                goto usage;
            break;
        case 'a':
            pPars->fAreaOnly ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }

    if ( argc == globalUtilOptind + 1 )
    {
        pNtkCare = Io_Read( argv[globalUtilOptind], Io_ReadFileType(argv[globalUtilOptind]), 1, 0 );
        if ( pNtkCare == NULL )
        {
            Abc_Print( -1, "Reading care network has failed.\n" );
            return 1;
        }
        // modify the current network
        pNtkRes = Abc_NtkDarClockGate( pNtk, pNtkCare, pPars );
        Abc_NtkDelete( pNtkCare );
    }
    else if ( argc == globalUtilOptind )
    {
        pNtkRes = Abc_NtkDarClockGate( pNtk, NULL, pPars );
    }
    else
    {
        Abc_Print( -1, "Wrong number of arguments.\n" );
        return 0;
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Clock gating has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: clockgate [-LNDCVK <num>] [-avwh] <file>\n" );
    Abc_Print( -2, "\t         sequential clock gating with observability don't-cares\n" );
    Abc_Print( -2, "\t-L num : max level number of a clock gate [default = %d]\n", pPars->nLevelMax );
    Abc_Print( -2, "\t-N num : max number of candidates for a flop [default = %d]\n", pPars->nCandMax );
    Abc_Print( -2, "\t-D num : max number of ODC levels to consider [default = %d]\n", pPars->nOdcMax );
    Abc_Print( -2, "\t-C num : max number of conflicts at a node [default = %d]\n", pPars->nConfMax );
    Abc_Print( -2, "\t-V num : min number of vars to recycle SAT solver [default = %d]\n", pPars->nVarsMin );
    Abc_Print( -2, "\t-K num : min number of flops to recycle SAT solver [default = %d]\n", pPars->nFlopsMin );
    Abc_Print( -2, "\t-a     : toggle minimizing area-only [default = %s]\n", pPars->fAreaOnly? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle even more detailed output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tfile   : (optional) constraints for primary inputs and register outputs\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandExtWin( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtkRes, * pNtk;
    int c;
    int nObjId;
    int nDist;
    int fVerbose;

    extern Abc_Ntk_t * Abc_NtkDarExtWin( Abc_Ntk_t * pNtk, int nObjId, int nDist, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nObjId   = -1;
    nDist    =  5;
    fVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NDvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nObjId = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nObjId <= 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nDist = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDist <= 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for structrally hashed networks.\n" );
        return 1;
    }

    if ( argc != globalUtilOptind )
    {
        Abc_Print( -1, "Not enough command-line arguments.\n" );
        return 1;
    }
    // modify the current network
    pNtkRes = Abc_NtkDarExtWin( pNtk, nObjId, nDist, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Extracting sequential window has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: extwin [-ND <num>] [-vh]\n" );
    Abc_Print( -2, "\t         extracts sequential window from the AIG\n" );
    Abc_Print( -2, "\t-N num : the ID of the object to use as the center [default = %d]\n", nObjId );
    Abc_Print( -2, "\t-D num : the \"radius\" of the window [default = %d]\n", nDist );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandInsWin( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtkRes, * pNtk, * pNtkCare;
    int c;
    int nObjId;
    int nDist;
    int fVerbose;

    extern Abc_Ntk_t * Abc_NtkDarInsWin( Abc_Ntk_t * pNtk, Abc_Ntk_t * pWnd, int nObjId, int nDist, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nObjId   = -1;
    nDist    =  5;
    fVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NDvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nObjId = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nObjId <= 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nDist = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDist <= 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Only works for structrally hashed networks.\n" );
        return 1;
    }

    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Not enough command-line arguments.\n" );
        return 1;
    }
    pNtkCare = Io_Read( argv[globalUtilOptind], Io_ReadFileType(argv[globalUtilOptind]), 1, 0 );
    if ( pNtkCare == NULL )
    {
        Abc_Print( -1, "Reading care network has failed.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtkCare) )
    {
        Abc_Ntk_t * pNtkTemp;
        pNtkCare = Abc_NtkStrash( pNtkTemp = pNtkCare, 0, 1, 0 );
        Abc_NtkDelete( pNtkTemp );
    }
    // modify the current network
    pNtkRes = Abc_NtkDarInsWin( pNtk, pNtkCare, nObjId, nDist, fVerbose );
    Abc_NtkDelete( pNtkCare );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Inserting sequential window has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: inswin [-ND <num>] [-vh] <file>\n" );
    Abc_Print( -2, "\t         inserts sequential window into the AIG\n" );
    Abc_Print( -2, "\t-N num : the ID of the object to use as the center [default = %d]\n", nObjId );
    Abc_Print( -2, "\t-D num : the \"radius\" of the window [default = %d]\n", nDist );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tfile   : file with the AIG to be inserted\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSymFun( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Ntk_SymFunGenerate( int nVars, int fVerbose );
    word * pFun = NULL;
    char * pStr,  * pTruth, * pCommand;
    int c, k, nVars = -1, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a file name.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }
    if ( nVars != -1 )
    {
        if ( nVars < 1 || nVars > 16 )
        {
            printf( "Cannot generate functions for less than 1 and more than %d variables.\n", nVars );
            return 1;
        }
        Ntk_SymFunGenerate( nVars, fVerbose );
        return 0;
    }
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Not enough command-line arguments.\n" );
        return 1;
    }
    // make sure the string is composed of N+1 zeros and ones
    pStr = argv[globalUtilOptind];
    nVars = strlen(pStr) - 1;
    for ( k = 0; k <= nVars; k++ )
        if ( pStr[k] != '0' && pStr[k] != '1' )
            break;
    if ( k <= nVars )
    {
        Abc_Print( -1, "The string should be composed of zeros and ones.\n" );
        return 1;
    }
    // generate and print one function
    pFun = Abc_TtSymFunGenerate( pStr, nVars );
    pTruth = ABC_CALLOC( char, nVars > 2 ? (1 << (nVars-2)) + 1 : 2 );
    Extra_PrintHexadecimalString( pTruth, (unsigned *)pFun, nVars );
    ABC_FREE( pFun );
    if ( fVerbose )
    {
        if ( nVars > 6 )
            printf( "Generated truth table of the %d-variable function and set it as the current network.\n", nVars );
        else
            printf( "Generated truth table of the %d-variable function (%s) and set it as the current network\n", nVars, pTruth );
    }
    else if ( nVars <= 8 )
        printf( "%s\n", pTruth );
    // read the truth table to be the current network in ABC
    pCommand = ABC_CALLOC( char, strlen(pTruth) + 100 );
    sprintf( pCommand, "read_truth %s", pTruth );
    Cmd_CommandExecute( pAbc, pCommand );
    ABC_FREE( pCommand );
    ABC_FREE( pTruth );
    return 0;

usage:
    Abc_Print( -2, "usage: symfun [-N num] [-vh] <ones>\n" );
    Abc_Print( -2, "\t           generated a single-output symmetric function\n" );
    Abc_Print( -2, "\t-N <num> : prints truth tables of all N-var symmetric functions [default = not used]\n" );
    Abc_Print( -2, "\t-v       : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\t<ones>   : the string of N+1 zeros and ones, where N is the number of variables\n" );
    Abc_Print( -2, "\t           For example, to get 3-input NAND-gate, use \"symfun 1000\".\n" );
    Abc_Print( -2, "\t           To get 5-input majority gate, use \"symfun 000111\".\n" );

    return 1;
}
/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPermute( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkRestrashRandom( Abc_Ntk_t * pNtk );
    extern void Abc_NtkPermutePiUsingFanout( Abc_Ntk_t * pNtk );
    Abc_Ntk_t * pNtk = pAbc->pNtkCur, * pNtkRes = NULL;
    char * pFlopPermFile = NULL;
    int fInputs = 1;
    int fOutputs = 1;
    int fFlops = 1;
    int fNodes = 1;
    int fFanout = 0;
    int Seed = -1;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "SFiofnxh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            Seed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Seed < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a file name.\n" );
                goto usage;
            }
            pFlopPermFile = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'i':
            fInputs ^= 1;
            break;
        case 'o':
            fOutputs ^= 1;
            break;
        case 'f':
            fFlops ^= 1;
            break;
        case 'n':
            fNodes ^= 1;
            break;
        case 'x':
            fFanout ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }
    if ( Seed >= 0 )
        srand( (unsigned)Seed );
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( fFanout )
    {
        if ( Abc_NtkLatchNum(pNtk) )
        {
            Abc_Print( -1, "Currently \"permute -x\" works only for combinational networks.\n" );
            return 1;
        }
        Abc_NtkPermutePiUsingFanout( pNtk );
        return 0;
    }
    if ( fNodes && !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "To permute nodes, the network should be structurally hashed.\n" );
        return 1;
    }
    if ( fNodes )
        pNtkRes = Abc_NtkRestrashRandom( pNtk );
    else
        pNtkRes = Abc_NtkDup( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command \"permute\" has failed.\n" );
        return 1;
    }
    Abc_NtkPermute( pNtkRes, fInputs, fOutputs, fFlops, pFlopPermFile );
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: permute [-S num] [-iofnxh] [-F filename]\n" );
    Abc_Print( -2, "\t                performs random permutation of inputs/outputs/flops\n" );
    Abc_Print( -2, "\t-S num        : the random seed to generate permutations (0 <= num < INT_MAX) [default = %d]\n", Seed );
    Abc_Print( -2, "\t-i            : toggle permuting primary inputs [default = %s]\n", fInputs? "yes": "no" );
    Abc_Print( -2, "\t-o            : toggle permuting primary outputs [default = %s]\n", fOutputs? "yes": "no" );
    Abc_Print( -2, "\t-f            : toggle permuting flip-flops [default = %s]\n", fFlops? "yes": "no" );
    Abc_Print( -2, "\t-n            : toggle deriving new topological ordering of nodes [default = %s]\n", fNodes? "yes": "no" );
    Abc_Print( -2, "\t-x            : toggle permuting inputs based on their fanout count [default = %s]\n", fFanout? "yes": "no" );
    Abc_Print( -2, "\t-h            : print the command usage\n");
    Abc_Print( -2, "\t-F <filename> : (optional) file with the flop permutation\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandUnpermute( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = pAbc->pNtkCur, * pNtkRes = NULL;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    pNtkRes = Abc_NtkDup( pNtk );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Command \"unpermute\" has failed.\n" );
        return 1;
    }
    Abc_NtkUnpermute( pNtkRes );
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: unpermute [-h]\n" );
    Abc_Print( -2, "\t        restores inputs/outputs/flops before the last permutation\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCubeEnum( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_EnumerateCubeStates();
    extern void Abc_EnumerateCubeStatesZdd();
    int c, fZddAlgo = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "zvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'z':
            fZddAlgo ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }
    if ( fZddAlgo )
        Abc_EnumerateCubeStatesZdd();
    else
        Abc_EnumerateCubeStates();
    return 0;

usage:
    Abc_Print( -2, "usage: cubeenum [-vh]\n" );
    Abc_Print( -2, "\t         enumerates reachable states of 2x2x2 cube\n" );
    Abc_Print( -2, "\t         (http://en.wikipedia.org/wiki/Pocket_Cube)\n" );
    Abc_Print( -2, "\t-z     : toggle using ZDD-based algorithm [default = %s]\n", fZddAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPathEnum( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_EnumerateFrontierTest( int nSize );
    int c, nSize = 4, fZddAlgo = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSize < 0 )
                goto usage;
            break;
        case 'z':
            fZddAlgo ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }
    Abc_EnumerateFrontierTest( nSize );
    return 0;

usage:
    Abc_Print( -2, "usage: pathenum [-N num] [-vh]\n" );
    Abc_Print( -2, "\t         enumerates self-avoiding paths on the NxN grid\n" );
    Abc_Print( -2, "\t-N num : the size of the grid to consider [default = %d]\n", nSize );
//    Abc_Print( -2, "\t-z     : toggle using ZDD-based algorithm [default = %s]\n", fZddAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFunEnum( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Dtt_EnumerateLf( int nVars, int nNodeMax, int fDelay, int fMulti, int fVerbose, char* pFileName );
    extern void Dau_FunctionEnum( int nInputs, int nVars, int nNodeMax, int fUseTwo, int fReduce, int fVerbose );
    extern Gia_Man_t * Dau_ConstructAigFromFile( char * pFileName );
    int c, nInputs = 4, nVars = 4, nNodeMax = 32, fUseTwo = 0, fReduce = 0, fSimple = 0, fDelay = 0, fMulti = 0, fDump = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "SIMtrldmpvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nInputs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInputs < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodeMax < 0 )
                goto usage;
            break;
        case 't':
            fUseTwo ^= 1;
            break;
        case 'r':
            fReduce ^= 1;
            break;
        case 'l':
            fSimple ^= 1;
            break;
        case 'd':
            fDelay ^= 1;
            break;
        case 'm':
            fMulti ^= 1;
            break;
        case 'p':
            fDump ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }
    if ( fSimple || fDelay )
    {
        char Buffer[100];
        if ( nVars < 3 || nVars > 5 )
        {
            Abc_Print( -1, "The number of inputs should be 3 <= I <= 5.\n" );
            goto usage;
        }
        sprintf( Buffer, "Lflib%d.txt", nVars );
        Dtt_EnumerateLf( nVars, nNodeMax, fDelay, fMulti, fVerbose, fDump?Buffer:NULL );
        if ( fDump )
        {
            Gia_Man_t * pTemp;
            pTemp = Dau_ConstructAigFromFile( Buffer );
            Abc_FrameUpdateGia( pAbc, pTemp );
            Gia_DumpAiger( pTemp, "Lflib", nVars, 1 );
        }
    }
    else
    {
        if ( nVars < 2 || nVars > 6 )
        {
            Abc_Print( -1, "The number of inputs should be 2 <= I <= 6.\n" );
            goto usage;
        }
        if ( nInputs < nVars || nInputs > 6 )
        {
            Abc_Print( -1, "The intermediate support size should be I <= S <= 6.\n" );
            goto usage;
        }
        Dau_FunctionEnum( nInputs, nVars, nNodeMax, fUseTwo, fReduce, fVerbose );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: funenum [-SIM num] [-trldmvph]\n" );
    Abc_Print( -2, "\t         enumerates minimum 2-input-gate implementations\n" );
    Abc_Print( -2, "\t-S num : the maximum intermediate support size [default = %d]\n",     nInputs );
    Abc_Print( -2, "\t-I num : the number of inputs of Boolean functions [default = %d]\n", nVars );
    Abc_Print( -2, "\t-M num : the maximum number of 2-input gates [default = %d]\n",       nNodeMax );
    Abc_Print( -2, "\t-t     : toggle adding combination of two gates [default = %s]\n",    fUseTwo?  "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle reducing the last level [default = %s]\n",            fReduce?  "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle generating L(f) rather than C(f) [default = %s]\n",   fSimple?  "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle generating D(f) rather than C(f) [default = %s]\n",   fDelay?   "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle generating multiplicity statistics [default = %s]\n", fMulti?   "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n",                     fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle dumping result library (formula and AIG) [default = %s]\n",fDump?"yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}



/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[16];
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int nArgcNew;
    int c;
    int fSat;
    int fVerbose;
    int nSeconds;
    int nPartSize;
    int nConfLimit;
    int nInsLimit;
    int fPartition;
    int fIgnoreNames;

    extern void Abc_NtkCecSat( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nConfLimit, int nInsLimit );
    extern void Abc_NtkCecFraig( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nSeconds, int fVerbose );
    extern void Abc_NtkCecFraigPart( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nSeconds, int nPartSize, int fVerbose );
    extern void Abc_NtkCecFraigPartAuto( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nSeconds, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fSat     =  0;
    fVerbose =  0;
    nSeconds = 20;
    nPartSize  = 0;
    nConfLimit = 10000;
    nInsLimit  = 0;
    fPartition = 0;
    fIgnoreNames = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "TCIPpsnvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nSeconds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSeconds < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nInsLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInsLimit < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPartSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPartSize < 0 )
                goto usage;
            break;
        case 'p':
            fPartition ^= 1;
            break;
        case 's':
            fSat ^= 1;
            break;
        case 'n':
            fIgnoreNames ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pNtk && pNtk->vPhases != NULL )
    {
        Abc_Print( -1, "Cannot compare networks with phases defined.\n" );
        return 1;
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
        return 1;

    if ( fIgnoreNames )
    {
        if ( !fDelete1 )
        {
            pNtk1 = Abc_NtkStrash( pNtk1, 0, 1, 0 );
            fDelete1 = 1;
        }
        if ( !fDelete2 )
        {
            pNtk2 = Abc_NtkStrash( pNtk2, 0, 1, 0 );
            fDelete2 = 1;
        }
        Abc_NtkShortNames( pNtk1 );
        Abc_NtkShortNames( pNtk2 );
    }

    // perform equivalence checking
    if ( fPartition )
        Abc_NtkCecFraigPartAuto( pNtk1, pNtk2, nSeconds, fVerbose );
    else if ( nPartSize )
        Abc_NtkCecFraigPart( pNtk1, pNtk2, nSeconds, nPartSize, fVerbose );
    else if ( fSat )
        Abc_NtkCecSat( pNtk1, pNtk2, nConfLimit, nInsLimit );
    else
        Abc_NtkCecFraig( pNtk1, pNtk2, nSeconds, fVerbose );

    if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
    if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    return 0;

usage:
    if ( nPartSize == 0 )
        strcpy( Buffer, "unused" );
    else
        sprintf(Buffer, "%d", nPartSize );
    Abc_Print( -2, "usage: cec [-T num] [-C num] [-I num] [-P num] [-psnvh] <file1> <file2>\n" );
    Abc_Print( -2, "\t         performs combinational equivalence checking\n" );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", nSeconds );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n",    nConfLimit );
    Abc_Print( -2, "\t-I num : limit on the number of clause inspections [default = %d]\n", nInsLimit );
    Abc_Print( -2, "\t-P num : partition size for multi-output networks [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-p     : toggle automatic partitioning [default = %s]\n", fPartition? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle \"SAT only\" and \"FRAIG + SAT\" [default = %s]\n", fSat? "SAT only": "FRAIG + SAT" );
    Abc_Print( -2, "\t-n     : toggle how CIs/COs are matched (by name or by order) [default = %s]\n", fIgnoreNames? "by order": "by name" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tfile1  : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second network\n");
    Abc_Print( -2, "\t         if no files are given, uses the current network and its spec\n");
    Abc_Print( -2, "\t         if one file is given, uses the current network and the file\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDCec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int nArgcNew;
    int c;
    int fSat;
    int fVerbose;
    int nSeconds;
    int nConfLimit;
    int nInsLimit;
    int fPartition;
    int fMiter;

    extern int Abc_NtkDSat( Abc_Ntk_t * pNtk, ABC_INT64_T nConfLimit, ABC_INT64_T nInsLimit, int nLearnedStart, int nLearnedDelta, int nLearnedPerce, int fAlignPol, int fAndOuts, int fNewSolver, int fVerbose );
    extern int Abc_NtkDarCec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nConfLimit, int fPartition, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fSat     =  0;
    fVerbose =  0;
    nSeconds = 20;
    nConfLimit = 10000;
    nInsLimit  = 0;
    fPartition = 0;
    fMiter     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "TCIpmsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nSeconds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSeconds < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nInsLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInsLimit < 0 )
                goto usage;
            break;
        case 'p':
            fPartition ^= 1;
            break;
        case 'm':
            fMiter ^= 1;
            break;
        case 's':
            fSat ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( fMiter )
    {
        if ( pNtk == NULL )
        {
            Abc_Print( -1, "Empty network.\n" );
            return 1;
        }
        if ( Abc_NtkIsStrash(pNtk) )
        {
            pNtk1 = pNtk;
            fDelete1 = 0;
        }
        else
        {
            pNtk1 = Abc_NtkStrash( pNtk, 0, 1, 0 );
            fDelete1 = 1;
        }
        pNtk2 = NULL;
        fDelete2 = 0;
    }
    else
    {
        if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
            return 1;
    }

    if ( (pNtk1 && Abc_NtkLatchNum(pNtk1)) || (pNtk2 && Abc_NtkLatchNum(pNtk2)) )
    {
        if ( pNtk1 && fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( pNtk2 && fDelete2 ) Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "Currently this command only works for networks without latches. Run \"comb\".\n" );
        return 1;
    }

    // perform equivalence checking
    if ( fSat && fMiter )
        Abc_NtkDSat( pNtk1, nConfLimit, nInsLimit, 0, 0, 0, 0, 0, 0, fVerbose );
    else
        Abc_NtkDarCec( pNtk1, pNtk2, nConfLimit, fPartition, fVerbose );

    if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
    if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    return 0;

usage:
    Abc_Print( -2, "usage: dcec [-T num] [-C num] [-I num] [-mpsvh] <file1> <file2>\n" );
    Abc_Print( -2, "\t         performs combinational equivalence checking\n" );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", nSeconds );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n",    nConfLimit );
    Abc_Print( -2, "\t-I num : limit on the number of clause inspections [default = %d]\n", nInsLimit );
    Abc_Print( -2, "\t-m     : toggle working on two networks or a miter [default = %s]\n", fMiter? "miter": "two networks" );
    Abc_Print( -2, "\t-p     : toggle automatic partitioning [default = %s]\n", fPartition? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle \"SAT only\" (miter) or \"FRAIG + SAT\" [default = %s]\n", fSat? "SAT only": "FRAIG + SAT" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tfile1  : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second network\n");
    Abc_Print( -2, "\t         if no files are given, uses the current network and its spec\n");
    Abc_Print( -2, "\t         if one file is given, uses the current network and the file\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDSec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Fra_Sec_t SecPar, * pSecPar = &SecPar;
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int nArgcNew;
    int c, fCheck = 1;
    int fIgnoreNames;

    extern int Abc_NtkDarSec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, Fra_Sec_t * p );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Fra_SecSetDefaultParams( pSecPar );
    pSecPar->TimeLimit = 0;
    fIgnoreNames = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FTarmfncvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nFramesMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->TimeLimit < 0 )
                goto usage;
            break;
        case 'a':
            pSecPar->fPhaseAbstract ^= 1;
            break;
        case 'r':
            pSecPar->fRetimeFirst ^= 1;
            break;
        case 'm':
            pSecPar->fRetimeRegs ^= 1;
            break;
        case 'f':
            pSecPar->fFraiging ^= 1;
            break;
        case 'n':
            fIgnoreNames ^= 1;
            break;
        case 'c':
            fCheck ^= 1;
            break;
        case 'v':
            pSecPar->fVerbose ^= 1;
            break;
        case 'w':
            pSecPar->fVeryVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, fCheck ) )
        return 1;
    if ( Abc_NtkLatchNum(pNtk1) == 0 || Abc_NtkLatchNum(pNtk2) == 0 )
    {
        if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
        Abc_Print( -1, "The network has no latches. Used combinational command \"cec\".\n" );
        return 0;
    }

    if ( fIgnoreNames )
    {
        if ( !fDelete1 )
        {
            pNtk1 = Abc_NtkStrash( pNtk1, 0, 1, 0 );
            fDelete1 = 1;
        }
        if ( !fDelete2 )
        {
            pNtk2 = Abc_NtkStrash( pNtk2, 0, 1, 0 );
            fDelete2 = 1;
        }
        Abc_NtkShortNames( pNtk1 );
        Abc_NtkShortNames( pNtk2 );
    }

    // perform verification
    pAbc->Status = Abc_NtkDarSec( pNtk1, pNtk2, pSecPar );

    if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
    if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    return 0;

usage:
    Abc_Print( -2, "usage: dsec [-F num] [-T num] [-armfncvwh] <file1> <file2>\n" );
    Abc_Print( -2, "\t         performs inductive sequential equivalence checking\n" );
    Abc_Print( -2, "\t-F num : the limit on the depth of induction [default = %d]\n", pSecPar->nFramesMax );
    Abc_Print( -2, "\t-T num : the approximate runtime limit (in seconds) [default = %d]\n", pSecPar->TimeLimit );
    Abc_Print( -2, "\t-a     : toggles the use of phase abstraction [default = %s]\n", pSecPar->fPhaseAbstract? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggles forward retiming at the beginning [default = %s]\n", pSecPar->fRetimeFirst? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggles min-register retiming [default = %s]\n", pSecPar->fRetimeRegs? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggles the internal use of fraiging [default = %s]\n", pSecPar->fFraiging? "yes": "no" );
    Abc_Print( -2, "\t-n     : toggles how CIs/COs are matched (by name or by order) [default = %s]\n", fIgnoreNames? "by order": "by name" );
    Abc_Print( -2, "\t-c     : toggles performing internal netlist check [default = %s]\n", fCheck? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", pSecPar->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggles additional verbose output [default = %s]\n", pSecPar->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tfile1  : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second network\n");
    Abc_Print( -2, "\t         if no files are given, uses the current network and its spec\n");
    Abc_Print( -2, "\t         if one file is given, uses the current network and the file\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDProve( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Fra_Sec_t SecPar, * pSecPar = &SecPar;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    char * pLogFileName = NULL;
    int nBmcFramesMax = 20;
    int nBmcConfMax = 2000;

    extern void Fra_SecSetDefaultParams( Fra_Sec_t * p );
    extern int Abc_NtkDarProve( Abc_Ntk_t * pNtk, Fra_Sec_t * pSecPar, int nBmcFramesMax, int nBmcConfMax );
    // set defaults
    Fra_SecSetDefaultParams( pSecPar );
//    pSecPar->TimeLimit = 300;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "cbAEFCGDVBRTLarmfijkoupwvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            pSecPar->fTryComb ^= 1;
            break;
        case 'b':
            pSecPar->fTryBmc ^= 1;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            nBmcFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBmcFramesMax < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by an integer.\n" );
                goto usage;
            }
            nBmcConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBmcConfMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nFramesMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nBTLimit < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nBTLimitGlobal = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nBTLimitGlobal < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nBTLimitInter = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nBTLimitInter < 0 )
                goto usage;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nBddVarsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nBddVarsMax < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nBddMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nBddMax < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nBddIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nBddIterMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pSecPar->nPdrTimeout = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pSecPar->nPdrTimeout < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'a':
            pSecPar->fPhaseAbstract ^= 1;
            break;
        case 'r':
            pSecPar->fRetimeFirst ^= 1;
            break;
        case 'm':
            pSecPar->fRetimeRegs ^= 1;
            break;
        case 'f':
            pSecPar->fFraiging ^= 1;
            break;
        case 'i':
            pSecPar->fInduction ^= 1;
            break;
        case 'j':
            pSecPar->fInterpolation ^= 1;
            break;
        case 'k':
            pSecPar->fInterSeparate ^= 1;
            break;
        case 'o':
            pSecPar->fReorderImage ^= 1;
            break;
        case 'u':
            pSecPar->fReadUnsolved ^= 1;
            break;
        case 'p':
            pSecPar->fUsePdr ^= 1;
            break;
        case 'w':
            pSecPar->fVeryVerbose ^= 1;
            break;
        case 'v':
            pSecPar->fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for structrally hashed networks. Run \"st\".\n" );
        return 0;
    }
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }

    // perform verification
    pAbc->Status = Abc_NtkDarProve( pNtk, pSecPar, nBmcFramesMax, nBmcConfMax );
    Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "dprove" );

    // read back the resulting unsolved reduced sequential miter
    if ( pSecPar->fReadUnsolved && pSecPar->nSMnumber >= 0 )
    {
        char FileName[100];
        sprintf(FileName, "sm%02d.aig", pSecPar->nSMnumber );
        pNtk = Io_Read( FileName, Io_ReadFileType(FileName), 1, 0 );
        if ( pNtk == NULL )
            Abc_Print( -1, "Cannot read back unsolved reduced sequential miter \"%s\",\n", FileName );
        else
            Abc_FrameReplaceCurrentNetwork( pAbc, pNtk );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dprove [-AEFCGDVBRT num] [-L file] [-cbarmfijoupvwh]\n" );
    Abc_Print( -2, "\t         performs SEC on the sequential miter\n" );
    Abc_Print( -2, "\t-A num : the limit on the depth of BMC [default = %d]\n", nBmcFramesMax );
    Abc_Print( -2, "\t-E num : the conflict limit during BMC [default = %d]\n", nBmcConfMax );
    Abc_Print( -2, "\t-F num : the limit on the depth of induction [default = %d]\n", pSecPar->nFramesMax );
    Abc_Print( -2, "\t-C num : the conflict limit at a node during induction [default = %d]\n", pSecPar->nBTLimit );
    Abc_Print( -2, "\t-G num : the global conflict limit during induction [default = %d]\n", pSecPar->nBTLimitGlobal );
    Abc_Print( -2, "\t-D num : the conflict limit during interpolation [default = %d]\n", pSecPar->nBTLimitInter );
    Abc_Print( -2, "\t-V num : the flop count limit for BDD-based reachablity [default = %d]\n", pSecPar->nBddVarsMax );
    Abc_Print( -2, "\t-B num : the BDD size limit in BDD-based reachablity [default = %d]\n", pSecPar->nBddMax );
    Abc_Print( -2, "\t-R num : the max number of reachability iterations [default = %d]\n", pSecPar->nBddIterMax );
    Abc_Print( -2, "\t-T num : the timeout for property directed reachability [default = %d]\n", pSecPar->nPdrTimeout );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-c     : toggles using CEC before attempting SEC [default = %s]\n", pSecPar->fTryComb? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggles using BMC before attempting SEC [default = %s]\n", pSecPar->fTryBmc? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggles the use of phase abstraction [default = %s]\n", pSecPar->fPhaseAbstract? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggles forward retiming at the beginning [default = %s]\n", pSecPar->fRetimeFirst? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggles min-register retiming [default = %s]\n", pSecPar->fRetimeRegs? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggles the internal use of fraiging [default = %s]\n", pSecPar->fFraiging? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggles the use of induction [default = %s]\n", pSecPar->fInduction? "yes": "no" );
    Abc_Print( -2, "\t-j     : toggles the use of interpolation [default = %s]\n", pSecPar->fInterpolation? "yes": "no" );
    Abc_Print( -2, "\t-k     : toggles applying interpolation to each output [default = %s]\n", pSecPar->fInterSeparate? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggles using BDD variable reordering during image computation [default = %s]\n", pSecPar->fReorderImage? "yes": "no" );
    Abc_Print( -2, "\t-u     : toggles reading back unsolved reduced sequential miter [default = %s]\n", pSecPar->fReadUnsolved? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggles trying property directed reachability in the end [default = %s]\n", pSecPar->fUsePdr? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", pSecPar->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggles additional verbose output [default = %s]\n", pSecPar->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tCommand \"dprove\" can also be used for sequential synthesis (dprove -brjopu)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbSec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int nArgcNew;
    int fMiter, nFrames, fVerbose, c;

    extern int Abc_NtkDarAbSec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nFrames, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fMiter   = 1;
    nFrames  = 2;
    fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'm':
            fMiter ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( fMiter )
    {
//        pNtk = Io_Read( argv[globalUtilOptind], Io_ReadFileType(argv[globalUtilOptind]), 1, 0 );
        if ( argc == globalUtilOptind + 1 )
        {
            Abc_Print( -1, "The miter cannot be given on the command line. Use \"read\".\n" );
            return 0;
        }
        if ( !Abc_NtkIsStrash(pNtk) )
        {
            Abc_Print( -1, "The miter should be structurally hashed. Use \"st\"\n" );
            return 0;
        }
        if ( Abc_NtkDarAbSec( pNtk, NULL, nFrames, fVerbose ) == 1 )
            pAbc->Status = 1;
        else
            pAbc->Status = -1;
    }
    else
    {
        pArgvNew = argv + globalUtilOptind;
        nArgcNew = argc - globalUtilOptind;
        if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
            return 1;
        if ( Abc_NtkLatchNum(pNtk1) == 0 || Abc_NtkLatchNum(pNtk2) == 0 )
        {
            if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
            if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
            Abc_Print( -1, "The network has no latches. Used combinational command \"cec\".\n" );
            return 0;
        }
        // perform verification
        if ( Abc_NtkDarAbSec( pNtk1, pNtk2, nFrames, fVerbose ) == 1 )
            pAbc->Status = 1;
        else
            pAbc->Status = -1;
        if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: absec [-F num] [-mv] <file1> <file2>\n" );
    Abc_Print( -2, "\t         performs SEC by applying CEC to several timeframes\n" );
    Abc_Print( -2, "\t-F num : the total number of timeframes to use [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-m     : toggles miter vs. two networks [default = %s]\n", fMiter? "miter": "two networks" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\tfile1  : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second network\n");
    Abc_Print( -2, "\t         if no files are given, uses the current network and its spec\n");
    Abc_Print( -2, "\t         if one file is given, uses the current network and the file\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSimSec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Ssw_Pars_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int nArgcNew, c;
    int fMiter;

    extern int Abc_NtkDarSimSec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, Ssw_Pars_t * pPars );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fMiter = 1;
    Ssw_ManSetDefaultParams( pPars );
    pPars->fPartSigCorr = 1;
    pPars->fVerbose     = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FDcymvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesK = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesK < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIsleDist = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIsleDist < 0 )
                goto usage;
            break;
        case 'm':
            fMiter ^= 1;
            break;
        case 'c':
            pPars->fPartSigCorr ^= 1;
            break;
        case 'y':
            pPars->fDumpSRInit ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( fMiter )
    {
//        Abc_Ntk_t * pNtkA, * pNtkB;
        if ( !Abc_NtkIsStrash(pNtk) )
        {
            Abc_Print( -1, "This command works only for structrally hashed networks. Run \"st\".\n" );
            return 0;
        }
        Abc_NtkDarSimSec( pNtk, NULL, pPars );
/*
        pNtkA = Abc_NtkDup( pNtk );
        pNtkB = Abc_NtkDup( pNtk );
        Abc_NtkDarSimSec( pNtkA, pNtkB, pPars );
        Abc_NtkDelete( pNtkA );
        Abc_NtkDelete( pNtkB );
*/
    }
    else
    {
        pArgvNew = argv + globalUtilOptind;
        nArgcNew = argc - globalUtilOptind;
        if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
            return 1;
        if ( Abc_NtkLatchNum(pNtk1) == 0 || Abc_NtkLatchNum(pNtk2) == 0 )
        {
            if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
            if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
            Abc_Print( -1, "The network has no latches. Used combinational command \"cec\".\n" );
            return 0;
        }
        // perform verification
        Abc_NtkDarSimSec( pNtk1, pNtk2, pPars );
        if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: simsec [-FD num] [-mcyv] <file1> <file2>\n" );
    Abc_Print( -2, "\t         performs SEC using structural similarity\n" );
    Abc_Print( -2, "\t-F num : the limit on the depth of induction [default = %d]\n", pPars->nFramesK );
    Abc_Print( -2, "\t-D num : the distance for extending islands [default = %d]\n", pPars->nIsleDist );
    Abc_Print( -2, "\t-m     : toggles miter vs. two networks [default = %s]\n", fMiter? "miter": "two networks" );
    Abc_Print( -2, "\t-c     : uses partial vs. full signal correspondence [default = %s]\n", pPars->fPartSigCorr? "partial": "full" );
    Abc_Print( -2, "\t-y     : dumps speculatively reduced miter of the classes [default = %s]\n", pPars->fDumpSRInit? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\tfile1  : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second network\n");
    Abc_Print( -2, "\t         if no files are given, uses the current network and its spec\n");
    Abc_Print( -2, "\t         if one file is given, uses the current network and the file\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandMatch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtk1, * pNtk2, * pNtkRes;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int nArgcNew, c;
    int fMiter;
    int nDist;
    int fVerbose;

    extern Abc_Ntk_t * Abc_NtkDarMatch( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nDist, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fMiter = 0;
    nDist = 0;
    fVerbose = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Dmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nDist = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDist < 0 )
                goto usage;
            break;
        case 'm':
            fMiter ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( fMiter )
    {
//        Abc_Ntk_t * pNtkA, * pNtkB;
        if ( !Abc_NtkIsStrash(pNtk) )
        {
            Abc_Print( -1, "This command works only for structrally hashed networks. Run \"st\".\n" );
            return 0;
        }
        pNtkRes = Abc_NtkDarMatch( pNtk, NULL, nDist, fVerbose );
/*
        pNtkA = Abc_NtkDup( pNtk );
        pNtkB = Abc_NtkDup( pNtk );
        Abc_NtkDarSimSec( pNtkA, pNtkB, pPars );
        Abc_NtkDelete( pNtkA );
        Abc_NtkDelete( pNtkB );
*/
    }
    else
    {
        pArgvNew = argv + globalUtilOptind;
        nArgcNew = argc - globalUtilOptind;
        if ( !Abc_NtkPrepareTwoNtks( stdout, pNtk, pArgvNew, nArgcNew, &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
            return 1;
        if ( Abc_NtkLatchNum(pNtk1) == 0 || Abc_NtkLatchNum(pNtk2) == 0 )
        {
            if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
            if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
            Abc_Print( -1, "The network has no latches. Used combinational command \"cec\".\n" );
            return 0;
        }
        // perform verification
        pNtkRes = Abc_NtkDarMatch( pNtk1, pNtk2, nDist, fVerbose );
        if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    }
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Matching has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: match [-D num] [-mv] <file1> <file2>\n" );
    Abc_Print( -2, "\t         detects structural similarity using simulation\n" );
    Abc_Print( -2, "\t         replaces the current network by the miter of differences\n" );
    Abc_Print( -2, "\t-D num : the distance for extending differences [default = %d]\n", nDist );
    Abc_Print( -2, "\t-m     : toggles miter vs. two networks [default = %s]\n", fMiter? "miter": "two networks" );
    Abc_Print( -2, "\t-v     : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\tfile1  : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second network\n");
    Abc_Print( -2, "\t         if no files are given, uses the current network and its spec\n");
    Abc_Print( -2, "\t         if one file is given, uses the current network and the file\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int RetValue;
    int fVerbose;
    int nConfLimit;
    int nInsLimit;
    abctime clk;
    // set defaults
    fVerbose   = 0;
    nConfLimit = 0;
    nInsLimit  = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CIvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nInsLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInsLimit < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Currently can only solve the miter for combinational circuits.\n" );
        return 0;
    }

    clk = Abc_Clock();
    if ( Abc_NtkIsStrash(pNtk) )
    {
        RetValue = Abc_NtkMiterSat( pNtk, (ABC_INT64_T)nConfLimit, (ABC_INT64_T)nInsLimit, fVerbose, NULL, NULL );
    }
    else
    {
        assert( Abc_NtkIsLogic(pNtk) );
        Abc_NtkToBdd( pNtk );
        RetValue = Abc_NtkMiterSat( pNtk, (ABC_INT64_T)nConfLimit, (ABC_INT64_T)nInsLimit, fVerbose, NULL, NULL );
    }

    // verify that the pattern is correct
    if ( RetValue == 0 && Abc_NtkPoNum(pNtk) == 1 )
    {
        //int i;
        //Abc_Obj_t * pObj;
        int * pSimInfo = Abc_NtkVerifySimulatePattern( pNtk, pNtk->pModel );
        if ( pSimInfo[0] != 1 )
            Abc_Print( 1, "ERROR in Abc_NtkMiterSat(): Generated counter example is invalid.\n" );
        ABC_FREE( pSimInfo );
        /*
        // print model
        Abc_NtkForEachPi( pNtk, pObj, i )
        {
            Abc_Print( -1, "%d", (int)(pNtk->pModel[i] > 0) );
            if ( i == 70 )
                break;
        }
        Abc_Print( -1, "\n" );
        */
    }
    pAbc->Status = RetValue;
    if ( RetValue == -1 )
        Abc_Print( 1, "UNDECIDED      " );
    else if ( RetValue == 0 )
        Abc_Print( 1, "SATISFIABLE    " );
    else
        Abc_Print( 1, "UNSATISFIABLE  " );
    //Abc_Print( -1, "\n" );
    Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
    return 0;

usage:
    Abc_Print( -2, "usage: sat [-C num] [-I num] [-vh]\n" );
    Abc_Print( -2, "\t         solves the combinational miter using SAT solver MiniSat-1.14\n" );
    Abc_Print( -2, "\t         derives CNF from the current network and leave it unchanged\n" );
    Abc_Print( -2, "\t         (there is also a newer SAT solving command \"dsat\")\n" );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n",    nConfLimit );
    Abc_Print( -2, "\t-I num : limit on the number of inspections [default = %d]\n", nInsLimit );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDSat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int RetValue;
    int fAlignPol;
    int fAndOuts;
    int fNewSolver;
    int fSilent;
    int fShowPattern;
    int fVerbose;
    int nConfLimit;
    int nLearnedStart;
    int nLearnedDelta;
    int nLearnedPerce;
    int nInsLimit;
    abctime clk;

    extern int Abc_NtkDSat( Abc_Ntk_t * pNtk, ABC_INT64_T nConfLimit, ABC_INT64_T nInsLimit, int nLearnedStart, int nLearnedDelta, int nLearnedPerce, int fAlignPol, int fAndOuts, int fNewSolver, int fVerbose );
    // set defaults
    fAlignPol  = 0;
    fAndOuts   = 0;
    fNewSolver = 0;
    fSilent    = 0;
    fShowPattern = 0;
    fVerbose   = 0;
    nConfLimit = 0;
    nInsLimit  = 0;
    nLearnedStart = 0;
    nLearnedDelta = 0;
    nLearnedPerce = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CILDEpansvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nInsLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInsLimit < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLearnedStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLearnedStart < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nLearnedDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLearnedDelta < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by an integer.\n" );
                goto usage;
            }
            nLearnedPerce = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLearnedPerce < 0 )
                goto usage;
            break;
        case 'p':
            fAlignPol ^= 1;
            break;
        case 'a':
            fAndOuts ^= 1;
            break;
        case 'n':
            fNewSolver ^= 1;
            break;
        case 's':
            fSilent ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fShowPattern ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( argc == globalUtilOptind + 1 )
    {
        int * pModel = NULL;
        extern int Cnf_DataSolveFromFile( char * pFileName, int nConfLimit, int nLearnedStart, int nLearnedDelta, int nLearnedPerce, int fVerbose, int fShowPattern, int ** ppModel, int nPis );
        // get the input file name
        char * pFileName = argv[globalUtilOptind];
        FILE * pFile = fopen( pFileName, "rb" );
        if ( pFile == NULL )
        {
            printf( "Cannot open file \"%s\" for writing.\n", pFileName );
            return 0;
        }
        fclose( pFile );
        Cnf_DataSolveFromFile( pFileName, nConfLimit, nLearnedStart, nLearnedDelta, nLearnedPerce, fVerbose, fShowPattern, &pModel, pNtk ? Abc_NtkPiNum(pNtk) : 0 );
        if ( pModel && pNtk )
        {
            int * pSimInfo = Abc_NtkVerifySimulatePattern( pNtk, pModel );
            if ( pSimInfo[0] != 1 )
                Abc_Print( 1, "ERROR in mapping PIs into SAT vars: Generated CEX is invalid.\n" );
            ABC_FREE( pSimInfo );
            pAbc->pCex = Abc_CexCreate( 0, Abc_NtkPiNum(pNtk), pModel, 0, 0, 0 );
        }
        ABC_FREE( pModel );
        return 0;
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Currently can only solve the miter for combinational circuits.\n" );
        return 0;
    }

    if ( Abc_NtkPoNum(pNtk) != 1 )
    {
        Abc_Print( -1, "Currently expects a single-output miter.\n" );
        return 0;
    }

    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    clk = Abc_Clock();
    RetValue = Abc_NtkDSat( pNtk, (ABC_INT64_T)nConfLimit, (ABC_INT64_T)nInsLimit, nLearnedStart, nLearnedDelta, nLearnedPerce, fAlignPol, fAndOuts, fNewSolver, fVerbose );
    // verify that the pattern is correct
    if ( RetValue == 0 && Abc_NtkPoNum(pNtk) == 1 )
    {
        int * pSimInfo = Abc_NtkVerifySimulatePattern( pNtk, pNtk->pModel );
        if ( pSimInfo[0] != 1 )
            Abc_Print( 1, "ERROR in Abc_NtkMiterSat(): Generated counter example is invalid.\n" );
        ABC_FREE( pSimInfo );
        pAbc->pCex = Abc_CexCreate( 0, Abc_NtkPiNum(pNtk), pNtk->pModel, 0, 0, 0 );
    }
    pAbc->Status = RetValue;
    if ( !fSilent )
    {
        if ( RetValue == -1 )
            Abc_Print( 1, "UNDECIDED      " );
        else if ( RetValue == 0 )
            Abc_Print( 1, "SATISFIABLE    " );
        else
            Abc_Print( 1, "UNSATISFIABLE  " );
        Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: dsat [-CILDE num] [-pansvh]\n" );
    Abc_Print( -2, "\t         solves the combinational miter using SAT solver MiniSat-1.14\n" );
    Abc_Print( -2, "\t         derives CNF from the current network and leaves it unchanged\n" );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n",    nConfLimit );
    Abc_Print( -2, "\t-I num : limit on the number of inspections [default = %d]\n", nInsLimit );
    Abc_Print( -2, "\t-L num : starting value for learned clause removal [default = %d]\n", nLearnedStart );
    Abc_Print( -2, "\t-D num : delta value for learned clause removal [default = %d]\n", nLearnedDelta );
    Abc_Print( -2, "\t-E num : ratio percentage for learned clause removal [default = %d]\n", nLearnedPerce );
    Abc_Print( -2, "\t-p     : align polarity of SAT variables [default = %s]\n", fAlignPol? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle ANDing/ORing of miter outputs [default = %s]\n", fAndOuts? "ANDing": "ORing" );
    Abc_Print( -2, "\t-n     : toggle using new solver [default = %s]\n", fNewSolver? "yes": "no" );
    Abc_Print( -2, "\t-s     : enable silent computation (no reporting) [default = %s]\n", fSilent? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandXSat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    abctime clk;
    int c;
    int fVerbose   = 0;
    int nConfLimit = 0;
    int nInsLimit  = 0;
    int nLearnedStart = 0;
    int nLearnedDelta = 0;
    int nLearnedPerce = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CILDEhv" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nInsLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInsLimit < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLearnedStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLearnedStart < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nLearnedDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLearnedDelta < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by an integer.\n" );
                goto usage;
            }
            nLearnedPerce = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLearnedPerce < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        case 'v':
            fVerbose ^= 1;
            break;

        default:
            goto usage;
        }
    }

    if ( argc == globalUtilOptind + 1 )
    {
        char * pFileName = argv[globalUtilOptind];
        xSAT_Solver_t * p;
        int status;

        FILE * pFile = fopen( pFileName, "rb" );
        if ( pFile == NULL )
        {
            printf( "Cannot open file \"%s\" for writing.\n", pFileName );
            return 0;
        }
        xSAT_SolverParseDimacs( pFile, &p );

        clk = Abc_Clock();
        status = xSAT_SolverSolve( p );
        fclose( pFile );

        xSAT_SolverPrintStats( p );
        if ( status == 0 )
            Abc_Print( 1, "UNDECIDED      " );
        else if ( status == 1 )
            Abc_Print( 1, "SATISFIABLE    " );
        else
            Abc_Print( 1, "UNSATISFIABLE  " );

        Abc_PrintTime( 1, "Time", Abc_Clock() - clk );

        xSAT_SolverDestroy( p );
        return 0;
    }

usage:
    Abc_Print( -2, "usage: xsat [-CILDE num] [-hv]<file>.cnf\n" );
    Abc_Print( -2, "\t         solves the combinational miter using SAT solver MiniSat-1.14\n" );
    Abc_Print( -2, "\t         derives CNF from the current network and leaves it unchanged\n" );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n",    nConfLimit );
    Abc_Print( -2, "\t-I num : limit on the number of inspections [default = %d]\n", nInsLimit );
    Abc_Print( -2, "\t-L num : starting value for learned clause removal [default = %d]\n", nLearnedStart );
    Abc_Print( -2, "\t-D num : delta value for learned clause removal [default = %d]\n", nLearnedDelta );
    Abc_Print( -2, "\t-E num : ratio percentage for learned clause removal [default = %d]\n", nLearnedPerce );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSatoko( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern satoko_opts_t * Cmd_DeriveOptionFromSettings( int argc, char ** argv );

    // create default options
    satoko_opts_t opts, * popts;
    satoko_default_opts(&opts);

    // override default options
    popts = Cmd_DeriveOptionFromSettings( argc, argv );
    if ( popts == NULL )
        goto usage;
    memcpy( &opts, popts, sizeof(satoko_opts_t) );
    ABC_FREE( popts );

    if ( argc == globalUtilOptind + 1 )
    {
        abctime clk;
        char * pFileName = argv[globalUtilOptind];
        satoko_t * p;
        int status;

        status = satoko_parse_dimacs( pFileName, &p );
        satoko_configure(p, &opts);

        clk = Abc_Clock();
        if ( status == SATOKO_OK )
            status = satoko_solve( p );

        if ( status == SATOKO_UNDEC )
            Abc_Print( 1, "UNDECIDED      " );
        else if ( status == SATOKO_SAT )
            Abc_Print( 1, "SATISFIABLE    " );
        else
            Abc_Print( 1, "UNSATISFIABLE  " );

        Abc_PrintTime( 1, "Time", Abc_Clock() - clk );

        satoko_destroy( p );
        return 0;
    }

usage:
#ifdef SATOKO_ACT_VAR_FIXED
    Abc_Print( -2, "usage: satoko [-CPDEFGHIJKLMNOQRSTU num] [-hv]<file>.cnf\n" );
#else
    Abc_Print( -2, "usage: satoko [-CPDEFGHIJKLMNOQRS num] [-hv]<file>.cnf\n" );
#endif
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n", opts.conf_limit );
    Abc_Print( -2, "\t-P num : limit on the number of propagations [default = %d]\n", opts.conf_limit );
    Abc_Print( -2, "\n\tConstants used for restart heuristic:\n");
    Abc_Print( -2, "\t-D num : Constant value used by restart heuristics in forcing restarts [default = %f]\n", opts.f_rst );
    Abc_Print( -2, "\t-E num : Constant value used by restart heuristics in  blocking restarts [default = %f]\n", opts.b_rst );
    Abc_Print( -2, "\t-F num : Lower bound n.of conflicts for start blocking restarts [default = %d]\n", opts.fst_block_rst );
    Abc_Print( -2, "\t-G num : Size of the moving avarege queue for LBD (force restart) [default = %d]\n", opts.sz_lbd_bqueue );
    Abc_Print( -2, "\t-H num : Size of the moving avarege queue for Trail size (block restart) [default = %d]\n", opts.sz_trail_bqueue );
    Abc_Print( -2, "\n\tConstants used for clause database reduction heuristic:\n");
    Abc_Print( -2, "\t-I num : N.of conflicts before first clause databese reduction [default = %d]\n", opts.n_conf_fst_reduce );
    Abc_Print( -2, "\t-J num : Increment to reduce [default = %d]\n", opts.inc_reduce );
    Abc_Print( -2, "\t-K num : Special increment to reduce [default = %d]\n", opts.inc_special_reduce );
    Abc_Print( -2, "\t-L num : Protecs clauses from deletion for one turn if its LBD is lower [default = %d]\n", opts.lbd_freeze_clause );
    Abc_Print( -2, "\t-M num : Percentage of learned clauses to remove [default = %d]\n", ( int )( 100 * opts.learnt_ratio ) );
    Abc_Print( -2, "\t-N num : Max percentage of garbage in clause database [default = %d]\n", ( int )( 100 * opts.garbage_max_ratio ) );
    Abc_Print( -2, "\n\tConstants used for binary resolution (clause minimization):\n");
    Abc_Print( -2, "\t-O num : Max clause size for binary resolution [default = %d]\n", opts.clause_max_sz_bin_resol );
    Abc_Print( -2, "\t-Q num : Min clause LBD for binary resolution [default = %d]\n", opts.clause_min_lbd_bin_resol );
    Abc_Print( -2, "\n\tConstants used for branching (VSIDS heuristic):\n");
    Abc_Print( -2, "\t-R num : Clause activity decay factor (when using float clause activity) [default = %f]\n", opts.clause_decay );
    Abc_Print( -2, "\t-S num : Varibale activity decay factor [default = %f]\n", opts.var_decay );
#ifdef SATOKO_ACT_VAR_FIXED
    Abc_Print( -2, "\t-T num : Variable activity limit valeu [default = 0x%08X]\n", opts.var_act_limit );
    Abc_Print( -2, "\t-U num : Variable activity re-scale factor [default = 0x%08X]\n", opts.var_act_rescale );
#endif
    Abc_Print( -2, "\n\t-v     : prints verbose information [default = %s]\n", opts.verbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Satoko( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManSatokoDimacs( char * pFileName, satoko_opts_t * opts );
    extern void Gia_ManSatokoCall( Gia_Man_t * p, satoko_opts_t * opts, int fSplit, int fIncrem );
    int c, fSplit = 0, fIncrem = 0;

    satoko_opts_t opts;
    satoko_default_opts(&opts);
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Csivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            opts.conf_limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( opts.conf_limit < 0 )
                goto usage;
            break;
        case 's':
            fSplit ^= 1;
            break;
        case 'i':
            fIncrem ^= 1;
            break;
        case 'v':
            opts.verbose ^= 1;
            break;
        case 'h':
            goto usage;

        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
    {
        Gia_ManSatokoDimacs( argv[globalUtilOptind], &opts );
        return 0;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Satoko(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManSatokoCall( pAbc->pGia, &opts, fSplit, fIncrem );
    return 0;

usage:
    Abc_Print( -2, "usage: &satoko [-C num] [-sivh] <file.cnf>\n" );
    Abc_Print( -2, "\t             run Satoko by Bruno Schmitt\n" );
    Abc_Print( -2, "\t-C num     : limit on the number of conflicts [default = %d]\n", opts.conf_limit );
    Abc_Print( -2, "\t-s         : split multi-output miter into individual outputs [default = %s]\n", fSplit? "yes": "no" );
    Abc_Print( -2, "\t-i         : split multi-output miter and solve incrementally [default = %s]\n", fIncrem? "yes": "no" );
    Abc_Print( -2, "\t-v         : prints verbose information [default = %s]\n", opts.verbose? "yes": "no" );
    Abc_Print( -2, "\t<file.cnf> : (optional) CNF file to solve\n");
    Abc_Print( -2, "\t-h         : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sat3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManSat3Call( Gia_Man_t * p, int fSplit );
    int c, fSplit = 0, fIncrem = 0;

    satoko_opts_t opts;
    satoko_default_opts(&opts);
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Csivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            opts.conf_limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( opts.conf_limit < 0 )
                goto usage;
            break;
        case 's':
            fSplit ^= 1;
            break;
        case 'i':
            fIncrem ^= 1;
            break;
        case 'v':
            opts.verbose ^= 1;
            break;
        case 'h':
            goto usage;

        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Sat3(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManSat3Call( pAbc->pGia, fSplit );
    return 0;

usage:
    Abc_Print( -2, "usage: &sat3 [-C num] [-sivh]\n" );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n", opts.conf_limit );
    Abc_Print( -2, "\t-s     : split multi-output miter into individual outputs [default = %s]\n", fSplit? "yes": "no" );
    Abc_Print( -2, "\t-i     : split multi-output miter and solve incrementally [default = %s]\n", fIncrem? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", opts.verbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Kissat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Mf_ManDumpCnf( Gia_Man_t * p, char * pFileName, int nLutSize, int fCnfObjIds, int fAddOrCla, int fVerbose );
    extern void Gia_ManKissatCall( Abc_Frame_t * pAbc, char * pFileName, char * pArgs, int nConfs, int nTimeLimit, int fSat, int fUnsat, int fPrintCex, int fVerbose );
    int c, nConfs = 0, nTimeLimit = 0, fSat = 0, fUnsat = 0, fPrintCex = 0, fVerbose = 0;
    char * pArgs = NULL;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CTAsucvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfs < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeLimit < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a file name.\n" );
                goto usage;
            }
            pArgs = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 's':
            fSat ^= 1;
            break;
        case 'u':
            fUnsat ^= 1;
            break;
        case 'c':
            fPrintCex ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;

        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
    {
        Gia_ManKissatCall( pAbc, argv[globalUtilOptind], pArgs, nConfs, nTimeLimit, fSat, fUnsat, fPrintCex, fVerbose );
        return 0;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Satoko(): There is no AIG.\n" );
        return 1;
    }
    else
    {
        int nLutSize    = 8;
        int fCnfObjIds  = 0;
        int fAddOrCla   = 1;
        char * pFileName = "_temp_.cnf";
        Mf_ManDumpCnf( pAbc->pGia, pFileName, nLutSize, fCnfObjIds, fAddOrCla, fVerbose );
        Gia_ManKissatCall( pAbc, pFileName, pArgs, nConfs, nTimeLimit, fSat, fUnsat, fPrintCex, fVerbose );
        unlink( pFileName );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &kissat [-CT num] [-sucvh] [-A string] <file.cnf>\n" );
    Abc_Print( -2, "\t             run SAT solver Kissat, by Armin Biere (https://github.com/arminbiere/kissat)\n" );
    Abc_Print( -2, "\t-C num     : limit on the number of conflicts [default = %d]\n", nConfs );
    Abc_Print( -2, "\t-T num     : runtime limit in seconds [default = %d]\n", nTimeLimit );
    Abc_Print( -2, "\t-s         : expect a satisfiable problem [default = %s]\n", fSat ? "yes": "no" );
    Abc_Print( -2, "\t-u         : expect an unsatisfiable problem [default = %s]\n", fUnsat ? "yes": "no" );
    Abc_Print( -2, "\t-c         : prints satisfying assignment if satisfiable [default = %s]\n", fPrintCex ? "yes": "no" );
    Abc_Print( -2, "\t-v         : prints verbose information [default = %s]\n", fVerbose ? "yes": "no" );
    Abc_Print( -2, "\t-A num     : string containing additional command-line args for the Kissat binary [default = %s]\n", pArgs ? pArgs : "unused" );
    Abc_Print( -2, "\t             (in particular, <&kissat -A \"--help\"> prints all command-line args of Kissat)\n" );
    Abc_Print( -2, "\t<file.cnf> : (optional) CNF file to solve\n");
    Abc_Print( -2, "\t-h         : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPSat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int RetValue;
    int c;
    int nAlgo;
    int nPartSize;
    int nConfPart;
    int nConfTotal;
    int fAlignPol;
    int fSynthesize;
    int fVerbose;
    abctime clk;

    extern int Abc_NtkPartitionedSat( Abc_Ntk_t * pNtk, int nAlgo, int nPartSize, int nConfPart, int nConfTotal, int fAlignPol, int fSynthesize, int fVerbose );
    // set defaults
    nAlgo       =        0;
    nPartSize   =    10000;
    nConfPart   =        0;
    nConfTotal  =  1000000;
    fAlignPol   =        1;
    fSynthesize =        0;
    fVerbose    =        1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "APCpsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            nAlgo = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nAlgo < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPartSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPartSize < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfTotal = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfTotal < 0 )
                goto usage;
            break;
        case 'p':
            fAlignPol ^= 1;
            break;
        case 's':
            fSynthesize ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Currently can only solve the miter for combinational circuits.\n" );
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }

    clk = Abc_Clock();
    RetValue = Abc_NtkPartitionedSat( pNtk, nAlgo, nPartSize, nConfPart, nConfTotal, fAlignPol, fSynthesize, fVerbose );
    // verify that the pattern is correct
    if ( RetValue == 0 && Abc_NtkPoNum(pNtk) == 1 )
    {
        //int i;
        //Abc_Obj_t * pObj;
        int * pSimInfo = Abc_NtkVerifySimulatePattern( pNtk, pNtk->pModel );
        if ( pSimInfo[0] != 1 )
            Abc_Print( 1, "ERROR in Abc_NtkMiterSat(): Generated counter example is invalid.\n" );
        ABC_FREE( pSimInfo );
        /*
        // print model
        Abc_NtkForEachPi( pNtk, pObj, i )
        {
            Abc_Print( -1, "%d", (int)(pNtk->pModel[i] > 0) );
            if ( i == 70 )
                break;
        }
        Abc_Print( -1, "\n" );
        */
    }

    if ( RetValue == -1 )
        Abc_Print( 1, "UNDECIDED      " );
    else if ( RetValue == 0 )
        Abc_Print( 1, "SATISFIABLE    " );
    else
        Abc_Print( 1, "UNSATISFIABLE  " );
    //Abc_Print( -1, "\n" );
    Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
    return 0;

usage:
    Abc_Print( -2, "usage: psat [-APC num] [-psvh]\n" );
    Abc_Print( -2, "\t         solves the combinational miter using partitioning\n" );
    Abc_Print( -2, "\t         (derives CNF from the current network and leave it unchanged)\n" );
    Abc_Print( -2, "\t         for multi-output miters, tries to prove that the AND of POs is always 0\n" );
    Abc_Print( -2, "\t         (if POs should be ORed instead of ANDed, use command \"orpos\")\n" );
    Abc_Print( -2, "\t-A num : partitioning algorithm [default = %d]\n", nAlgo );
    Abc_Print( -2, "\t         0 : no partitioning\n" );
    Abc_Print( -2, "\t         1 : partitioning by level\n" );
    Abc_Print( -2, "\t         2 : DFS post-order\n" );
    Abc_Print( -2, "\t         3 : DFS pre-order\n" );
    Abc_Print( -2, "\t         4 : bit-slicing\n" );
    Abc_Print( -2, "\t         partitions are ordered by level (high level first)\n" );
    Abc_Print( -2, "\t-P num : limit on the partition size [default = %d]\n", nPartSize );
    Abc_Print( -2, "\t-C num : limit on the number of conflicts [default = %d]\n", nConfTotal );
    Abc_Print( -2, "\t-p     : align polarity of SAT variables [default = %s]\n", fAlignPol? "yes": "no" );
    Abc_Print( -2, "\t-s     : apply logic synthesis to each partition [default = %s]\n", fSynthesize? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandProve( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkTemp;
    Prove_Params_t Params, * pParams = &Params;
    int c, RetValue;
    abctime clk;

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    Prove_ParamsSetDefault( pParams );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NCFGLIrfbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nItersMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nItersMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nMiteringLimitStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nMiteringLimitStart < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nFraigingLimitStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nFraigingLimitStart < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nFraigingLimitMulti = (float)atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nFraigingLimitMulti < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nMiteringLimitLast = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nMiteringLimitLast < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pParams->nTotalInspectLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pParams->nTotalInspectLimit < 0 )
                goto usage;
            break;
        case 'r':
            pParams->fUseRewriting ^= 1;
            break;
        case 'f':
            pParams->fUseFraiging ^= 1;
            break;
        case 'b':
            pParams->fUseBdds ^= 1;
            break;
        case 'v':
            pParams->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkLatchNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Currently can only solve the miter for combinational circuits.\n" );
        return 0;
    }
    if ( Abc_NtkCoNum(pNtk) != 1 )
    {
        Abc_Print( -1, "Currently can only solve the miter with one output.\n" );
        return 0;
    }
    clk = Abc_Clock();

    if ( Abc_NtkIsStrash(pNtk) )
        pNtkTemp = Abc_NtkDup( pNtk );
    else
        pNtkTemp = Abc_NtkStrash( pNtk, 0, 0, 0 );

    RetValue = Abc_NtkMiterProve( &pNtkTemp, pParams );

    // verify that the pattern is correct
    if ( RetValue == 0 )
    {
        int * pSimInfo = Abc_NtkVerifySimulatePattern( pNtk, pNtkTemp->pModel );
        if ( pSimInfo[0] != 1 )
            Abc_Print( 1, "ERROR in Abc_NtkMiterProve(): Generated counter-example is invalid.\n" );
        ABC_FREE( pSimInfo );
    }
    pAbc->Status = RetValue;
    if ( RetValue == -1 )
        Abc_Print( 1, "UNDECIDED      " );
    else if ( RetValue == 0 )
        Abc_Print( 1, "SATISFIABLE    " );
    else
        Abc_Print( 1, "UNSATISFIABLE  " );
    //Abc_Print( -1, "\n" );

    Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: prove [-NCFGLI num] [-rfbvh]\n" );
    Abc_Print( -2, "\t         solves combinational miter by rewriting, FRAIGing, and SAT\n" );
    Abc_Print( -2, "\t         replaces the current network by the cone modified by rewriting\n" );
    Abc_Print( -2, "\t         (there is also newer CEC command \"iprove\")\n" );
    Abc_Print( -2, "\t-N num : max number of iterations [default = %d]\n", pParams->nItersMax );
    Abc_Print( -2, "\t-C num : max starting number of conflicts in mitering [default = %d]\n", pParams->nMiteringLimitStart );
    Abc_Print( -2, "\t-F num : max starting number of conflicts in fraiging [default = %d]\n", pParams->nFraigingLimitStart );
    Abc_Print( -2, "\t-G num : multiplicative coefficient for fraiging [default = %d]\n", (int)pParams->nFraigingLimitMulti );
    Abc_Print( -2, "\t-L num : max last-gasp number of conflicts in mitering [default = %d]\n", pParams->nMiteringLimitLast );
    Abc_Print( -2, "\t-I num : max number of clause inspections in all SAT calls [default = %d]\n", (int)pParams->nTotalInspectLimit );
    Abc_Print( -2, "\t-r     : toggle the use of rewriting [default = %s]\n", pParams->fUseRewriting? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle the use of FRAIGing [default = %s]\n", pParams->fUseFraiging? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle the use of BDDs [default = %s]\n", pParams->fUseBdds? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", pParams->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDebug( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    extern void Abc_NtkAutoDebug( Abc_Ntk_t * pNtk, int (*pFuncError) (Abc_Ntk_t *) );
    extern int Abc_NtkRetimeDebug( Abc_Ntk_t * pNtk );
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsLogic(pNtk) )
    {
        Abc_Print( -1, "This command is applicable to logic networks.\n" );
        return 1;
    }

    Abc_NtkAutoDebug( pNtk, Abc_NtkRetimeDebug );
    return 0;

usage:
    Abc_Print( -2, "usage: debug [-h]\n" );
    Abc_Print( -2, "\t        performs automated debugging of the given procedure\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandEco( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc_NtkEco( char * pFileNames[3] );
    char * pFileNames[3] = {NULL};  int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( globalUtilOptind + 3 != argc )
    {
        Abc_Print( -1, "Expecting three file names on the command line.\n" );
        return 1;
    }
    for ( c = 0; c < 3; c++ )
        pFileNames[c] = argv[globalUtilOptind+c];
    Abc_NtkEco( pFileNames );
    return 0;

usage:
    Abc_Print( -2, "usage: eco [-h]\n" );
    Abc_Print( -2, "\t        performs experimental ECO computation\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBmc( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nFrames;
    int nSizeMax;
    int nBTLimit;
    int nBTLimitAll;
    int nNodeDelta;
    int fRewrite;
    int fNewAlgo;
    int nCofFanLit;
    int fVerbose;
    int iFrames;
    int fUseSatoko;
    char * pLogFileName = NULL;

    extern int Abc_NtkDarBmc( Abc_Ntk_t * pNtk, int nStart, int nFrames, int nSizeMax, int nNodeDelta, int nTimeOut, int nBTLimit, int nBTLimitAll, int fRewrite, int fNewAlgo, int fOrDecomp, int nCofFanLit, int fVerbose, int * piFrames, int fUseSatoko );
    // set defaults
    nFrames     =       20;
    nSizeMax    =   100000;
    nBTLimit    =        0;
    nBTLimitAll =        0;
    nNodeDelta  =     1000;
    fRewrite    =        0;
    fNewAlgo    =        1;
    nCofFanLit  =        0;
    fVerbose    =        0;
    fUseSatoko  =        0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FNCGDLrsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSizeMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimit < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimitAll = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimitAll < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodeDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodeDelta < 0 )
                goto usage;
            break;
/*
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nCofFanLit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCofFanLit < 0 )
                goto usage;
            break;
*/
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            fRewrite ^= 1;
            break;
        case 'a':
            fNewAlgo ^= 1;
            break;
        case 's':
            fUseSatoko ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "Does not work for combinational networks.\n" );
        return 0;
    }
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }
    pAbc->Status = Abc_NtkDarBmc( pNtk, 0, nFrames, nSizeMax, nNodeDelta, 0, nBTLimit, nBTLimitAll, fRewrite, fNewAlgo, 0, nCofFanLit, fVerbose, &iFrames, fUseSatoko );
    pAbc->nFrames = iFrames;
    Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "bmc" );
    return 0;

usage:
    Abc_Print( -2, "usage: bmc [-FNC num] [-L file] [-rcsvh]\n" );
    Abc_Print( -2, "\t         performs bounded model checking with static unrolling\n" );
    Abc_Print( -2, "\t-F num : the number of time frames [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-N num : the max number of nodes in the frames [default = %d]\n", nSizeMax );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nBTLimit );
//    Abc_Print( -2, "\t-L num : the limit on fanout count of resets/enables to cofactor [default = %d]\n", nCofFanLit );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-r     : toggle the use of rewriting [default = %s]\n", fRewrite? "yes": "no" );
//    Abc_Print( -2, "\t-a     : toggle SAT sweeping and SAT solving [default = %s]\n", fNewAlgo? "SAT solving": "SAT sweeping" );
    Abc_Print( -2, "\t-s     : toggle using Satoko by Bruno Schmitt [default = %s]\n", fUseSatoko? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBmc2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    int nStart;
    int nFrames;
    int nSizeMax;
    int nBTLimit;
    int nBTLimitAll;
    int nNodeDelta;
    int nTimeOut;
    int fRewrite;
    int fNewAlgo;
    int fOrDecomp;
    int fVerbose;
    int iFrames;
    int fUseSatoko;
    char * pLogFileName = NULL;

    extern int Abc_NtkDarBmc( Abc_Ntk_t * pNtk, int nStart, int nFrames, int nSizeMax, int nNodeDelta, int nTimeOut, int nBTLimit, int nBTLimitAll, int fRewrite, int fNewAlgo, int fOrDecomp, int nCofFanLit, int fVerbose, int * piFrames, int fUseSatoko );

    // set defaults
    nStart      =        0;
    nFrames     =        0;
    nSizeMax    =   200000;
    nBTLimit    =        0;
    nBTLimitAll =        0;
    nNodeDelta  =     2000;
    nTimeOut    =        0;
    fRewrite    =        0;
    fNewAlgo    =        0;
    fOrDecomp   =        0;
    fVerbose    =        0;
    fUseSatoko  =        0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "SFNTCGDLrusvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nStart < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSizeMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimit < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimitAll = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimitAll < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodeDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodeDelta < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            fRewrite ^= 1;
            break;
        case 'a':
            fNewAlgo ^= 1;
            break;
        case 'u':
            fOrDecomp ^= 1;
            break;
        case 's':
            fUseSatoko ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "Does not work for combinational networks.\n" );
        return 0;
    }
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }
    pAbc->Status = Abc_NtkDarBmc( pNtk, nStart, nFrames, nSizeMax, nNodeDelta, nTimeOut, nBTLimit, nBTLimitAll, fRewrite, fNewAlgo, fOrDecomp, 0, fVerbose, &iFrames, fUseSatoko );
    pAbc->nFrames = iFrames;
    Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "bmc2" );
    return 0;

usage:
    Abc_Print( -2, "usage: bmc2 [-SFTCGD num] [-L file] [-usvh]\n" );
    Abc_Print( -2, "\t         performs bounded model checking with dynamic unrolling\n" );
    Abc_Print( -2, "\t-S num : the starting time frame [default = %d]\n", nStart );
    Abc_Print( -2, "\t-F num : the max number of time frames (0 = unused) [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-G num : the max number of conflicts globally [default = %d]\n", nBTLimitAll );
    Abc_Print( -2, "\t-D num : the delta in the number of nodes [default = %d]\n", nNodeDelta );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-u     : toggle performing structural OR-decomposition [default = %s]\n", fOrDecomp? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle using Satoko by Bruno Schmitt [default = %s]\n", fUseSatoko? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBmc3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_NtkDarBmc3( Abc_Ntk_t * pNtk, Saig_ParBmc_t * pPars, int fOrDecomp );
    Saig_ParBmc_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtkRes, * pNtk = Abc_FrameReadNtk(pAbc);
    Vec_Ptr_t * vSeqModelVec = NULL;
    Vec_Int_t * vStatuses = NULL;
    char * pLogFileName = NULL;
    int fOrDecomp = 0;
    int c;
    Saig_ParBmcSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "SFTHGCDJIPQRLWaxdursgvzh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nStart < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'H':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-H\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOutOne = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOutOne < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOutGap = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOutGap < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfLimit < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfLimitJump = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfLimitJump < 0 )
                goto usage;
            break;
        case 'J':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-J\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesJump = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesJump < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nPisAbstract = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nPisAbstract < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedStart < 0 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedDelta < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedPerce = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedPerce < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a file name.\n" );
                goto usage;
            }
            pPars->pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'a':
            pPars->fSolveAll ^= 1;
            break;
        case 'x':
            pPars->fStoreCex ^= 1;
            break;
        case 'd':
            pPars->fDropSatOuts ^= 1;
            break;
        case 'u':
            fOrDecomp ^= 1;
            break;
        case 'r':
            pPars->fNoRestarts ^= 1;
            break;
        case 's':
            pPars->fUseSatoko ^= 1;
            break;
        case 'g':
            pPars->fUseGlucose ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'z':
            pPars->fNotVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "Does not work for combinational networks.\n" );
        return 0;
    }
    if ( Abc_NtkConstrNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Constraints have to be folded (use \"fold\").\n" );
        return 0;
    }
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }
    pPars->fUseBridge = pAbc->fBridgeMode;
    pAbc->Status = Abc_NtkDarBmc3( pNtk, pPars, fOrDecomp );
    pAbc->nFrames = pNtk->vSeqModelVec ? -1 : pPars->iFrame;
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "bmc3" );
    vSeqModelVec = pNtk->vSeqModelVec;  pNtk->vSeqModelVec = NULL;
    if ( pPars->fSolveAll && pPars->fDropSatOuts )
    {
        if ( vSeqModelVec == NULL )
            Abc_Print( 1,"The array of counter-examples is not available.\n" );
        else if ( Vec_PtrSize(vSeqModelVec) != Abc_NtkPoNum(pNtk) )
            Abc_Print( 1,"The array size does not match the number of outputs.\n" );
        else
        {
            extern void Abc_NtkDropSatOutputs( Abc_Ntk_t * pNtk, Vec_Ptr_t * vCexes, int fVerbose );
            Abc_NtkDropSatOutputs( pNtk, vSeqModelVec, pPars->fVerbose );
            pNtkRes = Abc_NtkDarLatchSweep( pNtk, 1, 1, 1, 0, -1, -1, 0, 0 );
            if ( pNtkRes == NULL )
            {
                Abc_Print( -1, "Removing SAT outputs has failed.\n" );
                return 1;
            }
            Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        }
    }
    vStatuses = Abc_FrameDeriveStatusArray( vSeqModelVec );
    Abc_FrameReplacePoStatuses( pAbc, &vStatuses );
    if ( vSeqModelVec )
        Abc_FrameReplaceCexVec( pAbc, &vSeqModelVec );
    else
        Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    return 0;

usage:
    Abc_Print( -2, "usage: bmc3 [-SFTHGCDJIPQR num] [-LW file] [-axdursgvzh]\n" );
    Abc_Print( -2, "\t         performs bounded model checking with dynamic unrolling\n" );
    Abc_Print( -2, "\t-S num : the starting time frame [default = %d]\n", pPars->nStart );
    Abc_Print( -2, "\t-F num : the max number of time frames (0 = unused) [default = %d]\n",      pPars->nFramesMax );
    Abc_Print( -2, "\t-T num : runtime limit, in seconds [default = %d]\n",                       pPars->nTimeOut );
    Abc_Print( -2, "\t-H num : runtime limit per output, in miliseconds (with \"-a\") [default = %d]\n",    pPars->nTimeOutOne );
    Abc_Print( -2, "\t-G num : runtime gap since the last CEX, in seconds [default = %d]\n",      pPars->nTimeOutGap );
    Abc_Print( -2, "\t-C num : max conflicts at an output [default = %d]\n",                      pPars->nConfLimit );
    Abc_Print( -2, "\t-D num : max conflicts after jumping (0 = infinity) [default = %d]\n",      pPars->nConfLimitJump );
    Abc_Print( -2, "\t-J num : the number of timeframes to jump (0 = not used) [default = %d]\n", pPars->nFramesJump );
    Abc_Print( -2, "\t-I num : the number of PIs to abstract [default = %d]\n",                   pPars->nPisAbstract );
    Abc_Print( -2, "\t-P num : the max number of learned clauses to keep (0=unused) [default = %d]\n", pPars->nLearnedStart );
    Abc_Print( -2, "\t-Q num : delta value for learned clause removal [default = %d]\n",          pPars->nLearnedDelta );
    Abc_Print( -2, "\t-R num : percentage to keep for learned clause removal [default = %d]\n",   pPars->nLearnedPerce );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n",                               pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-W file: the log file name with per-output details [default = %s]\n",       pPars->pLogFileName ? pPars->pLogFileName : "no logging" );
    Abc_Print( -2, "\t-a     : solve all outputs (do not stop when one is SAT) [default = %s]\n", pPars->fSolveAll? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle storing CEXes when solving all outputs [default = %s]\n",   pPars->fStoreCex? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle dropping (replacing by 0) SAT outputs [default = %s]\n",    pPars->fDropSatOuts? "yes": "no" );
    Abc_Print( -2, "\t-u     : toggle performing structural OR-decomposition [default = %s]\n",   fOrDecomp? "yes": "not" );
    Abc_Print( -2, "\t-r     : toggle disabling periodic restarts [default = %s]\n",              pPars->fNoRestarts? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle using Satoko by Bruno Schmitt [default = %s]\n", pPars->fUseSatoko? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle using Glucose 3.0 by Gilles Audemard and Laurent Simon [default = %s]\n",pPars->fUseGlucose? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n",                           pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle suppressing report about solved outputs [default = %s]\n",  pPars->fNotVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBmcInter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Inter_ManParams_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtkRes, * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    char * pLogFileName = NULL;

    extern int Abc_NtkDarBmcInter( Abc_Ntk_t * pNtk, Inter_ManParams_t * pPars, Abc_Ntk_t ** ppNtkRes );
    // set defaults
    Inter_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CFTKLIrtpomcgbqkdivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSecLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSecLimit < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesK = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesK < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a file name.\n" );
                goto usage;
            }
            pPars->pFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            pPars->fRewrite ^= 1;
            break;
        case 't':
            pPars->fTransLoop ^= 1;
            break;
        case 'p':
            pPars->fUsePudlak ^= 1;
            break;
        case 'o':
            pPars->fUseOther ^= 1;
            break;
        case 'm':
            pPars->fUseMiniSat ^= 1;
            break;
        case 'c':
            pPars->fCheckKstep ^= 1;
            break;
        case 'g':
            pPars->fUseBias ^= 1;
            break;
        case 'b':
            pPars->fUseBackward ^= 1;
            break;
        case 'q':
            pPars->fUseTwoFrames ^= 1;
            break;
        case 'k':
            pPars->fUseSeparate ^= 1;
            break;
        case 'd':
            pPars->fDropSatOuts ^= 1;
            break;
        case 'i':
            pPars->fDropInvar ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( -1, "Does not work for combinational networks.\n" );
        return 0;
    }
    if ( Abc_NtkConstrNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Cannot run interpolation with constraints. Use \"fold\".\n" );
        return 0;
    }
    if ( Abc_NtkPoNum(pNtk)-Abc_NtkConstrNum(pNtk) != 1 )
    {
        if ( Abc_NtkConstrNum(pNtk) > 0 )
        {
            Abc_Print( 1,"Cannot solve multiple-output miter with constraints.\n" );
            return 0;
        }
        if ( pPars->fUseSeparate )
        {
            Abc_Print( 0, "Each of %d outputs will be solved separately.\n", Abc_NtkPoNum(pNtk) );
            pAbc->Status = Abc_NtkDarBmcInter( pNtk, pPars, &pNtkRes );
            Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
            if ( pNtkRes == NULL )
            {
                Abc_Print( -1, "Generating resulting network has failed.\n" );
                return 0;
            }
            Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        }
        else
        {
            Abc_Ntk_t * pNtkNew = Abc_NtkDup( pNtk );
            Abc_Print( 0, "All %d outputs will be ORed together.\n", Abc_NtkPoNum(pNtk) );
            if ( !Abc_NtkCombinePos( pNtkNew, 0, 0 ) )
            {
                Abc_NtkDelete( pNtkNew );
                Abc_Print( -1, "ORing outputs has failed.\n" );
                return 0;
            }
            pAbc->Status = Abc_NtkDarBmcInter( pNtkNew, pPars, NULL );
            if ( pAbc->Status == 0 )
            {
                Aig_Man_t * pMan = Abc_NtkToDar( pNtk, 0, 1 );
                pNtkNew->pSeqModel->iPo = Saig_ManFindFailedPoCex( pMan, pNtkNew->pSeqModel );
                Aig_ManStop( pMan );
            }
            Abc_FrameReplaceCex( pAbc, &pNtkNew->pSeqModel );
            Abc_NtkDelete( pNtkNew );
        }
        pAbc->nFrames = -1;
    }
    else
    {
        pAbc->Status  = Abc_NtkDarBmcInter( pNtk, pPars, NULL );
        pAbc->nFrames = pPars->iFrameMax;
        Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
    }
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "int" );
    return 0;

usage:
    Abc_Print( -2, "usage: int [-CFTK num] [-LI file] [-irtpomcgbqkdvh]\n" );
    Abc_Print( -2, "\t         uses interpolation to prove the property\n" );
    Abc_Print( -2, "\t-C num : the limit on conflicts for one SAT run [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-F num : the limit on number of frames to unroll [default = %d]\n", pPars->nFramesMax );
    Abc_Print( -2, "\t-T num : the limit on runtime per output in seconds [default = %d]\n", pPars->nSecLimit );
    Abc_Print( -2, "\t-K num : the number of steps in inductive checking [default = %d]\n", pPars->nFramesK );
    Abc_Print( -2, "\t         (K = 1 works in all cases; K > 1 works without -t and -b)\n" );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-I file: the file name for dumping interpolant [default = \"%s\"]\n", pPars->pFileName ? pPars->pFileName : "invar.aig" );
    Abc_Print( -2, "\t-i     : toggle dumping interpolant/invariant into a file [default = %s]\n", pPars->fDropInvar? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle rewriting of the unrolled timeframes [default = %s]\n", pPars->fRewrite? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle adding transition into the initial state [default = %s]\n", pPars->fTransLoop? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle using original Pudlak's interpolation procedure [default = %s]\n", pPars->fUsePudlak? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle using optimized Pudlak's interpolation procedure [default = %s]\n", pPars->fUseOther? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle using MiniSat-1.14p (now, Windows-only) [default = %s]\n", pPars->fUseMiniSat? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle using inductive containment check [default = %s]\n", pPars->fCheckKstep? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle using bias for global variables using SAT [default = %s]\n", pPars->fUseBias? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle using backward interpolation (works with -t) [default = %s]\n", pPars->fUseBackward? "yes": "no" );
    Abc_Print( -2, "\t-q     : toggle using property in two last timeframes [default = %s]\n", pPars->fUseTwoFrames? "yes": "no" );
    Abc_Print( -2, "\t-k     : toggle solving each output separately [default = %s]\n", pPars->fUseSeparate? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle dropping (replacing by 0) SAT outputs (with -k is used) [default = %s]\n", pPars->fDropSatOuts? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIndcut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int nFrames;
    int nPref;
    int nClauses;
    int nLutSize;
    int nLevels;
    int nCutsMax;
    int nBatches;
    int fStepUp;
    int fBmc;
    int fRegs;
    int fTarget;
    int fVerbose;
    int fVeryVerbose;
    int c;
    extern int Abc_NtkDarClau( Abc_Ntk_t * pNtk, int nFrames, int nPref, int nClauses, int nLutSize, int nLevels, int nCutsMax, int nBatches, int fStepUp, int fBmc, int fRegs, int fTarget, int fVerbose, int fVeryVerbose );
    // set defaults
    nFrames      =    1;
    nPref        =    0;
    nClauses     = 5000;
    nLutSize     =    4;
    nLevels      =    8;
    nCutsMax     =   16;
    nBatches     =    1;
    fStepUp      =    0;
    fBmc         =    1;
    fRegs        =    1;
    fTarget      =    1;
    fVerbose     =    0;
    fVeryVerbose =    0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FPCMLNBsbrtvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPref = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPref < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nClauses = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nClauses < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevels = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevels < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutsMax < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            nBatches = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBatches < 0 )
                goto usage;
            break;
        case 's':
            fStepUp ^= 1;
            break;
        case 'b':
            fBmc ^= 1;
            break;
        case 'r':
            fRegs ^= 1;
            break;
        case 't':
            fTarget ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( nLutSize > 12 )
    {
        Abc_Print( -1, "The cut size should be not exceed 12.\n" );
        return 0;
    }
    Abc_NtkDarClau( pNtk, nFrames, nPref, nClauses, nLutSize, nLevels, nCutsMax, nBatches, fStepUp, fBmc, fRegs, fTarget, fVerbose, fVeryVerbose );
    return 0;
usage:
    Abc_Print( -2, "usage: indcut [-FPCMLNB num] [-sbrtvh]\n" );
    Abc_Print( -2, "\t         K-step induction strengthened with cut properties\n" );
    Abc_Print( -2, "\t-F num : number of time frames for induction (1=simple) [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-P num : number of time frames in the prefix (0=no prefix) [default = %d]\n", nPref );
    Abc_Print( -2, "\t-C num : the max number of clauses to use for strengthening [default = %d]\n", nClauses );
    Abc_Print( -2, "\t-M num : the cut size (2 <= M <= 12) [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-L num : the max number of levels for cut computation [default = %d]\n", nLevels );
    Abc_Print( -2, "\t-N num : the max number of cuts to compute at a node [default = %d]\n", nCutsMax );
    Abc_Print( -2, "\t-B num : the max number of invariant batches to try [default = %d]\n", nBatches );
    Abc_Print( -2, "\t-s     : toggle increment cut size in each batch [default = %s]\n", fStepUp? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle enabling BMC check [default = %s]\n", fBmc? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle enabling register clauses [default = %s]\n", fRegs? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle proving target / computing don't-cares [default = %s]\n", fTarget? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
//    Abc_Print( -2, "\t-w     : toggle printing very verbose information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandEnlarge( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int nFrames;
    int fVerbose;
    int c;
    extern Abc_Ntk_t * Abc_NtkDarEnlarge( Abc_Ntk_t * pNtk, int nFrames, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nFrames      = 5;
    fVerbose     = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 1 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }

    // modify the current network
    pNtkRes = Abc_NtkDarEnlarge( pNtk, nFrames, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Target enlargement has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;
usage:
    Abc_Print( -2, "usage: enlarge [-F <num>] [-vh]\n" );
    Abc_Print( -2, "\t           performs structural K-step target enlargement\n" );
    Abc_Print( -2, "\t-F <num> : the number of timeframes to unroll (<num> > 0) [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-v       : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTempor( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkDarTempor( Abc_Ntk_t * pNtk, int nFrames, int TimeOut, int nConfLimit, int fUseBmc, int fUseTransSigs, int fVerbose, int fVeryVerbose );
    Abc_Ntk_t * pNtkRes, * pNtk = Abc_FrameReadNtk(pAbc);
    int nFrames       =       0;
    int TimeOut       =     300;
    int nConfMax      =  100000;
    int fUseBmc       =       1;
    int fUseTransSigs =       0;
    int fUpdateCex    =       0;
    int fVerbose      =       0;
    int fVeryVerbose  =       0;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FTCbscvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeOut < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'b':
            fUseBmc ^= 1;
            break;
        case 's':
            fUseTransSigs ^= 1;
            break;
        case 'c':
            fUpdateCex ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -2, "There is no current network.\n");
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -2, "The current network is not an AIG (run \"strash\").\n");
        return 0;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        Abc_Print( 0, "The current network is combinational.\n");
        return 0;
    }
    if ( Abc_NtkPiNum(pNtk) == 0 )
    {
        Abc_Print( 0, "The current network does not have primary inputs. Use \"addpi\".\n");
        return 0;
    }
    if ( fUpdateCex )
    {
        Abc_Cex_t * pCexNew;
        if ( pAbc->pCex == NULL )
        {
            Abc_Print( -1, "Counter-example is not available.\n" );
            return 1;
        }
        if ( pAbc->pCex->nPis % Abc_NtkPiNum(pNtk) != 0 )
        {
            Abc_Print( -1, "PI count of the CEX is not a multiple of PI count of the current AIG.\n" );
            return 1;
        }
        pCexNew = Abc_CexTransformTempor( pAbc->pCex, Abc_NtkPiNum(pNtk), Abc_NtkPoNum(pNtk), Abc_NtkLatchNum(pNtk) );
        Abc_FrameReplaceCex( pAbc, &pCexNew );
        return 0;
    }
    // modify the current network
    pNtkRes = Abc_NtkDarTempor( pNtk, nFrames, TimeOut, nConfMax, fUseBmc, fUseTransSigs, fVerbose, fVeryVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( -1, "Temporal decomposition has failed.\n" );
        return 1;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;

usage:
    Abc_Print( -2, "usage: tempor [-FTC <num>] [-bscvwh]\n" );
    Abc_Print( -2, "\t           performs temporal decomposition\n" );
    Abc_Print( -2, "\t-F <num> : init logic timeframe count (0 = use leading length) [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-T <num> : runtime limit in seconds for BMC (0=unused) [default = %d]\n", TimeOut );
    Abc_Print( -2, "\t-C <num> : max number of SAT conflicts in BMC (0=unused) [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-b       : toggle running BMC2 on the init frames [default = %s]\n", fUseBmc? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggle using transient signals [default = %s]\n", fUseTransSigs? "yes": "no" );
    Abc_Print( -2, "\t-c       : update the current CEX derived for a new AIG after \"tempor\"\n" );
    Abc_Print( -2, "\t           to match the current AIG (the one before \"tempor\") [default = %s]\n", fUpdateCex? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing ternary state space [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandInduction( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int nTimeOut;
    int nFramesMax;
    int nConfMax;
    int fUnique;
    int fUniqueAll;
    int fGetCex;
    int fVerbose;
    int fVeryVerbose;
    int c;
    extern int Abc_NtkDarInduction( Abc_Ntk_t * pNtk, int nTimeOut, int nFramesMax, int nConfMax, int fUnique, int fUniqueAll, int fGetCex, int fVerbose, int fVeryVerbose );
    // set defaults
    nTimeOut     =     0;
    nFramesMax   =     0;
    nConfMax     =     0;
    fUnique      =     0;
    fUniqueAll   =     0;
    fGetCex      =     0;
    fVerbose     =     0;
    fVeryVerbose =     0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCTuaxvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFramesMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 'u':
            fUnique ^= 1;
            break;
        case 'a':
            fUniqueAll ^= 1;
            break;
        case 'x':
            fGetCex ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( Abc_NtkPoNum(pNtk) != 1 )
    {
        Abc_Print( -1, "Currently this command works only for single-output miter.\n" );
        return 0;
    }
    if ( fUnique && fUniqueAll )
    {
        Abc_Print( -1, "Only one of the options, \"-u\" or \"-a\", should be selected.\n" );
        return 0;
    }

    // modify the current network
    pAbc->Status = Abc_NtkDarInduction( pNtk, nTimeOut, nFramesMax, nConfMax, fUnique, fUniqueAll, fGetCex, fVerbose, fVeryVerbose );
    if ( fGetCex )
    {
        Abc_FrameReplaceCex( pAbc, &pNtk->pSeqModel );
        Abc_Print( 1,"The current CEX in ABC is set to be the CEX to induction.\n" );
    }
    return 0;
usage:
    Abc_Print( -2, "usage: ind [-FCT num] [-uaxvwh]\n" );
    Abc_Print( -2, "\t         runs the inductive case of the K-step induction\n" );
    Abc_Print( -2, "\t-F num : the max number of timeframes [default = %d]\n", nFramesMax );
    Abc_Print( -2, "\t-C num : the max number of conflicts by SAT solver [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-T num : the limit on runtime per output in seconds [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-u     : toggle adding uniqueness constraints on demand [default = %s]\n", fUnique? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle adding uniqueness constraints always [default = %s]\n", fUniqueAll? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle returning CEX to induction for the top frame [default = %s]\n", fGetCex? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing additional verbose information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandConstr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk;
    int c;
    int nFrames;
    int nConfs;
    int nProps;
    int fRemove;
    int fStruct;
    int fInvert;
    int fOldAlgo;
    int fVerbose;
    int nConstrs;
    extern void Abc_NtkDarConstr( Abc_Ntk_t * pNtk, int nFrames, int nConfs, int nProps, int fStruct, int fOldAlgo, int fVerbose );

    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nFrames   =      1;
    nConfs    =   1000;
    nProps    =   1000;
    fRemove   =      0;
    fStruct   =      0;
    fInvert   =      0;
    fOldAlgo  =      0;
    fVerbose  =      0;
    nConstrs  =     -1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCPNrsiavh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfs < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nProps = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nProps < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nConstrs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConstrs < 0 )
                goto usage;
            break;
        case 'r':
            fRemove ^= 1;
            break;
        case 's':
            fStruct ^= 1;
            break;
        case 'i':
            fInvert ^= 1;
            break;
        case 'a':
            fOldAlgo ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( fRemove )
    {
        if ( Abc_NtkConstrNum(pNtk) == 0 )
        {
            Abc_Print( -1, "Constraints are not defined.\n" );
            return 0;
        }
        Abc_Print( 1, "Constraints are converted to be primary outputs.\n" );
        pNtk->nConstrs = 0;
        return 0;
    }
    // consider the case of manual constraint definition
    if ( nConstrs >= 0 )
    {
        if ( Abc_NtkIsComb(pNtk) )
            Abc_Print( 0, "The network is combinational.\n" );
        if ( Abc_NtkConstrNum(pNtk) > 0 )
            Abc_Print( 0, "The network currently has %d constraints.\n", Abc_NtkConstrNum(pNtk) );
        if ( nConstrs >= Abc_NtkPoNum(pNtk) )
        {
            Abc_Print( -1, "The number of constraints specified (%d) should be less than POs (%d).\n", nConstrs, Abc_NtkPoNum(pNtk) );
            return 0;
        }
        Abc_Print( 1, "Setting the last %d POs as constraint outputs.\n", nConstrs );
        pNtk->nConstrs = nConstrs;
        return 0;
    }
    // consider the case of already defined constraints
    if ( Abc_NtkConstrNum(pNtk) > 0 )
    {
        extern void Abc_NtkDarConstrProfile( Abc_Ntk_t * pNtk, int fVerbose );
        if ( fInvert )
        {
            Abc_NtkInvertConstraints( pNtk );
            if ( Abc_NtkConstrNum(pNtk) == 1 )
                Abc_Print( 1, "The output of %d constraint is complemented.\n", Abc_NtkConstrNum(pNtk) );
            else
                Abc_Print( 1, "The outputs of %d constraints are complemented.\n", Abc_NtkConstrNum(pNtk) );
        }
        if ( fVerbose )
            Abc_NtkDarConstrProfile( pNtk, fVerbose );
        return 0;
    }
    if ( Abc_NtkIsComb(pNtk) )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    // detect constraints using functional/structural methods
    Abc_NtkDarConstr( pNtk, nFrames, nConfs, nProps, fStruct, fOldAlgo, fVerbose );
    return 0;
usage:
    Abc_Print( -2, "usage: constr [-FCPN num] [-risavh]\n" );
    Abc_Print( -2, "\t         a toolkit for constraint manipulation\n" );
    Abc_Print( -2, "\t         if constraints are absent, detect them functionally\n" );
    Abc_Print( -2, "\t         if constraints are present, profiles them using random simulation\n" );
    Abc_Print( -2, "\t         (constraints fail when any of them becomes 1 in any timeframe)\n" );
    Abc_Print( -2, "\t-F num : the max number of timeframes to consider [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-C num : the max number of conflicts in SAT solving [default = %d]\n", nConfs );
    Abc_Print( -2, "\t-P num : the max number of propagations in SAT solving [default = %d]\n", nProps );
    Abc_Print( -2, "\t-N num : manually set the last <num> POs to be constraints [default = %d]\n", nConstrs );
    Abc_Print( -2, "\t-r     : manually remove the constraints [default = %s]\n", fRemove? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggle inverting already defined constraints [default = %s]\n", fInvert? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle using structural detection methods [default = %s]\n", fStruct? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle fast implication detection [default = %s]\n", !fOldAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandUnfold( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int nFrames;
    int nConfs;
    int nProps;
    int fStruct;
    int fOldAlgo;
    int fVerbose;
    int c;
    extern Abc_Ntk_t * Abc_NtkDarUnfold( Abc_Ntk_t * pNtk, int nFrames, int nConfs, int nProps, int fStruct, int fOldAlgo, int fVerbose );
    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    nFrames   =      1;
    nConfs    =   1000;
    nProps    =   1000;
    fStruct   =      0;
    fOldAlgo  =      0;
    fVerbose  =      0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCPsavh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfs < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nProps = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nProps < 0 )
                goto usage;
            break;
        case 's':
            fStruct ^= 1;
            break;
        case 'a':
            fOldAlgo ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( Abc_NtkIsComb(pNtk) && Abc_NtkPoNum(pNtk) > 1 )
    {
        Abc_Print( -1, "Combinational miter has more than one PO.\n" );
        return 0;
    }
    if ( Abc_NtkIsComb(pNtk) )
    {
        extern Gia_Man_t * Gia_ManDupWithConstr( Gia_Man_t * p );
        Gia_Man_t * pNew;
        Aig_Man_t * pAig = Abc_NtkToDar( pNtk, 0, 0 );
        Gia_Man_t * pGia = Gia_ManFromAigSimple( pAig );
        Aig_ManStop( pAig );
        pNew = Gia_ManDupWithConstr( pGia );
        Gia_ManStop( pGia );
        if ( pNew == NULL )
        {
            Abc_Print( -1, "Cannot extract constrains from the miter.\n" );
            return 0;
        }
        pAig = Gia_ManToAigSimple( pNew );
        Gia_ManStop( pNew );
        pNtkRes = Abc_NtkFromAigPhase( pAig );
        Aig_ManStop( pAig );
        ABC_FREE( pNtkRes->pName );
        pNtkRes->pName = Extra_UtilStrsav( pNtk->pName );
        // replace the current network
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( Abc_NtkConstrNum(pNtk) > 0 )
    {
        Abc_Print( -1, "Constraints are already extracted.\n" );
        return 0;
    }
    if ( Abc_NtkPoNum(pNtk) > 1 && !fStruct )
    {
        Abc_Print( -1, "Functional constraint extraction works for single-output miters (use \"orpos\").\n" );
        return 0;
    }
    // modify the current network
    pNtkRes = Abc_NtkDarUnfold( pNtk, nFrames, nConfs, nProps, fStruct, fOldAlgo, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( 1,"Transformation has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;
usage:
    Abc_Print( -2, "usage: unfold [-FCP num] [-savh]\n" );
    Abc_Print( -2, "\t         unfold hidden constraints as separate outputs\n" );
    Abc_Print( -2, "\t-F num : the max number of timeframes to consider [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-C num : the max number of conflicts in SAT solving [default = %d]\n", nConfs );
    Abc_Print( -2, "\t-P num : the max number of constraint propagations [default = %d]\n", nProps );
    Abc_Print( -2, "\t-s     : toggle detecting structural constraints [default = %s]\n", fStruct? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle fast implication detection [default = %s]\n", !fOldAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandFold( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkRes;
    int fCompl;
    int fVerbose;
    int c;
    extern Abc_Ntk_t * Abc_NtkDarFold( Abc_Ntk_t * pNtk, int fCompl, int fVerbose );
    pNtk = Abc_FrameReadNtk(pAbc);
    // set defaults
    fCompl    =   0;
    fVerbose  =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "cvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fCompl ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "Currently only works for structurally hashed circuits.\n" );
        return 0;
    }
    if ( Abc_NtkConstrNum(pNtk) == 0 )
    {
        Abc_Print( 0, "The network has no constraints.\n" );
        return 0;
    }
    if ( Abc_NtkConstrNum(pNtk) == Abc_NtkPoNum(pNtk) )
    {
        Abc_Print( 0, "The network has no primary outputs (only constraints).\n" );
        return 0;
    }
    if ( Abc_NtkIsComb(pNtk) )
        Abc_Print( 0, "The network is combinational.\n" );
    // modify the current network
    pNtkRes = Abc_NtkDarFold( pNtk, fCompl, fVerbose );
    if ( pNtkRes == NULL )
    {
        Abc_Print( 1,"Transformation has failed.\n" );
        return 0;
    }
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
    return 0;
usage:
    Abc_Print( -2, "usage: fold [-cvh]\n" );
    Abc_Print( -2, "\t         folds constraints represented as separate outputs\n" );
    Abc_Print( -2, "\t         (constraints fail when any of them becomes 1 in any timeframe)\n" );
    Abc_Print( -2, "\t-c     : toggle complementing constraints while folding [default = %s]\n", fCompl? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBm( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pOut, * pErr;
    Abc_Ntk_t *pNtk, *pNtk1, *pNtk2;
    int fDelete1, fDelete2;
    char ** pArgvNew;
    int c, nArgcNew;
    int p_equivalence = FALSE;
    extern void bmGateWay( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int p_equivalence );

    pNtk = Abc_FrameReadNtk(pAbc);
    pOut = Abc_FrameReadOut(pAbc);
    pErr = Abc_FrameReadErr(pAbc);

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ph" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        case 'P':
            p_equivalence = 1;
            break;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( !Abc_NtkPrepareTwoNtks( pErr, pNtk, pArgvNew, nArgcNew , &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
        return 1;

    if( (unsigned)Abc_NtkPiNum(pNtk1) != (unsigned)Abc_NtkPiNum(pNtk2) || (unsigned)Abc_NtkPoNum(pNtk1) != (unsigned)Abc_NtkPoNum(pNtk2) )
    {
        Abc_Print( -2, "Mismatch in the number of inputs or outputs\n");
        if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
        return 1;
    }

    bmGateWay( pNtk1, pNtk2, p_equivalence );

    if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
    if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    return 0;

usage:
    Abc_Print( -2, "usage: bm [-P] <file1> <file2>\n" );
    Abc_Print( -2, "\t        performs Boolean matching (P-equivalence & PP-equivalence)\n" );
    Abc_Print( -2, "\t        for equivalent circuits, I/O matches are printed in IOmatch.txt\n" );
    Abc_Print( -2, "\t-P    : performs P-equivalnce checking\n");
    Abc_Print( -2, "\t        default is PP-equivalence checking (when -P is not provided)\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    Abc_Print( -2, "\tfile1 : the file with the first network\n");
    Abc_Print( -2, "\tfile2 : the file with the second network\n");

    Abc_Print( -2, "\t        \n" );
    Abc_Print( -2, "\t        This command was contributed by Hadi Katebi from U Michigan.\n" );
    Abc_Print( -2, "\t        The paper describing the method: H. Katebi and I. L. Markov.\n" );
    Abc_Print( -2, "\t        \"Large-scale Boolean matching\". Proc. DATE 2010. \n" );
    Abc_Print( -2, "\t        http://www.eecs.umich.edu/~imarkov/pubs/conf/date10-match.pdf\n" );
//    Abc_Print( -2, "\t        \n" );

    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBm2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pOut, * pErr;
    Abc_Ntk_t *pNtk, *pNtk1, *pNtk2;
    int fDelete1, fDelete2;
    Abc_Obj_t * pObj;
    char ** pArgvNew;
    int c, nArgcNew, i;

    extern void saucyGateWay( Abc_Ntk_t * pNtk, Abc_Obj_t * pNodePo, FILE * gFile, int fBooleanMatching,
                              int fLookForSwaps, int fFixOutputs, int fFixInputs, int fQuiet, int fPrintTree);

    pNtk = Abc_FrameReadNtk(pAbc);
    pOut = Abc_FrameReadOut(pAbc);
    pErr = Abc_FrameReadErr(pAbc);

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( !Abc_NtkPrepareTwoNtks( pErr, pNtk, pArgvNew, nArgcNew , &pNtk1, &pNtk2, &fDelete1, &fDelete2, 1 ) )
        return 1;

    if( (unsigned)Abc_NtkPiNum(pNtk1) != (unsigned)Abc_NtkPiNum(pNtk2) ||
        (unsigned)Abc_NtkPoNum(pNtk1) != (unsigned)Abc_NtkPoNum(pNtk2) )
    {
        Abc_Print( -2, "Mismatch in the number of inputs or outputs\n");
        Abc_Print( -2, "*** Networks are NOT equivalent ***\n");
        if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
        if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
        return 1;
    }

    Abc_NtkPermute(pNtk2, 1, 1, 0, NULL );
    Abc_NtkShortNames(pNtk2);

    Abc_NtkForEachCi( pNtk1, pObj, i ) {
        char * newName = Abc_ObjNamePrefix( pObj, "N1:" );
        Nm_ManDeleteIdName( pNtk1->pManName, pObj->Id);
        Abc_ObjAssignName( pObj, newName, NULL );
    }
    Abc_NtkForEachCo( pNtk1, pObj, i ) {
        char * newName = Abc_ObjNamePrefix( pObj, "N1:" );
        Nm_ManDeleteIdName( pNtk1->pManName, pObj->Id);
        Abc_ObjAssignName( pObj, newName, NULL );
    }

    Abc_NtkForEachCi( pNtk2, pObj, i ) {
        char * newName = Abc_ObjNamePrefix( pObj, "N2:" );
        Nm_ManDeleteIdName( pNtk2->pManName, pObj->Id);
        Abc_ObjAssignName( pObj, newName, NULL );
    }
    Abc_NtkForEachCo( pNtk2, pObj, i ) {
        char * newName = Abc_ObjNamePrefix( pObj, "N2:" );
        Nm_ManDeleteIdName( pNtk2->pManName, pObj->Id);
        Abc_ObjAssignName( pObj, newName, NULL );
    }

    Abc_NtkAppend( pNtk1, pNtk2, 1 );
    saucyGateWay( pNtk1, NULL, NULL, 1, 0, 0, 0, 0, 0);

    if ( fDelete1 ) Abc_NtkDelete( pNtk1 );
    if ( fDelete2 ) Abc_NtkDelete( pNtk2 );
    return 0;

usage:
    Abc_Print( -2, "usage: bm2  <file1> <file2>\n" );
    Abc_Print( -2, "\t        performs Boolean matching (PP-equivalence)\n" );
    Abc_Print( -2, "\t        for equivalent circuits, permutation that maps one circuit\n" );
    Abc_Print( -2, "\t        to another is printed to standard output (PIs and POs of the\n" );
    Abc_Print( -2, "\t        first network have prefix \"N1:\", while PIs and POs of the\n" );
    Abc_Print( -2, "\t        second network have prefix \"N2:\")\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    Abc_Print( -2, "\tfile1 : the file with the first network\n");
    Abc_Print( -2, "\tfile2 : the file with the second network\n");

    Abc_Print( -2, "\t        \n" );
    Abc_Print( -2, "\t        This command was contributed by Hadi Katebi from U Michigan.\n" );
    Abc_Print( -2, "\t        The paper describing the method: H. Katebi, K. Sakallah and\n");
    Abc_Print( -2, "\t        I. L. Markov.\n" );
    Abc_Print( -2, "\t        \"Generalized Boolean Symmetries Through Nested Partition\n");
    Abc_Print( -2, "\t        Refinement\". Proc. ICCAD 2013. \n" );
    //Abc_Print( -2, "\t        http://www.eecs.umich.edu/~imarkov/pubs/conf/date10-match.pdf\n" );
//    Abc_Print( -2, "\t        \n" );

    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandSaucy( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t *pNtk;
    char * outputName = NULL;
    FILE * gFile = NULL;
    int fOutputsOneAtTime = 0;
    int fFixOutputs = 0;
    int fFixInputs = 0;
    int fLookForSwaps = 0;
    int fQuiet = 0;
    int fPrintTree = 0;
    int c;

    extern void saucyGateWay( Abc_Ntk_t * pNtk, Abc_Obj_t * pNodePo, FILE * gFile, int fBooleanMatching,
                              int fLookForSwaps, int fFixOutputs, int fFixInputs, int fQuiet, int fPrintTree);

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "OFiosqvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an output name or the keyword all.\n" );
                goto usage;
            }
            outputName = argv[globalUtilOptind];
            if ( !strcmp(argv[globalUtilOptind], "all") )
                fOutputsOneAtTime ^= 1;
            globalUtilOptind++;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a file name.\n" );
                goto usage;
            }
            if ( (gFile = fopen( argv[globalUtilOptind], "w" )) == NULL )
            {
                Abc_Print( -1, "Cannot create output file \"%s\". ", argv[globalUtilOptind] );
                return 1;
            }
            globalUtilOptind++;
            break;
        case 'i':
            fFixOutputs ^= 1;
            break;
        case 'o':
            fFixInputs ^= 1;
            break;
        case 's':
            fLookForSwaps ^= 1;
            break;
        case 'q':
            fQuiet ^= 1;
            break;
        case 'v':
            fPrintTree ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    pNtk = Abc_FrameReadNtk(pAbc);

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command works only for AIGs (run \"strash\").\n" );
        return 1;
    }

    pNtk = Abc_NtkDup( pNtk );
    Abc_NtkOrderObjsByName( pNtk, 1 );

    if (fOutputsOneAtTime) {
        int i;
        Abc_Obj_t * pNodePo;
        FILE * hadi = fopen("hadi.txt", "w");
        Abc_NtkForEachPo( pNtk, pNodePo, i ) {
            printf("Ouput %s\n\n", Abc_ObjName(pNodePo));
            saucyGateWay( pNtk, pNodePo, gFile, 0, fLookForSwaps, fFixOutputs, fFixInputs, fQuiet, fPrintTree );
            printf("----------------------------------------\n");
        }
        fclose(hadi);
    } else if (outputName != NULL) {
        int i;
        Abc_Obj_t * pNodePo;
        Abc_NtkForEachPo( pNtk, pNodePo, i ) {
            if (!strcmp(Abc_ObjName(pNodePo), outputName)) {
                saucyGateWay( pNtk, pNodePo, gFile, 0, fLookForSwaps, fFixOutputs, fFixInputs, fQuiet, fPrintTree );
                Abc_NtkDelete( pNtk );
                return 0;
            }
        }
        Abc_Print( -1, "Output not found\n" );
        return 1;
    } else
        saucyGateWay( pNtk, NULL, gFile, 0, fLookForSwaps, fFixOutputs, fFixInputs, fQuiet, fPrintTree );

    if (gFile != NULL) fclose(gFile);
    Abc_NtkDelete( pNtk );
    return 0;

usage:
    Abc_Print( -2, "usage: saucy3 [-O <name>] [-F <file>] [-iosqvh]\n\n" );
    Abc_Print( -2, "\t            computes functional symmetries of the netowrk\n" );
    Abc_Print( -2, "\t            prints symmetry generators to the standard output\n" );
    Abc_Print( -2, "\t-O <name> : (optional) compute symmetries only for output given by name\n");
    Abc_Print( -2, "\t            only inputs in the output cone are permuted\n");
    Abc_Print( -2, "\t            (special case) name=all, compute symmetries for each\n" );
    Abc_Print( -2, "\t            output, but only one output at a time\n" );
    Abc_Print( -2, "\t            [default = compute symmetries by permuting all I/Os]\n" );
    Abc_Print( -2, "\t-F <file> : print symmetry generators to file [default = stdout]\n");
    Abc_Print( -2, "\t-i        : permute just the inputs (fix the outputs) [default = no]\n");
    Abc_Print( -2, "\t-o        : permute just the outputs (fix the inputs) [default = no]\n");
    Abc_Print( -2, "\t-s        : only look for swaps of inputs [default = no]\n");
    Abc_Print( -2, "\t-q        : quiet (do not print symmetry generators) [default = no]\n");
    Abc_Print( -2, "\t-v        : verbose (print the search tree) [default = no]\n");
    Abc_Print( -2, "\t-h        : print the command usage\n");

    Abc_Print( -2, "\t            \n" );
    Abc_Print( -2, "\t            This command was contributed by Hadi Katebi from U Michigan.\n" );
    Abc_Print( -2, "\t            The paper describing the method: H. Katebi, K. Sakallah and\n");
    Abc_Print( -2, "\t            I. L. Markov.\n" );
    Abc_Print( -2, "\t            \"Generalized Boolean Symmetries Through Nested Partition\n");
    Abc_Print( -2, "\t            Refinement\". Proc. ICCAD 2013. \n" );
    //Abc_Print( -2, "\t          http://www.eecs.umich.edu/~imarkov/pubs/conf/date10-match.pdf\n" );
    Abc_Print( -2, "\t            Saucy webpage: http://vlsicad.eecs.umich.edu/BK/SAUCY/\n" );

    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTestCex( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk;
    int c;
    int nOutputs = 0;
    int fCheckAnd = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Oah" ) ) != EOF )
    {
        switch ( c )
        {
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            nOutputs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOutputs < 0 )
                goto usage;
            break;
        case 'a':
            fCheckAnd ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    if ( pAbc->pCex == NULL )
    {
        Abc_Print( 1, "There is no current cex.\n");
        return 0;
    }

    if ( !fCheckAnd )
    {
        // check the main AIG
        pNtk = Abc_FrameReadNtk(pAbc);
        if ( pNtk == NULL )
            Abc_Print( 1, "Main AIG: There is no current network.\n");
        else if ( !Abc_NtkIsStrash(pNtk) )
            Abc_Print( 1, "Main AIG: The current network is not an AIG.\n");
        else if ( Abc_NtkPiNum(pNtk) != pAbc->pCex->nPis )
            Abc_Print( 1, "Main AIG: The number of PIs (%d) is different from cex (%d).\n", Abc_NtkPiNum(pNtk), pAbc->pCex->nPis );
        else
        {
            extern int Abc_NtkVerifyCex( Abc_Ntk_t * pNtk, Abc_Cex_t * p );
            int iPoOld = pAbc->pCex->iPo;
            pAbc->pCex->iPo = Abc_NtkVerifyCex( pNtk, pAbc->pCex );
            if ( pAbc->pCex->iPo == -1 )
                Abc_Print( 1, "Main AIG: The cex does not fail any outputs.\n" );
            else if ( iPoOld != pAbc->pCex->iPo )
                Abc_Print( 1, "Main AIG: The cex refined PO %d instead of PO %d.\n", pAbc->pCex->iPo, iPoOld );
            else
                Abc_Print( 1, "Main AIG: The cex is correct.\n" );
        }
    }
    else
    {
        // check the AND AIG
        if ( pAbc->pGia == NULL )
            Abc_Print( 1, "And  AIG: There is no current network.\n");
        else if ( Gia_ManPiNum(pAbc->pGia) != pAbc->pCex->nPis )
            Abc_Print( 1, "And  AIG: The number of PIs (%d) is different from cex (%d).\n", Gia_ManPiNum(pAbc->pGia), pAbc->pCex->nPis );
        else
        {
            int iPoOld = pAbc->pCex->iPo;
            pAbc->pCex->iPo = Gia_ManFindFailedPoCex( pAbc->pGia, pAbc->pCex, nOutputs );
            if ( pAbc->pCex->iPo == -1 )
                Abc_Print( 1, "And  AIG: The cex does not fail any outputs.\n" );
            else if ( iPoOld != pAbc->pCex->iPo )
                Abc_Print( 1, "And  AIG: The cex refined PO %d instead of PO %d.\n", pAbc->pCex->iPo, iPoOld );
            else
                Abc_Print( 1, "And  AIG: The cex is correct.\n" );
        }
    }
    return 0;

usage:
    Abc_Print( -2, "usage: testcex [-O num] [-ah]\n" );
    Abc_Print( -2, "\t         tests the current cex against the current AIG or the &-AIG\n" );
    Abc_Print( -2, "\t-O num : the number of real POs in the PO list [default = %d]\n", nOutputs );
    Abc_Print( -2, "\t-a     : toggle checking the current AIG or the &-AIG [default = %s]\n", fCheckAnd ? "&-AIG": "current AIG" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandPdr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_NtkDarPdr( Abc_Ntk_t * pNtk, Pdr_Par_t * pPars );
    Pdr_Par_t Pars, * pPars = &Pars;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkUsed, * pNtkFlop = NULL;
    char * pLogFileName = NULL;
    int c;
    Pdr_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "MFCDQTHGSLIaxrmuyfqipdegjonctkvwzh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRecycle = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRecycle < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrameMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrameMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfLimit < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfGenLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfGenLimit < 0 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRestLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRestLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'H':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-H\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOutOne = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOutOne < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOutGap = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOutGap < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRandomSeed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRandomSeed < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a file name.\n" );
                goto usage;
            }
            pPars->pInvFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'a':
            pPars->fSolveAll ^= 1;
            break;
        case 'x':
            pPars->fStoreCex ^= 1;
            break;
        case 'r':
            pPars->fTwoRounds ^= 1;
            break;
        case 'm':
            pPars->fMonoCnf ^= 1;
            break;
        case 'u':
            pPars->fNewXSim ^= 1;
            break;
        case 'y':
            pPars->fFlopPrio ^= 1;
            break;
        case 'f':
            pPars->fFlopOrder ^= 1;
            break;
        case 'q':
            pPars->fShortest ^= 1;
            break;
        case 'i':
            pPars->fShiftStart ^= 1;
            break;
        case 'p':
            pPars->fReuseProofOblig ^= 1;
            break;
        case 'd':
            pPars->fDumpInv ^= 1;
            break;
        case 'e':
            pPars->fUseSupp ^= 1;
            break;
        case 'g':
            pPars->fSkipGeneral ^= 1;
            break;
        case 'j':
            pPars->fSimpleGeneral ^= 1;
            break;
        case 'o':
            pPars->fUsePropOut ^= 1;
            break;
        case 'n':
            pPars->fSkipDown ^= 1;
            break;
        case 'c':
            pPars->fCtgs ^= 1;
            break;
        case 't':
            pPars->fUseAbs ^= 1;
            break;
        case 'k':
            pPars->fUseSimpleRef ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'z':
            pPars->fNotVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pNtk == NULL )
    {
        Abc_Print( -2, "There is no current network.\n");
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -2, "The current network is not an AIG (run \"strash\").\n");
        return 0;
    }
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }
    if ( Abc_NtkLatchNum(pNtk) == 0 )
    {
        pNtkFlop = Abc_NtkDup( pNtk );
        Abc_NtkAddLatch( pNtkFlop, Abc_AigConst1(pNtkFlop), ABC_INIT_ONE );
    }
    // run the procedure
    pPars->fUseBridge = pAbc->fBridgeMode;
    pNtkUsed = pNtkFlop ? pNtkFlop : pNtk;
    pAbc->Status  = Abc_NtkDarPdr( pNtkUsed, pPars );
    pAbc->nFrames = pNtkUsed->vSeqModelVec ? -1 : pPars->iFrame;
    Abc_FrameReplacePoStatuses( pAbc, &pPars->vOutMap );
    if ( pNtkUsed->vSeqModelVec )
        Abc_FrameReplaceCexVec( pAbc, &pNtkUsed->vSeqModelVec );
    else
        Abc_FrameReplaceCex( pAbc, &pNtkUsed->pSeqModel );
    if ( pNtkFlop ) Abc_NtkDelete( pNtkFlop );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "pdr" );
    return 0;

usage:
    Abc_Print( -2, "usage: pdr [-MFCDQTHGS <num>] [-LI <file>] [-axrmuyfqipdegjonctkvwzh]\n" );
    Abc_Print( -2, "\t         model checking using property directed reachability (aka IC3)\n" );
    Abc_Print( -2, "\t         pioneered by Aaron R. Bradley (http://theory.stanford.edu/~arbrad/)\n" );
    Abc_Print( -2, "\t         with improvements by Niklas Een (http://een.se/niklas/)\n" );
    Abc_Print( -2, "\t-M num : limit on unused vars to trigger SAT solver recycling [default = %d]\n",       pPars->nRecycle );
    Abc_Print( -2, "\t-F num : limit on timeframes explored to stop computation [default = %d]\n",           pPars->nFrameMax );
    Abc_Print( -2, "\t-C num : limit on conflicts in one SAT call (0 = no limit) [default = %d]\n",          pPars->nConfLimit );
    Abc_Print( -2, "\t-D num : limit on conflicts during ind-generalization (0 = no limit) [default = %d]\n",pPars->nConfGenLimit );
    Abc_Print( -2, "\t-Q num : limit on proof obligations before a restart (0 = no limit) [default = %d]\n", pPars->nRestLimit );
    Abc_Print( -2, "\t-T num : runtime limit, in seconds (0 = no limit) [default = %d]\n",                   pPars->nTimeOut );
    Abc_Print( -2, "\t-H num : runtime limit per output, in miliseconds (with \"-a\") [default = %d]\n",     pPars->nTimeOutOne );
    Abc_Print( -2, "\t-G num : runtime gap since the last CEX (0 = no limit) [default = %d]\n",              pPars->nTimeOutGap );
    Abc_Print( -2, "\t-S num : * value to seed the SAT solver with [default = %d]\n",                          pPars->nRandomSeed );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n",                                          pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-I file: the invariant file name [default = %s]\n",                                    pPars->pInvFileName ? pPars->pInvFileName : "default name" );
    Abc_Print( -2, "\t-a     : toggle solving all outputs even if one of them is SAT [default = %s]\n",      pPars->fSolveAll? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle storing CEXes when solving all outputs [default = %s]\n",              pPars->fStoreCex? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle using more effort in generalization [default = %s]\n",                 pPars->fTwoRounds? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle using monolythic CNF computation [default = %s]\n",                    pPars->fMonoCnf? "yes": "no" );
    Abc_Print( -2, "\t-u     : toggle updated X-valued simulation [default = %s]\n",                         pPars->fNewXSim? "yes": "no" );
    Abc_Print( -2, "\t-y     : toggle using structural flop priorities [default = %s]\n",                    pPars->fFlopPrio? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle ordering flops by cost before generalization [default = %s]\n",        pPars->fFlopOrder? "yes": "no" );
    Abc_Print( -2, "\t-q     : toggle creating only shortest counter-examples [default = %s]\n",             pPars->fShortest? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggle clause pushing from an intermediate timeframe [default = %s]\n",       pPars->fShiftStart? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle reusing proof-obligations in the last timeframe [default = %s]\n",     pPars->fReuseProofOblig? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle dumping invariant (valid if init state is all-0) [default = %s]\n",    pPars->fDumpInv? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle using only support variables in the invariant [default = %s]\n",       pPars->fUseSupp? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle skipping expensive generalization step [default = %s]\n",              pPars->fSkipGeneral? "yes": "no" );
    Abc_Print( -2, "\t-j     : toggle using simplified generalization step [default = %s]\n",                pPars->fSimpleGeneral? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle using property output as inductive hypothesis [default = %s]\n",       pPars->fUsePropOut? "yes": "no" );
    Abc_Print( -2, "\t-n     : * toggle skipping \'down\' in generalization [default = %s]\n",                 pPars->fSkipDown? "yes": "no" );
    Abc_Print( -2, "\t-c     : * toggle handling CTGs in \'down\' [default = %s]\n",                           pPars->fCtgs? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle using abstraction [default = %s]\n",                                   pPars->fUseAbs? "yes": "no" );
    Abc_Print( -2, "\t-k     : toggle using simplified refinement [default = %s]\n",                         pPars->fUseSimpleRef? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing optimization summary [default = %s]\n",                       pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing detailed stats default = %s]\n",                              pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle suppressing report about solved outputs [default = %s]\n",             pPars->fNotVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n\n");
    Abc_Print( -2, "\t* Implementation of switches -S, -n, and -c is contributed by Zyad Hassan.\n");
    Abc_Print( -2, "\t  The theory and experiments supporting this work can be found in the following paper:\n");
    Abc_Print( -2, "\t  Zyad Hassan, Aaron R. Bradley, Fabio Somenzi, \"Better Generalization in IC3\", FMCAD 2013.\n");
    Abc_Print( -2, "\t  (http://www.cs.utexas.edu/users/hunt/FMCAD/FMCAD13/papers/85-Better-Generalization-IC3.pdf)\n");



    return 1;
}

#ifdef ABC_USE_CUDD

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandReconcile( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Cex_t * Llb4_Nonlin4NormalizeCex( Aig_Man_t * pAigOrg, Aig_Man_t * pAigRpm, Abc_Cex_t * pCexRpm );
    Abc_Cex_t * pCex;
    Abc_Ntk_t * pNtk1 = NULL, * pNtk2 = NULL;
    Aig_Man_t * pAig1 = NULL, * pAig2 = NULL;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    if ( argc != globalUtilOptind + 2 && argc != globalUtilOptind )
    {
        Abc_Print( 1,"Does not seen to have two files names as arguments.\n" );
        return 1;
    }
    if ( pAbc->pCex == NULL )
    {
        Abc_Print( 1,"There is no current counter-example.\n" );
        return 1;
    }

    if ( argc == globalUtilOptind + 2 )
    {
        // derive networks
        pNtk1 = Io_Read( argv[globalUtilOptind], Io_ReadFileType(argv[globalUtilOptind]), 1, 0 );
        if ( pNtk1 == NULL )
            return 1;
        pNtk2 = Io_Read( argv[globalUtilOptind+1], Io_ReadFileType(argv[globalUtilOptind+1]), 1, 0 );
        if ( pNtk2 == NULL )
        {
            Abc_NtkDelete( pNtk1 );
            return 1;
        }
        // create counter-examples
        pAig1 = Abc_NtkToDar( pNtk1, 0, 0 );
        pAig2 = Abc_NtkToDar( pNtk2, 0, 0 );
    }
    else if ( argc == globalUtilOptind )
    {
        if ( pAbc->pNtkCur == NULL )
        {
            Abc_Print( 1, "There is no AIG in the main-space.\n");
            return 0;
        }
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( 1, "There is no AIG in the &-space.\n");
            return 0;
        }
        // create counter-examples
        pAig1 = Abc_NtkToDar( pAbc->pNtkCur, 0, 0 );
        pAig2 = Gia_ManToAigSimple( pAbc->pGia );
    }
    else assert( 0 );
    pCex = Llb4_Nonlin4NormalizeCex( pAig1, pAig2, pAbc->pCex );
    Aig_ManStop( pAig1 );
    Aig_ManStop( pAig2 );
    if ( pNtk2 )  Abc_NtkDelete( pNtk2 );
    if ( pCex == NULL )
    {
        Abc_Print( 1,"Counter-example computation has failed.\n" );
        if ( pNtk1 )  Abc_NtkDelete( pNtk1 );
        return 1;
    }

    // replace the current network
    if ( pNtk1 )
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtk1 );
    // update the counter-example
    pAbc->nFrames = pCex->iFrame;
    Abc_FrameReplaceCex( pAbc, &pCex );
    return 0;

usage:
    Abc_Print( -2, "usage: reconcile [-h] <fileOrigin> <fileReparam>\n" );
    Abc_Print( -2, "\t        reconciles current CEX with <fileOrigin>\n" );
    Abc_Print( -2, "\t        More specifically:\n" );
    Abc_Print( -2, "\t        (i) assumes that <fileReparam> is an AIG derived by input\n" );
    Abc_Print( -2, "\t        reparametrization of <fileOrigin> without seq synthesis;\n" );
    Abc_Print( -2, "\t        (ii) assumes that current CEX is valid for <fileReparam>;\n" );
    Abc_Print( -2, "\t        (iii) derives new CEX for <fileOrigin> and sets this CEX\n" );
    Abc_Print( -2, "\t        and <fileOrigin> to be current CEX and current network\n" );
    Abc_Print( -2, "\t<fileOrigin>   : file name with the original AIG\n");
    Abc_Print( -2, "\t<fileReparam>  : file name with the reparametrized AIG\n");
    Abc_Print( -2, "\t        (if both file names are not given on the command line,\n");
    Abc_Print( -2, "\t        original/reparam AIG has to be in the main-space/&-space)\n");
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

#endif

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCexSave( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pCex == NULL )
    {
        Abc_Print( -1, "Current CEX is not available..\n" );
        return 1;
    }
    ABC_FREE( pAbc->pCex2 );
    pAbc->pCex2 = Abc_CexDup( pAbc->pCex, -1 );
    return 0;

usage:
    Abc_Print( -2, "usage: cexsave [-h]\n" );
    Abc_Print( -2, "\t        saves the current CEX into the internal storage\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCexLoad( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pCex2 == NULL )
    {
        Abc_Print( -1, "Saved CEX is not available.\n" );
        return 1;
    }
    ABC_FREE( pAbc->pCex );
    pAbc->pCex = Abc_CexDup( pAbc->pCex2, -1 );
    // update status
    pAbc->nFrames = pAbc->pCex2->iFrame;
    pAbc->Status = 0;
    return 0;

usage:
    Abc_Print( -2, "usage: cexload [-h]\n" );
    Abc_Print( -2, "\t        loads the current CEX from the internal storage\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCexCut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtkNew;
    int c, iFrStart = 0;
    int iFrStop     = ABC_INFINITY;
    int fCombOnly   = 0;
    int fUseOne     = 0;
    int fAllFrames  = 0;
    int fVerbose    = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FGcnmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrStart < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrStop = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrStop < 0 )
                goto usage;
            break;
        case 'c':
            fCombOnly ^= 1;
            break;
        case 'n':
            fUseOne ^= 1;
            break;
        case 'm':
            fAllFrames ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    if ( pAbc->pCex == NULL )
    {
        Abc_Print( 1, "There is no current cex.\n");
        return 0;
    }
    if ( pAbc->pNtkCur == NULL )
    {
        Abc_Print( 1, "There is no AIG in the &-space.\n");
        return 0;
    }
    if ( !Abc_NtkIsStrash(pAbc->pNtkCur) )
    {
        Abc_Print( 1, "Current network is not an AIG.\n");
        return 0;
    }
    if ( iFrStop == ABC_INFINITY )
        iFrStop = pAbc->pCex->iFrame;

    {
        Aig_Man_t * pAig = Abc_NtkToDar( pAbc->pNtkCur, 0, 1 );
        Aig_Man_t * pAigNew = Bmc_AigTargetStates( pAig, pAbc->pCex, iFrStart, iFrStop, fCombOnly, fUseOne, fAllFrames, fVerbose );
        Aig_ManStop( pAig );
        if ( pAigNew == NULL )
        {
            Abc_Print( 1, "Command has failed.\n");
            return 0;
        }
        pNtkNew = Abc_NtkFromAigPhase( pAigNew );
        pNtkNew->pName = Extra_UtilStrsav( pAbc->pNtkCur->pName );
        Aig_ManStop( pAigNew );
        // update the network
        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkNew );
    }
/*
    pGiaNew = Bmc_GiaTargetStates( pAbc->pGia, pAbc->pCex, iFrStart, iFrStop, fCombOnly, fUseOne, fVerbose );
    if ( pGiaNew == NULL )
    {
        Abc_Print( 1, "Command has failed.\n");
        return 0;
    }
    Abc_FrameUpdateGia( pAbc, pGiaNew );
*/
    return 0;

usage:
    Abc_Print( -2, "usage: cexcut [-FG num] [-cnmvh]\n" );
    Abc_Print( -2, "\t         creates logic for bad states using the current CEX\n" );
    Abc_Print( -2, "\t-F num : 0-based number of the starting frame [default = %d]\n", iFrStart );
    Abc_Print( -2, "\t-G num : 0-based number of the ending frame [default = %d]\n",   iFrStop );
    Abc_Print( -2, "\t-c     : toggle outputting unate combinational circuit [default = %s]\n",  fCombOnly? "yes": "no" );
    Abc_Print( -2, "\t-n     : toggle generating only one bad state [default = %s]\n", fUseOne? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle generating bad states for all frames after G [default = %s]\n", fAllFrames? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCexMerge( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Cex_t * pCexNew;
    int c;
    int iFrStart = 0;
    int iFrStop  = ABC_INFINITY;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FGvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrStart < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrStop = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrStop < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    if ( pAbc->pCex == NULL )
    {
        Abc_Print( 1, "There is no current cex.\n");
        return 0;
    }
    if ( pAbc->pCex2 == NULL )
    {
        Abc_Print( 1, "There is no saved cex.\n");
        return 0;
    }
    if ( iFrStop - iFrStart + pAbc->pCex->iPo < pAbc->pCex->iFrame )
    {
        Abc_Print( 1, "Current CEX does not allow to shorten the saved CEX.\n");
        return 0;
    }
    pCexNew = Abc_CexMerge( pAbc->pCex2, pAbc->pCex, iFrStart, iFrStop );
    if ( pCexNew == NULL )
    {
        Abc_Print( 1, "Merging CEXes has failed.\n");
        return 0;
    }
    // replace the saved CEX
    ABC_FREE( pAbc->pCex2 );
    pAbc->pCex2 = pCexNew;
    return 0;

usage:
    Abc_Print( -2, "usage: cexmerge [-FG num] [-vh]\n" );
    Abc_Print( -2, "\t         merges the current CEX into the saved one\n" );
    Abc_Print( -2, "\t         and sets the resulting CEX as the saved one\n" );
    Abc_Print( -2, "\t-F num : 0-based number of the starting frame [default = %d]\n", iFrStart );
    Abc_Print( -2, "\t-G num : 0-based number of the ending frame [default = %d]\n",   iFrStop );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandCexMin( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk;
    Abc_Cex_t * vCexNew = NULL;
    int c;
    int nConfLimit = 1000;
    int nRounds    =    1;
    int fVerbose   =    0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CRvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRounds < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    if ( pAbc->pCex == NULL )
    {
        Abc_Print( 1, "There is no current cex.\n");
        return 0;
    }

    // check the main AIG
    pNtk = Abc_FrameReadNtk(pAbc);
    if ( pNtk == NULL )
        Abc_Print( 1, "Main AIG: There is no current network.\n");
    else if ( !Abc_NtkIsStrash(pNtk) )
        Abc_Print( 1, "Main AIG: The current network is not an AIG.\n");
    else if ( Abc_NtkPiNum(pNtk) != pAbc->pCex->nPis )
        Abc_Print( 1, "Main AIG: The number of PIs (%d) is different from cex (%d).\n", Abc_NtkPiNum(pNtk), pAbc->pCex->nPis );
//      else if ( Abc_NtkLatchNum(pNtk) != pAbc->pCex->nRegs )
//          Abc_Print( 1, "Main AIG: The number of registers (%d) is different from cex (%d).\n", Abc_NtkLatchNum(pNtk), pAbc->pCex->nRegs );
//      else if ( Abc_NtkPoNum(pNtk) <= pAbc->pCex->iPo )
//          Abc_Print( 1, "Main AIG: The number of POs (%d) is less than the PO index in cex (%d).\n", Abc_NtkPoNum(pNtk), pAbc->pCex->iPo );
    else
    {
        Aig_Man_t * pAig = Abc_NtkToDar( pNtk, 0, 1 );
        Gia_Man_t * pGia = Gia_ManFromAigSimple( pAig );
//        if ( !Gia_ManVerifyCex( pGia, pAbc->pCex, 0 ) )
        int iPoOld = pAbc->pCex->iPo;
        pAbc->pCex->iPo = Gia_ManFindFailedPoCex( pGia, pAbc->pCex, 0 );
        Gia_ManStop( pGia );
        if ( pAbc->pCex->iPo == -1 )
        {
            pAbc->pCex->iPo = iPoOld;
            Abc_Print( -1, "Main AIG: The cex does not fail any outputs.\n" );
            return 0;
        }
        else if ( iPoOld != pAbc->pCex->iPo )
            Abc_Print( 0, "Main AIG: The cex refined PO %d instead of PO %d.\n", pAbc->pCex->iPo, iPoOld );
        // perform minimization
        vCexNew = Saig_ManCexMinPerform( pAig, pAbc->pCex );
        Aig_ManStop( pAig );
        Abc_CexFree( vCexNew );
//        Abc_FrameReplaceCex( pAbc, &vCexNew );

//        Abc_Print( 1,"Implementation of this command is not finished.\n" );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: cexmin [-CR num] [-vh]\n" );
    Abc_Print( -2, "\t         reduces the length of the counter-example\n" );
    Abc_Print( -2, "\t-C num : the maximum number of conflicts [default = %d]\n", nConfLimit );
    Abc_Print( -2, "\t-R num : the number of minimization rounds [default = %d]\n", nRounds );
    Abc_Print( -2, "\t-v     : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandDualRail( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Int_t * Abc_NtkFindDcLatches( Abc_Ntk_t * pNtk );
    Abc_Ntk_t * pNtk, * pNtkNew = NULL;
    Aig_Man_t * pAig, * pAigNew;
    Vec_Int_t * vDcFlops = NULL;
    int c;
    int nDualPis   = 0;
    int fDualFfs   = 0;
    int fDualDcFfs = 0;
    int fMiterFfs  = 0;
    int fComplPo   = 0;
    int fCheckZero = 0;
    int fCheckOne  = 0;
    int fVerbose   = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Itxfczovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nDualPis = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDualPis < 0 )
                goto usage;
            break;
        case 't':
            fDualFfs ^= 1;
            break;
        case 'x':
            fDualDcFfs ^= 1;
            break;
        case 'f':
            fMiterFfs ^= 1;
            break;
        case 'c':
            fComplPo ^= 1;
            break;
        case 'z':
            fCheckZero ^= 1;
            break;
        case 'o':
            fCheckOne ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    // check the main AIG
    pNtk = Abc_FrameReadNtk(pAbc);
    if ( pNtk == NULL )
    {
        Abc_Print( 1, "Main AIG: There is no current network.\n");
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( 1, "Main AIG: The current network is not an AIG.\n");
        return 0;
    }

    if ( fDualDcFfs )
        vDcFlops = Abc_NtkFindDcLatches( pNtk );

    // transform
    pAig = Abc_NtkToDar( pNtk, 0, 1 );
    pAigNew = Saig_ManDupDual( pAig, vDcFlops, nDualPis, fDualFfs, fMiterFfs, fComplPo, fCheckZero, fCheckOne );
    Aig_ManStop( pAig );
    pNtkNew = Abc_NtkFromAigPhase( pAigNew );
    pNtkNew->pName = Extra_UtilStrsav(pNtk->pName);
    Aig_ManStop( pAigNew );
    Vec_IntFreeP( &vDcFlops );

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkNew );
    return 0;

usage:
    Abc_Print( -2, "usage: dualrail [-I num] [-txfczovh]\n" );
    Abc_Print( -2, "\t         transforms the current AIG into a dual-rail miter\n" );
    Abc_Print( -2, "\t         expressing the property \"at least one PO has ternary value\"\n" );
    Abc_Print( -2, "\t         (to compute an initialization sequence, use switches \"-tfc\")\n" );
    Abc_Print( -2, "\t-I num : the number of first PIs interpreted as ternary [default = %d]\n", nDualPis );
    Abc_Print( -2, "\t-t     : toggle ternary flop init values for all flops [default = %s]\n", fDualFfs? "yes": "const0 init values" );
    Abc_Print( -2, "\t-x     : toggle ternary flop init values for DC-valued flops [default = %s]\n", fDualDcFfs? "yes": "const0 init values" );
    Abc_Print( -2, "\t-f     : toggle mitering flops instead of POs [default = %s]\n", fMiterFfs? "flops": "POs" );
    Abc_Print( -2, "\t-c     : toggle complementing the miter output [default = %s]\n", fComplPo? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle checking PO==0 instead of PO==X [default = %s]\n", fCheckZero? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle checking PO==1 instead of PO==X [default = %s]\n", fCheckOne? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandBlockPo( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkNew = NULL;
    Aig_Man_t * pAig;
    int c;
    int nCycles = 0;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nCycles = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCycles < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    // check the main AIG
    pNtk = Abc_FrameReadNtk(pAbc);
    if ( pNtk == NULL )
    {
        Abc_Print( 1, "Main AIG: There is no current network.\n");
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( 1, "Main AIG: The current network is not an AIG.\n");
        return 0;
    }
    if ( nCycles == 0 )
    {
        Abc_Print( 1, "The number of time frame is 0. The circuit is left unchanged.\n" );
        return 0;
    }

    // transform
    pAig = Abc_NtkToDar( pNtk, 0, 1 );
    Saig_ManBlockPo( pAig, nCycles );
    pNtkNew = Abc_NtkFromAigPhase( pAig );
    Aig_ManStop( pAig );
    // transfer the name
    pNtkNew->pName = Extra_UtilStrsav(pNtk->pName);
    pNtkNew->pSpec = Extra_UtilStrsav(pNtk->pSpec);
    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkNew );
    return 0;

usage:
    Abc_Print( -2, "usage: blockpo [-F num] [-fvh]\n" );
    Abc_Print( -2, "\t         forces the miter outputs to be \"true\" in the first F frames\n" );
    Abc_Print( -2, "\t-F num : the number of time frames [default = %d]\n", nCycles );
    Abc_Print( -2, "\t-v     : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandIso( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk, * pNtkNew = NULL;
    Aig_Man_t * pAig, * pTemp;
    Vec_Ptr_t * vPosEquivs = NULL;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    // check the main AIG
    pNtk = Abc_FrameReadNtk(pAbc);
    if ( pNtk == NULL )
    {
        Abc_Print( 1, "Main AIG: There is no current network.\n");
        return 0;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( 1, "Main AIG: The current network is not an AIG.\n");
        return 0;
    }
    if ( Abc_NtkPoNum(pNtk) == 1 )
    {
        Abc_Print( 1, "Current AIG has only one PO. Transformation is not performed.\n");
        return 0;
    }

    // transform
    pAig = Abc_NtkToDar( pNtk, 0, 1 );
    pTemp = Saig_ManIsoReduce( pAig, &vPosEquivs, fVerbose );
    pNtkNew = Abc_NtkFromAigPhase( pTemp );
    pNtkNew->pName = Extra_UtilStrsav(pNtk->pName);
    Aig_ManStop( pTemp );
    Aig_ManStop( pAig );

    // update the internal storage of PO equivalences
    Abc_FrameReplacePoEquivs( pAbc, &vPosEquivs );

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtkNew );
    return 0;

usage:
    Abc_Print( -2, "usage: iso [-vh]\n" );
    Abc_Print( -2, "\t         removes POs with isomorphic sequential COI\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTraceStart( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command is applicable to AIGs.\n" );
        return 1;
    }
/*
    Abc_HManStart();
    if ( !Abc_HManPopulate( pNtk ) )
    {
        Abc_Print( -1, "Failed to start the tracing database.\n" );
        return 1;
    }
*/
    return 0;

usage:
    Abc_Print( -2, "usage: trace_start [-h]\n" );
    Abc_Print( -2, "\t        starts verification tracing\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandTraceCheck( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash(pNtk) )
    {
        Abc_Print( -1, "This command is applicable to AIGs.\n" );
        return 1;
    }
/*
    if ( !Abc_HManIsRunning(pNtk) )
    {
        Abc_Print( -1, "The tracing database is not available.\n" );
        return 1;
    }

    if ( !Abc_HManVerify( 1, pNtk->Id ) )
        Abc_Print( -1, "Verification failed.\n" );
    Abc_HManStop();
*/
    return 0;

usage:
    Abc_Print( -2, "usage: trace_check [-h]\n" );
    Abc_Print( -2, "\t        checks the current network using verification trace\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}




/**Function*************************************************************

  Synopsis    [Compares to versions of the design and finds the best.]

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
static inline int Abc_NtkCompareWithBest( Abc_Ntk_t * pBest, Abc_Ntk_t * p, 
    float * pnBestNtkArea,  float * pnBestNtkDelay, 
    int *   pnBestNtkNodes, int *   pnBestNtkLevels, int fArea )
{ 
    float nNtkArea   = (float)Abc_NtkGetMappedArea(p);
    float nNtkDelay  = (float)Abc_NtkDelayTrace(p, NULL, NULL, 0);
    int   nNtkNodes  = Abc_NtkNodeNum(p);
    int   nNtkLevels = Abc_NtkLevel(p);

    if ( pBest == NULL ||
         Abc_NtkPiNum(pBest)    != Abc_NtkPiNum(p)    ||
         Abc_NtkPoNum(pBest)    != Abc_NtkPoNum(p)    ||
         Abc_NtkLatchNum(pBest) != Abc_NtkLatchNum(p) ||
         strcmp(Abc_NtkName(pBest), Abc_NtkName(p))   ||
//         (!fArea && (*pnBestNtkLevels > nNtkLevels || (*pnBestNtkLevels == nNtkLevels && *pnBestNtkDelay > nNtkDelay ))) ||
//         ( fArea && (*pnBestNtkNodes  > nNtkNodes  || (*pnBestNtkNodes  == nNtkNodes  && *pnBestNtkArea  > nNtkArea  )))
         (!fArea && (*pnBestNtkDelay > nNtkDelay || (*pnBestNtkDelay == nNtkDelay && *pnBestNtkArea  > nNtkArea  ))) ||
         ( fArea && (*pnBestNtkArea  > nNtkArea  || (*pnBestNtkArea  == nNtkArea  && *pnBestNtkDelay > nNtkDelay )))
       )
    {
        *pnBestNtkArea   = nNtkArea;
        *pnBestNtkDelay  = nNtkDelay; 
        *pnBestNtkNodes  = nNtkNodes;
        *pnBestNtkLevels = nNtkLevels;
        printf( "\nUpdating the best network (Area = %10.2f  Delay = %10.2f  Nodes = %6d  Level = %6d).\n\n", 
            nNtkArea, nNtkDelay, nNtkNodes, nNtkLevels );
        return 1;
    }
    return 0;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbcSave( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fArea = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ah" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fArea ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pNtkCur == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Abc_NtkHasMapping(pAbc->pNtkCur) )
    {
        Abc_Print( -1, "Network has no mapping.\n" );
        return 1;
    }
    if ( !Abc_NtkCompareWithBest( pAbc->pNtkBest, pAbc->pNtkCur, 
             &pAbc->nBestNtkArea,  &pAbc->nBestNtkDelay, 
             &pAbc->nBestNtkNodes, &pAbc->nBestNtkLevels, fArea ) )
        return 0;
    // save the design as best
    if ( pAbc->pNtkBest ) Abc_NtkDelete( pAbc->pNtkBest );
    pAbc->pNtkBest = Abc_NtkDup(pAbc->pNtkCur);
    return 0;

usage:
    Abc_Print( -2, "usage: save [-ah]\n" );
    Abc_Print( -2, "\t        compares and possibly saves network with mapping\n" );
    Abc_Print( -2, "\t-a    : toggle using area as the primary metric [default = %s]\n", fArea? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbcLoad( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    // restore from best
    if ( pAbc->pNtkBest == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbcLoad(): There is no best design saved.\n" );
        return 1;
    }
    if ( pAbc->pNtkCur ) Abc_NtkDelete( pAbc->pNtkCur );
    pAbc->pNtkCur = Abc_NtkDup(pAbc->pNtkBest);
    return 0;

usage:
    Abc_Print( -2, "usage: load [-h]\n" );
    Abc_Print( -2, "\t        loads mapped network previously saved by \"save\"\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Read( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Abc3_ReadShowHie( char * pFileName, int fFlat );
    extern Gia_Man_t * Gia_MiniAigSuperDerive( char * pFileName, int fVerbose );
    extern Gia_Man_t * Gia_FileSimpleRead( char * pFileName, int fNames, char * pFileW );
    extern Gia_Man_t * Gia_ManCreateXors( Gia_Man_t * p );
    Gia_Man_t * pAig = NULL;
    FILE * pFile;
    char ** pArgvNew;
    char * FileName, * pTemp;
    int c, nArgcNew;
    int fMiniAig = 0;
    int fMiniAig2 = 0;
    int fMiniLut = 0;
    int fVerbose = 0;
    int fGiaSimple = 0;
    int fSkipStrash = 0;
    int fNewReader = 0;
    int fDetectXors = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "csxmnlpvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fGiaSimple ^= 1;
            break;
        case 's':
            fSkipStrash ^= 1;
            break;
        case 'x':
            fDetectXors ^= 1;
            break;
        case 'm':
            fMiniAig ^= 1;
            break;
        case 'n':
            fMiniAig2 ^= 1;
            break;
        case 'l':
            fMiniLut ^= 1;
            break;
        case 'p':
            fNewReader ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "There is no file name.\n" );
        return 1;
    }

    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", ".blif", ".pla", ".eqn", ".bench" )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );

    if ( fNewReader )
        pAig = Gia_FileSimpleRead( FileName, fGiaSimple, NULL );
    else if ( fMiniAig )
        pAig = Gia_ManReadMiniAig( FileName, fGiaSimple || fSkipStrash );
    else if ( fMiniAig2 )
        pAig = Gia_MiniAigSuperDerive( FileName, fVerbose );
    else if ( fMiniLut )
        pAig = Gia_ManReadMiniLut( FileName );
//    else if ( Extra_FileIsType( FileName, ".v", NULL, NULL ) )
//        Abc3_ReadShowHie( FileName, fSkipStrash );
    else
    {
        pAig = Gia_AigerRead( FileName, fGiaSimple, fSkipStrash, 0 );
        if ( fDetectXors )
        {
            Gia_Man_t * pTemp;
            pAig = Gia_ManCreateXors( pTemp = pAig );
            Gia_ManStop( pTemp );
        }
    }
    if ( pAig )
        Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &r [-csxmnlvh] <file>\n" );
    Abc_Print( -2, "\t         reads the current AIG from the AIGER file\n" );
    Abc_Print( -2, "\t-c     : toggles reading simple AIG [default = %s]\n", fGiaSimple? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggles structural hashing while reading [default = %s]\n", !fSkipStrash? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggles detecting XORs while reading [default = %s]\n", fDetectXors? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggles reading MiniAIG rather than AIGER file [default = %s]\n", fMiniAig? "yes": "no" );
    Abc_Print( -2, "\t-n     : toggles reading MiniAIG as a set of supergates [default = %s]\n", fMiniAig2? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggles reading MiniLUT rather than AIGER file [default = %s]\n", fMiniLut? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles additional verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReadBlif( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Abc_NtkHieCecTest( char * pFileName, int fVerbose );
    Gia_Man_t * pAig;
    FILE * pFile;
    char ** pArgvNew;
    char * FileName, * pTemp;
    int nArgcNew;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "There is no file name.\n" );
        return 1;
    }

    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".blif", NULL, NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );

    pAig = Abc_NtkHieCecTest( FileName, fVerbose );
    Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &read_blif [-vh] <file>\n" );
    Abc_Print( -2, "\t         a specialized reader for hierarchical BLIF files\n" );
    Abc_Print( -2, "\t         (for general-purpose BLIFs, please use \"read_blif\")\n" );
    Abc_Print( -2, "\t-v     : toggles additional verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReadCBlif( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Abc_NtkHieCecTest2( char * pFileName, char * pModelName, int fVerbose );
    Gia_Man_t * pAig;
    FILE * pFile;
    char ** pArgvNew;
    char * FileName, * pTemp;
    char * pModelName = NULL;
    int nArgcNew;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Mvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by a file name.\n" );
                goto usage;
            }
            pModelName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "There is no file name.\n" );
        return 1;
    }

    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".cblif", NULL, NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );

    pAig = Abc_NtkHieCecTest2( FileName, pModelName, fVerbose );
    Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &read_cblif [-M name] [-vh] <file>\n" );
    Abc_Print( -2, "\t         reads CBLIF file and collapse it into an AIG\n" );
    Abc_Print( -2, "\t-M name: module name to collapse [default = <root_module>]\n" );
    Abc_Print( -2, "\t-v     : toggles additional verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReadStg( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pAig;
    FILE * pFile;
    char * FileName, ** pArgvNew;
    int c, nArgcNew;
    int kHot = 1;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Kvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            kHot = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( kHot < 1 || kHot > 5 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "There is no file name.\n" );
        return 1;
    }

    // get the input file name
    FileName = pArgvNew[0];
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        return 1;
    }
    fclose( pFile );

    pAig = Gia_ManStgRead( FileName, kHot, fVerbose );
    Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &read_stg [-K <num>] [-vh] <file>\n" );
    Abc_Print( -2, "\t         reads STG file and generates K-hot-encoded AIG\n" );
    Abc_Print( -2, "\t-K num : the K parameter for hotness of the encoding (1 <= K <= 5) [default = %d]\n", kHot );
    Abc_Print( -2, "\t-v     : toggles printing state codes [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReadVer( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Ntk_t * pNtk;
    Gia_Man_t * pAig;
    FILE * pFile;
    char ** pArgvNew;
    char * pFileName, * pTemp;
    int nArgcNew;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "There is no file name.\n" );
        return 1;
    }

    // get the input file name
    pFileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = pFileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( pFileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", pFileName );
        if ( (pFileName = Extra_FileGetSimilarName( pFileName, ".v", ".blif", NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", pFileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );
    // read hierarchical Verilog
    pNtk = Io_ReadNetlist( pFileName, Io_ReadFileType(pFileName), 0 );
    if ( pNtk == NULL )
    {
        Abc_Print( -1, "Reading hierarchical Verilog has failed.\n" );
        return 1;
    }
    pAig = Abc_NtkFlattenHierarchyGia( pNtk, NULL, fVerbose );
    Abc_NtkDelete( pNtk );
    Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &read_ver [-vh] <file>\n" );
    Abc_Print( -2, "\t         a specialized reader for hierarchical Verilog files\n" );
    Abc_Print( -2, "\t-v     : toggles additional verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Get( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Aig_Man_t * Abc_NtkToDarChoices( Abc_Ntk_t * pNtk );
    Abc_Ntk_t * pStrash;
    Aig_Man_t * pAig;
    Gia_Man_t * pGia, * pTemp;
    char * pInits;
    int c, fGiaSimple = 0, fMapped = 0, fNames = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "cmnvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fGiaSimple ^= 1;
            break;
        case 'm':
            fMapped ^= 1;
            break;
        case 'n':
            fNames ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pNtkCur == NULL )
    {
        Abc_Print( -1, "There is no current network\n" );
        return 1;
    }
    if ( !Abc_NtkIsStrash( pAbc->pNtkCur ) )
    {
        if ( fGiaSimple || fMapped )
        {
            assert( Abc_NtkIsLogic(pAbc->pNtkCur) );
            Abc_NtkToAig( pAbc->pNtkCur );
            pGia = Abc_NtkAigToGia( pAbc->pNtkCur, fGiaSimple );
        }
        else
        {
            // derive comb GIA
            pStrash = Abc_NtkStrash( pAbc->pNtkCur, 0, 1, 0 );
            pAig = Abc_NtkToDar( pStrash, 0, 0 );
            Abc_NtkDelete( pStrash );
            pGia = Gia_ManFromAig( pAig );
            Aig_ManStop( pAig );
            // perform undc/zero
            pInits = Abc_NtkCollectLatchValuesStr( pAbc->pNtkCur );
            pGia = Gia_ManDupZeroUndc( pTemp = pGia, pInits, 0, 0, fVerbose );
            Gia_ManStop( pTemp );
            ABC_FREE( pInits );
        }
    }
    else
    {
        if ( Abc_NtkGetChoiceNum(pAbc->pNtkCur) )
            pAig = Abc_NtkToDarChoices( pAbc->pNtkCur );
        else
            pAig = Abc_NtkToDar( pAbc->pNtkCur, 0, 1 );
        pGia = Gia_ManFromAig( pAig );
        Aig_ManStop( pAig );
    }
    // copy names
    if ( fNames )
    {
        pGia->vNamesIn  = Abc_NtkCollectCiNames( pAbc->pNtkCur );
        pGia->vNamesOut = Abc_NtkCollectCoNames( pAbc->pNtkCur );
    }
    // copy user timing information
    if ( pAbc->pNtkCur->pManTime != NULL )
    {
        Abc_Ntk_t * pNtk = pAbc->pNtkCur;
        Vec_FltFreeP( &pGia->vInArrs );
        Vec_FltFreeP( &pGia->vOutReqs );
        pGia->DefInArrs  = Abc_NtkReadDefaultArrivalWorst(pNtk);
        pGia->DefOutReqs = Abc_NtkReadDefaultRequiredWorst(pNtk);
        pGia->vInArrs  = Vec_FltAllocArray( Abc_NtkGetCiArrivalFloats(pNtk), Abc_NtkCiNum(pNtk) );
        pGia->vOutReqs = Vec_FltAllocArray( Abc_NtkGetCoRequiredFloats(pNtk), Abc_NtkCoNum(pNtk) );
        pGia->And2Delay = pNtk->AndGateDelay;
    }
    Abc_FrameUpdateGia( pAbc, pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &get [-cmnvh] <file>\n" );
    Abc_Print( -2, "\t         converts the current network into GIA and moves it to the &-space\n" );
    Abc_Print( -2, "\t         (if the network is a sequential logic network, normalizes the flops\n" );
    Abc_Print( -2, "\t         to have const-0 initial values, equivalent to \"undc; st; zero\")\n" );
    Abc_Print( -2, "\t-c     : toggles allowing simple GIA to be imported [default = %s]\n", fGiaSimple? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggles preserving the current mapping [default = %s]\n", fMapped? "yes": "no" );
    Abc_Print( -2, "\t-n     : toggles saving CI/CO names of the AIG [default = %s]\n", fNames? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles additional verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Put( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Abc_NtkFromDarChoices( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan );
    extern void Abc_NtkRedirectCiCo( Abc_Ntk_t * pNtk );
    extern Abc_Ntk_t * Abc_NtkFromCellMappedGia( Gia_Man_t * p, int fUseBuffs );
    extern Abc_Ntk_t * Abc_NtkFromMappedGia( Gia_Man_t * p, int fFindEnables, int fUseBuffs );

    Aig_Man_t * pMan;
    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    int fStatusClear = 1;
    int fFindEnables = 0;
    int fUseBuffs    = 0;
    int c, fVerbose  = 0;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "seovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 's':
            fStatusClear ^= 1;
            break;
        case 'e':
            fFindEnables ^= 1;
            break;
        case 'o':
            fUseBuffs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( fFindEnables )
        pNtk = Abc_NtkFromMappedGia( pAbc->pGia, 1, fUseBuffs );
    else if ( Gia_ManHasCellMapping(pAbc->pGia) )
        pNtk = Abc_NtkFromCellMappedGia( pAbc->pGia, fUseBuffs );
    else if ( Gia_ManHasMapping(pAbc->pGia) || pAbc->pGia->pMuxes )
        pNtk = Abc_NtkFromMappedGia( pAbc->pGia, 0, fUseBuffs );
    else if ( Gia_ManHasDangling(pAbc->pGia) == 0 )
    {
        pMan = Gia_ManToAig( pAbc->pGia, 0 );
        pNtk = Abc_NtkFromAigPhase( pMan );
        pNtk->pName = Extra_UtilStrsav(pMan->pName);
        Aig_ManStop( pMan );
    }
    else
    {
        Abc_Ntk_t * pNtkNoCh;
        Abc_Print( -1, "Transforming AIG with %d choice nodes.\n", Gia_ManEquivCountClasses(pAbc->pGia) );
        // create network without choices
        pMan = Gia_ManToAig( pAbc->pGia, 0 );
        pNtkNoCh = Abc_NtkFromAigPhase( pMan );
        pNtkNoCh->pName = Extra_UtilStrsav(pMan->pName);
        Aig_ManStop( pMan );
        // derive network with choices
        pMan = Gia_ManToAig( pAbc->pGia, 1 );
        pNtk = Abc_NtkFromDarChoices( pNtkNoCh, pMan );
        Abc_NtkDelete( pNtkNoCh );
        Aig_ManStop( pMan );
    }
    // transfer PI names to pNtk
    if ( pAbc->pGia->vNamesIn )
    {
        Abc_Obj_t * pObj;
        int i;
        Abc_NtkForEachCi( pNtk, pObj, i ) {
            if (i < Vec_PtrSize(pAbc->pGia->vNamesIn)) {
                Nm_ManDeleteIdName(pNtk->pManName, pObj->Id);
                Abc_ObjAssignName( pObj, (char *)Vec_PtrEntry(pAbc->pGia->vNamesIn, i), NULL );
            }
        }
    }
    // transfer PO names to pNtk
    if ( pAbc->pGia->vNamesOut )
    {
        char pSuffix[1000];
        Abc_Obj_t * pObj; int i;
        unsigned char nDigits = (unsigned char)Abc_Base10Log( Abc_NtkLatchNum(pNtk) );
        Abc_NtkForEachCo( pNtk, pObj, i ) {
            if (i < Vec_PtrSize(pAbc->pGia->vNamesOut)) {
                Nm_ManDeleteIdName(pNtk->pManName, pObj->Id);
                if ( Abc_ObjIsPo(pObj) )
                    Abc_ObjAssignName( pObj, (char *)Vec_PtrEntry(pAbc->pGia->vNamesOut, i), NULL );
                else
                {
                    assert( i >= Abc_NtkPoNum(pNtk) );
                    sprintf( pSuffix, "_li%0*d", nDigits, i-Abc_NtkPoNum(pNtk) );
                    Abc_ObjAssignName( pObj, (char *)Vec_PtrEntry(pAbc->pGia->vNamesOut, i), pSuffix );
                }
            }
        }
    }
    if ( pAbc->pGia->vNamesNode )
        Abc_Print( 0, "Internal nodes names are not transferred.\n" );

    // decouple CI/CO with the same name
    if ( pAbc->pGia->vNamesIn || pAbc->pGia->vNamesOut )
        Abc_NtkRedirectCiCo( pNtk );

    // transfer timing information
    if ( pAbc->pGia->vInArrs || pAbc->pGia->vOutReqs )
    {
        Abc_Obj_t * pObj; int i;
        Abc_NtkTimeInitialize( pNtk, NULL );
        Abc_NtkTimeSetDefaultArrival( pNtk, pAbc->pGia->DefInArrs, pAbc->pGia->DefInArrs );
        Abc_NtkTimeSetDefaultRequired( pNtk, pAbc->pGia->DefOutReqs, pAbc->pGia->DefOutReqs );
        if ( pAbc->pGia->vInArrs )
            Abc_NtkForEachCi( pNtk, pObj, i )
                Abc_NtkTimeSetArrival( pNtk, Abc_ObjId(pObj), Vec_FltEntry(pAbc->pGia->vInArrs, i), Vec_FltEntry(pAbc->pGia->vInArrs, i) );
        if ( pAbc->pGia->vOutReqs )
            Abc_NtkForEachCo( pNtk, pObj, i )
                Abc_NtkTimeSetRequired( pNtk, Abc_ObjId(pObj), Vec_FltEntry(pAbc->pGia->vOutReqs, i), Vec_FltEntry(pAbc->pGia->vOutReqs, i) );
    }

    // replace the current network
    Abc_FrameReplaceCurrentNetwork( pAbc, pNtk );
    if ( fStatusClear )
        Abc_FrameClearVerifStatus( pAbc );
    return 0;

usage:
    Abc_Print( -2, "usage: &put [-seovh]\n" );
    Abc_Print( -2, "\t         transfer the current network into the old ABC\n" );
    Abc_Print( -2, "\t-s     : toggle clearning verification status [default = %s]\n", fStatusClear? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle extracting MUXes for flop enables [default = %s]\n", fFindEnables? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggles using buffers to decouple combinational outputs [default = %s]\n", fUseBuffs? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MoveNames( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pNtkCur == NULL )
    {
        Abc_Print( -1, "There is no current network\n" );
        return 1;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "There is no current AIG.\n" );
        return 1;
    }
    if ( Gia_ManCiNum(pAbc->pGia) != Abc_NtkCiNum(pAbc->pNtkCur) )
    {
        Abc_Print( -1, "The number of CIs does not match.\n" );
        return 1;
    }
    if ( Gia_ManCoNum(pAbc->pGia) != Abc_NtkCoNum(pAbc->pNtkCur) )
    {
        Abc_Print( -1, "The number of COs does not match.\n" );
        return 1;
    }
    if ( pAbc->pGia->vNamesIn  )    Vec_PtrFreeFree( pAbc->pGia->vNamesIn );
    if ( pAbc->pGia->vNamesOut )    Vec_PtrFreeFree( pAbc->pGia->vNamesOut );
    pAbc->pGia->vNamesIn  = Abc_NtkCollectCiNames( pAbc->pNtkCur );
    pAbc->pGia->vNamesOut = Abc_NtkCollectCoNames( pAbc->pNtkCur );
    return 0;

usage:
    Abc_Print( -2, "usage: &move_names [-vh]\n" );
    Abc_Print( -2, "\t         move CI/CO names\n" );
    Abc_Print( -2, "\t-v     : toggles additional verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    [Compares to versions of the design and finds the best.]

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
static inline int Gia_ManCompareWithBest( Gia_Man_t * pBest, Gia_Man_t * p, int * pnBestLuts, int * pnBestEdges, int * pnBestLevels, int fArea )
{
    int nCurLuts, nCurEdges, nCurLevels;
    Gia_ManLutParams( p, &nCurLuts, &nCurEdges, &nCurLevels );
    if ( pBest == NULL ||
         Gia_ManPiNum(pBest) != Gia_ManPiNum(p) ||
         Gia_ManPoNum(pBest) != Gia_ManPoNum(p) ||
         Gia_ManRegNum(pBest) != Gia_ManRegNum(p) ||
         strcmp(Gia_ManName(pBest), Gia_ManName(p)) ||
         (!fArea && (*pnBestLevels > nCurLevels || (*pnBestLevels == nCurLevels && 2*(*pnBestLuts) + *pnBestEdges > 2*nCurLuts + nCurEdges))) ||
         ( fArea && (*pnBestLuts   > nCurLuts   || (*pnBestLuts   == nCurLuts   && *pnBestLevels > nCurLevels)))
       )
    {
        *pnBestLuts = nCurLuts;
        *pnBestEdges = nCurEdges;
        *pnBestLevels = nCurLevels;
        //printf( "\nUpdating best (%d %d %d).\n\n", nCurLuts, nCurEdges, nCurLevels );
        return 1;
    }
    return 0;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Save( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fArea = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ah" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fArea ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "GIA has no mapping.\n" );
        return 1;
    }
    if ( !Gia_ManCompareWithBest( pAbc->pGiaBest, pAbc->pGia, &pAbc->nBestLuts, &pAbc->nBestEdges, &pAbc->nBestLevels, fArea ) )
        return 0;
    // save the design as best
    Gia_ManStopP( &pAbc->pGiaBest );
    pAbc->pGiaBest = Gia_ManDupWithAttributes( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &save [-ah]\n" );
    Abc_Print( -2, "\t        compares and possibly saves AIG with mapping\n" );
    Abc_Print( -2, "\t-a    : toggle using area as the primary metric [default = %s]\n", fArea? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Save2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fArea = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ah" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fArea ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "GIA has no mapping.\n" );
        return 1;
    }
    if ( !Gia_ManCompareWithBest( pAbc->pGiaBest2, pAbc->pGia, &pAbc->nBestLuts2, &pAbc->nBestEdges2, &pAbc->nBestLevels2, fArea ) )
        return 0;
    // save the design as best
    Gia_ManStopP( &pAbc->pGiaBest2 );
    pAbc->pGiaBest2 = Gia_ManDupWithAttributes( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &save2 [-ah]\n" );
    Abc_Print( -2, "\t        compares and possibly saves AIG with mapping\n" );
    Abc_Print( -2, "\t-a    : toggle using area as the primary metric [default = %s]\n", fArea? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SaveAig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fArea = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ah" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fArea ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty network.\n" );
        return 1;
    }
    if ( fArea && pAbc->pGiaSaved != NULL && Gia_ManAndNum(pAbc->pGiaSaved) <= Gia_ManAndNum(pAbc->pGia) )
        return 0;
    // save the design as best
    Gia_ManStopP( &pAbc->pGiaSaved );
    pAbc->pGiaSaved = Gia_ManDupWithAttributes( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &saveaig [-ah]\n" );
    Abc_Print( -2, "\t        saves the current AIG into the internal storage\n" );
    Abc_Print( -2, "\t-a    : toggle saving AIG with the smaller area [default = %s]\n", fArea? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Load( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    // restore from best
    if ( pAbc->pGiaBest == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Load(): There is no best design saved.\n" );
        return 1;
    }
    Gia_ManStopP( &pAbc->pGia );
    pAbc->pGia = Gia_ManDupWithAttributes( pAbc->pGiaBest );
    return 0;

usage:
    Abc_Print( -2, "usage: &load [-h]\n" );
    Abc_Print( -2, "\t        loads AIG with mapping previously saved by &save\n" );
    Abc_Print( -2, "\t        (after loading the previously saved AIG can be loaded again)\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Load2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    // restore from best
    if ( pAbc->pGiaBest2 == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Load2(): There is no best design saved.\n" );
        return 1;
    }
    Gia_ManStopP( &pAbc->pGia );
    pAbc->pGia = pAbc->pGiaBest2;
    pAbc->pGiaBest2 = NULL;
    pAbc->nBestLuts2 = 0;
    pAbc->nBestEdges2 = 0;
    pAbc->nBestLevels2 = 0;
    return 0;

usage:
    Abc_Print( -2, "usage: &load2 [-h]\n" );
    Abc_Print( -2, "\t        loads AIG with mapping previously saved by &save2\n" );
    Abc_Print( -2, "\t        (after loading the previously saved AIG cannot be loaded again)\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9LoadAig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    // restore from best
    if ( pAbc->pGiaSaved == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9LoadAig(): There is no design saved.\n" );
        return 1;
    }
    Gia_ManStopP( &pAbc->pGia );
    pAbc->pGia = Gia_ManDupWithAttributes( pAbc->pGiaSaved );
    return 0;

usage:
    Abc_Print( -2, "usage: &loadaig [-h]\n" );
    Abc_Print( -2, "\t        loads AIG previously saved by &saveaig\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9WriteVer( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * pFileSpec = NULL;
    Abc_Ntk_t * pNtkSpec = NULL;
    char * pFileName;
    char ** pArgvNew;
    int c, nArgcNew;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Svh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a file name.\n" );
                goto usage;
            }
            pFileSpec = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "Expecting output file name on the command line.\n" );
        return 1;
    }
    pFileName = argv[globalUtilOptind];
    if ( pAbc->pNtkCur == NULL )
    {
        Abc_Print( -1, "There is no mapped file to write.\n" );
        return 1;
    }
    if ( pFileSpec == NULL )
    {
        Abc_Print( -1, "The specification file is not given.\n" );
        return 1;
    }
    pNtkSpec = Io_ReadNetlist( pFileSpec, Io_ReadFileType(pFileSpec), 0 );
    if ( pNtkSpec == NULL )
    {
        Abc_Print( -1, "Reading hierarchical Verilog for the specification has failed.\n" );
        return 1;
    }
    Abc_NtkInsertHierarchyGia( pNtkSpec, pAbc->pNtkCur, fVerbose );
    Io_WriteVerilog( pNtkSpec, pFileName, 0 );
    Abc_NtkDelete( pNtkSpec );
    return 0;

usage:
    Abc_Print( -2, "usage: &write_ver [-S <file>] [-vh] <file>\n" );
    Abc_Print( -2, "\t          writes hierarchical Verilog after mapping\n" );
    Abc_Print( -2, "\t-S file : file name for the original hierarchical design (required)\n" );
    Abc_Print( -2, "\t-v      : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    Abc_Print( -2, "\t<file>  : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Write( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * pFileName;
    char ** pArgvNew;
    int c, nArgcNew;
    int fUnique = 0;
    int fVerilog = 0;
    int fVerBufs = 0;
    int fMiniAig = 0;
    int fMiniLut = 0;
    int fWriteNewLine = 0;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "upbmlnvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'u':
            fUnique ^= 1;
            break;
        case 'p':
            fVerilog ^= 1;
            break;
        case 'b':
            fVerBufs ^= 1;
            break;
        case 'm':
            fMiniAig ^= 1;
            break;
        case 'l':
            fMiniLut ^= 1;
            break;
        case 'n':
            fWriteNewLine ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "There is no file name.\n" );
        return 1;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Write(): There is no AIG to write.\n" );
        return 1;
    }
    pFileName = argv[globalUtilOptind];
    if ( fUnique )
    {
        Gia_Man_t * pGia = Gia_ManIsoCanonicize( pAbc->pGia, fVerbose );
        Gia_AigerWriteSimple( pGia, pFileName );
        Gia_ManStop( pGia );
    }
    else if ( fVerilog )
        Gia_ManDumpVerilog( pAbc->pGia, pFileName, NULL, fVerBufs );
    else if ( fMiniAig )
        Gia_ManWriteMiniAig( pAbc->pGia, pFileName );
    else if ( fMiniLut )
        Gia_ManWriteMiniLut( pAbc->pGia, pFileName );
    else
        Gia_AigerWrite( pAbc->pGia, pFileName, 0, 0, fWriteNewLine );
    return 0;

usage:
    Abc_Print( -2, "usage: &w [-upbmlnvh] <file>\n" );
    Abc_Print( -2, "\t         writes the current AIG into the AIGER file\n" );
    Abc_Print( -2, "\t-u     : toggle writing canonical AIG structure [default = %s]\n", fUnique? "yes" : "no" );
    Abc_Print( -2, "\t-p     : toggle writing Verilog with 'and' and 'not' [default = %s]\n", fVerilog? "yes" : "no" );
    Abc_Print( -2, "\t-b     : toggle writing additional buffers in Verilog [default = %s]\n", fVerBufs? "yes" : "no" );
    Abc_Print( -2, "\t-m     : toggle writing MiniAIG rather than AIGER [default = %s]\n", fMiniAig? "yes" : "no" );
    Abc_Print( -2, "\t-l     : toggle writing MiniLUT rather than AIGER [default = %s]\n", fMiniLut? "yes" : "no" );
    Abc_Print( -2, "\t-n     : toggle writing \'\\n\' after \'c\' in the AIGER file [default = %s]\n", fWriteNewLine? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9WriteLut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_AigerWriteLut( Gia_Man_t * pGia, char * pFileName );
    char * pFileName;
    char ** pArgvNew;
    int c, nArgcNew;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "There is no file name.\n" );
        return 1;
    }
    pFileName = argv[globalUtilOptind];
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9WriteLut(): There is no AIG to write.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9WriteLut(): AIG has no mapping.\n" );
        return 1;
    }
    Gia_AigerWriteLut( pAbc->pGia, pFileName );
    return 0;

usage:
    Abc_Print( -2, "usage: &wlut [-umvh] <file>\n" );
    Abc_Print( -2, "\t         writes the the current LUT mapping into a binary file\n" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : the file name\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Ps( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gps_Par_t Pars, * pPars = &Pars;
    int c, fBest = 0;
    memset( pPars, 0, sizeof(Gps_Par_t) );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Dtpcnlmaszxbh" ) ) != EOF )
    {
        switch ( c )
        {
        case 't':
            pPars->fTents ^= 1;
            break;
        case 'p':
            pPars->fSwitch ^= 1;
            break;
        case 'c':
            pPars->fCut ^= 1;
            break;
        case 'n':
            pPars->fNpn ^= 1;
            break;
        case 'l':
            pPars->fLutProf ^= 1;
            break;
        case 'm':
            pPars->fMuxXor ^= 1;
            break;
        case 'a':
            pPars->fMiter ^= 1;
            break;
        case 's':
            pPars->fSlacks ^= 1;
            break;
        case 'z':
            pPars->fSkipMap ^= 1;
            break;
        case 'x':
            pPars->fNoColor ^= 1;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a file name.\n" );
                goto usage;
            }
            pPars->pDumpFile = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'b':
            fBest ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( fBest )
    {
        if ( pAbc->pGiaBest == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Ps(): There is no AIG.\n" );
            return 1;
        }
        Gia_ManPrintStats( pAbc->pGiaBest, pPars );
    }
    else
    {
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Ps(): There is no AIG.\n" );
            return 1;
        }
        Gia_ManPrintStats( pAbc->pGia, pPars );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &ps [-tpcnlmaszxbh] [-D file]\n" );
    Abc_Print( -2, "\t          prints stats of the current AIG\n" );
    Abc_Print( -2, "\t-t      : toggle printing BMC tents [default = %s]\n",                pPars->fTents? "yes": "no" );
    Abc_Print( -2, "\t-p      : toggle printing switching activity [default = %s]\n",       pPars->fSwitch? "yes": "no" );
    Abc_Print( -2, "\t-c      : toggle printing the size of frontier cut [default = %s]\n", pPars->fCut? "yes": "no" );
    Abc_Print( -2, "\t-n      : toggle printing NPN classes of functions [default = %s]\n", pPars->fNpn? "yes": "no" );
    Abc_Print( -2, "\t-l      : toggle printing LUT size profile [default = %s]\n",         pPars->fLutProf? "yes": "no" );
    Abc_Print( -2, "\t-m      : toggle printing MUX/XOR statistics [default = %s]\n",       pPars->fMuxXor? "yes": "no" );
    Abc_Print( -2, "\t-a      : toggle printing miter statistics [default = %s]\n",         pPars->fMiter? "yes": "no" );
    Abc_Print( -2, "\t-s      : toggle printing slack distribution [default = %s]\n",       pPars->fSlacks? "yes": "no" );
    Abc_Print( -2, "\t-z      : skip mapping statistics even if mapped [default = %s]\n",   pPars->fSkipMap? "yes": "no" );
    Abc_Print( -2, "\t-n      : toggle using no color in the printout [default = %s]\n",    pPars->fNoColor? "yes": "no" );
    Abc_Print( -2, "\t-x      : toggle printing saved AIG statistics [default = %s]\n",     fBest? "yes": "no" );
    Abc_Print( -2, "\t-D file : file name to dump statistics [default = none]\n" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9PFan( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    int nNodes = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodes < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9PFan(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManPrintFanio( pAbc->pGia, nNodes );
    return 0;

usage:
    Abc_Print( -2, "usage: &pfan [-N num] [-h]\n" );
    Abc_Print( -2, "\t         prints fanin/fanout statistics\n" );
    Abc_Print( -2, "\t-N num : the number of high-fanout nodes to explore [default = %d]\n", nNodes );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9PSig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    int fSetReset = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "rh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'r':
            fSetReset ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9PSigs(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9PSigs(): Works only for sequential circuits.\n" );
        return 1;
    }
    Gia_ManDetectSeqSignals( pAbc->pGia, fSetReset, 1 );
    return 0;

usage:
    Abc_Print( -2, "usage: &psig [-rh]\n" );
    Abc_Print( -2, "\t         prints enable/set/reset statistics\n" );
    Abc_Print( -2, "\t-r     : toggle printing set/reset signals [default = %s]\n", fSetReset? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Status( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Status(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManPrintMiterStatus( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &status [-h]\n" );
    Abc_Print( -2, "\t         prints status of the miter\n" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MuxProfile( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManMuxProfiling( Gia_Man_t * p );
    extern void Gia_ManProfileStructures( Gia_Man_t * p, int nLimit, int fVerbose );
    extern void Acec_StatsCollect( Gia_Man_t * p, int fVerbose );
    extern void Acec_ManProfile( Gia_Man_t * p, int fVerbose );
    int c, fNpn = 0, fMuxes = 0, fAdders = 0, nLimit = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nnmavh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLimit < 0 )
                goto usage;
            break;
        case 'n':
            fNpn ^= 1;
            break;
        case 'm':
            fMuxes ^= 1;
            break;
        case 'a':
            fAdders ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9MuxProfile(): There is no AIG.\n" );
        return 1;
    }
    if ( fNpn )
    {
        if ( !Gia_ManHasMapping(pAbc->pGia) || Gia_ManLutSizeMax(pAbc->pGia) >= 4 )
        {
            Abc_Print( -1, "Abc_CommandAbc9MuxProfile(): Expecting AIG mapped into 3-LUTs.\n" );
            return 1;
        }
        Acec_StatsCollect( pAbc->pGia, fVerbose );
    }
    else if ( fMuxes )
        Gia_ManMuxProfiling( pAbc->pGia );
    else if ( fAdders )
        Acec_ManProfile( pAbc->pGia, fVerbose );
    else
        Gia_ManProfileStructures( pAbc->pGia, nLimit, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &profile [-N num] [-nmavh]\n" );
    Abc_Print( -2, "\t         profile gate structures appearing in the AIG\n" );
    Abc_Print( -2, "\t-N num : limit on class size to show [default = %d]\n", nLimit );
    Abc_Print( -2, "\t-n     : toggle profiling NPN-classes (for 3-LUT mapped AIGs) [default = %s]\n", fNpn? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle profiling MUX structures [default = %s]\n", fMuxes? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle profiling adder structures [default = %s]\n", fAdders? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MuxPos( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManDupWithMuxPos( Gia_Man_t * p );
    Gia_Man_t * pGia;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9MuxPos(): There is no AIG.\n" );
        return 1;
    }
    pGia = Gia_ManDupWithMuxPos( pAbc->pGia );
    Abc_FrameUpdateGia( pAbc, pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &muxpos [-vh]\n" );
    Abc_Print( -2, "\t         create additional POs to preserve MUXes\n" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MuxStr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManCofStructure( Gia_Man_t * p );
    Gia_Man_t * pGia;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9MuxStr(): There is no AIG.\n" );
        return 1;
    }
    pGia = Gia_ManCofStructure( pAbc->pGia );
    Abc_FrameUpdateGia( pAbc, pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &muxstr [-vh]\n" );
    Abc_Print( -2, "\t         performs restructuring\n" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MuxDec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManPerformMuxDec( Gia_Man_t * p );
    Gia_Man_t * pGia;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9MuxDec(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManCiNum(pAbc->pGia) <= 6 || Gia_ManCiNum(pAbc->pGia) > 26 )
    {
        Abc_Print( -1, "Abc_CommandAbc9MuxDec(): The number of inputs is wrong.\n" );
        return 1;
    }
    pGia = Gia_ManPerformMuxDec( pAbc->pGia );
    Abc_FrameUpdateGia( pAbc, pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &muxdec [-vh]\n" );
    Abc_Print( -2, "\t         performs restructuring\n" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9PrintTruth( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern word Gia_LutComputeTruth6Simple( Gia_Man_t * p, int iPo );
    int i, c, iOutNum = 0, nOutRange = -1, fVerbose = 0; word Truth;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ORvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            iOutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iOutNum < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nOutRange = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOutRange < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9PrintTruth(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManPiNum(pAbc->pGia) > 6 )
    {
        Abc_Print( -1, "The number of inputs of the AIG exceeds 6.\n" );
        return 1;
    }
    if ( iOutNum < 0 || iOutNum + nOutRange > Gia_ManPoNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9PrintTruth(): Range of outputs to extract is incorrect.\n" );
        return 1;
    }
    if ( nOutRange == -1 )
        nOutRange = Gia_ManCoNum(pAbc->pGia);
    for ( i = iOutNum; i < iOutNum + nOutRange; i++ )
    {
        Truth = Gia_LutComputeTruth6Simple( pAbc->pGia, i );
        printf( "Output %8d : ", i );
        Extra_PrintHex( stdout, (unsigned *)&Truth, Gia_ManCiNum(pAbc->pGia) );
        printf( "\n" );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &print_truth [-OR num] [-vh]\n" );
    Abc_Print( -2, "\t         prints truth tables of outputs in hex notation\n" );
    Abc_Print( -2, "\t-O num : the index of first PO to print [default = %d]\n", iOutNum );
    Abc_Print( -2, "\t-R num : (optional) the number of outputs to extract [default = all]\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Unate( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManCheckUnateTest( Gia_Man_t * p, int fComputeAll, int fVerbose );
    int c, fComputeAll = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "avh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fComputeAll ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Unate(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManCheckUnateTest( pAbc->pGia, fComputeAll, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &unate [-avh]\n" );
    Abc_Print( -2, "\t         prints info about unatements of CO funcs in terms of CI vars\n" );
    Abc_Print( -2, "\t-a     : toggle using efficient computation for all pairs [default = %s]\n", fComputeAll? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Rex2Gia( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManRex2Gia( char * pStr, int fOrder, int fVerbose );
    Gia_Man_t * pGia = NULL;
    char * pStr = NULL;
    char ** pArgvNew;
    int nArgcNew;
    int c, fOrder = 1, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "avh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fOrder ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "No regular expression is entered on the command line.\n" );
        return 1;
    }
    pStr = pArgvNew[0];
    pGia = Gia_ManRex2Gia( pStr, fOrder, fVerbose );
    if ( pGia )
        Abc_FrameUpdateGia( pAbc, pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &rex2gia [-avh] [string]\n" );
    Abc_Print( -2, "\t         converts a regular expression into a sequential AIG\n" );
    Abc_Print( -2, "\t-a     : toggle ordering input symbols alphabetically [default = %s]\n", fOrder? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tstring : representation of a regular expression\n");
    Abc_Print( -2, "\t         Special symbols: parentheses \'(\' and \')\', Kleene closure \'*\', union \'|'\n");
    Abc_Print( -2, "\t         All other characters are treated as symbols of the input alphabet.\n");
    Abc_Print( -2, "\t         For example, ((A*B|AC)D) is defined over the alphabet {A, B, C, D}\n");
    Abc_Print( -2, "\t         and generates the following language: {BD, ABD, AABD, AAABD, ..., ACD}\n");
    Abc_Print( -2, "\t         A known limitation:  For the command to work correctly, each two-input union\n");
    Abc_Print( -2, "\t         should have a dedicated pair of parentheses: ((A|B)|C) rather than (A|B|C)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9RexWalk( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManAutomWalk( Gia_Man_t * p, int nSteps, int nWalks, int fVerbose );
    int c, nSteps = 50, nWalks = 5, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "SRvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nSteps = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSteps < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nWalks = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWalks < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Show(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManAutomWalk( pAbc->pGia, nSteps, nWalks, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &rexwalk [-SR] [-vh]\n" );
    Abc_Print( -2, "\t         performs simulation of an AIG representing a regular expression\n" );
    Abc_Print( -2, "\t-S num : the number of steps to take [default = %d]\n", nSteps );
    Abc_Print( -2, "\t-R num : the number of walks to make [default = %d]\n", nWalks );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Show( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Vec_Int_t * vBold = NULL;
    int c, fAdders = 0, fFadds = 0, fPath = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "afph" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fAdders ^= 1;
            break;
        case 'f':
            fFadds ^= 1;
            break;
        case 'p':
            fPath ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Show(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManBufNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Show(): Cannot show GIA with barrier buffers.\n" );
        return 1;
    }
    if ( !fAdders && Gia_ManHasMapping(pAbc->pGia) )
    {
        vBold = Vec_IntAlloc( 100 );
        Gia_ManForEachLut( pAbc->pGia, c )
            Vec_IntPush( vBold, c );
    }
    Gia_ManShow( pAbc->pGia, vBold, fAdders, fFadds, fPath );
    Vec_IntFreeP( &vBold );
    return 0;

usage:
    Abc_Print( -2, "usage: &show [-afph]\n" );
    Abc_Print( -2, "\t        shows the current GIA using GSView\n" );
    Abc_Print( -2, "\t-a    : toggle visualazing adders [default = %s]\n", fAdders? "yes": "no" );
    Abc_Print( -2, "\t-f    : toggle showing only full-adders with \"-a\" [default = %s]\n", fFadds? "yes": "no" );
    Abc_Print( -2, "\t-p    : toggle showing the critical path of a LUT mapping [default = %s]\n", fPath? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SetRegNum( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, nRegNum = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nRegNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRegNum < 0 )
                goto usage;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SetRegNum(): There is no AIG.\n" );
        return 1;
    }
    if ( nRegNum >= Gia_ManCiNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9SetRegNum(): The number of registers should be less than the number of CIs.\n" );
        return 1;
    }
    if ( nRegNum >= Gia_ManCoNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9SetRegNum(): The number of registers should be less than the number of COs.\n" );
        return 1;
    }
    pAbc->pGia->nRegs = nRegNum;
    return 0;

usage:
    Abc_Print( -2, "usage: &setregnum [-N num] [-h]\n" );
    Abc_Print( -2, "\t         manually sets the number of registers to combine the last PI/PO pairs\n" );
    Abc_Print( -2, "\t-N num : set the number of registers to be the given number [default = %d]\n", nRegNum );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Strash( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManDupMuxRestructure( Gia_Man_t * p );
    Gia_Man_t * pTemp;
    int c, Limit = 2;
    int Multi = 0;
    int fAddBuffs  = 0;
    int fAddStrash = 0;
    int fCollapse  = 0;
    int fAddMuxes  = 0;
    int fStrMuxes  = 0;
    int fRehashMap = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "LMbacmrsh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            Limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Limit < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            Multi = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Multi <= 0 )
                goto usage;
            break;
        case 'b':
            fAddBuffs ^= 1;
            break;
        case 'a':
            fAddStrash ^= 1;
            break;
        case 'c':
            fCollapse ^= 1;
            break;
        case 'm':
            fAddMuxes ^= 1;
            break;
        case 'r':
            fRehashMap ^= 1;
            break;
        case 's':
            fStrMuxes ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Strash(): There is no AIG.\n" );
        return 1;
    }
    if ( fAddBuffs )
    {
        extern Gia_Man_t * Gia_ManDupAddBufs( Gia_Man_t * p );
        pTemp = Gia_ManDupAddBufs( pAbc->pGia );
        Abc_FrameUpdateGia( pAbc, pTemp );
        return 0;
    }
    if ( Multi > 0 )
    {
        extern Gia_Man_t * Gia_ManDupAddPis( Gia_Man_t * p, int nMulti );
        pTemp = Gia_ManDupAddPis( pAbc->pGia, Multi );
        Abc_FrameUpdateGia( pAbc, pTemp );
        return 0;
    }
    if ( fStrMuxes )
    {
        if ( Gia_ManHasMapping(pAbc->pGia) )
            Abc_Print( 0, "Restructing the current AIG destroys the LUT mapping.\n" );
        Vec_IntFreeP( &pAbc->pGia->vMapping );
        pTemp = Gia_ManDupMuxRestructure( pAbc->pGia );
        Abc_Print( 1, "Finished AIG restructing to enable efficient mapping of 4:1 MUXes into 4-LUTs.\n" );
    }
    else if ( Gia_ManHasMapping(pAbc->pGia) && fRehashMap )
    {
        pTemp = Gia_ManDupHashMapping( pAbc->pGia );
        Gia_ManTransferPacking( pTemp, pAbc->pGia );
        Gia_ManTransferTiming( pTemp, pAbc->pGia );
    }
    else if ( Gia_ManHasMapping(pAbc->pGia) && pAbc->pGia->vConfigs )
        pTemp = (Gia_Man_t *)If_ManDeriveGiaFromCells( pAbc->pGia );
    else if ( Gia_ManHasMapping(pAbc->pGia) )
        pTemp = (Gia_Man_t *)Dsm_ManDeriveGia( pAbc->pGia, fAddMuxes ); // delay-oriented unmapping
    else if ( fAddMuxes )
    {
        if ( pAbc->pGia->pMuxes )
        {
            Abc_Print( -1, "Abc_CommandAbc9Strash(): The AIG already has MUXes.\n" );
            return 1;
        }
        pTemp = Gia_ManDupMuxes( pAbc->pGia, Limit );
        if ( !Abc_FrameReadFlag("silentmode") )
            printf( "Generated AND/XOR/MUX graph.\n" );
    }
    else if ( fCollapse && pAbc->pGia->pAigExtra )
    {
        assert( !Gia_ManBufNum(pAbc->pGia) );
        if ( Gia_ManIsSeqWithBoxes(pAbc->pGia) || Gia_ManRegBoxNum(pAbc->pGia) )
        {
            Gia_Man_t * pUnshuffled = Gia_ManDupUnshuffleInputs( pAbc->pGia );
            Gia_ManTransferTiming( pUnshuffled, pAbc->pGia );
            pTemp = Gia_ManDupCollapse( pUnshuffled, pUnshuffled->pAigExtra, NULL, Gia_ManRegBoxNum(pUnshuffled) > 0 );
            Gia_ManTransferTiming( pAbc->pGia, pUnshuffled );
            Gia_ManStop( pUnshuffled );
        }
        else
            pTemp = Gia_ManDupCollapse( pAbc->pGia, pAbc->pGia->pAigExtra, NULL, 0 );
        if ( !Abc_FrameReadFlag("silentmode") )
            printf( "Collapsed AIG with boxes and logic of the boxes.\n" );
    }
    else if ( pAbc->pGia->pMuxes )
    {
        pTemp = Gia_ManDupNoMuxes( pAbc->pGia, 0 );
        if ( !Abc_FrameReadFlag("silentmode") )
            printf( "Generated AIG from AND/XOR/MUX graph.\n" );
    }
    else
    {
        pTemp = Gia_ManRehash( pAbc->pGia, fAddStrash );
//        if ( !Abc_FrameReadFlag("silentmode") )
//            printf( "Rehashed the current AIG.\n" );
    }
    if ( !(fCollapse && pAbc->pGia->pAigExtra) )
    {
        Gia_ManTransferTiming( pTemp, pAbc->pGia );
        pAbc->pGia->vConfigs = pTemp->vConfigs;     pTemp->vConfigs = NULL;
        pAbc->pGia->pCellStr = pTemp->pCellStr;     pTemp->pCellStr = NULL;
    }
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &st [-LM num] [-bacmrsh]\n" );
    Abc_Print( -2, "\t         performs structural hashing\n" );
    Abc_Print( -2, "\t-b     : toggle adding buffers at the inputs and outputs [default = %s]\n", fAddBuffs? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle additional hashing [default = %s]\n", fAddStrash? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle collapsing hierarchical AIG [default = %s]\n", fCollapse? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle converting to larger gates [default = %s]\n", fAddMuxes? "yes": "no" );
    Abc_Print( -2, "\t-L num : create MUX when sum of refs does not exceed this limit [default = %d]\n", Limit );
    Abc_Print( -2, "\t         (use L = 1 to create AIG with XORs but without MUXes)\n" );
    Abc_Print( -2, "\t-M num : create an AIG with additional primary inputs [default = %d]\n", Multi );
    Abc_Print( -2, "\t-r     : toggle rehashing AIG while preserving mapping [default = %s]\n", fRehashMap? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle using MUX restructuring [default = %s]\n", fStrMuxes? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Topand( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fVerbose = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Topand(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Topand(): Can only be applied to a combinational miter.\n" );
        return 1;
    }
    pTemp = Gia_ManDupTopAnd( pAbc->pGia, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &topand [-vh]\n" );
    Abc_Print( -2, "\t        performs AND decomposition for combinational miter\n" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Add1Hot( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fVerbose = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Add1Hot(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManDupOneHot( pAbc->pGia );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &add1hot [-vh]\n" );
    Abc_Print( -2, "\t        adds 1-hotness constraints as additional primary outputs\n" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Cof( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManComputeCofs( Gia_Man_t * p, int nVars );
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    int iVar = 0, nLimFan = 0, nVars = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "VLNvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer.\n" );
                goto usage;
            }
            iVar = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iVar < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLimFan = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLimFan < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cof(): There is no AIG.\n" );
        return 1;
    }
    if ( nVars )
    {
        Abc_Print( 0, "Cofactoring the last %d inputs.\n", nVars );
        pTemp = Gia_ManComputeCofs( pAbc->pGia, nVars );
        Abc_FrameUpdateGia( pAbc, pTemp );
    }
    else if ( nLimFan )
    {
        Abc_Print( 0, "Cofactoring all variables whose fanout count is higher than %d.\n", nLimFan );
        pTemp = Gia_ManDupCofAll( pAbc->pGia, nLimFan, fVerbose );
        Abc_FrameUpdateGia( pAbc, pTemp );
    }
    else if ( iVar )
    {
        Abc_Print( 0, "Cofactoring one variable with object ID %d.\n", iVar );
        pTemp = Gia_ManDupCof( pAbc->pGia, iVar );
        Abc_FrameUpdateGia( pAbc, pTemp );
    }
    else
    {
        Abc_Print( -1, "One of the parameters, -V <num> or -L <num>, should be set on the command line.\n" );
        goto usage;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &cof [-VLN num] [-vh]\n" );
    Abc_Print( -2, "\t         performs cofactoring w.r.t. variable(s)\n" );
    Abc_Print( -2, "\t-V num : the zero-based ID of one variable to cofactor [default = %d]\n", iVar );
    Abc_Print( -2, "\t-L num : cofactor vars with fanout count higher than this [default = %d]\n", nLimFan );
    Abc_Print( -2, "\t-N num : cofactoring the given number of last input variables [default = %d]\n", nVars );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Trim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp, * pTemp2;
    int c;
    int OutValue = -1;
    int fTrimCis = 1;
    int fTrimCos = 1;
    int fDualOut = 0;
    int fPoFedByPi = 0;
    int fPoFedByPo = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Viocpdh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer.\n" );
                goto usage;
            }
            OutValue = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( OutValue < 0 )
                goto usage;
            break;
        case 'i':
            fTrimCis ^= 1;
            break;
        case 'o':
            fTrimCos ^= 1;
            break;
        case 'c':
            fPoFedByPi ^= 1;
            break;
        case 'p':
            fPoFedByPo ^= 1;
            break;
        case 'd':
            fDualOut ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Trim(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManDupTrimmed( pAbc->pGia, fTrimCis, fTrimCos, fDualOut, OutValue );
    if ( fPoFedByPi )
    {
        extern Gia_Man_t * Gia_ManDupTrimmed2( Gia_Man_t * p );
        pTemp = Gia_ManDupTrimmed2( pTemp2 = pTemp );
        Gia_ManStop( pTemp2 );
    }
    if ( fPoFedByPo )
    {
        extern Gia_Man_t * Gia_ManDupTrimmed3( Gia_Man_t * p );
        pTemp = Gia_ManDupTrimmed3( pTemp2 = pTemp );
        Gia_ManStop( pTemp2 );
    }
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &trim [-V num] [-iocpdh]\n" );
    Abc_Print( -2, "\t         removes PIs without fanout and PO driven by constants\n" );
    Abc_Print( -2, "\t-V num : the value (0 or 1) of POs to remove [default = both]\n" );
    Abc_Print( -2, "\t-i     : toggle removing PIs [default = %s]\n", fTrimCis? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle removing POs [default = %s]\n", fTrimCos? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle additionally removing POs fed by PIs [default = %s]\n", fPoFedByPi? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle additionally removing duplicated POs [default = %s]\n", fPoFedByPo? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle using dual-output miter [default = %s]\n", fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Dfs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c;
    int fNormal  = 0;
    int fRevFans = 0;
    int fRevOuts = 0;
    int fLeveled = 0;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "nfolvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'n':
            fNormal ^= 1;
            break;
        case 'f':
            fRevFans ^= 1;
            break;
        case 'o':
            fRevOuts ^= 1;
            break;
        case 'l':
            fLeveled ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Dfs(): There is no AIG.\n" );
        return 1;
    }
    if ( fLeveled )
        pTemp = Gia_ManDupLevelized( pAbc->pGia );
    else if ( fNormal )
        pTemp = Gia_ManDupOrderAiger( pAbc->pGia );
    else 
        pTemp = Gia_ManDupOrderDfsReverse( pAbc->pGia, fRevFans, fRevOuts );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &dfs [-nfolvh]\n" );
    Abc_Print( -2, "\t        orders objects in the DFS order\n" );
    Abc_Print( -2, "\t-n    : toggle using normalized ordering [default = %s]\n",            fNormal? "yes": "no" );
    Abc_Print( -2, "\t-f    : toggle using reverse fanin traversal order [default = %s]\n",  fRevFans? "yes": "no" );
    Abc_Print( -2, "\t-o    : toggle using reverse output traversal order [default = %s]\n", fRevOuts? "yes": "no" );
    Abc_Print( -2, "\t-l    : toggle using levelized order [default = %s]\n",                fLeveled? "yes": "no" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n",         fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_ParSim_t Pars, * pPars = &Pars;
    char * pFileName = NULL;
    int c;
    Gia_ManSimSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWNTImvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIters < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->RandSeed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->RandSeed < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            if ( pFileName == NULL )
                goto usage;
            break;
        case 'm':
            pPars->fCheckMiter ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Sim(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( pFileName != NULL )
    {
        extern void Gia_ManSimSimulatePattern( Gia_Man_t * p, char * pFileIn, char * pFileOut );
        char pFileNameOut[1000];
        char * pNameGeneric = Extra_FileNameGeneric(pFileName);
        assert( strlen(pNameGeneric) < 900 );
        sprintf( pFileNameOut, "%s_out.%s", pNameGeneric, Extra_FileNameExtension(pFileName) );
        ABC_FREE( pNameGeneric );
        Gia_ManSimSimulatePattern( pAbc->pGia, pFileName, pFileNameOut );
        return 1;
    }

    pAbc->nFrames = -1;
    if ( Gia_ManSimSimulate( pAbc->pGia, pPars ) )
        pAbc->Status =  0;
    else
        pAbc->Status = -1;
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
//    if ( pLogFileName )
//        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "&sim" );
    return 0;

usage:
    Abc_Print( -2, "usage: &sim [-FWNT num] [-mvh] -I <file>\n" );
    Abc_Print( -2, "\t         performs random simulation of the sequential miter\n" );
    Abc_Print( -2, "\t         (if candidate equivalences are defined, performs refinement)\n" );
    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n", pPars->nIters );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-N num : random number seed (1 <= num <= 1000) [default = %d]\n", pPars->RandSeed );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n", pPars->fCheckMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t-I file: (optional) file with input patterns (one line per frame, as many as PIs)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sim2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gia_ManSimTwo( Gia_Man_t * p0, Gia_Man_t * p1, int nWords, int nRounds, int TimeLimit, int fVerbose );
    Gia_Man_t * pGias[2]; FILE * pFile;
    char ** pArgvNew; int nArgcNew;
    int c, RetValue = 0, fVerbose = 0, nWords = 16, nRounds = 10, RandSeed = 1, TimeLimit = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WRNTvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRounds < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            RandSeed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( RandSeed < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeLimit < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew > 2 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cec(): Wrong number of command-line arguments.\n" );
        return 1;
    }
    if ( nArgcNew == 2 )
    {
        char * pFileNames[2] = { pArgvNew[0], pArgvNew[1] }, * pTemp;
        int n; 
        for ( n = 0; n < 2; n++ )
        {
            // fix the wrong symbol
            for ( pTemp = pFileNames[n]; *pTemp; pTemp++ )
                if ( *pTemp == '>' )
                    *pTemp = '\\';
            if ( (pFile = fopen( pFileNames[n], "r" )) == NULL )
            {
                Abc_Print( -1, "Cannot open input file \"%s\". ", pFileNames[n] );
                if ( (pFileNames[n] = Extra_FileGetSimilarName( pFileNames[n], ".aig", NULL, NULL, NULL, NULL )) )
                    Abc_Print( 1, "Did you mean \"%s\"?", pFileNames[n] );
                Abc_Print( 1, "\n" );
                return 1;
            }
            fclose( pFile );
            pGias[n] = Gia_AigerRead( pFileNames[n], 0, 0, 0 );
            if ( pGias[n] == NULL )
            {
                Abc_Print( -1, "Reading AIGER from file \"%s\" has failed.\n", pFileNames[n] );
                return 0;
            }
        }
    }
    else
    {
        char * FileName, * pTemp;
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Cec(): There is no current AIG.\n" );
            return 1;
        }
        pGias[0] = pAbc->pGia;
        if ( nArgcNew == 1 )
            FileName = pArgvNew[0];
        else
        {
            assert( nArgcNew == 0 );
            if ( pAbc->pGia->pSpec == NULL )
            {
                Abc_Print( -1, "File name is not given on the command line.\n" );
                return 1;
            }
            FileName = pAbc->pGia->pSpec;
        }
        // fix the wrong symbol
        for ( pTemp = FileName; *pTemp; pTemp++ )
            if ( *pTemp == '>' )
                *pTemp = '\\';
        if ( (pFile = fopen( FileName, "r" )) == NULL )
        {
            Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
            if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
                Abc_Print( 1, "Did you mean \"%s\"?", FileName );
            Abc_Print( 1, "\n" );
            return 1;
        }
        fclose( pFile );
        pGias[1] = Gia_AigerRead( FileName, 0, 0, 0 );
        if ( pGias[1] == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 0;
        }
    }
    if ( Gia_ManCiNum(pGias[0]) != Gia_ManCiNum(pGias[1]) )
    {
        Abc_Print( -1, "The number of CIs does not match.\n" );
        return 1;
    }
    if ( Gia_ManCoNum(pGias[0]) != Gia_ManCoNum(pGias[1]) )
    {
        Abc_Print( -1, "The number of COs does not match.\n" );
        return 1;
    }
    RetValue = Gia_ManSimTwo( pGias[0], pGias[1], nWords, nRounds, TimeLimit, fVerbose );
    if ( pGias[0] != pAbc->pGia )
        Gia_ManStopP( &pGias[0] );
    Gia_ManStopP( &pGias[1] );
    return 0;

usage:
    Abc_Print( -2, "usage: &sim2 [-WRNT num] [-vh] <file1.aig> <file2.aig>\n" );
    Abc_Print( -2, "\t         performs random of two circuits\n" );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n", nWords );
    Abc_Print( -2, "\t-R num : the number of simulation rounds [default = %d]\n", nRounds );
    Abc_Print( -2, "\t-N num : random number seed (1 <= num <= 1000) [default = %d]\n", RandSeed );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", TimeLimit );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sim3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Ssw_RarSimulateGia( Gia_Man_t * p, Ssw_RarPars_t * pPars );
    Ssw_RarPars_t Pars, * pPars = &Pars;
    int c;
    Ssw_RarSetDefaultParams( pPars );
    // parse command line
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWBRSNTGgvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBinSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBinSize < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRestart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRestart < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRandSeed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRandSeed < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOut < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOutGap = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOutGap < 0 )
                goto usage;
            break;
        case 'g':
            pPars->fUseFfGrouping ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Sim3(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Sim3(): This command works only for sequential AIGs.\n" );
        return 0;
    }
    pAbc->Status = Ssw_RarSimulateGia( pAbc->pGia, pPars );
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &sim3 [-FWBRNT num] [-gvh]\n" );
    Abc_Print( -2, "\t         performs random simulation of the sequential miter\n" );
    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n",       pPars->nFrames );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n",        pPars->nWords );
    Abc_Print( -2, "\t-B num : the number of flops in one bin [default = %d]\n",         pPars->nBinSize );
    Abc_Print( -2, "\t-R num : the number of simulation rounds [default = %d]\n",        pPars->nRounds );
    Abc_Print( -2, "\t-S num : the number of rounds before a restart [default = %d]\n",  pPars->nRestart );
    Abc_Print( -2, "\t-N num : random number seed (1 <= num <= 1000) [default = %d]\n",  pPars->nRandSeed );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n",   pPars->TimeOut );
    Abc_Print( -2, "\t-g     : toggle heuristic flop grouping [default = %s]\n",    pPars->fUseFfGrouping? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",    pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MLGen( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManDumpFiles( Gia_Man_t * p, int nCexesT, int nCexesV, int Seed, char * pFileName );
    extern void Gia_ManDumpPlaFiles( Gia_Man_t * p, int nCexesT, int nCexesV, int Seed, char * pFileName );
    int c, Seed = 0, nWords = 10, fBinData = 0, fVerbose = 0;
    char * pFileName = NULL;
    char ** pArgvNew;
    int nArgcNew;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WSbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            Seed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Seed < 0 )
                goto usage;
            break;
        case 'b':
            fBinData ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9MLGen(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9MLGen(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    Vec_WrdFreeP( &pAbc->pGia->vSimsPi );
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew == 0 )
        printf( "Default file names will be used.\n" );
    else
        pFileName = pArgvNew[0];
    if ( nArgcNew != 0 && nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    if ( fBinData )
        Gia_ManDumpFiles( pAbc->pGia, nWords, nWords, Seed, pFileName );
    else
        Gia_ManDumpPlaFiles( pAbc->pGia, nWords, nWords, Seed, pFileName );
    return 0;

usage:
    Abc_Print( -2, "usage: &mlgen [-WS num] [-bvh] <file>\n" );
    Abc_Print( -2, "\t         generates data files for machine learning\n" );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n", nWords );
    Abc_Print( -2, "\t-S num : the random seed for simulation data (num < 10000) [default = %d]\n", Seed );
    Abc_Print( -2, "\t-b     : toggle using binary data files [default = %s]\n", fBinData? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file to store the simulation info\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MLTest( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManTestOneFile( Gia_Man_t * p, char * pFileName, char * pDumpFile );
    int c, fVerbose = 0;
    char * pDumpFile = NULL;
    char ** pArgvNew;
    int nArgcNew;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Dvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a file name.\n" );
                goto usage;
            }
            pDumpFile = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9MLTest(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9MLTest(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    Vec_WrdFreeP( &pAbc->pGia->vSimsPi );
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9MLTest(): Expecting data file name on the command line.\n" );
        return 0;
    }
    Gia_ManTestOneFile( pAbc->pGia, pArgvNew[0], pDumpFile );
    return 0;

usage:
    Abc_Print( -2, "usage: &mltest [-vh] [-D file] <file>\n" );
    Abc_Print( -2, "\t          testing command for machine learning data\n" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    Abc_Print( -2, "\t-D file : file name to dump statistics [default = none]\n" );
    Abc_Print( -2, "\tfile    : file with input simulation info\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Iwls21Test( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManTestWordFile( Gia_Man_t * p, char * pFileName, char * pDumpFile, int fVerbose );
    int c, fVerbose = 0;
    char * pDumpFile = NULL;
    char ** pArgvNew;
    int nArgcNew;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Dvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a file name.\n" );
                goto usage;
            }
            pDumpFile = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew == 2 )
    {
        Gia_Man_t * pAig = Gia_AigerRead( pArgvNew[0], 0, 0, 0 );
        if ( pAig == NULL )
        {
            Abc_Print( -1, "Reading AIGER from file \"%s\" has failed.\n", pArgvNew[0] );
            return 0;
        }
        if ( Gia_ManRegNum(pAig) > 0 )
        {
            Abc_Print( -1, "Abc_CommandAbc9Iwls21Test(): This command works only for combinational AIGs.\n" );
            return 0;
        }
        if ( Gia_ManCoNum(pAig) != 10 )
        {
            Abc_Print( -1, "Abc_CommandAbc9Iwls21Test(): Expecting an AIG with 10 outputs.\n" );
            return 0;
        }
        Gia_ManTestWordFile( pAig, pArgvNew[1], pDumpFile, fVerbose );
        Gia_ManStop( pAig );
        return 0;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iwls21Test(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManCoNum(pAbc->pGia) != 10 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iwls21Test(): Expecting an AIG with 10 outputs.\n" );
        return 0;
    }
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iwls21Test(): Expecting data file name on the command line.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iwls21Test(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    Vec_WrdFreeP( &pAbc->pGia->vSimsPi );
    Gia_ManTestWordFile( pAbc->pGia, pArgvNew[0], pDumpFile, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &iwls21test [-vh] [-D file] <file1> <file2>\n" );
    Abc_Print( -2, "\t          this command evaluates AIG for 2021 IWLS ML+LS Contest\n" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    Abc_Print( -2, "\t-D file : file name to dump statistics [default = none]\n" );
    Abc_Print( -2, "\tfile1   : file with input AIG (or \"&read <file1.aig>; &iwls21test <file2>\" can be used)\n");
    Abc_Print( -2, "\tfile2   : file with CIFAR10 image data (https://www.cs.toronto.edu/~kriz/cifar.html)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReadSim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fOutputs = 0, nWords = 4, fTruth = 0, fVerbose = 0;
    char ** pArgvNew;
    int nArgcNew;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Wtovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 't':
            fTruth ^= 1;
            break;
        case 'o':
            fOutputs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReadSim(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReadSim(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    if ( fTruth )
    {
        if ( Gia_ManCiNum(pAbc->pGia) > 20 )
        {
            Abc_Print( -1, "Abc_CommandAbc9ReadSim(): More than 20 inputs.\n" );
            return 1;
        }
        Vec_WrdFreeP( &pAbc->pGia->vSimsPi );
        pAbc->pGia->vSimsPi = Vec_WrdStartTruthTables( Gia_ManCiNum(pAbc->pGia) );
        Vec_WrdFreeP( &pAbc->pGia->vSimsPo );
        pAbc->pGia->vSimsPo = Gia_ManSimPatSimOut( pAbc->pGia, pAbc->pGia->vSimsPi, 1 );
        return 0;
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    if ( fOutputs )
    {
        Vec_WrdFreeP( &pAbc->pGia->vSimsPo );
        pAbc->pGia->vSimsPo = Vec_WrdReadHex( pArgvNew[0], NULL, 1 );
        if ( Vec_WrdSize(pAbc->pGia->vSimsPo) % Gia_ManCoNum(pAbc->pGia) != 0 )
        {
            Vec_WrdFreeP( &pAbc->pGia->vSimsPo );
            Abc_Print( -1, "File size (%d words) does not match the number of AIG inputs (%d %% %d != %d).\n", 
                Vec_WrdSize(pAbc->pGia->vSimsPo), Vec_WrdSize(pAbc->pGia->vSimsPo), Gia_ManCiNum(pAbc->pGia), 
                Vec_WrdSize(pAbc->pGia->vSimsPo) % Gia_ManCiNum(pAbc->pGia) );
            return 1;
        }
        pAbc->pGia->nSimWords = Vec_WrdSize(pAbc->pGia->vSimsPo) / Gia_ManCoNum(pAbc->pGia);
    }
    else
    {
        Vec_WrdFreeP( &pAbc->pGia->vSimsPi );
        pAbc->pGia->vSimsPi = Vec_WrdReadHex( pArgvNew[0], NULL, 1 );
        if ( Vec_WrdSize(pAbc->pGia->vSimsPi) % Gia_ManCiNum(pAbc->pGia) != 0 )
        {
            Vec_WrdFreeP( &pAbc->pGia->vSimsPi );
            Abc_Print( -1, "File size (%d words) does not match the number of AIG inputs (%d %% %d != %d).\n", 
                Vec_WrdSize(pAbc->pGia->vSimsPi), Vec_WrdSize(pAbc->pGia->vSimsPi), Gia_ManCiNum(pAbc->pGia), 
                Vec_WrdSize(pAbc->pGia->vSimsPi) % Gia_ManCiNum(pAbc->pGia) );
            return 1;
        }
        pAbc->pGia->nSimWords = Vec_WrdSize(pAbc->pGia->vSimsPi) / Gia_ManCiNum(pAbc->pGia);
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &sim_read [-W num] [-tovh] <file>\n" );
    Abc_Print( -2, "\t         reads simulation patterns from file\n" );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n", nWords );
    Abc_Print( -2, "\t-t     : toggle creating exhaustive simulation info [default = %s]\n", fTruth? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle reading output information [default = %s]\n", fOutputs? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file to store the simulation info\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9WriteSim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fOutputs = 0, fTrans = 0, fBool = 0, fVerbose = 0;
    char ** pArgvNew;
    int nArgcNew;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "otbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'o':
            fOutputs ^= 1;
            break;
        case 't':
            fTrans ^= 1;
            break;
        case 'b':
            fBool ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9WriteSim(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9WriteSim(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    if ( (fOutputs ? pAbc->pGia->vSimsPo : pAbc->pGia->vSimsPi) == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9WriteSim(): Does not have simulation information available.\n" );
        return 0;
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    if ( fOutputs )
    {
        Vec_Wrd_t * vTemp;
        int nWords = Vec_WrdSize(pAbc->pGia->vSimsPo) / Gia_ManCoNum(pAbc->pGia);
        assert( Vec_WrdSize(pAbc->pGia->vSimsPo) % Gia_ManCoNum(pAbc->pGia) == 0 );
        if ( fTrans )
        {
            int nSize = Vec_WrdSize(pAbc->pGia->vSimsPo);
            Vec_WrdFillExtra( pAbc->pGia->vSimsPo, nWords * 64 * ((Gia_ManCoNum(pAbc->pGia) + 63)/64), 0 );
            vTemp = Vec_WrdStart( Vec_WrdSize(pAbc->pGia->vSimsPo) );
            Extra_BitMatrixTransposeP( pAbc->pGia->vSimsPo, nWords, vTemp, (Gia_ManCoNum(pAbc->pGia) + 63)/64 );
            if ( fBool )
                Vec_WrdDumpBool( pArgvNew[0], vTemp, (Gia_ManCoNum(pAbc->pGia) + 63)/64, Gia_ManCoNum(pAbc->pGia), 1, 1 );
            else
                Vec_WrdDumpHex( pArgvNew[0], vTemp, (Gia_ManCoNum(pAbc->pGia) + 63)/64, 1 );
            Vec_WrdShrink( pAbc->pGia->vSimsPo, nSize );
            Vec_WrdFree( vTemp );
        }
        else
        {
            if ( fBool )
                Vec_WrdDumpBool( pArgvNew[0], pAbc->pGia->vSimsPo, nWords, Gia_ManCoNum(pAbc->pGia), 1, 1 );
            else
                Vec_WrdDumpHex( pArgvNew[0], pAbc->pGia->vSimsPo, nWords, 1 );
        }
    }
    else
    {
        Vec_Wrd_t * vTemp;
        int nWords = Vec_WrdSize(pAbc->pGia->vSimsPi) / Gia_ManCiNum(pAbc->pGia);
        assert( Vec_WrdSize(pAbc->pGia->vSimsPi) % Gia_ManCiNum(pAbc->pGia) == 0 );
        if ( fTrans )
        {
            int nSize = Vec_WrdSize(pAbc->pGia->vSimsPi);
            Vec_WrdFillExtra( pAbc->pGia->vSimsPi, nWords * 64 * ((Gia_ManCiNum(pAbc->pGia) + 63)/64), 0 );
            vTemp = Vec_WrdStart( Vec_WrdSize(pAbc->pGia->vSimsPi) );
            Extra_BitMatrixTransposeP( pAbc->pGia->vSimsPi, nWords, vTemp, (Gia_ManCiNum(pAbc->pGia) + 63)/64 );
            if ( fBool )
                Vec_WrdDumpBool( pArgvNew[0], vTemp, (Gia_ManCiNum(pAbc->pGia) + 63)/64, Gia_ManCiNum(pAbc->pGia), 1, 1 );
            else
                Vec_WrdDumpHex( pArgvNew[0], vTemp, (Gia_ManCiNum(pAbc->pGia) + 63)/64, 1 );
            Vec_WrdShrink( pAbc->pGia->vSimsPi, nSize );
            Vec_WrdFree( vTemp );
        }
        else
        {
            if ( fBool )
                Vec_WrdDumpBool( pArgvNew[0], pAbc->pGia->vSimsPi, nWords, Gia_ManCiNum(pAbc->pGia), 1, 1 );
            else
                Vec_WrdDumpHex( pArgvNew[0], pAbc->pGia->vSimsPi, nWords, 1 );
        }
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &sim_write [-otbvh] <file>\n" );
    Abc_Print( -2, "\t         writes simulation patterns into a file\n" );
    Abc_Print( -2, "\t-o     : toggle writing output information [default = %s]\n", fOutputs? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle transposing the simulation information [default = %s]\n", fTrans? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle dumping in boolean vs hexadecimal notation [default = %s]\n", fBool? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file to store the simulation info\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9PrintSim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManSimProfile( Gia_Man_t * pGia );
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9PrintSim(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9PrintSim(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    if ( pAbc->pGia->vSimsPi == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9PrintSim(): Simulation patterns are not defined.\n" );
        return 0;
    }
    Gia_ManSimProfile( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &sim_print [-vh]\n" );
    Abc_Print( -2, "\t         writes simulation patterns into a file\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9GenSim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManSimProfile( Gia_Man_t * pGia );
    extern void Gia_ManPatSatImprove( Gia_Man_t * pGia, int nWords, int fVerbose );
    extern void Gia_ManPatDistImprove( Gia_Man_t * p, int fVerbose );
    extern void Gia_ManPatRareImprove( Gia_Man_t * p, int RareLimit, int fVerbose );
    int c, nWords = 4, nRare = -1, fDist = 0, fSatBased = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WRsdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRare = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRare < 0 )
                goto usage;
            break;
        case 's':
            fSatBased ^= 1;
            break;
        case 'd':
            fDist ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GenSim(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9GenSim(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    if ( fSatBased )
    {
        if ( pAbc->pGia->vSimsPi == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9GenSim(): Does not have simulation information available.\n" );
            return 0;
        }
        Gia_ManPatSatImprove( pAbc->pGia, nWords, fVerbose );
    }
    else if ( fDist )
    {
        if ( pAbc->pGia->vSimsPi == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9GenSim(): Does not have simulation information available.\n" );
            return 0;
        }
        Gia_ManPatDistImprove( pAbc->pGia, fVerbose );
    }
    else if ( nRare >= 0 )
    {
        if ( pAbc->pGia->vSimsPi == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9GenSim(): Does not have simulation information available.\n" );
            return 0;
        }
        Gia_ManPatRareImprove( pAbc->pGia, nRare, fVerbose );
    }
    else
    {
        Abc_Random(1);
        Vec_WrdFreeP( &pAbc->pGia->vSimsPi );
        pAbc->pGia->vSimsPi = Vec_WrdStartRandom( Gia_ManCiNum(pAbc->pGia) * nWords );
        printf( "Generated %d random patterns (%d 64-bit data words) for each input of the AIG.\n", 64*nWords, nWords );
    }
    Gia_ManSimProfile( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &sim_gen [-WR num] [-sdvh]\n" );
    Abc_Print( -2, "\t         generates random simulation patterns\n" );
    Abc_Print( -2, "\t-W num : the number of 64-bit words of simulation info [default = %d]\n",            nWords );
    Abc_Print( -2, "\t-R num : the rarity parameter used to define scope [default = %d]\n",                nRare );
    Abc_Print( -2, "\t-s     : toggle using SAT-based improvement of available patterns [default = %s]\n", fSatBased? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle using one improvement of available patterns [default = %s]\n",       fDist? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",                      fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SimRsb( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManSimRsb( Gia_Man_t * p, int nCands, int fVerbose );
    int c, nCands = 32, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nCands = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCands < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SimRsb(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9SimRsb(): This command works only for combinational AIGs.\n" );
        return 0;
    }
    if ( pAbc->pGia->vSimsPi == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SimRsb(): Does not have simulation information available.\n" );
        return 0;
    }
    Gia_ManSimRsb( pAbc->pGia, nCands, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &simrsb [-N num] [-vh]\n" );
    Abc_Print( -2, "\t         performs resubstitution\n" );
    Abc_Print( -2, "\t-C num : the number of candidates to try [default = %d]\n", nCands );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Resim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cec_ParSim_t Pars, * pPars = &Pars;
    int c, RetValue;
    Cec_ManSimSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'm':
            pPars->fCheckMiter ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Resim(): There is no AIG.\n" );
        return 1;
    }
    RetValue = Cec_ManSeqResimulateCounter( pAbc->pGia, pPars, pAbc->pCex );
    pAbc->Status  = RetValue ? 0 : -1;
    pAbc->nFrames = pAbc->pCex->iFrame;
//    Abc_FrameReplaceCex( pAbc, &pAbc->pCex );
    return 0;

usage:
    Abc_Print( -2, "usage: &resim [-F num] [-mvh]\n" );
    Abc_Print( -2, "\t         resimulates equivalence classes using counter-example\n" );
    Abc_Print( -2, "\t-F num : the number of additinal frames to simulate [default = %d]\n", pPars->nFrames );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n", pPars->fCheckMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SpecI( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gia_CommandSpecI( Gia_Man_t * pGia, int nFrames, int nBTLimit, int fUseStart, int fCheckMiter, int fVerbose );
    int nFrames     =   100;
    int nBTLimit    = 25000;
    int fUseStart   =     1;
    int fCheckMiter =     1;
    int fVerbose    =     0;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCfmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimit < 0 )
                goto usage;
            break;
        case 'f':
            fUseStart ^= 1;
            break;
        case 'm':
            fCheckMiter ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SpecI(): There is no AIG.\n" );
        return 1;
    }
    Gia_CommandSpecI( pAbc->pGia, nFrames, nBTLimit, fUseStart, fCheckMiter, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &speci [-FC num] [-fmvh]\n" );
    Abc_Print( -2, "\t         refines equivalence classes using speculative reduction\n" );
    Abc_Print( -2, "\t-F num : the max number of time frames [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-f     : toggle starting BMC from a later frame [default = %s]\n", fUseStart? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n", fCheckMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}



/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Equiv( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cec_ParSim_t Pars, * pPars = &Pars;
    int c;
    Cec_ManSimSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WFRSTsmdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNonRefines = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNonRefines < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 's':
            pPars->fSeqSimulate ^= 1;
            break;
        case 'm':
            pPars->fCheckMiter ^= 1;
            break;
        case 'd':
            pPars->fDualOut ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Equiv(): There is no AIG.\n" );
        return 1;
    }
    Cec_ManSimulation( pAbc->pGia, pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: &equiv [-WFRST num] [-smdvh]\n" );
    Abc_Print( -2, "\t         computes candidate equivalence classes\n" );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n", pPars->nFrames );
    Abc_Print( -2, "\t-R num : the max number of simulation rounds [default = %d]\n", pPars->nRounds );
    Abc_Print( -2, "\t-S num : the max number of rounds w/o refinement to stop [default = %d]\n", pPars->nNonRefines );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-s     : toggle seq vs. comb simulation [default = %s]\n", pPars->fSeqSimulate? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n", pPars->fCheckMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-d     : toggle using two POs intead of XOR [default = %s]\n", pPars->fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Equiv2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Ssw_SignalFilterGia( Gia_Man_t * p, int nFramesMax, int nConfMax, int nRounds, int TimeLimit, int TimeLimit2, Abc_Cex_t * pCex, int fLatchOnly, int fVerbose );
    int nFramesMax =   20;
    int nConfMax   =  500;
    int nRounds    =   10;
    int TimeLimit  =    0;
    int TimeLimit2 =    0;
    int fUseCex    =    0;
    int fLatchOnly =    0;
    int fVerbose   =    0;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCRTSxlvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFramesMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRounds < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeLimit < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeLimit2 = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeLimit2 < 0 )
                goto usage;
            break;
        case 'x':
            fUseCex ^= 1;
            break;
        case 'l':
            fLatchOnly ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Equiv2(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( 0, "Abc_CommandAbc9Equiv2(): There is no flops. Nothing is done.\n" );
        return 0;
    }
    if ( fUseCex )
    {
        if ( pAbc->pCex == NULL )
        {
            Abc_Print( 0, "Abc_CommandAbc9Equiv2(): Counter-example is not available.\n" );
            return 0;
        }
        if ( pAbc->pCex->nPis != Gia_ManPiNum(pAbc->pGia) )
        {
            Abc_Print( -1, "Abc_CommandAbc9Equiv2(): The number of PIs differs in cex (%d) and in AIG (%d).\n",
                pAbc->pCex->nPis, Gia_ManPiNum(pAbc->pGia) );
            return 1;
        }
    }
    Ssw_SignalFilterGia( pAbc->pGia, nFramesMax, nConfMax, nRounds, TimeLimit, TimeLimit2, fUseCex? pAbc->pCex: NULL, fLatchOnly, fVerbose );
    pAbc->Status  = -1;
//    pAbc->nFrames = pAbc->pCex->iFrame;
//    Abc_FrameReplaceCex( pAbc, &pAbc->pCex );
    return 0;

usage:
    Abc_Print( -2, "usage: &equiv2 [-FCRTS num] [-xlvh]\n" );
    Abc_Print( -2, "\t         computes candidate equivalence classes\n" );
    Abc_Print( -2, "\t-F num : the max number of frames for BMC [default = %d]\n", nFramesMax );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-R num : the max number of BMC rounds [default = %d]\n", nRounds );
    Abc_Print( -2, "\t-T num : runtime limit in seconds for all rounds [default = %d]\n", TimeLimit );
    Abc_Print( -2, "\t-S num : runtime limit in seconds for one round [default = %d]\n", TimeLimit2 );
    Abc_Print( -2, "\t-x     : toggle using the current cex to perform refinement [default = %s]\n", fUseCex? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle considering only latch output equivalences [default = %s]\n", fLatchOnly? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Equiv3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Ssw_RarSignalFilterGia( Gia_Man_t * p, Ssw_RarPars_t * pPars );
    Ssw_RarPars_t Pars, * pPars = &Pars;
    int c;
    Ssw_RarSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWBRSNTmxlvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBinSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBinSize < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRestart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRestart < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRandSeed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRandSeed < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOut < 0 )
                goto usage;
            break;
        case 'm':
            pPars->fMiter ^= 1;
            break;
        case 'x':
            pPars->fUseCex ^= 1;
            break;
        case 'l':
            pPars->fLatchOnly ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Equiv3(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( 0, "Abc_CommandAbc9Equiv3(): There is no flops. Nothing is done.\n" );
        return 0;
    }
    if ( pPars->fUseCex )
    {
        if ( pPars->fMiter )
        {
            Abc_Print( 0, "Abc_CommandAbc9Equiv3(): Considering the miter as a circuit because the CEX is given.\n" );
            pPars->fMiter = 0;
        }
        if ( pAbc->pCex == NULL )
        {
            Abc_Print( 0, "Abc_CommandAbc9Equiv3(): Counter-example is not available.\n" );
            return 0;
        }
        if ( pAbc->pCex->nPis != Gia_ManPiNum(pAbc->pGia) )
        {
            Abc_Print( -1, "Abc_CommandAbc9Equiv3(): The number of PIs differs in cex (%d) and in AIG (%d).\n",
                pAbc->pCex->nPis, Gia_ManPiNum(pAbc->pGia) );
            return 1;
        }
        pPars->pCex = pAbc->pCex;
    }
    pAbc->Status = Ssw_RarSignalFilterGia( pAbc->pGia, pPars );
//    pAbc->nFrames = pAbc->pGia->pCexSeq->iFrame;
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &equiv3 [-FWRSNT num] [-mxlvh]\n" );
    Abc_Print( -2, "\t         computes candidate equivalence classes\n" );
    Abc_Print( -2, "\t-F num : the max number of frames for BMC [default = %d]\n",                   pPars->nFrames );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n",                    pPars->nWords );
    Abc_Print( -2, "\t-R num : the max number of simulation rounds [default = %d]\n",                pPars->nRounds );
    Abc_Print( -2, "\t-S num : the number of rounds before a restart [default = %d]\n",              pPars->nRestart );
    Abc_Print( -2, "\t-N num : random number seed (1 <= num <= 1000) [default = %d]\n",              pPars->nRandSeed );
    Abc_Print( -2, "\t-T num : runtime limit in seconds for all rounds [default = %d]\n",            pPars->TimeOut );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n",                       pPars->fMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-x     : toggle using the current CEX to perform refinement [default = %s]\n", pPars->fUseCex? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle considering only latch output equivalences [default = %s]\n",  pPars->fLatchOnly? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",                pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Semi( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cec_ParSmf_t Pars, * pPars = &Pars;
    int c;
    Cec_ManSmfSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WRFSMCTmdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNonRefines = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNonRefines < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nMinOutputs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nMinOutputs < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'm':
            pPars->fCheckMiter ^= 1;
            break;
        case 'd':
            pPars->fDualOut ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Resim(): There is no AIG.\n" );
        return 1;
    }
    Cec_ManSeqSemiformal( pAbc->pGia, pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: &semi [-WRFSMCT num] [-mdvh]\n" );
    Abc_Print( -2, "\t         performs semiformal refinement of equivalence classes\n" );
    Abc_Print( -2, "\t-W num : the number of words to simulate [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-R num : the max number of rounds to simulate [default = %d]\n", pPars->nRounds );
    Abc_Print( -2, "\t-F num : the max number of frames to unroll [default = %d]\n", pPars->nFrames );
    Abc_Print( -2, "\t-S num : the max number of rounds w/o refinement to stop [default = %d]\n", pPars->nNonRefines );
    Abc_Print( -2, "\t-M num : the min number of outputs of bounded SRM [default = %d]\n", pPars->nMinOutputs );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n", pPars->fCheckMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-d     : toggle using two POs intead of XOR [default = %s]\n", pPars->fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Times( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, nTimes = 2, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimes < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Times(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManDupTimes( pAbc->pGia, nTimes );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &times [-N <num>] [-vh]\n" );
    Abc_Print( -2, "\t         creates several \"parallel\" copies of the design\n" );
    Abc_Print( -2, "\t-N num : number of copies to create [default = %d]\n", nTimes );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Frames( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManFrames2( Gia_Man_t * pAig, Gia_ParFra_t * pPars );

    Gia_Man_t * pTemp;
    Gia_ParFra_t Pars, * pPars = &Pars;
    int c;
    int nCofFanLit = 0;
    int fNewAlgo = 0;
    int fInitSpecial = 0;
    Gia_ManFraSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FLsoibavh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nCofFanLit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCofFanLit < 0 )
                goto usage;
            break;
        case 's':
            pPars->fDisableSt ^= 1;
            break;
        case 'o':
            pPars->fOrPos ^= 1;
            break;
        case 'i':
            pPars->fInit ^= 1;
            break;
        case 'b':
            fInitSpecial ^= 1;
            break;
        case 'a':
            fNewAlgo ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Frames(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( fInitSpecial )
        pTemp = Gia_ManFramesInitSpecial( pAbc->pGia, pPars->nFrames, pPars->fVerbose );
    else if ( nCofFanLit )
        pTemp = Gia_ManUnrollAndCofactor( pAbc->pGia, pPars->nFrames, nCofFanLit, pPars->fVerbose );
    else if ( fNewAlgo )
        pTemp = Gia_ManFrames2( pAbc->pGia, pPars );
    else
        pTemp = Gia_ManFrames( pAbc->pGia, pPars );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &frames [-FL <num>] [-soibavh]\n" );
    Abc_Print( -2, "\t         unrolls the design for several timeframes\n" );
    Abc_Print( -2, "\t-F num : the number of frames to unroll [default = %d]\n", pPars->nFrames );
    Abc_Print( -2, "\t-L num : the limit on fanout count of resets/enables to cofactor [default = %d]\n", nCofFanLit );
    Abc_Print( -2, "\t-s     : toggle disabling structural hashing [default = %s]\n", pPars->fDisableSt? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle ORing corresponding POs [default = %s]\n", pPars->fOrPos? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggle initializing registers [default = %s]\n", pPars->fInit? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle computing special AIG for BMC [default = %s]\n", fInitSpecial? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle using new algorithm [default = %s]\n", fNewAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Retime( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c;
    int nMaxIters = 100;
    int fVerbose  =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nMaxIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxIters < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Retime(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    pTemp = Gia_ManRetimeForward( pAbc->pGia, nMaxIters, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &retime [-N <num>] [-vh]\n" );
    Abc_Print( -2, "\t         performs most-forward retiming\n" );
    Abc_Print( -2, "\t-N num : the number of incremental iterations [default = %d]\n", nMaxIters );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Enable( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c;
    int fRemove  = 0;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "rvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'r':
            fRemove ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Enable(): There is no AIG.\n" );
        return 1;
    }
    if ( fRemove )
        pTemp = Gia_ManRemoveEnables( pAbc->pGia );
    else
        pTemp = Gia_ManDupSelf( pAbc->pGia );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &enable [-rvh]\n" );
    Abc_Print( -2, "\t         adds or removes flop enable signals\n" );
    Abc_Print( -2, "\t-r     : toggle adding vs. removing enables [default = %s]\n", fRemove? "remove": "add" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Dc2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    int fUpdateLevel = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Dc2(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManCompress2( pAbc->pGia, fUpdateLevel, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &dc2 [-lvh]\n" );
    Abc_Print( -2, "\t         performs heavy rewriting of the AIG\n" );
    Abc_Print( -2, "\t-l     : toggle level update during rewriting [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Dsd( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManCollapseTest( Gia_Man_t * p, int fVerbose );
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    int fUpdateLevel = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Dsd(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManCollapseTest( pAbc->pGia, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &dsd [-vh]\n" );
    Abc_Print( -2, "\t         performs DSD-based collapsing\n" );
//    Abc_Print( -2, "\t-l     : toggle level update during rewriting [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Bidec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    int fUpdateLevel = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUpdateLevel ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bidec(): There is no AIG.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bidec(): Mapping of the AIG is not defined.\n" );
        return 1;
    }
    pTemp = Gia_ManPerformBidec( pAbc->pGia, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &bidec [-vh]\n" );
    Abc_Print( -2, "\t         performs heavy rewriting of the AIG\n" );
//    Abc_Print( -2, "\t-l     : toggle level update during rewriting [default = %s]\n", fUpdateLevel? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Shrink( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp = NULL;
    int nLutSize;
    int c,fVerbose = 0;
    int fKeepLevel = 0;
    int nFanoutMax = 50;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nlvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a char string.\n" );
                goto usage;
            }
            nFanoutMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFanoutMax < 0 )
                goto usage;
            break;
        case 'l':
            fKeepLevel ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Shrink(): There is no AIG.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Shrink(): Mapping of the AIG is not defined.\n" );
        return 1;
    }
    nLutSize = Gia_ManLutSizeMax( pAbc->pGia );
    if ( nLutSize <= 4 )
        pTemp = Gia_ManMapShrink4( pAbc->pGia, fKeepLevel, fVerbose );
    else if ( nLutSize <= 6 )
        pTemp = Gia_ManMapShrink6( pAbc->pGia, nFanoutMax, fKeepLevel, fVerbose );
    else
        Abc_Print( -1, "Abc_CommandAbc9Shrink(): Works only for 4-LUTs and 6-LUTs.\n" );
    if ( pTemp )
        Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &shrink [-N num] [-lvh]\n" );
    Abc_Print( -2, "\t         performs fast shrinking using current mapping\n" );
    Abc_Print( -2, "\t-N num : the max fanout count to skip a divisor [default = %d]\n", nFanoutMax );
    Abc_Print( -2, "\t-l     : toggle level update during shrinking [default = %s]\n", fKeepLevel? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Fx( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int nNewNodesMax = 1000000;
    int LitCountMax  =       0;
    int fReverse     =       0;
    int c, fVerbose  =       0;
    int fVeryVerbose =       0;
    // set the defaults
    Extra_UtilGetoptReset();
    while ( (c = Extra_UtilGetopt(argc, argv, "NMrvwh")) != EOF )
    {
        switch (c)
        {
            case 'N':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                    goto usage;
                }
                nNewNodesMax = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( nNewNodesMax < 0 )
                    goto usage;
                break;
            case 'M':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                    goto usage;
                }
                LitCountMax = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( LitCountMax < 0 )
                    goto usage;
                break;
            case 'r':
                fReverse ^= 1;
                break;
            case 'v':
                fVerbose ^= 1;
                break;
            case 'w':
                fVeryVerbose ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Shrink(): There is no AIG.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Shrink(): Mapping of the AIG is not defined.\n" );
        return 1;
    }
    pTemp = Gia_ManPerformFx( pAbc->pGia, nNewNodesMax, LitCountMax, fReverse, fVerbose, fVeryVerbose );
    if ( pTemp != NULL )
        Abc_FrameUpdateGia( pAbc, pTemp );
    else
        Abc_Print( -1, "Abc_CommandAbc9Fx(): Command has failed.\n" );
    return 0;

usage:
    Abc_Print( -2, "usage: &fx [-NM <num>] [-vh]\n");
    Abc_Print( -2, "\t           extract shared logic using the classical \"fast_extract\" algorithm\n");
    Abc_Print( -2, "\t-N <num> : max number of divisors to extract during this run [default = %d]\n", nNewNodesMax );
    Abc_Print( -2, "\t-M <num> : upper bound on literal count of divisors to extract [default = %d]\n", LitCountMax );
    Abc_Print( -2, "\t-r       : reversing variable order during ISOP computation [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-v       : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Extract( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Abc_NtkShareXorGia( Gia_Man_t * p, int nMultiSize, int fAnd, int fVerbose );
    Gia_Man_t * pTemp;
    int nMultiSize = 3;
    int c, fAnds = 0;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( (c = Extra_UtilGetopt(argc, argv, "Kavh")) != EOF )
    {
        switch (c)
        {
            case 'K':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                    goto usage;
                }
                nMultiSize = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( nMultiSize < 0 )
                    goto usage;
                break;
            case 'a':
                fAnds ^= 1;
                break;
            case 'v':
                fVerbose ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Shrink(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Abc_NtkShareXorGia( pAbc->pGia, nMultiSize, fAnds, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &extract [-K <num>] [-vh]\n");
    Abc_Print( -2, "\t           extract shared logic for XOR-rich circuits\n");
    Abc_Print( -2, "\t-K <num> : the minimum gate size to consider for extraction [default = %d]\n", nMultiSize );
    Abc_Print( -2, "\t-a       : toogle extracting ANDs instead of XORs [default = %s]\n", fAnds? "yes": "no" );
    Abc_Print( -2, "\t-v       : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Balance( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp = NULL;
    int nNewNodesMax = ABC_INFINITY;
    int fDelayOnly   = 0;
    int fSimpleAnd   = 0;
    int fStrict      = 0;
    int fKeepLevel   = 0;
    int c, fVerbose  = 0;
    int fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ndaslvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a char string.\n" );
                goto usage;
            }
            nNewNodesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNewNodesMax < 0 )
                goto usage;
            break;
        case 'd':
            fDelayOnly ^= 1;
            break;
        case 'a':
            fSimpleAnd ^= 1;
            break;
        case 's':
            fStrict ^= 1;
            break;
        case 'l':
            fKeepLevel ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Balance(): There is no AIG.\n" );
        return 1;
    }
    if ( fDelayOnly )
        pTemp = Gia_ManBalance( pAbc->pGia, fSimpleAnd, fStrict, fVerbose );
    else
        pTemp = Gia_ManAreaBalance( pAbc->pGia, fSimpleAnd, nNewNodesMax, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &b [-N num] [-dasvwh]\n" );
    Abc_Print( -2, "\t         performs AIG balancing to reduce delay and area\n" );
    Abc_Print( -2, "\t-N num : the max fanout count to skip a divisor [default = %d]\n", nNewNodesMax );
    Abc_Print( -2, "\t-d     : toggle delay only balancing [default = %s]\n", fDelayOnly? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle using AND instead of AND/XOR/MUX [default = %s]\n", fSimpleAnd? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle strict control of area in delay-mode (\"&b -d\") [default = %s]\n", fStrict? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9BalanceLut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManBalanceLut( Gia_Man_t * p, int nLutSize, int nCutNum, int fVerbose );
    extern Gia_Man_t * Gia_ManLutBalance( Gia_Man_t * p, int nLutSize, int fUseMuxes, int fRecursive, int fOptArea, int fVerbose );
    Gia_Man_t * pTemp = NULL;
    int fUseOld      = 0;
    int nLutSize     = 6;
    int nCutNum      = 8;
    int fUseMuxes    = 1;
    int fRecursive   = 1;
    int fOptArea     = 1;
    int c, fVerbose  = 0;
    int fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCnmravwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a char string.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a char string.\n" );
                goto usage;
            }
            nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutNum < 0 )
                goto usage;
            break;
        case 'n':
            fUseOld ^= 1;
            break;
        case 'm':
            fUseMuxes ^= 1;
            break;
        case 'r':
            fRecursive ^= 1;
            break;
        case 'a':
            fOptArea ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9BalanceLut(): There is no AIG.\n" );
        return 1;
    }
    if ( fUseOld )
        pTemp = Gia_ManBalanceLut( pAbc->pGia, nLutSize, nCutNum, fVerbose );
    else
        pTemp = Gia_ManLutBalance( pAbc->pGia, nLutSize, fUseMuxes, fRecursive, fOptArea, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &blut [-KC num] [-mravh]\n" );
    Abc_Print( -2, "\t           performs AIG balancing for the given LUT size\n" );
    Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n", 6, nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n", 8, nCutNum );
    Abc_Print( -2, "\t-m       : toggle performing MUX restructuring [default = %s]\n", fUseMuxes? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggle performing recursive restructuring [default = %s]\n", fRecursive? "yes": "no" );
    Abc_Print( -2, "\t-a       : toggle performing area-oriented restructuring [default = %s]\n", fOptArea? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
//    Abc_Print( -2, "\t-w       : toggle printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Resub( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManResub1( char * pFileName, int nNodes, int nSupp, int nDivs, int iChoice, int fUseXor, int fVerbose, int fVeryVerbose );
    extern Gia_Man_t * Gia_ManResub2( Gia_Man_t * pGia, int nNodes, int nSupp, int nDivs, int iChoice, int fUseXor, int fVerbose, int fVeryVerbose );
    Gia_Man_t * pTemp;
    int nNodes       =  0;
    int nSupp        =  0;
    int nDivs        =  0;
    int c, fVerbose  =  0;
    int fVeryVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NSDvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-N\" should be followed by a floating point number.\n" );
                return 0;
            }
            nNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodes < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-S\" should be followed by a floating point number.\n" );
                return 0;
            }
            nSupp = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSupp < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                return 0;
            }
            nDivs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDivs < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
    {
        pTemp = Gia_ManResub1( argv[globalUtilOptind], nNodes, nSupp, nDivs, 0, 0, fVerbose, fVeryVerbose );
        Abc_FrameUpdateGia( pAbc, pTemp );
        return 0;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Resub(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManResub2( pAbc->pGia, nNodes, nSupp, nDivs, 0, 0, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &resub [-NSD num] [-vwh]\n" );
    Abc_Print( -2, "\t           performs AIG resubstitution\n" );
    Abc_Print( -2, "\t-N num   : the limit on added nodes (num >= 0) [default = %d]\n",     nNodes );
    Abc_Print( -2, "\t-S num   : the limit on support size (num > 0) [default = %d]\n",     nSupp );
    Abc_Print( -2, "\t-D num   : the limit on divisor count (num > 0) [default = %d]\n",    nDivs );
    Abc_Print( -2, "\t-v       : toggles printing verbose information [default = %s]\n",    fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Reshape( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManReshape1( Gia_Man_t * pGia, int fUseSimple, int fVerbose, int fVeryVerbose );
    extern Gia_Man_t * Gia_ManReshape2( Gia_Man_t * pGia, int fUseSimple, int fVerbose, int fVeryVerbose );
    Gia_Man_t * pTemp;
    int fUseReshape1 =  0;
    int fUseSimple   =  0;
    int c, fVerbose  =  0;
    int fVeryVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "asvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fUseReshape1 ^= 1;
            break;
        case 's':
            fUseSimple ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Resub(): There is no AIG.\n" );
        return 1;
    }
    if ( fUseReshape1 )
        pTemp = Gia_ManReshape1( pAbc->pGia, fUseSimple, fVerbose, fVeryVerbose );
    else
        pTemp = Gia_ManReshape2( pAbc->pGia, fUseSimple, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &reshape [-asvwh]\n" );
    Abc_Print( -2, "\t           performs AIG resubstitution\n" );
    Abc_Print( -2, "\t-a       : toggles selecting the algorithm [default = %s]\n",         fUseReshape1? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles using simple method [default = %s]\n",             fUseSimple? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles printing verbose information [default = %s]\n",    fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Syn2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fVerbose  =  0;
    int fOldAlgo     =  0;
    int fCoarsen     =  1;
    int fCutMin      =  0;
    int nRelaxRatio  = 20;
    int fDelayMin    =  0;
    int fVeryVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Rakmdvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRelaxRatio < 0 )
                goto usage;
            break;
        case 'a':
            fOldAlgo ^= 1;
            break;
        case 'k':
            fCoarsen ^= 1;
            break;
        case 'm':
            fCutMin ^= 1;
            break;
        case 'd':
            fDelayMin ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Syn2(): There is no AIG.\n" );
        return 1;
    }
    if ( fDelayMin )
    {
        If_DsdMan_t * p = (If_DsdMan_t *)Abc_FrameReadManDsd();
        if ( p && If_DsdManVarNum(p) < 6 )
        {
            printf( "DSD manager has incompatible number of variables. Delay minimization is not performed.\n" );
            fDelayMin = 0;
        }
    }
    pTemp = Gia_ManAigSyn2( pAbc->pGia, fOldAlgo, fCoarsen, fCutMin, nRelaxRatio, fDelayMin, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &syn2 [-R num] [-akmdvh]\n" );
    Abc_Print( -2, "\t           performs AIG optimization\n" );
    Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n",   nRelaxRatio );
    Abc_Print( -2, "\t-a       : toggles using the old algorithm [default = %s]\n",         fOldAlgo? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n",    fCoarsen? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles cut minimization [default = %s]\n",                fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggles additional delay optimization [default = %s]\n",   fDelayMin? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles printing verbose information [default = %s]\n",    fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Synch2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManAigSynch2( Gia_Man_t * p, void * pPars, int nLutSize, int nRelaxRatio );
    Gia_Man_t * pTemp;
    Dch_Pars_t Pars, * pPars = &Pars;
    int c, nLutSize = 6;
    int nRelaxRatio = 20;
    // set defaults
    Dch_ManSetDefaultParams( pPars );
    pPars->nBTLimit = 100;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WCSKRfrvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSatVarMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSatVarMax < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a char string.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRelaxRatio < 0 )
                goto usage;
            break;
        case 'f':
            pPars->fLightSynth ^= 1;
            break;
        case 'r':
            pPars->fSkipRedSupp ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Dch(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManAigSynch2( pAbc->pGia, pPars, nLutSize, nRelaxRatio );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &synch2 [-WCSKR num] [-frvh]\n" );
    Abc_Print( -2, "\t         computes structural choices using a new approach\n" );
    Abc_Print( -2, "\t-W num : the max number of simulation words [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-S num : the max number of SAT variables [default = %d]\n", pPars->nSatVarMax );
    Abc_Print( -2, "\t-K num : the target LUT size for downstream mapping [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-R num : the delay relaxation ratio (num >= 0) [default = %d]\n",   nRelaxRatio );
    Abc_Print( -2, "\t-f     : toggle using lighter logic synthesis [default = %s]\n", pPars->fLightSynth? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle skipping choices with redundant support [default = %s]\n", pPars->fSkipRedSupp? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Syn3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    int fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Syn3(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManAigSyn3( pAbc->pGia, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &syn3 [-lvh]\n" );
    Abc_Print( -2, "\t         performs AIG optimization\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Syn4( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    int fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Syn4(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManAigSyn4( pAbc->pGia, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &syn4 [-lvh]\n" );
    Abc_Print( -2, "\t         performs AIG optimization\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9False( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManCheckFalse( Gia_Man_t * p, int nSlackMax, int nTimeOut, int fVerbose, int fVeryVerbose );
    Gia_Man_t * pTemp;
    int nSlackMax = 0;
    int nTimeOut = 0;
    int c, fVerbose = 0;
    int fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "STvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a char string.\n" );
                goto usage;
            }
            nSlackMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSlackMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by a char string.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9False(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManCheckFalse( pAbc->pGia, nSlackMax, nTimeOut, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &false [-ST num] [-vwh]\n" );
    Abc_Print( -2, "\t         detecting and elimintation false paths\n" );
    Abc_Print( -2, "\t-S num : maximum slack to identify false paths [default = %d]\n",  nSlackMax );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n",   nTimeOut );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",    fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Miter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManPairWiseMiter( Gia_Man_t * p );
    extern Gia_Man_t * Gia_ManDupWithCare( Gia_Man_t * p, Gia_Man_t * pCare );
    FILE * pFile;
    Gia_Man_t * pAux;
    Gia_Man_t * pSecond;
    char * FileName, * pTemp;
    char ** pArgvNew;
    int nArgcNew;
    int c;
    int nInsDup  = 0;
    int fDualOut = 0;
    int fSeq     = 0;
    int fPairWise= 0;
    int fTrans   = 0;
    int fTransX  = 0;
    int fConvert = 0;
    int fTransZ  = 0;
    int fWithCare= 0;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Idsptxyzcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a char string.\n" );
                goto usage;
            }
            nInsDup = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nInsDup < 0 )
                goto usage;
            break;
        case 'd':
            fDualOut ^= 1;
            break;
        case 's':
            fSeq ^= 1;
            break;
        case 'p':
            fPairWise ^= 1;
            break;
        case 't':
            fTrans ^= 1;
            break;
        case 'x':
            fTransX ^= 1;
            break;
        case 'y':
            fConvert ^= 1;
            break;
        case 'z':
            fTransZ ^= 1;
            break;
        case 'c':
            fWithCare ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( fPairWise )
    {
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Miter(): There is no AIG.\n" );
            return 1;
        }
        pAux = Gia_ManPairWiseMiter( pAbc->pGia );
        Abc_FrameUpdateGia( pAbc, pAux );
        return 0;
    }
    if ( fTrans || fTransX || fTransZ || fConvert )
    {
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Miter(): There is no AIG.\n" );
            return 1;
        }
        if ( (Gia_ManPoNum(pAbc->pGia) & 1) == 1 )
        {
            Abc_Print( -1, "Abc_CommandAbc9Miter(): The number of outputs should be even.\n" );
            return 0;
        }
        if ( fTrans )
        {
            pAux = Gia_ManTransformMiter( pAbc->pGia );
            Abc_Print( 1, "The miter (current AIG) is transformed by XORing POs pair-wise.\n" );
        }
        else if ( fTransX )
        {
            pAux = Gia_ManTransformMiter2( pAbc->pGia );
            Abc_Print( 1, "The miter (current AIG) is transformed by XORing POs of two word-level outputs.\n" );
        }
        else if ( fTransZ ) 
        {
            extern Gia_Man_t * Gia_ManTransformDualOutput( Gia_Man_t * p );
            pAux = Gia_ManTransformDualOutput( pAbc->pGia );
            Abc_Print( 1, "The dual-output miter (current AIG) is transformed by ordering sides.\n" );
        }
        else
        {
            pAux = Gia_ManTransformTwoWord2DualOutput( pAbc->pGia );
            Abc_Print( 1, "The miter (current AIG) is transformed from two-word to dual-output.\n" );
        }
        Abc_FrameUpdateGia( pAbc, pAux );
        return 0;
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }

    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );
    pSecond = Gia_AigerRead( FileName, 0, 0, 0 );
    if ( pSecond == NULL )
    {
        Abc_Print( -1, "Reading AIGER has failed.\n" );
        return 0;
    }
    // compute the miter
    if ( fWithCare )
        pAux = Gia_ManDupWithCare( pAbc->pGia, pSecond );
    else
        pAux = Gia_ManMiter( pAbc->pGia, pSecond, nInsDup, fDualOut, fSeq, 0, fVerbose );
    Gia_ManStop( pSecond );
    Abc_FrameUpdateGia( pAbc, pAux );
    return 0;

usage:
    Abc_Print( -2, "usage: &miter [-I num] [-dsptxyzcvh] <file>\n" );
    Abc_Print( -2, "\t         creates miter of two designs (current AIG vs. <file>)\n" );
    Abc_Print( -2, "\t-I num : the number of last PIs to replicate [default = %d]\n", nInsDup );
    Abc_Print( -2, "\t-d     : toggle creating dual-output miter [default = %s]\n", fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle creating sequential miter [default = %s]\n", fSeq? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle creating pair-wise miter [default = %s]\n", fPairWise? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle XORing POs of dual-output miter [default = %s]\n", fTrans? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle XORing POs of two-word miter [default = %s]\n", fTransX? "yes": "no" );
    Abc_Print( -2, "\t-y     : toggle convering two-word miter into dual-output miter [default = %s]\n", fConvert? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle ordering sides of the dual-output miter [default = %s]\n", fTransZ? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle duplicating AIG with the care set [default = %s]\n", fWithCare? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : AIGER file with the design to miter\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Miter2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pFile;
    Gia_Man_t * pAux;
    char * FileName, * pTemp, * pInit;
    char ** pArgvNew;
    int nArgcNew;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }
    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );
    // extract string
    pInit = Extra_FileReadContents( FileName );
    Extra_StringClean( pInit, "01xX" );
    if ( (int)strlen(pInit) != Gia_ManCiNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Init string length (%d) differs from PI and flop count (%d).\n", strlen(pInit), Gia_ManCiNum(pAbc->pGia) );
        ABC_FREE( pInit );
        return 1;
    }
    // compute the miter
    pAux = Gia_ManMiter2( pAbc->pGia, pInit, fVerbose );
    ABC_FREE( pInit );
    Abc_FrameUpdateGia( pAbc, pAux );
    return 0;

usage:
    Abc_Print( -2, "usage: &miter2 [-vh] <file>\n" );
    Abc_Print( -2, "\t         creates miter of two copies of the design\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file name with flop initial values (0/1/x/X) [default = required]\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Append( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pFile;
    Gia_Man_t * pSecond;
    char * FileName, * pTemp;
    char ** pArgvNew;
    int nArgcNew;
    int c;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "File name is not given on the command line.\n" );
        return 1;
    }

    // get the input file name
    FileName = pArgvNew[0];
    // fix the wrong symbol
    for ( pTemp = FileName; *pTemp; pTemp++ )
        if ( *pTemp == '>' )
            *pTemp = '\\';
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
        if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
        Abc_Print( 1, "\n" );
        return 1;
    }
    fclose( pFile );
    pSecond = Gia_AigerRead( FileName, 0, 0, 0 );
    if ( pSecond == NULL )
    {
        Abc_Print( -1, "Reading AIGER has failed.\n" );
        return 0;
    }
    // compute the miter
    Gia_ManDupAppend( pAbc->pGia, pSecond );
    Gia_ManStop( pSecond );
    return 0;

usage:
    Abc_Print( -2, "usage: &append [-vh] <file>\n" );
    Abc_Print( -2, "\t         appends <file> to the current AIG using new PIs and POs\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : AIGER file with the design to miter\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Scl( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c;
    int fConst = 1;
    int fEquiv = 1;
    int fVerbose = 0;
    int fVerboseFlops = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "cevwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fConst ^= 1;
            break;
        case 'e':
            fEquiv ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVerboseFlops ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Scl(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManBoxNum(pAbc->pGia) && Gia_ManRegBoxNum(pAbc->pGia) )
    {
        if ( pAbc->pGia->pAigExtra == NULL )
        {
            printf( "Timing manager is given but there is no GIA of boxes.\n" );
            return 0;
        }
        pTemp = Gia_ManSweepWithBoxes( pAbc->pGia, NULL, NULL, fConst, fEquiv, fVerbose, fVerboseFlops );
        Abc_FrameUpdateGia( pAbc, pTemp );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    pTemp = Gia_ManSeqStructSweep( pAbc->pGia, fConst, fEquiv, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &scl [-cevwh]\n" );
    Abc_Print( -2, "\t         performs structural sequential cleanup\n" );
    Abc_Print( -2, "\t-c     : toggle removing stuck-at constant registers [default = %s]\n", fConst? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle removing equivalent-driver registers [default = %s]\n", fEquiv? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing verbose info about equivalent flops [default = %s]\n", fVerboseFlops? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Lcorr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cec_ParCor_t Pars, * pPars = &Pars;
    Gia_Man_t * pTemp;
    int c;
    Cec_ManCorSetDefaultParams( pPars );
    pPars->fLatchCorr = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCPXrcvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nPrefix = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nPrefix < 0 )
                goto usage;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLimitMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLimitMax < 0 )
                goto usage;
            break;
        case 'r':
            pPars->fUseRings ^= 1;
            break;
        case 'c':
            pPars->fUseCSat ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVerboseFlops ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Lcorr(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManBoxNum(pAbc->pGia) && Gia_ManRegBoxNum(pAbc->pGia) )
    {
        if ( pAbc->pGia->pAigExtra == NULL )
        {
            printf( "Timing manager is given but there is no GIA of boxes.\n" );
            return 0;
        }
        pTemp = Gia_ManSweepWithBoxes( pAbc->pGia, NULL, pPars, 0, 0, pPars->fVerbose, pPars->fVerboseFlops );
        Abc_FrameUpdateGia( pAbc, pTemp );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    pTemp = Cec_ManLSCorrespondence( pAbc->pGia, pPars );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &lcorr [-FCPX num] [-rcvwh]\n" );
    Abc_Print( -2, "\t         performs latch correpondence computation\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-F num : the number of timeframes in inductive case [default = %d]\n", pPars->nFrames );
    Abc_Print( -2, "\t-P num : the number of timeframes in the prefix [default = %d]\n", pPars->nPrefix );
    Abc_Print( -2, "\t-X num : the number of iterations of little or no improvement [default = %d]\n", pPars->nLimitMax );
    Abc_Print( -2, "\t-r     : toggle using implication rings during refinement [default = %s]\n", pPars->fUseRings? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle using circuit-based SAT solver [default = %s]\n", pPars->fUseCSat? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing verbose info about equivalent flops [default = %s]\n", pPars->fVerboseFlops? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Scorr( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Cec_ManScorrCorrespondence( Gia_Man_t * p, Cec_ParCor_t * pPars );
    extern Gia_Man_t * Gia_ManScorrDivideTest( Gia_Man_t * p, Cec_ParCor_t * pPars );
    Cec_ParCor_t Pars, * pPars = &Pars;
    Gia_Man_t * pTemp;
    int fPartition = 0;
    int fUseOld = 0, c;
    Cec_ManCorSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCPXpkrecqowvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFrames < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nPrefix = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nPrefix < 0 )
                goto usage;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLimitMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLimitMax < 0 )
                goto usage;
            break;
        case 'p':
            fPartition ^= 1;
            break;
        case 'k':
            pPars->fConstCorr ^= 1;
            break;
        case 'r':
            pPars->fUseRings ^= 1;
            break;
        case 'e':
            pPars->fMakeChoices ^= 1;
            break;
        case 'c':
            pPars->fUseCSat ^= 1;
            break;
        case 'q':
            pPars->fStopWhenGone ^= 1;
            break;
        case 'o':
            fUseOld ^= 1;
            break;
        case 'w':
            pPars->fVerboseFlops ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Scorr(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManBoxNum(pAbc->pGia) && Gia_ManRegBoxNum(pAbc->pGia) )
    {
        if ( pAbc->pGia->pAigExtra == NULL )
        {
            printf( "Timing manager is given but there is no GIA of boxes.\n" );
            return 0;
        }
        pTemp = Gia_ManSweepWithBoxes( pAbc->pGia, NULL, pPars, 0, 0, pPars->fVerbose, pPars->fVerboseFlops );
        Abc_FrameUpdateGia( pAbc, pTemp );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( 0, "The network is combinational.\n" );
        return 0;
    }
    if ( fUseOld )
        pTemp = Cec_ManScorrCorrespondence( pAbc->pGia, pPars );
    else if ( fPartition )
        pTemp = Gia_ManScorrDivideTest( pAbc->pGia, pPars );
    else
        pTemp = Cec_ManLSCorrespondence( pAbc->pGia, pPars );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &scorr [-FCPX num] [-pkrecqowvh]\n" );
    Abc_Print( -2, "\t         performs signal correpondence computation\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-F num : the number of timeframes in inductive case [default = %d]\n", pPars->nFrames );
    Abc_Print( -2, "\t-P num : the number of timeframes in the prefix [default = %d]\n", pPars->nPrefix );
    Abc_Print( -2, "\t-X num : the number of iterations of little or no improvement [default = %d]\n", pPars->nLimitMax );
    Abc_Print( -2, "\t-p     : toggle using partitioning for the input AIG [default = %s]\n", fPartition? "yes": "no" );
    Abc_Print( -2, "\t-k     : toggle using constant correspondence [default = %s]\n", pPars->fConstCorr? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle using implication rings during refinement [default = %s]\n", pPars->fUseRings? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle using equivalences as choices [default = %s]\n", pPars->fMakeChoices? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle using circuit-based SAT solver [default = %s]\n", pPars->fUseCSat? "yes": "no" );
    Abc_Print( -2, "\t-q     : toggle quitting when PO is not a constant candidate [default = %s]\n", pPars->fStopWhenGone? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle calling old engine [default = %s]\n", fUseOld? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing verbose info about equivalent flops [default = %s]\n", pPars->fVerboseFlops? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Choice( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cec_ParChc_t Pars, * pPars = &Pars;
    Gia_Man_t * pTemp;
    int c;
    Cec_ManChcSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ccvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'c':
            pPars->fUseCSat ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Choice(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Cec_ManChoiceComputation( pAbc->pGia, pPars );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &choice [-C num] [-cvh]\n" );
    Abc_Print( -2, "\t         performs computation of structural choices\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-c     : toggle using circuit-based SAT solver [default = %s]\n", pPars->fUseCSat? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sat( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Int_t * Cbs2_ManSolveMiterNc( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStatus, int fVerbose );
    extern Vec_Int_t * Cbs3_ManSolveMiterNc( Gia_Man_t * pAig, int nConfs, int nRestarts, Vec_Str_t ** pvStatus, int fVerbose );
    Cec_ParSat_t ParsSat, * pPars = &ParsSat;
    Gia_Man_t * pTemp;
    int c;
    int fNewSolver = 0, fNewSolver2 = 0, fCSat = 0, f0Proved = 0, nRestarts = 1;
    Cec_ManSatSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "JCRSNanmtcxyzvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'J':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-J\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->SolverType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->SolverType < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRestarts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRestarts < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSatVarMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSatVarMax < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCallsRecycle = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCallsRecycle < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fSaveCexes ^= 1;
            break;
        case 'n':
            pPars->fNonChrono ^= 1;
            break;
        case 'm':
            pPars->fCheckMiter ^= 1;
            break;
        case 't':
            pPars->fLearnCls ^= 1;
            break;
        case 'c':
            fCSat ^= 1;
            break;
        case 'x':
            fNewSolver ^= 1;
            break;
        case 'y':
            fNewSolver2 ^= 1;
            break;
        case 'z':
            f0Proved ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Sat(): There is no AIG.\n" );
        return 1;
    }
    if ( fCSat )
    {
        Vec_Int_t * vCounters;
        Vec_Str_t * vStatus;
        if ( fNewSolver )
            vCounters = Cbs2_ManSolveMiterNc( pAbc->pGia, pPars->nBTLimit, &vStatus, pPars->fVerbose );
        else if ( fNewSolver2 )
            vCounters = Cbs3_ManSolveMiterNc( pAbc->pGia, pPars->nBTLimit, nRestarts, &vStatus, pPars->fVerbose );
        else if ( pPars->fLearnCls )
            vCounters = Tas_ManSolveMiterNc( pAbc->pGia, pPars->nBTLimit, &vStatus, pPars->fVerbose );
        else if ( pPars->fNonChrono )
            vCounters = Cbs_ManSolveMiterNc( pAbc->pGia, pPars->nBTLimit, &vStatus, f0Proved, pPars->fVerbose );
        else
            vCounters = Cbs_ManSolveMiter( pAbc->pGia, pPars->nBTLimit, &vStatus, pPars->fVerbose );
        Vec_IntFree( vCounters );
        Vec_StrFree( vStatus );
    }
    else
    {
        pTemp = Cec_ManSatSolving( pAbc->pGia, pPars, f0Proved );
        Abc_FrameUpdateGia( pAbc, pTemp );
    }
    if ( pAbc->pGia->vSeqModelVec )
    {
        Vec_Int_t * vStatuses = Abc_FrameDeriveStatusArray2( pAbc->pGia->vSeqModelVec );
        Abc_FrameReplacePoStatuses( pAbc, &vStatuses );
        Abc_FrameReplaceCexVec( pAbc, &pAbc->pGia->vSeqModelVec );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &sat [-JCRSN <num>] [-anmctxzvh]\n" );
    Abc_Print( -2, "\t         performs SAT solving for the combinational outputs\n" );
    Abc_Print( -2, "\t-J num : the SAT solver type [default = %d]\n", pPars->SolverType );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-R num : the max number of restarts at a node [default = %d]\n", nRestarts );
    Abc_Print( -2, "\t-S num : the min number of variables to recycle the solver [default = %d]\n", pPars->nSatVarMax );
    Abc_Print( -2, "\t-N num : the min number of calls to recycle the solver [default = %d]\n", pPars->nCallsRecycle );
    Abc_Print( -2, "\t-a     : toggle solving all outputs and saving counter-examples [default = %s]\n", pPars->fSaveCexes? "yes": "no" );
    Abc_Print( -2, "\t-n     : toggle using non-chronological backtracking [default = %s]\n", pPars->fNonChrono? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n", pPars->fCheckMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-c     : toggle using circuit-based SAT solver [default = %s]\n", fCSat? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle using learning in curcuit-based solver [default = %s]\n", pPars->fLearnCls? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle using new solver [default = %s]\n", fNewSolver? "yes": "no" );
    Abc_Print( -2, "\t-y     : toggle using new solver [default = %s]\n", fNewSolver2? "yes": "no" );
    Abc_Print( -2, "\t-z     : toggle replacing proved cones by const0 [default = %s]\n", f0Proved? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SatEnum( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gia_ManSatEnum( Gia_Man_t * p, int nConfLimit, int nTimeOut, int fVerbose );
    int c, nConfLimit = 0, nTimeOut = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CTvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SatEnum(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManSatEnum( pAbc->pGia, nConfLimit, nTimeOut, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &satenum [-CT <num>] [-vh]\n" );
    Abc_Print( -2, "\t         enumerates solutions of the combinational miter\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nConfLimit );
    Abc_Print( -2, "\t-T num : global timeout [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",   fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Fraig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Cec4_ManSetParams( Cec_ParFra_t * pPars );
    extern Gia_Man_t * Cec2_ManSimulateTest( Gia_Man_t * p, Cec_ParFra_t * pPars );
    extern Gia_Man_t * Cec3_ManSimulateTest( Gia_Man_t * p, Cec_ParFra_t * pPars );
    extern Gia_Man_t * Cec4_ManSimulateTest( Gia_Man_t * p, Cec_ParFra_t * pPars );
    extern void        Cec4_ManSimulateTest5( Gia_Man_t * p, int nConfs, int fVerbose );
    extern Gia_Man_t * Cec5_ManSimulateTest( Gia_Man_t * p, Cec_ParFra_t * pPars, int fCbs, int approxLim, int subBatchSz, int adaRecycle );
    extern Gia_Man_t * Gia_ManIvyFraig( Gia_Man_t * p, int nConfLimit, int fUseProve, int fVerbose );
    Cec_ParFra_t ParsFra, * pPars = &ParsFra; Gia_Man_t * pTemp;
    int c, fUseAlgo = 0, fUseAlgoG = 0, fUseAlgoX = 0, fUseAlgoY = 0, fUseSave = 0, fUseIvy = 0, fUseProve = 0;
    int fCbs = 1, approxLim = 600, subBatchSz = 1, adaRecycle = 500, nMaxNodes = 0;
    Cec4_ManSetParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "JWRILDCNPMrmdckngxysopwvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'J':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-J\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->jType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->jType < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nItersMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nItersMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLevelMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLevelMax < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nDepthMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDepthMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCallsRecycle = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCallsRecycle < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nGenIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGenIters < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nMaxNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxNodes < 0 )
                goto usage;
            break;
        case 'r':
            pPars->fRewriting ^= 1;
            break;
        case 'm':
            pPars->fCheckMiter ^= 1;
            break;
        case 'd':
            pPars->fDualOut ^= 1;
            break;
        case 'c':
            pPars->fRunCSat ^= 1;
            break;
        case 'k':
            pPars->fUseCones ^= 1;
            break;
        case 'n':
            fUseAlgo ^= 1;
            break;
        case 'g':
            fUseAlgoG ^= 1;
            break;
        case 'x':
            fUseAlgoX ^= 1;
            break;
        case 'y':
            fUseAlgoY ^= 1;
            break;
        case 's':
            fUseSave ^= 1;
            break;
        case 'o':
            fUseIvy ^= 1;
            break;
        case 'p':
            fUseProve ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Fraig(): There is no AIG.\n" );
        return 1;
    }
    if ( fUseSave )
    {
        Cec4_ManSimulateTest5( pAbc->pGia, pPars->nBTLimit, pPars->fVerbose );
        return 0;
    }
    else if ( fUseIvy && (!nMaxNodes || Gia_ManAndNum(pAbc->pGia) < nMaxNodes) )
        pTemp = Gia_ManIvyFraig( pAbc->pGia, pPars->nBTLimit, fUseProve, pPars->fVerbose );
    else if ( fUseAlgo )
        pTemp = Cec2_ManSimulateTest( pAbc->pGia, pPars );
    else if ( fUseAlgoG )
        pTemp = Cec3_ManSimulateTest( pAbc->pGia, pPars );
    else if ( fUseAlgoX )
        pTemp = Cec4_ManSimulateTest( pAbc->pGia, pPars );
    else if ( fUseAlgoY )
        pTemp = Cec5_ManSimulateTest( pAbc->pGia, pPars, fCbs, approxLim, subBatchSz, adaRecycle );
    else 
        pTemp = Cec_ManSatSweeping( pAbc->pGia, pPars, 0 );
    if ( pAbc->pGia->pCexSeq != NULL )
    {
        pAbc->Status  = 0;
        pAbc->nFrames = 0;
        Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    }
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &fraig [-JWRILDCNPM <num>] [-rmdckngxysopwvh]\n" );
    Abc_Print( -2, "\t         performs combinational SAT sweeping\n" );
    Abc_Print( -2, "\t-J num : the solver type [default = %d]\n", pPars->jType );
    Abc_Print( -2, "\t-W num : the number of simulation words [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-R num : the number of simulation rounds [default = %d]\n", pPars->nRounds );
    Abc_Print( -2, "\t-I num : the number of sweeping iterations [default = %d]\n", pPars->nItersMax );
    Abc_Print( -2, "\t-L num : the max number of levels of nodes to consider [default = %d]\n", pPars->nLevelMax );
    Abc_Print( -2, "\t-D num : the max number of steps of speculative reduction [default = %d]\n", pPars->nDepthMax );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-N num : the min number of calls to recycle the solver [default = %d]\n", pPars->nCallsRecycle );
    Abc_Print( -2, "\t-P num : the number of pattern generation iterations [default = %d]\n", pPars->nGenIters );
    Abc_Print( -2, "\t-M num : the node count limit to call the old sweeper [default = %d]\n", nMaxNodes );
    Abc_Print( -2, "\t-r     : toggle the use of AIG rewriting [default = %s]\n", pPars->fRewriting? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle miter vs. any circuit [default = %s]\n", pPars->fCheckMiter? "miter": "circuit" );
    Abc_Print( -2, "\t-d     : toggle using double output miters [default = %s]\n", pPars->fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle using circuit-based solver [default = %s]\n", pPars->fRunCSat? "yes": "no" );
    Abc_Print( -2, "\t-k     : toggle using logic cones in the SAT solver [default = %s]\n", pPars->fUseCones? "yes": "no" );
    Abc_Print( -2, "\t-n     : toggle using new implementation [default = %s]\n", fUseAlgo? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle using another new implementation [default = %s]\n", fUseAlgoG? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle using another new implementation [default = %s]\n", fUseAlgoX? "yes": "no" );
    Abc_Print( -2, "\t-y     : toggle using another new implementation [default = %s]\n", fUseAlgoY? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle dumping equivalences into a file [default = %s]\n", fUseSave? "yes": "no" );
    Abc_Print( -2, "\t-o     : toggle using the old SAT sweeper [default = %s]\n", fUseIvy? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle trying to prove when running the old SAT sweeper [default = %s]\n", fUseProve? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing even more verbose information [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9CFraig( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c;
    Ssc_Pars_t Pars, * pPars = &Pars;
    Ssc_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WCacvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fAppend ^= 1;
            break;
        case 'c':
            pPars->fVerify ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9CFraig(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Ssc_PerformSweepingConstr( pAbc->pGia, pPars );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &cfraig [-WC <num>] [-acvh]\n" );
    Abc_Print( -2, "\t         performs combinational SAT sweeping under constraints\n" );
    Abc_Print( -2, "\t         which are present in the AIG or set manually using \"constr\"\n" );
    Abc_Print( -2, "\t         (constraints are listed as last POs and true when they are 0)\n" );
    Abc_Print( -2, "\t-W num : the number of simulation words [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-a     : toggle appending constraints to the result [default = %s]\n", pPars->fAppend? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle performing internal verification [default = %s]\n", pPars->fVerify? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Srm( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * pFileNameIn = NULL;
    char pFileName[10] = "gsrm.aig", pFileName2[10] = "gsyn.aig";
    Gia_Man_t * pTemp, * pAux;
    int c, fVerbose = 0;
    int fSynthesis = 0;
    int fSpeculate = 1;
    int fSkipSome = 0;
    int fDualOut = 0;
    int fComb = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Adrsfcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a file name.\n" );
                goto usage;
            }
            pFileNameIn = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'd':
            fDualOut ^= 1;
            break;
        case 'r':
            fSynthesis ^= 1;
            break;
        case 's':
            fSpeculate ^= 1;
            break;
        case 'f':
            fSkipSome ^= 1;
            break;
        case 'c':
            fComb ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Srm(): There is no AIG.\n" );
        return 1;
    }
    if ( fComb )
    {
        extern int Cec4_ManSimulateOnlyTest( Gia_Man_t * p, int fVerbose );
        int Result = Cec4_ManSimulateOnlyTest( pAbc->pGia, fVerbose );
        extern Gia_Man_t * Gia_ManCombSpecReduce( Gia_Man_t * p );
        pTemp = Gia_ManCombSpecReduce( pAbc->pGia );
        Abc_FrameUpdateGia( pAbc, pTemp );
        Result = 0;
        return 0;
    }
    sprintf(pFileName,  "gsrm%s.aig", fSpeculate? "" : "s" );
    sprintf(pFileName2, "gsyn%s.aig", fSpeculate? "" : "s" );
    pTemp = Gia_ManSpecReduce( pAbc->pGia, fDualOut, fSynthesis, fSpeculate, fSkipSome, fVerbose );
    if ( pTemp )
    {
        if ( fSpeculate )
        {
            pTemp = Gia_ManSeqStructSweep( pAux = pTemp, 1, 1, 0 );
            Gia_ManStop( pAux );
        }
        Gia_AigerWrite( pTemp, pFileNameIn ? pFileNameIn : pFileName, 0, 0, 0 );
        Abc_Print( 1, "Speculatively reduced model was written into file \"%s\".\n", pFileName );
        Gia_ManPrintStatsShort( pTemp );
        Gia_ManStop( pTemp );
    }
    if ( fSynthesis )
    {
        pTemp = Gia_ManEquivReduce( pAbc->pGia, 1, fDualOut, 0, fVerbose );
        if ( pTemp )
        {
            pTemp = Gia_ManSeqStructSweep( pAux = pTemp, 1, 1, 0 );
            Gia_ManStop( pAux );

            Gia_AigerWrite( pTemp, pFileName2, 0, 0, 0 );
            Abc_Print( 1, "Reduced original network was written into file \"%s\".\n", pFileName2 );
            Gia_ManPrintStatsShort( pTemp );
            Gia_ManStop( pTemp );
        }
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &srm [-A file] [-drsfcvh]\n" );
    Abc_Print( -2, "\t          derives or writes speculatively reduced model into file \"%s\"\n", pFileName );
    Abc_Print( -2, "\t-A file : file name for dumping speculative-reduced model [default = \"gsrm.aig\"]\n" );
    Abc_Print( -2, "\t-d      : toggle creating dual-output miter [default = %s]\n", fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-r      : toggle writing reduced network for synthesis [default = %s]\n", fSynthesis? "yes": "no" );
    Abc_Print( -2, "\t-s      : toggle using speculation at the internal nodes [default = %s]\n", fSpeculate? "yes": "no" );
    Abc_Print( -2, "\t-f      : toggle filtering to remove redundant equivalences [default = %s]\n", fSkipSome? "yes": "no" );
    Abc_Print( -2, "\t-c      : toggle using combinational speculation [default = %s]\n", fComb? "yes": "no" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Srm2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char pFileName[10], * pFileName1, * pFileName2;
    Gia_Man_t * pTemp, * pAux;
    int fLatchA = 0, fLatchB = 0;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "abvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fLatchA ^= 1;
            break;
        case 'b':
            fLatchB ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Srm2(): There is no AIG.\n" );
        return 1;
    }
    if ( pAbc->pGia->pReprs == NULL || pAbc->pGia->pNexts == NULL )
    {
        Abc_Print( -1, "Equivalences are not defined.\n" );
        return 0;
    }
    if ( argc != globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Srm2(): Expecting two file names on the command line.\n" );
        return 1;
    }
    // get the input file name
    pFileName1 = argv[globalUtilOptind];
    pFileName2 = argv[globalUtilOptind+1];
    // create file name
    sprintf(pFileName,  "gsrm.aig" );
    pTemp = Gia_ManDup( pAbc->pGia );
    // copy equivalences
    pTemp->pReprs = ABC_ALLOC( Gia_Rpr_t, Gia_ManObjNum(pTemp) );
    memcpy( pTemp->pReprs, pAbc->pGia->pReprs, sizeof(Gia_Rpr_t) * Gia_ManObjNum(pTemp) );
    pTemp->pNexts = ABC_ALLOC( int, Gia_ManObjNum(pTemp) );
    memcpy( pTemp->pNexts, pAbc->pGia->pNexts, sizeof(int) * Gia_ManObjNum(pTemp) );
//Gia_ManPrintStats( pTemp, 0 );
    // filter the classes
    if ( !Gia_ManFilterEquivsForSpeculation( pTemp, pFileName1, pFileName2, fLatchA, fLatchB ) )
    {
        Gia_ManStop( pTemp );
        Abc_Print( -1, "Filtering equivalences has failed.\n" );
        return 1;
    }
//Gia_ManPrintStats( pTemp, 0 );
    pTemp = Gia_ManSpecReduce( pAux = pTemp, 0, 0, 1, 0, 0 );
    Gia_ManStop( pAux );
    if ( pTemp )
    {
        pTemp = Gia_ManSeqStructSweep( pAux = pTemp, 1, 1, 0 );
        Gia_ManStop( pAux );

        Gia_AigerWrite( pTemp, pFileName, 0, 0, 0 );
        Abc_Print( 1, "Speculatively reduced model was written into file \"%s\".\n", pFileName );
        Gia_ManPrintStatsShort( pTemp );
        Gia_ManStop( pTemp );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &srm2 [-abvh] <PartA_FileName> <PartB_FileName>\n" );
    Abc_Print( -2, "\t         writes speculatively reduced model into file \"%s\"\n", pFileName );
    Abc_Print( -2, "\t         only preserves equivalences across PartA and PartB\n" );
    Abc_Print( -2, "\t-a     : toggle using latches only in PartA [default = %s]\n", fLatchA? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle using latches only in PartB [default = %s]\n", fLatchB? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Filter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * pFileName1 = NULL, * pFileName2 = NULL;
    int fFlopsOnly = 0, fFlopsWith = 0, fUseRiDrivers = 0;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "fgivh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'f':
            fFlopsOnly ^= 1;
            break;
        case 'g':
            fFlopsWith ^= 1;
            break;
        case 'i':
            fUseRiDrivers ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Srm2(): There is no AIG.\n" );
        return 1;
    }
    if ( pAbc->pGia->pReprs == NULL || pAbc->pGia->pNexts == NULL )
    {
        Abc_Print( -1, "Equivalences are not defined.\n" );
        return 0;
    }
    if ( argc != globalUtilOptind && argc != globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Srm2(): Expecting two file names on the command line.\n" );
        return 1;
    }
    // filter using one of the choices
    if ( fFlopsOnly ^ fFlopsWith )
        Gia_ManFilterEquivsUsingLatches( pAbc->pGia, fFlopsOnly, fFlopsWith, fUseRiDrivers );
    // get the input file name
    if ( argc == globalUtilOptind + 2 )
    {
        pFileName1 = argv[globalUtilOptind];
        pFileName2 = argv[globalUtilOptind+1];
        if ( !Gia_ManFilterEquivsUsingParts( pAbc->pGia, pFileName1, pFileName2 ) )
        {
            Abc_Print( -1, "Filtering equivalences using PartA and PartB has failed.\n" );
            return 1;
        }
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &filter [-fgivh] <PartA_FileName> <PartB_FileName>\n" );
    Abc_Print( -2, "\t         performs filtering of equivalence classes\n" );
    Abc_Print( -2, "\t         (if Parts A/B are given, removes classes composed of one part)\n" );
    Abc_Print( -2, "\t-f     : toggle removing all elements except flops [default = %s]\n", fFlopsOnly? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle removing classes without flops [default = %s]\n", fFlopsWith? "yes": "no" );
    Abc_Print( -2, "\t-i     : toggle using flop inputs instead of flop outputs [default = %s]\n", fUseRiDrivers? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Reduce( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp, * pTemp2;
    int c, fVerbose = 0;
    int fUseAll = 0;
    int fDualOut = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "advh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'a':
            fUseAll ^= 1;
            break;
        case 'd':
            fDualOut ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Reduce(): There is no AIG.\n" );
        return 1;
    }
    if ( fUseAll )
    {
        pTemp = Gia_ManEquivReduce( pAbc->pGia, fUseAll, fDualOut, 0, fVerbose );
        pTemp = Gia_ManSeqStructSweep( pTemp2 = pTemp, 1, 1, 0 );
        Gia_ManStop( pTemp2 );
    }
    else
        pTemp = Gia_ManEquivReduceAndRemap( pAbc->pGia, 1, fDualOut );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &reduce [-advh]\n" );
    Abc_Print( -2, "\t         reduces the circuit using equivalence classes\n" );
    Abc_Print( -2, "\t-a     : toggle merging all equivalences [default = %s]\n", fUseAll? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle using dual-output merging [default = %s]\n", fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9EquivMark( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManEquivMark( Gia_Man_t * p, char * pFileName, int fSkipSome, int fVerbose );
    char * pFileName;
    int c, fVerbose = 0;
    int fSkipSome = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "fvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'f':
            fSkipSome ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9EquivMark(): There is no AIG.\n" );
        return 1;
    }
    if ( argc != globalUtilOptind + 1 )
        goto usage;
    // get the input file name
    pFileName = argv[globalUtilOptind];
    // mark equivalences
    Gia_ManEquivMark( pAbc->pGia, pFileName, fSkipSome, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &equiv_mark [-fvh] <miter.aig>\n" );
    Abc_Print( -2, "\t              marks equivalences using an external miter\n" );
    Abc_Print( -2, "\t-f          : toggle the use of filtered equivalences [default = %s]\n", fSkipSome? "yes": "no" );
    Abc_Print( -2, "\t-v          : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h          : print the command usage\n");
    Abc_Print( -2, "\t<miter.aig> : file with the external miter to read\n");
    Abc_Print( -2, "\t              \n" );
    Abc_Print( -2, "\t              The external miter should be generated by &srm -s\n" );
    Abc_Print( -2, "\t              and (partially) solved by any verification engine(s).\n" );
    Abc_Print( -2, "\t              The external miter should have as many POs as\n" );
    Abc_Print( -2, "\t              the number of POs in the current AIG plus\n" );
    Abc_Print( -2, "\t              the number of equivalences in the current AIG.\n" );
    Abc_Print( -2, "\t              If some POs are proved, the corresponding equivs\n" );
    Abc_Print( -2, "\t              are marked as proved, to be reduced by &reduce.\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9EquivFilter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManEquivFilter( Gia_Man_t * p, Vec_Int_t * vPoIds, int fVerbose );
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9EquivFilter(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManEquivFilter( pAbc->pGia, pAbc->vAbcObjIds, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &equiv_filter [-vh]\n" );
    Abc_Print( -2, "\t              filters equivalence candidates after disproving some SRM outputs\n" );
    Abc_Print( -2, "\t              (the array of disproved outputs should be given as pAbc->vAbcObjIds)\n" );
    Abc_Print( -2, "\t-v          : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h          : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Cec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cec_ParCec_t ParsCec, * pPars = &ParsCec;
    FILE * pFile;
    Gia_Man_t * pGias[2] = {NULL, NULL}, * pMiter;
    char ** pArgvNew;
    int c, nArgcNew, fUseSim = 0, fUseNewX = 0, fUseNewY = 0, fMiter = 0, fDualOutput = 0, fDumpMiter = 0;
    Cec_ManCecSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CTnmdasxytvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'n':
            pPars->fNaive ^= 1;
            break;
        case 'm':
            fMiter ^= 1;
            break;
        case 'd':
            fDualOutput ^= 1;
            break;
        case 'a':
            fDumpMiter ^= 1;
            break;
        case 's':
            pPars->fSilent ^= 1;
            break;
        case 'x':
            fUseNewX ^= 1;
            break;
        case 'y':
            fUseNewY ^= 1;
            break;
        case 't':
            fUseSim ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( fMiter )
    {
        if ( pAbc->pGia == NULL || nArgcNew != 0 )
        {
            Abc_Print( -1, "Abc_CommandAbc9Cec(): A miter cannot be given as an argument of command &cec and should be entered using &r.\n" );
            return 1;
        }
        if ( fDualOutput )
        {
            if ( Gia_ManPoNum(pAbc->pGia) & 1 )
            {
                Abc_Print( -1, "The dual-output miter should have an even number of outputs.\n" );
                return 1;
            }
            if ( !pPars->fSilent )
            Abc_Print( 1, "Assuming the current network is a double-output miter.\n" );
            pAbc->Status = Cec_ManVerify( pAbc->pGia, pPars );
        }
        else
        {
            abctime clk = Abc_Clock();
            Gia_Obj_t * pObj; int i;
            if ( !pPars->fSilent )
            Abc_Print( 1, "Assuming the current network is a single-output miter.\n" );
            if ( fUseSim )
            {
                abctime clk = Abc_Clock();
                extern int Gia_ManCheckSimEquiv( Gia_Man_t * p, int fVerbose );
                int Status = Gia_ManCheckSimEquiv( pAbc->pGia, pPars->fVerbose );
                if ( Status == 1 )
                    Abc_Print( 1, "Networks are equivalent.  " );
                else if ( Status == 0 )
                    Abc_Print( 1, "Networks are NOT equivalent.  " );
                else
                    Abc_Print( 1, "Networks are UNDECIDED.  " );
                Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
                return 0;
            }
            // handle the case when the output is disproved by an all-0 primary input pattern
            ABC_FREE( pAbc->pGia->pCexComb );
            Gia_ManSetPhase( pAbc->pGia );
            Gia_ManForEachCo( pAbc->pGia, pObj, i )
                if ( pObj->fPhase )
                {
                    pAbc->pGia->pCexComb = Abc_CexAlloc( 0, Gia_ManCiNum(pAbc->pGia), 1 );
                    if ( !pPars->fSilent )
                    {
                        Abc_Print( 1, "Networks are NOT EQUIVALENT. Output %d trivially differs (different phase).  ", i );
                        Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
                    }
                    pAbc->Status = 0;// satisfiable
                    break;
                }
            if ( pAbc->pGia->pCexComb == NULL )
            {
                Gia_Man_t * pTemp = Gia_ManDemiterToDual( pAbc->pGia );
                pAbc->Status = Cec_ManVerify( pTemp, pPars );
                ABC_SWAP( Abc_Cex_t *, pAbc->pGia->pCexComb, pTemp->pCexComb );
                Gia_ManStop( pTemp );
            }
        }
        Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexComb );
        return 0;
    }
    if ( nArgcNew > 2 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cec(): Wrong number of command-line arguments.\n" );
        return 1;
    }
    if ( nArgcNew == 2 )
    {
        char * pFileNames[2] = { pArgvNew[0], pArgvNew[1] }, * pTemp;
        int n;
        for ( n = 0; n < 2; n++ )
        {
            // fix the wrong symbol
            for ( pTemp = pFileNames[n]; *pTemp; pTemp++ )
                if ( *pTemp == '>' )
                    *pTemp = '\\';
            if ( (pFile = fopen( pFileNames[n], "r" )) == NULL )
            {
                Abc_Print( -1, "Cannot open input file \"%s\". ", pFileNames[n] );
                if ( (pFileNames[n] = Extra_FileGetSimilarName( pFileNames[n], ".aig", NULL, NULL, NULL, NULL )) )
                    Abc_Print( 1, "Did you mean \"%s\"?", pFileNames[n] );
                Abc_Print( 1, "\n" );
                return 1;
            }
            fclose( pFile );
            pGias[n] = Gia_AigerRead( pFileNames[n], 0, 0, 0 );
            if ( pGias[n] == NULL )
            {
                Abc_Print( -1, "Reading AIGER from file \"%s\" has failed.\n", pFileNames[n] );
                return 0;
            }
        }
    }
    else
    {
        char * FileName, * pTemp;
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Cec(): There is no current AIG.\n" );
            return 1;
        }
        pGias[0] = pAbc->pGia;
        if ( nArgcNew == 1 )
            FileName = pArgvNew[0];
        else
        {
            assert( nArgcNew == 0 );
            if ( pAbc->pGia->pSpec == NULL )
            {
                Abc_Print( -1, "File name is not given on the command line.\n" );
                return 1;
            }
            FileName = pAbc->pGia->pSpec;
        }
        // fix the wrong symbol
        for ( pTemp = FileName; *pTemp; pTemp++ )
            if ( *pTemp == '>' )
                *pTemp = '\\';
        if ( (pFile = fopen( FileName, "r" )) == NULL )
        {
            Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
            if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
                Abc_Print( 1, "Did you mean \"%s\"?", FileName );
            Abc_Print( 1, "\n" );
            return 1;
        }
        fclose( pFile );
        pGias[1] = Gia_AigerRead( FileName, 0, 0, 0 );
        if ( pGias[1] == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 0;
        }
    }
    // compute the miter
    if ( Gia_ManCiNum(pGias[0]) < 6 )
    {
        Gia_Man_t * pGias0 = Gia_ManDup( pGias[0] );
        Gia_Man_t * pGias1 = Gia_ManDup( pGias[1] );
        for ( c = Gia_ManCiNum(pGias[0]); c < 6; c++ )
        {
            Gia_ManAppendCi(pGias0);
            Gia_ManAppendCi(pGias1);
        }
        pMiter = Gia_ManMiter( pGias0, pGias1, 0, !fUseNewX && !fUseNewY, 0, 0, pPars->fVerbose );
        Gia_ManStop( pGias0 );
        Gia_ManStop( pGias1 );
    }
    else
        pMiter = Gia_ManMiter( pGias[0], pGias[1], 0, !fUseNewX && !fUseNewY, 0, 0, pPars->fVerbose );

    if ( pMiter )
    {
        if ( fDumpMiter )
        {
            Abc_Print( 0, "The verification miter is written into file \"%s\".\n", "cec_miter.aig" );
            Gia_AigerWrite( pMiter, "cec_miter.aig", 0, 0, 0 );
        }
        if ( pGias[0]->vSimsPi )
        {
            pMiter->vSimsPi = Vec_WrdDup(pGias[0]->vSimsPi); 
            pMiter->nSimWords = pGias[0]->nSimWords;
        }
        if ( fUseSim && Gia_ManCiNum(pMiter) > 40 )
        {
            Abc_Print( -1, "This type of CEC can only be applied to AIGs with no more than 40 inputs.\n" );
            return 0;
        }
        if ( fUseSim )
        {
            abctime clk = Abc_Clock();
            extern int Gia_ManCheckSimEquiv( Gia_Man_t * p, int fVerbose );
            int Status = Gia_ManCheckSimEquiv( pMiter, pPars->fVerbose );
            if ( Status == 1 )
                Abc_Print( 1, "Networks are equivalent.  " );
            else if ( Status == 0 )
                Abc_Print( 1, "Networks are NOT equivalent.  " );
            else
                Abc_Print( 1, "Networks are UNDECIDED.  " );
            Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
        }
        else if ( fUseNewX )
        {
            abctime clk = Abc_Clock();
            extern Gia_Man_t * Cec4_ManSimulateTest3( Gia_Man_t * p, int nBTLimit, int fVerbose );
            Gia_Man_t * pNew = Cec4_ManSimulateTest3( pMiter, pPars->nBTLimit, pPars->fVerbose );
            if ( Gia_ManAndNum(pNew) == 0 )
                Abc_Print( 1, "Networks are equivalent.  " );
            else
                Abc_Print( 1, "Networks are UNDECIDED.  " );
            Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
            Gia_ManStop( pNew );
        }
        else if ( fUseNewY )
        {
            abctime clk = Abc_Clock();
            extern Gia_Man_t * Cec5_ManSimulateTest3( Gia_Man_t * p, int nBTLimit, int fVerbose );
            Gia_Man_t * pNew = Cec5_ManSimulateTest3( pMiter, pPars->nBTLimit, pPars->fVerbose );
            if ( Gia_ManAndNum(pNew) == 0 )
                Abc_Print( 1, "Networks are equivalent.  " );
            else
                Abc_Print( 1, "Networks are UNDECIDED.  " );
            Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
            Gia_ManStop( pNew );
        }
        else
        {
            pAbc->Status = Cec_ManVerify( pMiter, pPars );
            Abc_FrameReplaceCex( pAbc, &pGias[0]->pCexComb );
        }
        Gia_ManStop( pMiter );
    }
    if ( pGias[0] != pAbc->pGia )
        Gia_ManStop( pGias[0] );
    Gia_ManStop( pGias[1] );
    return 0;

usage:
    Abc_Print( -2, "usage: &cec [-CT num] [-nmdasxytvwh]\n" );
    Abc_Print( -2, "\t         new combinational equivalence checker\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-n     : toggle using naive SAT-based checking [default = %s]\n", pPars->fNaive? "yes":"no");
    Abc_Print( -2, "\t-m     : toggle miter vs. two circuits [default = %s]\n", fMiter? "miter":"two circuits");
    Abc_Print( -2, "\t-d     : toggle using dual output miter [default = %s]\n", fDualOutput? "yes":"no");
    Abc_Print( -2, "\t-a     : toggle writing dual-output miter [default = %s]\n", fDumpMiter? "yes":"no");
    Abc_Print( -2, "\t-s     : toggle silent operation [default = %s]\n", pPars->fSilent ? "yes":"no");
    Abc_Print( -2, "\t-x     : toggle using new solver [default = %s]\n", fUseNewX? "yes":"no");
    Abc_Print( -2, "\t-y     : toggle using new solver [default = %s]\n", fUseNewY? "yes":"no");
    Abc_Print( -2, "\t-t     : toggle using simulation [default = %s]\n", fUseSim? "yes":"no");
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes":"no");
    Abc_Print( -2, "\t-w     : toggle printing SAT solver statistics [default = %s]\n", pPars->fVeryVerbose? "yes":"no");
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ICec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Cec_ParCec_t ParsCec, * pPars = &ParsCec;
    FILE * pFile;
    Gia_Man_t * pGias[2] = {NULL, NULL}, * pMiter;
    char ** pArgvNew;
    int c, nArgcNew, fUseNew = 0, fDumpMiter = 0;
    Cec_ManCecSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CTaxvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'a':
            fDumpMiter ^= 1;
            break;
        case 'x':
            fUseNew ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew > 2 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cec(): Wrong number of command-line arguments.\n" );
        return 1;
    }
    if ( nArgcNew == 2 )
    {
        char * pFileNames[2] = { pArgvNew[0], pArgvNew[1] }, * pTemp;
        int n;
        for ( n = 0; n < 2; n++ )
        {
            // fix the wrong symbol
            for ( pTemp = pFileNames[n]; *pTemp; pTemp++ )
                if ( *pTemp == '>' )
                    *pTemp = '\\';
            if ( (pFile = fopen( pFileNames[n], "r" )) == NULL )
            {
                Abc_Print( -1, "Cannot open input file \"%s\". ", pFileNames[n] );
                if ( (pFileNames[n] = Extra_FileGetSimilarName( pFileNames[n], ".aig", NULL, NULL, NULL, NULL )) )
                    Abc_Print( 1, "Did you mean \"%s\"?", pFileNames[n] );
                Abc_Print( 1, "\n" );
                return 1;
            }
            fclose( pFile );
            pGias[n] = Gia_AigerRead( pFileNames[n], 0, 0, 0 );
            if ( pGias[n] == NULL )
            {
                Abc_Print( -1, "Reading AIGER from file \"%s\" has failed.\n", pFileNames[n] );
                return 0;
            }
        }
    }
    else
    {
        char * FileName, * pTemp;
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Cec(): There is no current AIG.\n" );
            return 1;
        }
        pGias[0] = pAbc->pGia;
        if ( nArgcNew == 1 )
            FileName = pArgvNew[0];
        else
        {
            assert( nArgcNew == 0 );
            if ( pAbc->pGia->pSpec == NULL )
            {
                Abc_Print( -1, "File name is not given on the command line.\n" );
                return 1;
            }
            FileName = pAbc->pGia->pSpec;
        }
        // fix the wrong symbol
        for ( pTemp = FileName; *pTemp; pTemp++ )
            if ( *pTemp == '>' )
                *pTemp = '\\';
        if ( (pFile = fopen( FileName, "r" )) == NULL )
        {
            Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
            if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
                Abc_Print( 1, "Did you mean \"%s\"?", FileName );
            Abc_Print( 1, "\n" );
            return 1;
        }
        fclose( pFile );
        pGias[1] = Gia_AigerRead( FileName, 0, 0, 0 );
        if ( pGias[1] == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 0;
        }
    }
    // compute the miter
    pMiter = Gia_ManMiterInverse( pGias[0], pGias[1], !fUseNew, pPars->fVerbose );
    if ( pMiter )
    {
        if ( fDumpMiter )
        {
            Abc_Print( 0, "The verification miter is written into file \"%s\".\n", "cec_miter.aig" );
            Gia_AigerWrite( pMiter, "cec_miter.aig", 0, 0, 0 );
        }
        if ( fUseNew )
        {
            abctime clk = Abc_Clock();
            extern Gia_Man_t * Cec4_ManSimulateTest3( Gia_Man_t * p, int nBTLimit, int fVerbose );
            Gia_Man_t * pNew = Cec4_ManSimulateTest3( pMiter, pPars->nBTLimit, pPars->fVerbose );
            if ( Gia_ManAndNum(pNew) == 0 )
                Abc_Print( 1, "Networks are equivalent.  " );
            else
                Abc_Print( 1, "Networks are UNDECIDED.  " );
            Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
            Gia_ManStop( pNew );
        }
        else
        {
            pAbc->Status = Cec_ManVerify( pMiter, pPars );
            Abc_FrameReplaceCex( pAbc, &pGias[0]->pCexComb );
        }
        Gia_ManStop( pMiter );
    }
    if ( pGias[0] != pAbc->pGia )
        Gia_ManStop( pGias[0] );
    Gia_ManStop( pGias[1] );
    return 0;

usage:
    Abc_Print( -2, "usage: &icec [-CT num] [-axvwh]\n" );
    Abc_Print( -2, "\t         combinational equivalence checker for inverse circuits\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-a     : toggle writing the miter [default = %s]\n", fDumpMiter? "yes":"no");
    Abc_Print( -2, "\t-x     : toggle using new solver [default = %s]\n", fUseNew? "yes":"no");
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes":"no");
    Abc_Print( -2, "\t-w     : toggle printing SAT solver statistics [default = %s]\n", pPars->fVeryVerbose? "yes":"no");
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Verify( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char * pFileSpec = NULL;
    int c, nBTLimit = 1000, nTimeLim = 0, fSeq = 0, fDumpFiles = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CTsdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeLim < 0 )
                goto usage;
            break;
        case 's':
            fSeq ^= 1;
            break;
        case 'd':
            fDumpFiles ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
    {
        pFileSpec = argv[globalUtilOptind];
        Extra_FileNameCorrectPath( pFileSpec );
        printf( "Taking spec from file \"%s\".\n", pFileSpec );
    }
    Gia_ManVerifyWithBoxes( pAbc->pGia, nBTLimit, nTimeLim, fSeq, fDumpFiles, fVerbose, pFileSpec );
    return 0;

usage:
    Abc_Print( -2, "usage: &verify [-CT num] [-sdvh] <file>\n" );
    Abc_Print( -2, "\t         performs verification of combinational design\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n",  nTimeLim );
    Abc_Print( -2, "\t-s     : toggle using sequential verification [default = %s]\n",  fSeq? "yes":"no");
    Abc_Print( -2, "\t-d     : toggle dumping AIGs to be compared [default = %s]\n",    fDumpFiles? "yes":"no");
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n",                 fVerbose? "yes":"no");
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : optional file name with the spec [default = not used]\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sweep( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    Dch_Pars_t Pars, * pPars = &Pars;
    int c;
    Dch_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WCStvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSatVarMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSatVarMax < 0 )
                goto usage;
            break;
        case 't':
            pPars->fSimulateTfo ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Sweep(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManBoxNum(pAbc->pGia) && pAbc->pGia->pAigExtra == NULL )
    {
        printf( "Timing manager is given but there is no GIA of boxes.\n" );
        return 0;
    }
    if ( Gia_ManBoxNum(pAbc->pGia) )
        pTemp = Gia_ManSweepWithBoxes( pAbc->pGia, pPars, NULL, 0, 0, pPars->fVerbose, 0 );
    else
        pTemp = Gia_ManFraigSweepSimple( pAbc->pGia, pPars );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &sweep [-WCS num] [-tvh]\n" );
    Abc_Print( -2, "\t         performs SAT sweeping for AIG with boxes\n" );
    Abc_Print( -2, "\t-W num : the max number of simulation words [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-S num : the max number of SAT variables [default = %d]\n", pPars->nSatVarMax );
    Abc_Print( -2, "\t-t     : toggle simulation of the TFO classes [default = %s]\n", pPars->fSimulateTfo? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Force( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int nIters     = 20;
    int fClustered =  1;
    int fVerbose   =  1;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Icvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIters < 0 )
                goto usage;
            break;
        case 'c':
            fClustered ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Force(): There is no AIG.\n" );
        return 1;
    }
    For_ManExperiment( pAbc->pGia, nIters, fClustered, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &force [-I <num>] [-cvh]\n" );
    Abc_Print( -2, "\t         one-dimensional placement algorithm FORCE introduced by\n" );
    Abc_Print( -2, "\t         F. A. Aloul, I. L. Markov, and K. A. Sakallah (GLSVLSI�03).\n" );
    Abc_Print( -2, "\t-I num : the number of refinement iterations [default = %d]\n", nIters );
    Abc_Print( -2, "\t-c     : toggle clustered representation [default = %s]\n", fClustered? "yes":"no");
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes":"no");
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Embed( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Emb_Par_t Pars, * pPars = &Pars;
    int c;
    pPars->nDims      = 30;
    pPars->nIters     = 10;
    pPars->nSols      =  2;
    pPars->fRefine    =  0;
    pPars->fCluster   =  0;
    pPars->fDump      =  0;
    pPars->fDumpLarge =  0;
    pPars->fShowImage =  0;
    pPars->fVerbose   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "DIrcdlsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nDims = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDims < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIters < 0 )
                goto usage;
            break;
        case 'r':
            pPars->fRefine ^= 1;
            break;
        case 'c':
            pPars->fCluster ^= 1;
            break;
        case 'd':
            pPars->fDump ^= 1;
            break;
        case 'l':
            pPars->fDumpLarge ^= 1;
            break;
        case 's':
            pPars->fShowImage ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Embed(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManSolveProblem( pAbc->pGia, pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: &embed [-DI <num>] [-rdlscvh]\n" );
    Abc_Print( -2, "\t         fast placement based on high-dimensional embedding from\n" );
    Abc_Print( -2, "\t         D. Harel and Y. Koren, \"Graph drawing by high-dimensional\n" );
    Abc_Print( -2, "\t         embedding\", J. Graph Algs & Apps, 2004, Vol 8(2), pp. 195-217\n" );
    Abc_Print( -2, "\t-D num : the number of dimensions for embedding [default = %d]\n", pPars->nDims );
    Abc_Print( -2, "\t-I num : the number of refinement iterations [default = %d]\n", pPars->nIters );
    Abc_Print( -2, "\t-r     : toggle the use of refinement [default = %s]\n", pPars->fRefine? "yes":"no");
    Abc_Print( -2, "\t-c     : toggle clustered representation [default = %s]\n", pPars->fCluster? "yes":"no");
    Abc_Print( -2, "\t-d     : toggle dumping placement into a Gnuplot file [default = %s]\n", pPars->fDump? "yes":"no");
    Abc_Print( -2, "\t-l     : toggle dumping Gnuplot for large placement [default = %s]\n", pPars->fDumpLarge? "yes":"no");
    Abc_Print( -2, "\t-s     : toggle showing image if Gnuplot is installed [default = %s]\n", pPars->fShowImage? "yes":"no");
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes":"no");
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sopb( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int nLevelMax   = 0;
    int nTimeWindow = 0;
    int nCutNum     = 8;
    int nRelaxRatio = 0;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "LWCRvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevelMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevelMax < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeWindow = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeWindow < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutNum < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRelaxRatio < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Sopb(): There is no AIG.\n" );
        return 1;
    }
    if ( nLevelMax || nTimeWindow )
        pTemp = Gia_ManPerformSopBalanceWin( pAbc->pGia, nLevelMax, nTimeWindow, nCutNum, nRelaxRatio, fVerbose );
    else
        pTemp = Gia_ManPerformSopBalance( pAbc->pGia, nCutNum, nRelaxRatio, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &sopb [-LWCR num] [-vh]\n" );
    Abc_Print( -2, "\t         performs SOP balancing\n" );
    Abc_Print( -2, "\t-L num : optimize paths above this level [default = %d]\n", nLevelMax );
    Abc_Print( -2, "\t-W num : optimize paths falling into this window [default = %d]\n", nTimeWindow );
    Abc_Print( -2, "\t-C num : the number of cuts at a node [default = %d]\n", nCutNum );
    Abc_Print( -2, "\t-R num : the delay relaxation ratio (num >= 0) [default = %d]\n", nRelaxRatio );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Dsdb( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int nLevelMax   = 0;
    int nTimeWindow = 0;
    int nLutSize    = 6;
    int nCutNum     = 8;
    int nRelaxRatio = 0;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "LWKCRvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevelMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevelMax < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeWindow = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeWindow < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
         case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutNum < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRelaxRatio < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Dsdb(): There is no AIG.\n" );
        return 1;
    }
    if ( nLutSize > DAU_MAX_VAR )
    {
        printf( "Abc_CommandAbc9Dsdb(): Size of the required DSD manager (%d) exceeds the precompiled limit (%d) (change parameter DAU_MAX_VAR).\n", nLutSize, DAU_MAX_VAR );
        return 0;
    }
    if ( Abc_FrameReadManDsd2() && nLutSize > If_DsdManVarNum((If_DsdMan_t*)Abc_FrameReadManDsd2()) )
    {
        printf( "Abc_CommandAbc9Dsdb(): Incompatible size of the DSD manager (run \"dsd_free -b\").\n" );
        return 0;
    }
    if ( nLevelMax || nTimeWindow )
        pTemp = Gia_ManPerformDsdBalanceWin( pAbc->pGia, nLevelMax, nTimeWindow, nLutSize, nCutNum, nRelaxRatio, fVerbose );
    else
        pTemp = Gia_ManPerformDsdBalance( pAbc->pGia, nLutSize, nCutNum, nRelaxRatio, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &dsdb [-LWKCR num] [-vh]\n" );
    Abc_Print( -2, "\t         performs DSD balancing\n" );
    Abc_Print( -2, "\t-L num : optimize paths above this level [default = %d]\n", nLevelMax );
    Abc_Print( -2, "\t-W num : optimize paths falling into this window [default = %d]\n", nTimeWindow );
    Abc_Print( -2, "\t-K num : the number of LUT inputs (LUT size) [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-C num : the number of cuts at a node [default = %d]\n", nCutNum );
    Abc_Print( -2, "\t-R num : the delay relaxation ratio (num >= 0) [default = %d]\n", nRelaxRatio );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Flow( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManPerformFlow( int fIsMapped, int nAnds, int nLevels, int nLutSize, int nCutNum, int fMinAve, int fUseMfs, int fVerbose );
    int nLutSize    =  6;
    int nCutNum     =  8;
    int fMinAve     =  0;
    int fUseMfs     =  0;
    int c, fVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCtmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
         case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutNum < 0 )
                goto usage;
            break;
        case 't':
            fMinAve ^= 1;
            break;
        case 'm':
            fUseMfs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Flow(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManPerformFlow( Gia_ManHasMapping(pAbc->pGia), Gia_ManAndNum(pAbc->pGia), Gia_ManLevelNum(pAbc->pGia), nLutSize, nCutNum, fMinAve, fUseMfs, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &flow [-KC num] [-tmvh]\n" );
    Abc_Print( -2, "\t         integration optimization and mapping flow\n" );
    Abc_Print( -2, "\t-K num : the number of LUT inputs (LUT size) [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-C num : the number of cuts at a node [default = %d]\n", nCutNum );
    Abc_Print( -2, "\t-t     : toggle minimizing average rather than max delay [default = %s]\n", fMinAve? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle using \"mfs2\" in the script [default = %s]\n", fUseMfs? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Flow2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, int nCutNum, int fBalance, int fMinAve, int fUseMfs, int fVerbose );
    int nLutSize    =  6;
    int nCutNum     =  8;
    int fBalance    =  0;
    int fMinAve     =  0;
    int fUseMfs     =  0;
    int c, fVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCbtmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
         case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutNum < 0 )
                goto usage;
            break;
        case 'b':
            fBalance ^= 1;
            break;
        case 't':
            fMinAve ^= 1;
            break;
        case 'm':
            fUseMfs ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Flow2(): There is no AIG.\n" );
        return 1;
    }
    Gia_ManPerformFlow2( Gia_ManHasMapping(pAbc->pGia), Gia_ManAndNum(pAbc->pGia), Gia_ManLevelNum(pAbc->pGia), nLutSize, nCutNum, fBalance, fMinAve, fUseMfs, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &flow2 [-KC num] [-btmvh]\n" );
    Abc_Print( -2, "\t         integration optimization and mapping flow\n" );
    Abc_Print( -2, "\t-K num : the number of LUT inputs (LUT size) [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-C num : the number of cuts at a node [default = %d]\n", nCutNum );
    Abc_Print( -2, "\t-b     : toggle using SOP balancing during synthesis [default = %s]\n", fBalance? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle minimizing average (not maximum) level [default = %s]\n", fMinAve? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle using \"mfs2\" in the script [default = %s]\n", fUseMfs? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Flow3( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManPerformFlow3( int nLutSize, int nCutNum, int fBalance, int fMinAve, int fUseMfs, int fUseLutLib, int fVerbose );
    int nLutSize    =  6;
    int nCutNum     =  8;
    int fBalance    =  0;
    int fMinAve     =  0;
    int fUseMfs     =  1;
    int fUseLutLib  =  0;
    int c, fVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCbtmlvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
         case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutNum < 0 )
                goto usage;
            break;
        case 'b':
            fBalance ^= 1;
            break;
        case 't':
            fMinAve ^= 1;
            break;
        case 'm':
            fUseMfs ^= 1;
            break;
        case 'l':
            fUseLutLib ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Flow3(): There is no AIG.\n" );
        return 1;
    }
    if ( fUseLutLib && Abc_FrameReadLibLut() == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Flow3(): Please enter LUT library using \'read_lut\'.\n" );
        return 1;
    }
    Gia_ManPerformFlow3( nLutSize, nCutNum, fBalance, fMinAve, fUseMfs, fUseLutLib, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &flow3 [-KC num] [-btmlvh]\n" );
    Abc_Print( -2, "\t         integration optimization and mapping flow\n" );
    Abc_Print( -2, "\t-K num : the number of LUT inputs (LUT size) [default = %d]\n",           nLutSize );
    Abc_Print( -2, "\t-C num : the number of cuts at a node [default = %d]\n",                  nCutNum );
    Abc_Print( -2, "\t-b     : toggle using SOP balancing during synthesis [default = %s]\n",   fBalance? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle minimizing average (not maximum) level [default = %s]\n", fMinAve? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle using \"mfs2\" in the script [default = %s]\n",           fUseMfs? "yes": "no" );
    Abc_Print( -2, "\t-l     : toggle using previously entered LUT library [default = %s]\n",   fUseLutLib? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",           fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9If( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[200];
    char LutSize[200];
    Gia_Man_t * pNew;
    If_Par_t Pars, * pPars = &Pars;
    int c;
    // set defaults
    Gia_ManSetIfParsDefault( pPars );
    if ( pAbc->pLibLut == NULL )
    {
        Abc_Print( -1, "LUT library is not given. Using default LUT library.\n" );
        pAbc->pLibLut = If_LibLutSetSimple( 6 );
    }
    pPars->pLutLib = (If_LibLut_t *)pAbc->pLibLut;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCFAGRDEWSTXYqalepmrsdbgxyofuijkztncvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 0 )
                goto usage;
            // if the LUT size is specified, disable library
            pPars->pLutLib = NULL;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutsMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nFlowIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFlowIters < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nAreaIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAreaIters < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by a positive integer no less than 3.\n" );
                goto usage;
            }
            pPars->nGateSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGateSize < 2 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRelaxRatio < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by a positive integer 0,1,or 2.\n" );
                goto usage;
            }
            pPars->nStructType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nStructType < 0 || pPars->nStructType > 2 )
                goto usage;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by a positive integer 0,1,or 2.\n" );
                goto usage;
            }
            pPars->nAndDelay = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAndArea < 0 )
                goto usage;
            break;
        case 'Y':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Y\" should be followed by a positive integer 0,1,or 2.\n" );
                goto usage;
            }
            pPars->nAndArea = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAndDelay < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->Epsilon = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->Epsilon < 0.0 || pPars->Epsilon > 1.0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->WireDelay = (float)atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->WireDelay < 0.0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by string.\n" );
                goto usage;
            }
            pPars->pLutStruct = argv[globalUtilOptind];
            globalUtilOptind++;
            if ( strlen(pPars->pLutStruct) != 2 && strlen(pPars->pLutStruct) != 3 )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a 2- or 3-char string (e.g. \"44\" or \"555\").\n" );
                goto usage;
            }
            break;
        case 'q':
            pPars->fPreprocess ^= 1;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'r':
            pPars->fExpRed ^= 1;
            break;
        case 'l':
            pPars->fLut6Filter ^= 1;
            break;
        case 'e':
            pPars->fEdge ^= 1;
            break;
        case 'p':
            pPars->fPower ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 's':
            pPars->fDelayOptLut ^= 1;
            break;
        case 'd':
            pPars->fUse34Spec ^= 1;
            break;
        case 'b':
            //pPars->fUseBat ^= 1;
            pPars->fUseCheck1 ^= 1;
            break;
        case 'g':
            pPars->fDelayOpt ^= 1;
            break;
        case 'x':
            pPars->fDsdBalance ^= 1;
            break;
        case 'y':
            pPars->fUserRecLib ^= 1;
            break;
        case 'o':
            pPars->fUseBuffs ^= 1;
            break;
        case 'f':
            pPars->fEnableCheck75 ^= 1;
            break;
        case 'u':
            pPars->fEnableCheck75u ^= 1;
            break;
        case 'i':
            //pPars->fUseCofVars ^= 1;
            pPars->fUseCheck2 ^= 1;
            break;
//        case 'j':
//            pPars->fEnableCheck07 ^= 1;
//            break;
        case 'j':
            pPars->fUseAndVars ^= 1;
            break;
        case 'k':
            pPars->fUseDsdTune ^= 1;
            break;
        case 'z':
            pPars->fDeriveLuts ^= 1;
            break;
        case 't':
            pPars->fDoAverage ^= 1;
            break;
        case 'n':
            pPars->fUseDsd ^= 1;
            break;
        case 'c':
            pPars->fUseTtPerm ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVerboseTrace ^= 1;
            break;
        case 'h':
            pPars->fHashMapping ^= 1;
            break;
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        if ( !Abc_FrameReadFlag("silentmode") )
        Abc_Print( -1, "Empty GIA network.\n" );
        return 0;
    }
    if ( Gia_ManBufNum(pAbc->pGia) )
    {
        Abc_Print( -1, "This command does not work with barrier buffers.\n" );
        return 1;
    }
    if ( Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Current AIG has mapping. Run \"&st\".\n" );
        return 1;
    }

    if ( pPars->nLutSize == -1 )
    {
        if ( pPars->pLutLib == NULL )
        {
            Abc_Print( -1, "The LUT library is not given.\n" );
            return 1;
        }
        // get LUT size from the library
        pPars->nLutSize = pPars->pLutLib->LutMax;
        // if variable pin delay, force truth table computation
//        if ( pPars->pLutLib->fVarPinDelays )
//            pPars->fTruth = 1;
    }

    if ( pPars->nLutSize < 2 || pPars->nLutSize > IF_MAX_LUTSIZE )
    {
        Abc_Print( -1, "Incorrect LUT size (%d).\n", pPars->nLutSize );
        return 1;
    }

    if ( pPars->nCutsMax < 1 || pPars->nCutsMax >= (1<<12) )
    {
        Abc_Print( -1, "Incorrect number of cuts.\n" );
        return 1;
    }

    // enable truth table computation if choices are selected
    if ( Gia_ManHasChoices(pAbc->pGia) )
    {
//        if ( !Abc_FrameReadFlag("silentmode") )
//            Abc_Print( 0, "Performing LUT mapping with choices.\n" );
        pPars->fExpRed = 0;
    }

    if ( pPars->fUseBat )
    {
        if ( pPars->nLutSize < 4 || pPars->nLutSize > 6 )
        {
            Abc_Print( -1, "This feature only works for {4,5,6}-LUTs.\n" );
            return 1;
        }
        pPars->fCutMin = 1;
    }

    if ( pPars->fEnableCheck07 + pPars->fUseCofVars + pPars->fUseDsdTune + pPars->fEnableCheck75 + pPars->fEnableCheck75u + (pPars->pLutStruct != NULL) > 1 )
    {
        Abc_Print( -1, "Only one additional check can be performed at the same time.\n" );
        return 1;
    }
    if ( pPars->fEnableCheck07 )
    {
        if ( pPars->nLutSize < 6 || pPars->nLutSize > 7 )
        {
            Abc_Print( -1, "This feature only works for {6,7}-LUTs.\n" );
            return 1;
        }
        pPars->pFuncCell = If_CutPerformCheck07;
        pPars->fCutMin = 1;
    }
    if ( pPars->fUseCheck1 || pPars->fUseCheck2 )
    {
        if ( pPars->nLutSize > 6 )
        {
            Abc_Print( -1, "This feature only works for no more than 6-LUTs.\n" );
            return 1;
        }
        pPars->pFuncCell = pPars->fUseCheck2 ? If_MatchCheck2 : If_MatchCheck1;
        pPars->fCutMin = 1;
    }
    if ( pPars->fUseCofVars )
    {
        if ( !(pPars->nLutSize & 1) )
        {
            Abc_Print( -1, "This feature only works for odd-sized LUTs.\n" );
            return 1;
        }
        pPars->fCutMin = 1;
    }
    if ( pPars->fUseAndVars )
        pPars->fCutMin = 1;
    if ( pPars->fUseDsdTune )
    {
        If_DsdMan_t * pDsdMan = (If_DsdMan_t *)Abc_FrameReadManDsd();
        if ( pDsdMan == NULL )
        {
            Abc_Print( -1, "DSD manager is not available.\n" );
            return 1;
        }
        if ( pPars->nLutSize > If_DsdManVarNum(pDsdMan) )
        {
            Abc_Print( -1, "LUT size (%d) is more than the number of variables in the DSD manager (%d).\n", pPars->nLutSize, If_DsdManVarNum(pDsdMan) );
            return 1;
        }
        if ( pPars->fDeriveLuts && If_DsdManGetCellStr(pDsdMan) == NULL )
        {
            Abc_Print( -1, "DSD manager is not matched with any particular cell.\n" );
            return 1;
        }
        pPars->fCutMin = 1;
        pPars->fUseDsd = 1;
        If_DsdManSetNewAsUseless( pDsdMan );
    }
    if ( pPars->fEnableCheck75 || pPars->fEnableCheck75u )
    {
        if ( pPars->fEnableCheck75 && pPars->fEnableCheck75u )
        {
            Abc_Print( -1, "Switches -f and -u are not compatible.\n" );
            return 1;
        }
        if ( pPars->nLutSize < 5 || pPars->nLutSize > 8 )
        {
            Abc_Print( -1, "This feature only works for {6,7,8}-LUTs.\n" );
            return 1;
        }
        pPars->pFuncCell = If_CutPerformCheck75;
        pPars->fCutMin = 1;
    }
    if ( pPars->pLutStruct )
    {
        if ( pPars->fDsdBalance )
        {
            Abc_Print( -1, "Incompatible options (-S and -x).\n" );
            return 1;
        }
        if ( pPars->nLutSize < 6 || pPars->nLutSize > 16 )
        {
            Abc_Print( -1, "This feature only works for [6;16]-LUTs.\n" );
            return 1;
        }
        pPars->pFuncCell = pPars->fDelayOptLut ? NULL : If_CutPerformCheck16;
        pPars->fCutMin = 1;
    }

    if ( pPars->fUse34Spec )
    {
        pPars->fTruth    = 1;
        pPars->fCutMin   = 1;
        pPars->nLutSize  = 4;
    }

    // enable truth table computation if cut minimization is selected
    if ( pPars->fCutMin || pPars->fDeriveLuts )
    {
        pPars->fTruth = 1;
        pPars->fExpRed = 0;
        if ( pPars->pLutStruct == NULL && !pPars->fUseDsdTune )
            pPars->fDeriveLuts = 1;
    }
    // modify the subgraph recording
    if ( pPars->fUserRecLib )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
        pPars->fUsePerm    =  1;
        pPars->pLutLib     =  NULL;
    }
    // modify for delay optimization
    if ( pPars->fDelayOpt || pPars->fDsdBalance || pPars->fDelayOptLut )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
        pPars->fUseDsd     =  pPars->fDsdBalance || pPars->fDelayOptLut;
        pPars->pLutLib     =  NULL;
    }
    // modify for delay optimization
    if ( pPars->nGateSize > 0 )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
        pPars->fUsePerm    =  1;
        pPars->pLutLib     =  NULL;
        pPars->nLutSize    =  pPars->nGateSize;
    }

    if ( pPars->fUseDsd || pPars->fUseTtPerm || pPars->fLut6Filter )
    {
        pPars->fTruth      =  1;
        pPars->fCutMin     =  1;
        pPars->fExpRed     =  0;
    }

    if ( pPars->fUseDsd )
    {
        int LutSize = (pPars->pLutStruct && pPars->pLutStruct[2] == 0)? pPars->pLutStruct[0] - '0' : 0;
        If_DsdMan_t * p = (If_DsdMan_t *)Abc_FrameReadManDsd();
        if ( pPars->pLutStruct && pPars->pLutStruct[2] != 0 )
        {
            printf( "DSD only works for LUT structures XY.\n" );
            return 0;
        }
        if ( p && pPars->nLutSize > If_DsdManVarNum(p) )
        {
            printf( "DSD manager has incompatible number of variables.\n" );
            return 0;
        }
        if ( p && LutSize != If_DsdManLutSize(p) && !pPars->fDsdBalance )
        {
            printf( "DSD manager has different LUT size.\n" );
            return 0;
        }
        if ( p == NULL )
        {
            if ( LutSize > DAU_MAX_VAR || pPars->nLutSize > DAU_MAX_VAR )
            {
                printf( "Size of required DSD manager (%d) exceeds the precompiled limit (%d) (change parameter DAU_MAX_VAR).\n", LutSize, DAU_MAX_VAR );
                return 0;
            }
            Abc_FrameSetManDsd( If_DsdManAlloc(pPars->nLutSize, LutSize) );
        }
    }

    if ( pPars->fUserRecLib )
    {
        if ( !Abc_NtkRecIsRunning3() )
        {
            printf( "LMS manager is not running (use \"rec_start3\").\n" );
            return 0;
        }
        if ( Abc_NtkRecInputNum3() != pPars->nLutSize )
        {
            printf( "The number of library inputs (%d) different from the K parameters (%d).\n", Abc_NtkRecInputNum3(), pPars->nLutSize );
            return 0;
        }
    }

    // complain if truth tables are requested but the cut size is too large
    if ( pPars->fTruth && pPars->nLutSize > IF_MAX_FUNC_LUTSIZE )
    {
        Abc_Print( -1, "Truth tables cannot be computed for LUT larger than %d inputs.\n", IF_MAX_FUNC_LUTSIZE );
        return 1;
    }
    if ( pAbc->pGia->pManTime && pAbc->pLibBox == NULL )
    {
        Abc_Print( -1, "Design has boxes but box library is not entered.\n" );
        return 1;
    }

    // add wire delay to LUT library delays
    if ( pPars->WireDelay > 0 && pPars->pLutLib )
    {
        int i, k;
        for ( i = 0; i <= pPars->pLutLib->LutMax; i++ )
            for ( k = 0; k <= i; k++ )
                pPars->pLutLib->pLutDelays[i][k] += pPars->WireDelay;
    }
    // perform mapping
    pNew = Gia_ManPerformMapping( pAbc->pGia, pPars );
    // subtract wire delay from LUT library delays
    if ( pPars->WireDelay > 0 && pPars->pLutLib )
    {
        int i, k;
        for ( i = 0; i <= pPars->pLutLib->LutMax; i++ )
            for ( k = 0; k <= i; k++ )
                pPars->pLutLib->pLutDelays[i][k] -= pPars->WireDelay;
    }
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9If(): Mapping of GIA has failed.\n" );
        return 1;
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%.2f", pPars->DelayTarget );
    if ( pPars->nLutSize == -1 )
        sprintf(LutSize, "library" );
    else
        sprintf(LutSize, "%d", pPars->nLutSize );
    Abc_Print( -2, "usage: &if [-KCFAGRTXY num] [-DEW float] [-S str] [-qarlepmsdbgxyofuijkztnchvw]\n" );
    Abc_Print( -2, "\t           performs FPGA technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : the number of LUT inputs (2 < num < %d) [default = %s]\n", IF_MAX_LUTSIZE+1, LutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (0 < num < 2^12) [default = %d]\n", pPars->nCutsMax );
    Abc_Print( -2, "\t-F num   : the number of area flow recovery iterations (num >= 0) [default = %d]\n", pPars->nFlowIters );
    Abc_Print( -2, "\t-A num   : the number of exact area recovery iterations (num >= 0) [default = %d]\n", pPars->nAreaIters );
    Abc_Print( -2, "\t-G num   : the max AND/OR gate size for mapping (0 = unused) [default = %d]\n", pPars->nGateSize );
    Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n", pPars->nRelaxRatio );
    Abc_Print( -2, "\t-T num   : the type of LUT structures [default = any]\n", pPars->nStructType );
    Abc_Print( -2, "\t-X num   : delay of AND-gate in LUT library units [default = %d]\n", pPars->nAndDelay );
    Abc_Print( -2, "\t-Y num   : area of AND-gate in LUT library units [default = %d]\n", pPars->nAndArea );
    Abc_Print( -2, "\t-D float : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-E float : sets epsilon used for tie-breaking [default = %f]\n", pPars->Epsilon );
    Abc_Print( -2, "\t-W float : sets wire delay between adjects LUTs [default = %f]\n", pPars->WireDelay );
    Abc_Print( -2, "\t-S str   : string representing the LUT structure [default = %s]\n", pPars->pLutStruct ? pPars->pLutStruct : "not used" );
    Abc_Print( -2, "\t-q       : toggles preprocessing using several starting points [default = %s]\n", pPars->fPreprocess? "yes": "no" );
    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fArea? "yes": "no" );
    Abc_Print( -2, "\t-r       : enables expansion/reduction of the best cuts [default = %s]\n", pPars->fExpRed? "yes": "no" );
//    Abc_Print( -2, "\t-l       : optimizes latch paths for delay, other paths for area [default = %s]\n", pPars->fLatchPaths? "yes": "no" );
    Abc_Print( -2, "\t-l       : toggle restricting the type of 6-input lookup tables [default = %s]\n", pPars->fLut6Filter? "yes": "no" );
    Abc_Print( -2, "\t-e       : uses edge-based cut selection heuristics [default = %s]\n", pPars->fEdge? "yes": "no" );
    Abc_Print( -2, "\t-p       : uses power-aware cut selection heuristics [default = %s]\n", pPars->fPower? "yes": "no" );
    Abc_Print( -2, "\t-m       : enables cut minimization by removing vacuous variables [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles delay-oriented mapping used with -S <NN> [default = %s]\n", pPars->fDelayOptLut? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggles deriving specialized matching step [default = %s]\n", pPars->fUse34Spec? "yes": "no" );
    Abc_Print( -2, "\t-b       : toggles the use of one special feature [default = %s]\n", pPars->fUseBat? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles delay optimization by SOP balancing [default = %s]\n", pPars->fDelayOpt? "yes": "no" );
    Abc_Print( -2, "\t-x       : toggles delay optimization by DSD balancing [default = %s]\n", pPars->fDsdBalance? "yes": "no" );
    Abc_Print( -2, "\t-y       : toggles delay optimization with recorded library [default = %s]\n", pPars->fUserRecLib? "yes": "no" );
    Abc_Print( -2, "\t-o       : toggles using buffers to decouple combinational outputs [default = %s]\n", pPars->fUseBuffs? "yes": "no" );
    Abc_Print( -2, "\t-f       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck75? "yes": "no" );
    Abc_Print( -2, "\t-u       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck75u? "yes": "no" );
    Abc_Print( -2, "\t-i       : toggles using cofactoring variables [default = %s]\n", pPars->fUseCofVars? "yes": "no" );
//    Abc_Print( -2, "\t-j       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck07? "yes": "no" );
    Abc_Print( -2, "\t-j       : toggles using AND bi-decomposition [default = %s]\n", pPars->fUseAndVars? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles matching based on precomputed DSD manager [default = %s]\n", pPars->fUseDsdTune? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggles deriving LUTs when mapping into LUT structures [default = %s]\n", pPars->fDeriveLuts? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggles optimizing average rather than maximum level [default = %s]\n", pPars->fDoAverage? "yes": "no" );
    Abc_Print( -2, "\t-n       : toggles computing DSDs of the cut functions [default = %s]\n", pPars->fUseDsd? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggles computing truth tables in a new way [default = %s]\n", pPars->fUseTtPerm? "yes": "no" );
    Abc_Print( -2, "\t-h       : toggles rehashing AIG after mapping [default = %s]\n", pPars->fHashMapping? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles printing delay trace [default = %s]\n", pPars->fVerboseTrace? "yes": "no" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Iff( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManIffTest( Gia_Man_t * pGia, If_LibLut_t * pLib, int fVerbose );
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iff(): There is no AIG to map.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iff(): Mapping of the AIG is not defined.\n" );
        return 1;
    }
    if ( pAbc->pLibLut == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iff(): LUT library is not defined.\n" );
        return 1;
    }
    Gia_ManIffTest( pAbc->pGia, (If_LibLut_t *)pAbc->pLibLut, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &iff [-vh]\n" );
    Abc_Print( -2, "\t           performs structural mapping into LUT structures\n" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Iiff( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManIiffTest( char * pFileName, Gia_Man_t * pGia, int nLutSize, int nNumCuts, int fUseGates, int fUseCells, int fUseLuts, int fVerbose );
    char * pFileName = NULL;
    int nLutSize     =  8;
    int nNumCuts     = 12;
    int fUseGates    =  0;
    int fUseCells    =  0;
    int fUseLuts     =  0;
    int c, fVerbose  =  0;
    Gia_Man_t * pNew;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCgclvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nNumCuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'g':
            fUseGates ^= 1;
            break;
        case 'c':
            fUseCells ^= 1;
            break;
        case 'l':
            fUseLuts ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 1 )
        pFileName = argv[globalUtilOptind];
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iiff(): There is no AIG to map.\n" );
        return 1;
    }
    pNew = Gia_ManIiffTest( pFileName, pAbc->pGia, nLutSize, nNumCuts, fUseGates, fUseCells, fUseLuts, fVerbose );
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iiff(): Mapping has failed.\n" );
        return 1;
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    Abc_Print( -2, "usage: &iiff [-KC num] [-gclvh] <file>\n" );
    Abc_Print( -2, "\t           performs techology mapping\n" );
    Abc_Print( -2, "\t-K num   : the maximum LUT size [default = %d]\n",  nLutSize );
    Abc_Print( -2, "\t-C num   : the maximum cut count [default = %d]\n", nNumCuts );
    Abc_Print( -2, "\t-g       : toggle using gates [default = %s]\n",    fUseGates? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggle using cells [default = %s]\n",    fUseCells? "yes": "no" );
    Abc_Print( -2, "\t-l       : toggle using LUTs  [default = %s]\n",    fUseLuts? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\t<file>   : (optional) output file name\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9If2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Mpm_ManCellMapping( Gia_Man_t * p, Mpm_Par_t * pPars, void * pMio );
    extern Gia_Man_t * Mpm_ManLutMapping( Gia_Man_t * p, Mpm_Par_t * pPars );
    char Buffer[200];
    Abc_Ntk_t * pTemp;
    Gia_Man_t * pNew;
    Mpm_Par_t Pars, * pPars = &Pars;
    int c, nLutSize = 6;
    // set defaults
    Mpm_ManSetParsDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCDtmzrcuxvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 2 || nLutSize > 16 )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", nLutSize );
                goto usage;
            }
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nNumCuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNumCuts < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 't':
            pPars->fUseGates ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 'z':
            pPars->fDeriveLuts ^= 1;
            break;
        case 'r':
            pPars->fOneRound ^= 1;
            break;
        case 'c':
            pPars->fMap4Cnf ^= 1;
            break;
        case 'u':
            pPars->fMap4Aig ^= 1;
            break;
        case 'x':
            pPars->fMap4Gates ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }

    if ( pPars->fMap4Cnf )
        pPars->fUseDsd = 1;
    if ( pPars->fCutMin )
        pPars->fUseDsd = 1;
//        pPars->fUseTruth = 1;
    if ( pPars->fMap4Gates )
    {
        pPars->fUseDsd = 1;
        if ( pAbc->pLibScl == NULL )
        {
            Abc_Print( -1, "There is no SCL library available.\n" );
            return 1;
        }
        pPars->pScl = pAbc->pLibScl;
    }
    if ( pPars->fUseDsd || pPars->fUseTruth )
        pPars->fDeriveLuts = 1;
    if ( pPars->fUseDsd && nLutSize != 6 )
    {
        Abc_Print( -1, "Currently DSD can only be used with 6-input cuts.\n" );
        return 1;
    }
    // perform mapping
    assert( pPars->pLib == NULL );
    if ( pPars->fMap4Gates )
    {
        if ( Abc_FrameReadLibGen() == NULL )
        {
            Abc_Print( -1, "There is no GENLIB library available.\n" );
            return 1;
        }
        pPars->pLib = Mpm_LibLutSetSimple( nLutSize );
        pTemp = Mpm_ManCellMapping( pAbc->pGia, pPars, Abc_FrameReadLibGen() );
        Mpm_LibLutFree( pPars->pLib );
        if ( pTemp == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9If2(): Mapping into standard cells has failed.\n" );
            return 1;
        }
        Abc_FrameReplaceCurrentNetwork( pAbc, pTemp );
    }
    else
    {
        pPars->pLib = Mpm_LibLutSetSimple( nLutSize );
        pNew = Mpm_ManLutMapping( pAbc->pGia, pPars );
        Mpm_LibLutFree( pPars->pLib );
        if ( pNew == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9If2(): Mapping into LUTs has failed.\n" );
            return 1;
        }
        Abc_FrameUpdateGia( pAbc, pNew );
    }
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%d", pPars->DelayTarget );
    Abc_Print( -2, "usage: &if2 [-KCD num] [-tmzrcuxvwh]\n" );
    Abc_Print( -2, "\t           performs technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : sets the LUT size for the mapping [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (0 < num < 2^12) [default = %d]\n", pPars->nNumCuts );
    Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-t       : enables using AND/XOR/MUX nodes instead of simple AIG [default = %s]\n", pPars->fUseGates? "yes": "no" );
    Abc_Print( -2, "\t-m       : enables cut minimization by removing vacuous variables [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggles deriving LUTs when mapping into LUT structures [default = %s]\n", pPars->fDeriveLuts? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggles using one round of mapping [default = %s]\n", pPars->fOneRound? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggles mapping for CNF computation [default = %s]\n", pPars->fMap4Cnf? "yes": "no" );
    Abc_Print( -2, "\t-u       : toggles mapping for AIG computation [default = %s]\n", pPars->fMap4Aig? "yes": "no" );
    Abc_Print( -2, "\t-x       : toggles mapping for standard cells [default = %s]\n", pPars->fMap4Gates? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Sif( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManSifPerform( Gia_Man_t * p, int nLutSize, int fEvalOnly, int fVerbose );
    Gia_Man_t * pNew;
    int c, nLutSize = 6, fEvalOnly = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Kevh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 2 || nLutSize > 16 )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", nLutSize );
                goto usage;
            }
            break;
        case 'e':
            fEvalOnly ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    pNew = Gia_ManSifPerform( pAbc->pGia, nLutSize, fEvalOnly, fVerbose );
    if ( pNew != NULL )
        Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    Abc_Print( -2, "usage: &sif [-K num] [-evh]\n" );
    Abc_Print( -2, "\t           performs technology mapping\n" );
    Abc_Print( -2, "\t-K num   : sets the LUT size for the mapping [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-e       : toggles the evaluation mode [default = %s]\n", fEvalOnly? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Jf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[200];
    Jf_Par_t Pars, * pPars = &Pars;
    Gia_Man_t * pNew; int c;
    Jf_ManSetDefaultPars( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCDWaekmdcgvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 2 || pPars->nLutSize > pPars->nLutSizeMax )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", pPars->nLutSize );
                goto usage;
            }
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutNum < 1 || pPars->nCutNum > pPars->nCutNumMax )
            {
                Abc_Print( -1, "This number of cuts (%d) is not supported.\n", pPars->nCutNum );
                goto usage;
            }
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nVerbLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVerbLimit < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fAreaOnly ^= 1;
            break;
        case 'e':
            pPars->fOptEdge ^= 1;
            break;
        case 'k':
            pPars->fCoarsen ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 'd':
            pPars->fFuncDsd ^= 1;
            break;
        case 'c':
            pPars->fGenCnf ^= 1;
            break;
        case 'g':
            pPars->fPureAig ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( Gia_ManBufNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Jf(): This command does not work with barrier buffers.\n" );
        return 1;
    }
    if ( (pPars->fFuncDsd || pPars->fGenCnf) && pPars->nLutSize > 6 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Jf(): DSD computation works for LUT6 or less.\n" );
        return 1;
    }

    if ( (pPars->fFuncDsd || pPars->fGenCnf) && !Sdm_ManCanRead() )
    {
        Abc_Print( -1, "Abc_CommandAbc9Jf(): Cannot input DSD data from file.\n" );
        return 1;
    }

    pNew = Jf_ManPerformMapping( pAbc->pGia, pPars );
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Jf(): Mapping into LUTs has failed.\n" );
        return 1;
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%d", pPars->DelayTarget );
    Abc_Print( -2, "usage: &jf [-KCDW num] [-akmdcgvwh]\n" );
    Abc_Print( -2, "\t           performs technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n", pPars->nLutSizeMax, pPars->nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n", pPars->nCutNumMax, pPars->nCutNum );
    Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-W num   : min frequency when printing functions with \"-w\" [default = %d]\n", pPars->nVerbLimit );
    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fAreaOnly? "yes": "no" );
    Abc_Print( -2, "\t-e       : toggles edge vs node minimization [default = %s]\n", pPars->fOptEdge? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n", pPars->fCoarsen? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles cut minimization [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggles using DSD to represent cut functions [default = %s]\n", pPars->fFuncDsd? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggles mapping for CNF generation [default = %s]\n", pPars->fGenCnf? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles generating AIG without mapping [default = %s]\n", pPars->fPureAig? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Kf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Kf_ManSetDefaultPars( Jf_Par_t * pPars );
    extern Gia_Man_t * Kf_ManPerformMapping( Gia_Man_t * pGia, Jf_Par_t * pPars );
    char Buffer[200];
    Jf_Par_t Pars, * pPars = &Pars;
    Gia_Man_t * pNew; int c;
    Kf_ManSetDefaultPars( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCPDWaekmdcgtsvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 2 || pPars->nLutSize > pPars->nLutSizeMax )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", pPars->nLutSize );
                goto usage;
            }
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutNum < 1 || pPars->nCutNum > pPars->nCutNumMax )
            {
                Abc_Print( -1, "This number of cuts (%d) is not supported.\n", pPars->nCutNum );
                goto usage;
            }
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nProcNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nProcNum < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nVerbLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVerbLimit < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fAreaOnly ^= 1;
            break;
        case 'e':
            pPars->fOptEdge ^= 1;
            break;
        case 'k':
            pPars->fCoarsen ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 'd':
            pPars->fFuncDsd ^= 1;
            break;
        case 'c':
            pPars->fGenCnf ^= 1;
            break;
        case 'g':
            pPars->fPureAig ^= 1;
            break;
        case 't':
            pPars->fCutHashing ^= 1;
            break;
        case 's':
            pPars->fCutSimple ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }

    pNew = Kf_ManPerformMapping( pAbc->pGia, pPars );
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Kf(): Mapping into LUTs has failed.\n" );
        return 1;
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%d", pPars->DelayTarget );
    Abc_Print( -2, "usage: &kf [-KCPDW num] [-akmdcgtsvwh]\n" );
    Abc_Print( -2, "\t           performs technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n", pPars->nLutSizeMax, pPars->nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n", pPars->nCutNumMax, pPars->nCutNum );
    Abc_Print( -2, "\t-P num   : the number of cut computation processes (0 <= P <= %d) [default = %d]\n", pPars->nProcNumMax, pPars->nProcNum );
    Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-W num   : min frequency when printing functions with \"-w\" [default = %d]\n", pPars->nVerbLimit );
    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fAreaOnly? "yes": "no" );
    Abc_Print( -2, "\t-e       : toggles edge vs node minimization [default = %s]\n", pPars->fOptEdge? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n", pPars->fCoarsen? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles cut minimization [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggles using DSD to represent cut functions [default = %s]\n", pPars->fFuncDsd? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggles mapping for CNF generation [default = %s]\n", pPars->fGenCnf? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles generating AIG without mapping [default = %s]\n", pPars->fPureAig? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggles cut computation using hash table [default = %s]\n", pPars->fCutHashing? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles cut computation using a simple method [default = %s]\n", pPars->fCutSimple? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Lf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[200];
    Jf_Par_t Pars, * pPars = &Pars;
    Gia_Man_t * pNew; int c;
    Lf_ManSetDefaultPars( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCFARLEDWMekmupstgvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 2 || pPars->nLutSize > pPars->nLutSizeMax )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", pPars->nLutSize );
                goto usage;
            }
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutNum < 1 || pPars->nCutNum > pPars->nCutNumMax )
            {
                Abc_Print( -1, "This number of cuts (%d) is not supported.\n", pPars->nCutNum );
                goto usage;
            }
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRoundsEla = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRoundsEla < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRelaxRatio < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nCoarseLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCoarseLimit < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-E\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nAreaTuner = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAreaTuner < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nVerbLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVerbLimit < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSizeMux = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSizeMux < 2 || pPars->nLutSizeMux > pPars->nLutSizeMax )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", pPars->nLutSizeMux );
                goto usage;
            }
            break;
        case 'a':
            pPars->fAreaOnly ^= 1;
            break;
        case 'e':
            pPars->fOptEdge ^= 1;
            break;
        case 'k':
            pPars->fCoarsen ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 'u':
            pPars->fUseMux7 ^= 1;
            break;
        case 'p':
            pPars->fPower ^= 1;
            break;
        case 's':
            pPars->fPureAig ^= 1;
            break;
        case 't':
            pPars->fDoAverage ^= 1;
            break;
        case 'g':
            pPars->fCutGroup ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Current AIG has mapping. Run \"&st\".\n" );
        return 1;
    }
    if ( pPars->nLutSizeMux && pPars->fUseMux7 )
    {
        Abc_Print( -1, "Flags \"-M\" and \"-u\" are incompatible.\n" );
        return 1;
    }
    if ( pPars->fCutGroup )
    {
        if ( pPars->nLutSize < 4 || pPars->nLutSize > 6 )
        {
            Abc_Print( -1, "This feature works only for LUT size equal to 4, 5, and 6.\n" );
            return 1;
        }
        printf( "Using cut grouping for %d-LUTs. Considering cuts up to %d.\n", pPars->nLutSize, 2*pPars->nLutSize + 1 );
        pPars->nLutSize = 2*pPars->nLutSize + 1;
    }
    pNew = Lf_ManPerformMapping( pAbc->pGia, pPars );
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Lf(): Mapping into LUTs has failed.\n" );
        return 1;
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%d", pPars->DelayTarget );
    Abc_Print( -2, "usage: &lf [-KCFARLEDM num] [-kmupstgvwh]\n" );
    Abc_Print( -2, "\t           performs technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n", pPars->nLutSizeMax, pPars->nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n", pPars->nCutNumMax, pPars->nCutNum );
    Abc_Print( -2, "\t-F num   : the number of area flow rounds [default = %d]\n", pPars->nRounds );
    Abc_Print( -2, "\t-A num   : the number of exact area rounds [default = %d]\n", pPars->nRoundsEla );
    Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n", pPars->nRelaxRatio );
    Abc_Print( -2, "\t-L num   : the fanout limit for coarsening XOR/MUX (num >= 2) [default = %d]\n", pPars->nCoarseLimit );
    Abc_Print( -2, "\t-E num   : the area/edge tradeoff parameter (0 <= num <= 100) [default = %d]\n", pPars->nAreaTuner );
    Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-M num   : LUT size when cofactoring is performed (0 <= num <= 100) [default = %d]\n", pPars->nLutSizeMux );
//    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fAreaOnly? "yes": "no" );
    Abc_Print( -2, "\t-e       : toggles edge vs node minimization [default = %s]\n", pPars->fOptEdge? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n", pPars->fCoarsen? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles cut minimization [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-u       : toggles using additional MUXes [default = %s]\n", pPars->fUseMux7? "yes": "no" );
    Abc_Print( -2, "\t-p       : toggles power-aware cut selection heuristics [default = %s]\n", pPars->fPower? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles generating AIG without mapping [default = %s]\n", pPars->fPureAig? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggles optimizing average rather than maximum level [default = %s]\n", pPars->fDoAverage? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles using cut splitting [default = %s]\n", pPars->fCutGroup? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Mf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    char Buffer[200];
    Jf_Par_t Pars, * pPars = &Pars;
    Gia_Man_t * pNew; int c;
    Mf_ManSetDefaultPars( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCFARLEDWaekmclgvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 2 || pPars->nLutSize > pPars->nLutSizeMax )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", pPars->nLutSize );
                goto usage;
            }
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutNum < 1 || pPars->nCutNum > pPars->nCutNumMax )
            {
                Abc_Print( -1, "This number of cuts (%d) is not supported.\n", pPars->nCutNum );
                goto usage;
            }
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRoundsEla = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRoundsEla < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRelaxRatio < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nCoarseLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCoarseLimit < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-E\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nAreaTuner = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAreaTuner < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nVerbLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVerbLimit < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fAreaOnly ^= 1;
            break;
        case 'e':
            pPars->fOptEdge ^= 1;
            break;
        case 'k':
            pPars->fCoarsen ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 'c':
            pPars->fGenCnf ^= 1;
            break;
        case 'l':
            pPars->fGenLit ^= 1;
            break;
        case 'g':
            pPars->fPureAig ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }

    pNew = Mf_ManPerformMapping( pAbc->pGia, pPars );
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Lf(): Mapping into LUTs has failed.\n" );
        return 1;
    }
    if ( pPars->fGenCnf )
        Cnf_DataFree( (Cnf_Dat_t*)pAbc->pGia->pData ), pAbc->pGia->pData = NULL;
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%d", pPars->DelayTarget );
    Abc_Print( -2, "usage: &mf [-KCFARLED num] [-akmcgvwh]\n" );
    Abc_Print( -2, "\t           performs technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n", pPars->nLutSizeMax, pPars->nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n", pPars->nCutNumMax, pPars->nCutNum );
    Abc_Print( -2, "\t-F num   : the number of area flow rounds [default = %d]\n", pPars->nRounds );
    Abc_Print( -2, "\t-A num   : the number of exact area rounds [default = %d]\n", pPars->nRoundsEla );
    Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n", pPars->nRelaxRatio );
    Abc_Print( -2, "\t-L num   : the fanout limit for coarsening XOR/MUX (num >= 2) [default = %d]\n", pPars->nCoarseLimit );
    Abc_Print( -2, "\t-E num   : the area/edge tradeoff parameter (0 <= num <= 100) [default = %d]\n", pPars->nAreaTuner );
    Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fAreaOnly? "yes": "no" );
    Abc_Print( -2, "\t-e       : toggles edge vs node minimization [default = %s]\n", pPars->fOptEdge? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n", pPars->fCoarsen? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles cut minimization [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggles mapping for CNF generation [default = %s]\n", pPars->fGenCnf? "yes": "no" );
    Abc_Print( -2, "\t-l       : toggles mapping for literals [default = %s]\n", pPars->fGenLit? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles generating AIG without mapping [default = %s]\n", pPars->fPureAig? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Nf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Nf_ManSetDefaultPars( Jf_Par_t * pPars );
    extern Gia_Man_t * Nf_ManPerformMapping( Gia_Man_t * pGia, Jf_Par_t * pPars );
    extern Gia_Man_t * Pf_ManPerformMapping( Gia_Man_t * pGia, Jf_Par_t * pPars );
    char Buffer[200];
    Jf_Par_t Pars, * pPars = &Pars;
    Gia_Man_t * pNew; int c;
    Nf_ManSetDefaultPars( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCFARLEDQWakpqfvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 2 || pPars->nLutSize > pPars->nLutSizeMax )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", pPars->nLutSize );
                goto usage;
            }
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutNum < 1 || pPars->nCutNum > pPars->nCutNumMax )
            {
                Abc_Print( -1, "This number of cuts (%d) is not supported.\n", pPars->nCutNum );
                goto usage;
            }
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRoundsEla = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRoundsEla < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by an integer number.\n" );
                return 0;
            }
            pPars->nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRelaxRatio < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by an integer number.\n" );
                return 0;
            }
            pPars->nCoarseLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCoarseLimit < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-E\" should be followed by an integer number.\n" );
                return 0;
            }
            pPars->nAreaTuner = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAreaTuner < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer number.\n" );
                goto usage;
            }
            pPars->DelayTarget = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer number.\n" );
                goto usage;
            }
            pPars->nReqTimeFlex = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nReqTimeFlex < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nVerbLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nVerbLimit < 0 )
                goto usage;
            break;
        case 'a':
            pPars->fAreaOnly ^= 1;
            break;
        case 'k':
            pPars->fCoarsen ^= 1;
            break;
        case 'p':
            pPars->fPinPerm ^= 1;
            break;
        case 'q':
            pPars->fPinQuick ^= 1;
            break;
        case 'f':
            pPars->fPinFilter ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( Abc_FrameReadLibGen() == NULL )
    {
        Abc_Print( -1, "Current library is not available.\n" );
        return 1;
    }
//    if ( pPars->fAreaOnly )
//        pNew = Pf_ManPerformMapping( pAbc->pGia, pPars );
//    else
        pNew = Nf_ManPerformMapping( pAbc->pGia, pPars );
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Nf(): Mapping into LUTs has failed.\n" );
        return 1;
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%d", pPars->DelayTarget );
    Abc_Print( -2, "usage: &nf [-KCFARLEDQ num] [-akpqfvwh]\n" );
    Abc_Print( -2, "\t           performs technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n",                  pPars->nLutSizeMax, pPars->nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n",           pPars->nCutNumMax, pPars->nCutNum );
    Abc_Print( -2, "\t-F num   : the number of area flow rounds [default = %d]\n",                           pPars->nRounds );
    Abc_Print( -2, "\t-A num   : the number of exact area rounds (when \'-a\' is used) [default = %d]\n",    pPars->nRoundsEla );
    Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n",                    pPars->nRelaxRatio );
    Abc_Print( -2, "\t-L num   : the fanout limit for coarsening XOR/MUX (num >= 2) [default = %d]\n",       pPars->nCoarseLimit );
    Abc_Print( -2, "\t-E num   : the area/edge tradeoff parameter (0 <= num <= 100) [default = %d]\n",       pPars->nAreaTuner );
    Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n",                Buffer );
    Abc_Print( -2, "\t-Q num   : internal parameter impacting area of the mapping [default = %d]\n",         pPars->nReqTimeFlex );
    Abc_Print( -2, "\t-a       : toggles SAT-based area-oriented mapping (experimental) [default = %s]\n",   pPars->fAreaOnly? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n",                     pPars->fCoarsen? "yes": "no" );
    Abc_Print( -2, "\t-p       : toggles pin permutation (more matches - better quality) [default = %s]\n",  pPars->fPinPerm? "yes": "no" );
    Abc_Print( -2, "\t-q       : toggles quick mapping (fewer matches - worse quality) [default = %s]\n",    pPars->fPinQuick? "yes": "no" );
    Abc_Print( -2, "\t-f       : toggles filtering matches (useful with unit delay model) [default = %s]\n", pPars->fPinFilter? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n",                                   pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n",                              pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Of( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Of_ManSetDefaultPars( Jf_Par_t * pPars );
    extern Gia_Man_t * Of_ManPerformMapping( Gia_Man_t * pGia, Jf_Par_t * pPars );
    char Buffer[200];
    Jf_Par_t Pars, * pPars = &Pars;
    Gia_Man_t * pNew; int c;
    Of_ManSetDefaultPars( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KCFARLEDNMQekmpgtvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 2 || pPars->nLutSize > pPars->nLutSizeMax )
            {
                Abc_Print( -1, "LUT size %d is not supported.\n", pPars->nLutSize );
                goto usage;
            }
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutNum < 1 || pPars->nCutNum > pPars->nCutNumMax )
            {
                Abc_Print( -1, "This number of cuts (%d) is not supported.\n", pPars->nCutNum );
                goto usage;
            }
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRounds < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nRoundsEla = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRoundsEla < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nRelaxRatio = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRelaxRatio < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-R\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nCoarseLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCoarseLimit < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( 1, "Command line switch \"-E\" should be followed by a floating point number.\n" );
                return 0;
            }
            pPars->nAreaTuner = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nAreaTuner < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a floating point number.\n" );
                goto usage;
            }
            pPars->DelayTarget = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->DelayTarget <= 0.0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nDelayLut1 = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDelayLut1 < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nDelayLut2 = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDelayLut2 < 0 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by a positive integer.\n" );
                goto usage;
            }
            pPars->nFastEdges = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFastEdges < 0 )
                goto usage;
            break;
        case 'e':
            pPars->fOptEdge ^= 1;
            break;
        case 'k':
            pPars->fCoarsen ^= 1;
            break;
        case 'm':
            pPars->fCutMin ^= 1;
            break;
        case 'p':
            pPars->fPower ^= 1;
            break;
        case 'g':
            pPars->fPureAig ^= 1;
            break;
        case 't':
            pPars->fDoAverage ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Current AIG has mapping. Run \"&st\".\n" );
        return 1;
    }

    pNew = Of_ManPerformMapping( pAbc->pGia, pPars );
    if ( pNew == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Of(): Mapping into LUTs has failed.\n" );
        return 1;
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    if ( pPars->DelayTarget == -1 )
        sprintf(Buffer, "best possible" );
    else
        sprintf(Buffer, "%d", pPars->DelayTarget );
    Abc_Print( -2, "usage: &of [-KCFARLEDNMQ num] [-kmpgtvwh]\n" );
    Abc_Print( -2, "\t           performs technology mapping of the network\n" );
    Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n", pPars->nLutSizeMax, pPars->nLutSize );
    Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n", pPars->nCutNumMax, pPars->nCutNum );
    Abc_Print( -2, "\t-F num   : the number of area flow rounds [default = %d]\n", pPars->nRounds );
    Abc_Print( -2, "\t-A num   : the number of exact area rounds [default = %d]\n", pPars->nRoundsEla );
    Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n", pPars->nRelaxRatio );
    Abc_Print( -2, "\t-L num   : the fanout limit for coarsening XOR/MUX (num >= 2) [default = %d]\n", pPars->nCoarseLimit );
    Abc_Print( -2, "\t-E num   : the area/edge tradeoff parameter (0 <= num <= 100) [default = %d]\n", pPars->nAreaTuner );
    Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n", Buffer );
    Abc_Print( -2, "\t-N num   : delay of the first LUT [default = %d]\n", pPars->nDelayLut1 );
    Abc_Print( -2, "\t-M num   : delay of the second LUT [default = %d]\n", pPars->nDelayLut2 );
    Abc_Print( -2, "\t-Q num   : the number of fast non-routable edges [default = %d]\n", pPars->nFastEdges );
    Abc_Print( -2, "\t-e       : toggles edge vs node minimization [default = %s]\n", pPars->fOptEdge? "yes": "no" );
    Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n", pPars->fCoarsen? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles cut minimization [default = %s]\n", pPars->fCutMin? "yes": "no" );
    Abc_Print( -2, "\t-p       : toggles power-aware cut selection heuristics [default = %s]\n", pPars->fPower? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles generating AIG without mapping [default = %s]\n", pPars->fPureAig? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggles optimizing average rather than maximum level [default = %s]\n", pPars->fDoAverage? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Pack( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManLutPacking( Gia_Man_t * p, int nBlock, int DelayRoute, int DelayDir, int fVerbose );
    int c, nBlock = 2, DelayRoute = 10, DelayDir = 2, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NRDvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nBlock = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBlock < 2 )
            {
                Abc_Print( -1, "LUT block size (%d) should be more than 1.\n", nBlock );
                goto usage;
            }
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                goto usage;
            }
            DelayRoute = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( DelayRoute <= 0 )
            {
                Abc_Print( -1, "Rounting delay (%d) should be more than 0.\n", DelayRoute);
                goto usage;
            }
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a positive integer.\n" );
                goto usage;
            }
            DelayDir = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( DelayDir <= 0 )
            {
                Abc_Print( -1, "Direct delay (%d) should be more than 0.\n", DelayRoute);
                goto usage;
            }
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Current AIG has no mapping. Run \"&if\".\n" );
        return 1;
    }
    if ( Gia_ManLutSizeMax(pAbc->pGia) > 6 )
        Abc_Print( 0, "Current AIG has mapping into %d-LUTs.\n", Gia_ManLutSizeMax(pAbc->pGia) );
    else
        Gia_ManLutPacking( pAbc->pGia, nBlock, DelayRoute, DelayDir, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &pack [-NRD num] [-vh]\n" );
    Abc_Print( -2, "\t           performs packing for the LUT mapped network\n" );
    Abc_Print( -2, "\t-N num   : the number of LUTs in the block [default = %d]\n", nBlock );
    Abc_Print( -2, "\t-R num   : the routable delay of a LUT [default = %d]\n", DelayRoute );
    Abc_Print( -2, "\t-D num   : the direct (non-routable) delay of a LUT [default = %d]\n", DelayDir );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Edge( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Edg_ManAssignEdgeNew( Gia_Man_t * p, int nEdges, int fVerbose );
    extern void Seg_ManComputeDelay( Gia_Man_t * pGia, int Delay, int nFanouts, int fTwo, int fVerbose );
    extern void Sle_ManExplore( Gia_Man_t * pGia, int nBTLimit, int DelayInit, int fDynamic, int fTwoEdges, int fVerbose );

    int c, nBTLimit = 0, DelayMax = 0, nFanouts = 0, nEdges = 1, fReverse = 0, fUsePack = 0, fUseOld = 0, fMapping = 0, fDynamic = 1, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CDFErpomdvh" ) ) != EOF )
    {
        switch ( c )
        {
            case 'C':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                    goto usage;
                }
                nBTLimit = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                break;
            case 'D':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-D\" should be followed by a positive integer.\n" );
                    goto usage;
                }
                DelayMax = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                break;
            case 'F':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-F\" should be followed by a positive integer.\n" );
                    goto usage;
                }
                nFanouts = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                break;
            case 'E':
                if ( globalUtilOptind >= argc )
                {
                    Abc_Print( -1, "Command line switch \"-E\" should be followed by a positive integer.\n" );
                    goto usage;
                }
                nEdges = atoi(argv[globalUtilOptind]);
                globalUtilOptind++;
                if ( nEdges != 1 && nEdges != 2 )
                {
                    Abc_Print( -1, "Edge limit (%d) should be 1 or 2.\n", nEdges );
                    goto usage;
                }
                break;
            case 'r':
                fReverse ^= 1;
                break;
            case 'p':
                fUsePack ^= 1;
                break;
            case 'o':
                fUseOld ^= 1;
                break;
            case 'm':
                fMapping ^= 1;
                break;
            case 'd':
                fDynamic ^= 1;
                break;
            case 'v':
                fVerbose ^= 1;
                break;
            case 'h':
            default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( fMapping )
    {
        Sle_ManExplore( pAbc->pGia, nBTLimit, DelayMax, fDynamic, nEdges==2, fVerbose );
        return 0;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Current AIG has no mapping. Run \"&if\".\n" );
        return 1;
    }
    if ( Gia_ManLutSizeMax(pAbc->pGia) > 6 )
    {
        Abc_Print( 0, "Current AIG has mapping into %d-LUTs.\n", Gia_ManLutSizeMax(pAbc->pGia) );
        return 0;
    }
    if ( fUsePack )
    {
        if ( pAbc->pGia->vPacking == NULL )
        {
            Abc_Print( -1, "Packing information is not present.\n" );
            return 0;
        }
        Gia_ManConvertPackingToEdges( pAbc->pGia );
        return 0;
    }
    if ( !fUseOld )
    {
        //Edg_ManAssignEdgeNew( pAbc->pGia, nEdges, fVerbose );
        Seg_ManComputeDelay( pAbc->pGia, DelayMax, nFanouts, nEdges==2, fVerbose );
        return 0;
    }
    if ( pAbc->pGia->pManTime && fReverse )
    {
        Abc_Print( 0, "Reverse computation does not work when boxes are present.\n" );
        return 0;
    }
    if ( fReverse )
        DelayMax = Gia_ManComputeEdgeDelay2( pAbc->pGia );
    else
        DelayMax = Gia_ManComputeEdgeDelay( pAbc->pGia, nEdges == 2 );
    //printf( "The number of edges = %d.  Delay = %d.\n", Gia_ManEvalEdgeCount(pAbc->pGia), DelayMax );
    return 0;

usage:
    Abc_Print( -2, "usage: &edge [-CDFE num] [-rpomdvh]\n" );
    Abc_Print( -2, "\t           find edge assignment of the LUT-mapped network\n" );
    Abc_Print( -2, "\t-C num   : the SAT solver conflict limit (0 = unused) [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-D num   : the upper bound on delay [default = %d]\n", DelayMax );
    Abc_Print( -2, "\t-F num   : skip using edge if fanout higher than this [default = %d]\n", nFanouts );
    Abc_Print( -2, "\t-E num   : the limit on the number of edges (1 <= num <= 2) [default = %d]\n", nEdges );
    Abc_Print( -2, "\t-r       : toggles using reverse order [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-p       : toggles deriving edges from packing [default = %s]\n", fUsePack? "yes": "no" );
    Abc_Print( -2, "\t-o       : toggles using old algorithm [default = %s]\n", fUseOld? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles combining edge assignment with mapping [default = %s]\n", fMapping? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggles dynamic addition of clauses [default = %s]\n", fDynamic? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SatLut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManLutSat( Gia_Man_t * p, int LutSize, int nNumber, int nImproves, int nBTLimit, int DelayMax, int nEdges, int fDelay, int fReverse, int fVerbose, int fVeryVerbose );
    int c, LutSize = 0, nNumber = 32, nImproves = 0, nBTLimit = 100, DelayMax = 0, nEdges = 0;
    int fDelay = 0, fReverse = 0, fVeryVerbose = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NICDQdrwvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nNumber = atoi(argv[globalUtilOptind]);
            if ( nNumber > 128 )
            {
                Abc_Print( -1, "The number of AIG nodes should not exceed 128.\n" );
                goto usage;
            }
            globalUtilOptind++;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nImproves = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by a positive integer.\n" );
                goto usage;
            }
            DelayMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nEdges = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'd':
            fDelay ^= 1;
            break;
        case 'r':
            fReverse ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }

    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Current AIG has no mapping. Run \"&if\".\n" );
        return 1;
    }
    LutSize = Gia_ManLutSizeMax(pAbc->pGia);
    if ( LutSize > 6 )
        Abc_Print( 0, "Current AIG is mapped into %d-LUTs (only 6-LUT mapping is currently supported).\n", Gia_ManLutSizeMax(pAbc->pGia) );
    else
        Gia_ManLutSat( pAbc->pGia, LutSize, nNumber, nImproves, nBTLimit, DelayMax, nEdges, fDelay, fReverse, fVerbose, fVeryVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &satlut [-NICDQ num] [-drwvh]\n" );
    Abc_Print( -2, "\t           performs SAT-based remapping of the LUT-mapped network\n" );
    Abc_Print( -2, "\t-N num   : the limit on AIG nodes in the window (num <= 128) [default = %d]\n", nNumber );
    Abc_Print( -2, "\t-I num   : the limit on the number of improved windows [default = %d]\n", nImproves );
    Abc_Print( -2, "\t-C num   : the limit on the number of conflicts [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-D num   : the user-specified required times at the outputs [default = %d]\n", DelayMax );
    Abc_Print( -2, "\t-Q num   : the maximum number of edges [default = %d]\n", nEdges );
    Abc_Print( -2, "\t-d       : toggles delay optimization [default = %s]\n", fDelay? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggles using reverse search [default = %s]\n", fReverse? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9LNetRead( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Vec_WrdReadTest( char * pFileName );
    extern void Gia_ManReadSimInfoInputs( char * pFileName, char * pFileOut1, int fVerbose );
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( argc == globalUtilOptind + 2 ) // read 1 file, write 1 file
    {
        Gia_ManReadSimInfoInputs( argv[globalUtilOptind], argv[globalUtilOptind+1], fVerbose );
        return 0;
    }
    if ( strstr(argv[globalUtilOptind], ".v") )
    {
        Gia_Man_t * pNew = Vec_WrdReadTest( argv[globalUtilOptind] );
        if ( pNew == NULL )
        {
            printf( "Cannot read network from file \"%s\".\n", argv[globalUtilOptind] );
            return 0;
        }
        Abc_FrameUpdateGia( pAbc, pNew );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &lnetread [-vh] <file> <file2>\n" );
    Abc_Print( -2, "\t           reads and converts the network or the simulation data\n" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    Abc_Print( -2, "\t<file>   : input file name with simulation information\n");
    Abc_Print( -2, "\t<file2>  : output file name with simulation information\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9LNetSim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManSimInfoPassTest( Gia_Man_t * p, char * pFileName, char * pFileName2, int fVerbose );
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( argc != globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Expecting two file names on the command line.\n" );
        return 1;
    }
    Gia_ManSimInfoPassTest( pAbc->pGia, argv[globalUtilOptind], argv[globalUtilOptind+1], fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &lnetsim [-vh] <file> <file2>\n" );
    Abc_Print( -2, "\t           performs specialized AIG simulation\n" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    Abc_Print( -2, "\t<file>   : input file name with simulation information\n");
    Abc_Print( -2, "\t<file2>  : output file name with simulation information\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9LNetEval( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManSimInfoEval( Gia_Man_t * p, char * pFileName, char * pFileName2, int nOuts, int fVerbose );
    int c, nOuts = -1, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Ovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nOuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( argc != globalUtilOptind + 2 )
    {
        Abc_Print( -1, "Expecting two file names on the command line.\n" );
        return 1;
    }
    Gia_ManSimInfoEval( pAbc->pGia, argv[globalUtilOptind], argv[globalUtilOptind+1], nOuts, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &lneteval [-O num] [-vh] <file> <file2>\n" );
    Abc_Print( -2, "\t           performs testing of the AIG on the simulation data\n" );
    Abc_Print( -2, "\t-O num   : the output group size [default = %d]\n",  nOuts );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    Abc_Print( -2, "\t<file>   : file name with simulation information\n");
    Abc_Print( -2, "\t<file2>  : file name with simulation information\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9LNetOpt( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManPerformLNetOpt( Gia_Man_t * p, int fTryNew, char * pFileName, int nIns, int nOuts, int Thresh, int nRounds, int fVerbose );
    extern Gia_Man_t * Gia_ManPerformLNetOptNew( Gia_Man_t * p, char * pFileName, int nIns, int nOuts, int Thresh, int nRounds, int fVerbose );
    Gia_Man_t * pTemp;
    char * pFileName = NULL;
    int c, nIns = 6, nOuts = 2, Limit = 0, nRounds = 20, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IORXvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nIns = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nOuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by a positive integer.\n" );
                goto usage;
            }
            Limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( argc > globalUtilOptind + 1 )
    {
        return 0;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( argc == globalUtilOptind + 1 )
    {
        FILE * pFile = fopen( argv[globalUtilOptind], "rb" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9BCore(): Cannot open file \"%s\" for reading the simulation information.\n", argv[globalUtilOptind] );
            return 0;
        }
        fclose( pFile );
        pFileName = argv[globalUtilOptind];
    }
    pTemp = Gia_ManPerformLNetOptNew( pAbc->pGia, pFileName, nIns, nOuts, Limit, nRounds, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &lnetopt [-IORX num] [-vh] <file>\n" );
    Abc_Print( -2, "\t           performs specialized AIG optimization\n" );
    Abc_Print( -2, "\t-I num   : the input support size [default = %d]\n",                 nIns );
    Abc_Print( -2, "\t-O num   : the output group size [default = %d]\n",                  nOuts );
    Abc_Print( -2, "\t-R num   : patterns are cares starting this value [default = %d]\n", Limit );
    Abc_Print( -2, "\t-X num   : the number of optimization rounds [default = %d]\n",      nRounds );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n",                 fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    Abc_Print( -2, "\t<file>   : file name with simulation information\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Ttopt( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    char * pFileName = NULL;
    int c, nIns = 6, nOuts = 2, Limit = 0, nRounds = 20, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IORXvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nIns = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nOuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by a positive integer.\n" );
                goto usage;
            }
            Limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nRounds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( argc > globalUtilOptind + 1 )
    {
        return 0;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( argc == globalUtilOptind + 1 )
    {
        FILE * pFile = fopen( argv[globalUtilOptind], "rb" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9BCore(): Cannot open file \"%s\" for reading the simulation information.\n", argv[globalUtilOptind] );
            return 0;
        }
        fclose( pFile );
        pFileName = argv[globalUtilOptind];
    }
    if ( pFileName )
        pTemp = Gia_ManTtoptCare( pAbc->pGia, nIns, nOuts, nRounds, pFileName, Limit );
    else
        pTemp = Gia_ManTtopt( pAbc->pGia, nIns, nOuts, nRounds );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &ttopt [-IORX num] [-vh] <file>\n" );
    Abc_Print( -2, "\t           performs specialized AIG optimization\n" );
    Abc_Print( -2, "\t-I num   : the input support size [default = %d]\n",                 nIns );
    Abc_Print( -2, "\t-O num   : the output group size [default = %d]\n",                  nOuts );
    Abc_Print( -2, "\t-R num   : patterns are cares starting this value [default = %d]\n", Limit );
    Abc_Print( -2, "\t-X num   : the number of optimization rounds [default = %d]\n",      nRounds );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n",                 fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    Abc_Print( -2, "\t<file>   : file name with simulation information\n");
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t           This command was contributed by Yukio Miyasaka.\n" );
    Abc_Print( -2, "\t           The paper describing the method: Y. Miyasaka et al. \"Synthesizing\n" );
    Abc_Print( -2, "\t           a class of practical Boolean functions using truth tables\". Proc. IWLS 2022.\n" );
    Abc_Print( -2, "\t           https://people.eecs.berkeley.edu/~alanmi/publications/2022/iwls22_reo.pdf\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Transduction( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp, * pExdc = NULL;
    int c, nType = 1, fMspf = 0, nRandom = 0, nSortType = 0, nPiShuffle = 0, nParameter = 0, fLevel = 0, fTruth = 0, fNewLine = 0, nVerbose = 2;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "TSIPRVtmnlh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nRandom = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nSortType = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nPiShuffle = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nParameter = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nVerbose = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 't':
            fTruth ^= 1;
            break;
        case 'm':
            fMspf ^= 1;
            break;
        case 'n':
            fNewLine ^= 1;
            break;
        case 'l':
            fLevel ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( argc == globalUtilOptind + 1 )
    {
        FILE * pFile = fopen( argv[globalUtilOptind], "rb" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Cannot open input file \"%s\". ", argv[globalUtilOptind] );
            return 1;
        }
        fclose( pFile );
        pExdc = Gia_AigerRead( argv[globalUtilOptind], 0, 0, 0 );
        if ( pExdc == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 1;
        }
    }

    if ( fLevel && (nType == 3 || nType == 8) )
    {
        Abc_Print( -1, "Level preserving optimization does not work with transduction type 3 and 8.\n" );
        return 1;
    }

    if ( fTruth )
        pTemp = Gia_ManTransductionTt( pAbc->pGia, nType, fMspf, nRandom, nSortType, nPiShuffle, nParameter, fLevel, pExdc, fNewLine, nVerbose );
    else
        pTemp = Gia_ManTransductionBdd( pAbc->pGia, nType, fMspf, nRandom, nSortType, nPiShuffle, nParameter, fLevel, pExdc, fNewLine, nVerbose );
    if ( pExdc != NULL )
        Gia_ManStop( pExdc );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &transduction [-TSIPRV num] [-bmlh] <file>\n" );
    Abc_Print( -2, "\t           performs transduction-based AIG optimization\n" );
    Abc_Print( -2, "\t-T num   : transduction type [default = %d]\n", nType );
    Abc_Print( -2, "\t                0: remove simply redundant nodes\n" );
    Abc_Print( -2, "\t                1: Resub\n" );
    Abc_Print( -2, "\t                2: ResubMono\n" );
    Abc_Print( -2, "\t                3: ResubShared\n" );
    Abc_Print( -2, "\t                4: repeat Resub\n" );
    Abc_Print( -2, "\t                5: repeat ResubMono\n" );
    Abc_Print( -2, "\t                6: script RepeatInner\n" );
    Abc_Print( -2, "\t                7: script RepeatOuter\n" );
    Abc_Print( -2, "\t                8: script RepeatAll\n" );
    Abc_Print( -2, "\t-S num   : fanin sort type [default = %d]\n", nSortType );
    Abc_Print( -2, "\t                0: topological order\n" );
    Abc_Print( -2, "\t                1: number of ones\n" );
    Abc_Print( -2, "\t                2: number of ones before complemented edges\n" );
    Abc_Print( -2, "\t                3: pseudo random\n" );
    Abc_Print( -2, "\t                4: no sorting\n" );
    Abc_Print( -2, "\t-I num   : random seed to shuffle PIs (0 = no shuffle) [default = %d]\n", nPiShuffle );
    Abc_Print( -2, "\t-P num   : parameters for scripts [default = %d]\n", nParameter );
    Abc_Print( -2, "\t-R num   : random seed to set all parameters (0 = no random) ([default = %d]\n", nRandom );
    Abc_Print( -2, "\t-V num   : verbosity level [default = %d]\n", nVerbose );
    Abc_Print( -2, "\t-t       : toggles using truth table instead of BDD [default = %s]\n", fTruth? "yes": "no" );
    Abc_Print( -2, "\t-m       : toggles using MSPF instead of CSPF [default = %s]\n", fMspf? "yes": "no" );
    Abc_Print( -2, "\t-n       : toggles printing with a new line [default = %s]\n", fNewLine? "yes": "no" );
    Abc_Print( -2, "\t-l       : toggles level preserving optimization [default = %s]\n", fLevel? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n" );
    Abc_Print( -2, "\t<file>   : AIGER specifying external don't-cares\n" );
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t           This command was contributed by Yukio Miyasaka.\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9TranStoch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManTranStoch( Gia_Man_t * pGia, int nRestarts, int nHops, int nSeedBase, int fMspf, int fMerge, int fResetHop, int fZeroCostHop, int fRefactor, int fTruth, int fSingle, int fOriginalOnly, int fNewLine, Gia_Man_t * pExdc, int nThreads, int nVerbose );
    Gia_Man_t * pTemp, * pExdc = NULL;
    int c, nRestarts = 0, nHops = 10, nSeedBase = 0, fMspf = 1, fMerge = 1, fResetHop = 1, fZeroCostHop = 0, fRefactor = 0, fTruth = 0, fSingle = 0, fOriginalOnly = 0, fNewLine = 0, nThreads = 1, nVerbose = 1;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NMRPVmgrzftsonh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nRestarts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nHops = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nSeedBase = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nThreads = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nVerbose = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'm':
            fMspf ^= 1;
            break;
        case 'g':
            fMerge ^= 1;
            break;
        case 'r':
            fResetHop ^= 1;
            break;
        case 'z':
            fZeroCostHop ^= 1;
            break;
        case 'f':
            fRefactor ^= 1;
            break;
        case 't':
            fTruth ^= 1;
            break;
        case 's':
            fSingle ^= 1;
            break;
        case 'o':
            fOriginalOnly ^= 1;
            break;
        case 'n':
            fNewLine ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( argc > globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Wrong number of auguments.\n" );
        goto usage;
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( argc == globalUtilOptind + 1 )
    {
        FILE * pFile = fopen( argv[globalUtilOptind], "rb" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Cannot open input file \"%s\". ", argv[globalUtilOptind] );
            return 1;
        }
        fclose( pFile );
        pExdc = Gia_AigerRead( argv[globalUtilOptind], 0, 0, 0 );
        if ( pExdc == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 1;
        }
    }

    pTemp = Gia_ManTranStoch( pAbc->pGia, nRestarts, nHops, nSeedBase, fMspf, fMerge, fResetHop, fZeroCostHop, fRefactor, fTruth, fSingle, fOriginalOnly, fNewLine, pExdc, nThreads, nVerbose );
    if ( pExdc != NULL )
        Gia_ManStop( pExdc );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &transtoch [-NMRPV num] [-mgrzftsonh] <file>\n" );
    Abc_Print( -2, "\t           iterates transduction with randomized parameters\n" );
    Abc_Print( -2, "\t-N num   : number of restarts [default = %d]\n", nRestarts );
    Abc_Print( -2, "\t-M num   : number of hops (if; mfs2; strash) [default = %d]\n", nHops );
    Abc_Print( -2, "\t-R num   : random seed [default = %d]\n", nSeedBase );
    Abc_Print( -2, "\t-P num   : number of threads [default = %d]\n", nThreads );
    Abc_Print( -2, "\t-V num   : verbosity level [default = %d]\n", nVerbose);
    Abc_Print( -2, "\t-m       : toggles using MSPF instead of CSPF [default = %s]\n", fMspf? "yes": "no" );
    Abc_Print( -2, "\t-g       : toggles using ResubShared [default = %s]\n", fMerge? "yes": "no" );
    Abc_Print( -2, "\t-r       : toggles resetting hop count when new minimum is found [default = %s]\n", fResetHop? "yes": "no" );
    Abc_Print( -2, "\t-z       : toggles using \"drf -z\" instead of \"if;mfs2;st\" for hop [default = %s]\n", fZeroCostHop? "yes": "no" );
    Abc_Print( -2, "\t-f       : toggles using \"drf -z\" instead of \"&dc2\" for ite [default = %s]\n", fRefactor? "yes": "no" );
    Abc_Print( -2, "\t-t       : toggles using truth table instead of BDD [default = %s]\n", fTruth? "yes": "no" );
    Abc_Print( -2, "\t-s       : toggles starting from the smallest starting point [default = %s]\n", fSingle? "yes": "no" );
    Abc_Print( -2, "\t-o       : toggles starting from the given AIG [default = %s]\n", fOriginalOnly? "yes": "no" );
    Abc_Print( -2, "\t-n       : toggles printing with a new line [default = %s]\n", fNewLine? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n" );
    Abc_Print( -2, "\t<file>   : AIGER specifying external don't-cares\n" );
    Abc_Print( -2, "\t\n" );
    Abc_Print( -2, "\t           This command was contributed by Yukio Miyasaka.\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9LNetMap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Ntk_t * Gia_ManPerformLNetMap( Gia_Man_t * p, int GroupSize, int fUseFixed, int fTryNew, int fVerbose );
    Abc_Ntk_t * pTemp;
    char * pFileName = NULL;
    int c, fTryNew = 1, nIns = 6, nOuts = 2, fUseFixed = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IOfxvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nIns = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nOuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            break;
        case 'f':
            fUseFixed ^= 1;
            break;
        case 'x':
            fTryNew ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Empty GIA network.\n" );
        return 1;
    }
    if ( argc == globalUtilOptind + 1 )
    {
        FILE * pFile = fopen( argv[globalUtilOptind], "rb" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9BCore(): Cannot open file \"%s\" for reading the simulation information.\n", argv[globalUtilOptind] );
            return 0;
        }
        fclose( pFile );
        pFileName = argv[globalUtilOptind];
    }
    pTemp = Gia_ManPerformLNetMap( pAbc->pGia, nOuts, fUseFixed, fTryNew, fVerbose );
    Abc_FrameReplaceCurrentNetwork( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &lnetmap [-IO num] [-fxvh] <file>\n" );
    Abc_Print( -2, "\t           performs specialized LUT mapping\n" );
    Abc_Print( -2, "\t-I num   : the input support size [default = %d]\n",         nIns );
    Abc_Print( -2, "\t-O num   : the output group size [default = %d]\n",          nOuts );
    Abc_Print( -2, "\t-f       : toggles using fixed primitives [default = %s]\n", fUseFixed? "yes": "no" );
    Abc_Print( -2, "\t-x       : toggles using another computation [default = %s]\n",      fTryNew? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n",         fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : prints the command usage\n");
    Abc_Print( -2, "\t<file>   : file name with simulation information\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Unmap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManTestStruct( Gia_Man_t * p );
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Struct(): There is no AIG to map.\n" );
        return 1;
    }
    Vec_IntFreeP( &pAbc->pGia->vMapping );
    Vec_IntFreeP( &pAbc->pGia->vPacking );
    Vec_IntFreeP( &pAbc->pGia->vCellMapping );
    Vec_IntFreeP( &pAbc->pGia->vEdge1 );
    Vec_IntFreeP( &pAbc->pGia->vEdge2 );
    return 0;

usage:
    Abc_Print( -2, "usage: &unmap [-vh]\n" );
    Abc_Print( -2, "\t           removes mapping from the current network\n" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Struct( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManTestStruct( Gia_Man_t * p );
    int c, fVerbose;
    // set defaults
    fVerbose   = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Struct(): There is no AIG to map.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Struct(): Mapping of the AIG is not defined.\n" );
        return 1;
    }
    if ( Gia_ManLutSizeMax(pAbc->pGia) >= 8 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Struct(): Can only handle nodes with less than 8 inputs.\n" );
        return 1;
    }
    Gia_ManTestStruct( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &struct [-vh]\n" );
    Abc_Print( -2, "\t           checks decomposition structures of the current mapping\n" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Trace( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    int fUseLutLib;
    int fVerbose;
    // set defaults
    fUseLutLib = 0;
    fVerbose   = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "lvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'l':
            fUseLutLib ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Speedup(): There is no AIG to map.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Speedup(): Mapping of the AIG is not defined.\n" );
        return 1;
    }
    pAbc->pGia->pLutLib = fUseLutLib ? pAbc->pLibLut : NULL;
    Gia_ManDelayTraceLutPrint( pAbc->pGia, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &trace [-lvh]\n" );
    Abc_Print( -2, "\t           performs delay trace of LUT-mapped network\n" );
    Abc_Print( -2, "\t-l       : toggle using unit- or LUT-library-delay model [default = %s]\n", fUseLutLib? "lib": "unit" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Speedup( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int fUseLutLib;
    int Percentage;
    int Degree;
    int fVerbose;
    int c, fVeryVerbose;

    // set defaults
    fUseLutLib   = 0;
    Percentage   = 5;
    Degree       = 2;
    fVerbose     = 0;
    fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PNlvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            Percentage = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Percentage < 1 || Percentage > 100 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            Degree = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Degree < 1 || Degree > 5 )
                goto usage;
            break;
        case 'l':
            fUseLutLib ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Speedup(): There is no AIG to map.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Speedup(): Mapping of the AIG is not defined.\n" );
        return 1;
    }
    pAbc->pGia->pLutLib = fUseLutLib ? pAbc->pLibLut : NULL;
    pTemp = Gia_ManSpeedup( pAbc->pGia, Percentage, Degree, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &speedup [-P num] [-N num] [-lvwh]\n" );
    Abc_Print( -2, "\t           transforms LUT-mapped network into an AIG with choices;\n" );
    Abc_Print( -2, "\t           the choices are added to speedup the next round of mapping\n" );
    Abc_Print( -2, "\t-P <num> : delay delta defining critical path for library model [default = %d%%]\n", Percentage );
    Abc_Print( -2, "\t-N <num> : the max critical path degree for resynthesis (0 < num < 6) [default = %d]\n", Degree );
    Abc_Print( -2, "\t-l       : toggle using unit- or LUT-library-delay model [default = %s]\n", fUseLutLib? "lib" : "unit" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Era( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Gia_Man_t * pTemp = NULL;
    int c, fVerbose = 0;
    int fUseCubes = 1;
    int fDumpFile = 0;
    int fMiter = 0;
    int nStatesMax = 1000000000;
    extern int Gia_ManCollectReachable( Gia_Man_t * pAig, int nStatesMax, int fMiter, int fDumpFile, int fVerbose );
    extern int Gia_ManArePerform( Gia_Man_t * pAig, int nStatesMax, int fMiter, int fVerbose );

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Smcdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nStatesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nStatesMax < 0 )
                goto usage;
            break;
        case 'm':
            fMiter ^= 1;
            break;
        case 'c':
            fUseCubes ^= 1;
            break;
        case 'd':
            fDumpFile ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Era(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Era(): The network is combinational.\n" );
        return 1;
    }
    if ( !fUseCubes && Gia_ManPiNum(pAbc->pGia) > 12 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Era(): The number of PIs (%d) should be no more than 12 when cubes are not used.\n", Gia_ManPiNum(pAbc->pGia) );
        return 1;
    }
    if ( fUseCubes && !fDumpFile )
        pAbc->Status = Gia_ManArePerform( pAbc->pGia, nStatesMax, fMiter, fVerbose );
    else
        pAbc->Status = Gia_ManCollectReachable( pAbc->pGia, nStatesMax, fMiter, fDumpFile, fVerbose );
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &era [-S num] [-mcdvh]\n" );
    Abc_Print( -2, "\t          explicit reachability analysis for small sequential AIGs\n" );
    Abc_Print( -2, "\t-S num  : the max number of states (num > 0) [default = %d]\n", nStatesMax );
    Abc_Print( -2, "\t-m      : stop when the miter output is 1 [default = %s]\n", fMiter? "yes": "no" );
    Abc_Print( -2, "\t-c      : use state cubes instead of state minterms [default = %s]\n", fUseCubes? "yes": "no" );
    Abc_Print( -2, "\t-d      : toggle dumping STG into a file [default = %s]\n", fDumpFile? "yes": "no" );
    Abc_Print( -2, "\t-v      : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Dch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManEquivReduce2( Gia_Man_t * p );
    Gia_Man_t * pTemp;
    Dch_Pars_t Pars, * pPars = &Pars;
    int c, fMinLevel = 0, fEquiv = 0;
    // set defaults
    Dch_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WCSsptfremgcxyvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWords < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nSatVarMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nSatVarMax < 0 )
                goto usage;
            break;
        case 's':
            pPars->fSynthesis ^= 1;
            break;
        case 'p':
            pPars->fPower ^= 1;
            break;
        case 't':
            pPars->fSimulateTfo ^= 1;
            break;
        case 'f':
            pPars->fLightSynth ^= 1;
            break;
        case 'r':
            pPars->fSkipRedSupp ^= 1;
            break;
        case 'e':
            fEquiv ^= 1;
            break;
        case 'm':
            fMinLevel ^= 1;
            break;
        case 'g':
            pPars->fUseGia ^= 1;
            break;
        case 'c':
            pPars->fUseCSat ^= 1;
            break;
        case 'x':
            pPars->fUseNew ^= 1;
            break;
        case 'y':
            pPars->fUseNew2 ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Dch(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManBufNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Dch(): This command does not work with barrier buffers.\n" );
        return 1;
    }
    if ( fEquiv )
    {
        Aig_Man_t * pNew = Gia_ManToAigSimple( pAbc->pGia );
        assert( Gia_ManObjNum(pAbc->pGia) == Aig_ManObjNum(pNew) );
        Dch_ComputeEquivalences( pNew, (Dch_Pars_t *)pPars );
        Gia_ManReprFromAigRepr( pNew, pAbc->pGia );
        Aig_ManStop( pNew );
        pTemp = Gia_ManEquivReduce( pAbc->pGia, 1, 0, 0, 0 );
    }
    else
    {
        pTemp = Gia_ManPerformDch( pAbc->pGia, pPars );
        Abc_FrameUpdateGia( pAbc, pTemp );
        if ( fMinLevel ) 
            pTemp = Gia_ManEquivReduce2( pAbc->pGia );
    }
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &dch [-WCS num] [-sptfremgcxyvh]\n" );
    Abc_Print( -2, "\t         computes structural choices using a new approach\n" );
    Abc_Print( -2, "\t-W num : the max number of simulation words [default = %d]\n", pPars->nWords );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-S num : the max number of SAT variables [default = %d]\n", pPars->nSatVarMax );
    Abc_Print( -2, "\t-s     : toggle synthesizing three snapshots [default = %s]\n", pPars->fSynthesis? "yes": "no" );
    Abc_Print( -2, "\t-p     : toggle power-aware rewriting [default = %s]\n", pPars->fPower? "yes": "no" );
    Abc_Print( -2, "\t-t     : toggle simulation of the TFO classes [default = %s]\n", pPars->fSimulateTfo? "yes": "no" );
    Abc_Print( -2, "\t-f     : toggle using lighter logic synthesis [default = %s]\n", pPars->fLightSynth? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle skipping choices with redundant support [default = %s]\n", pPars->fSkipRedSupp? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle computing and merging equivalences [default = %s]\n", fEquiv? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle minimizing logic level after merging equivalences [default = %s]\n", fMinLevel? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle using GIA to prove equivalences [default = %s]\n", pPars->fUseGia? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle using circuit-based SAT vs. MiniSat [default = %s]\n", pPars->fUseCSat? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggle using new choice computation [default = %s]\n", pPars->fUseNew? "yes": "no" );
    Abc_Print( -2, "\t-y     : toggle using new choice computation [default = %s]\n", pPars->fUseNew2? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose printout [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Rpm( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManDupReplaceCut( Gia_Man_t * p );
    Gia_Man_t * pTemp;
    int c, nCutMax   = 16;
    int fUseNaive    =  0;
    int fUseOldAlgo  =  0;
    int fVerbose     =  0;
    int fVeryVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Cnavwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCutMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCutMax < 0 )
                goto usage;
            break;
        case 'n':
            fUseNaive ^= 1;
            break;
        case 'a':
            fUseOldAlgo ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Rpm(): There is no AIG.\n" );
        return 0;
    }
    if ( fUseNaive )
        pTemp = Gia_ManDupReplaceCut( pAbc->pGia );
    else if ( fUseOldAlgo )
        pTemp = Abs_RpmPerformOld( pAbc->pGia, fVerbose );
    else
        pTemp = Abs_RpmPerform( pAbc->pGia, nCutMax, fVerbose, fVeryVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &rpm [-C num] [-navwh]\n" );
    Abc_Print( -2, "\t         performs structural reparametrization\n" );
    Abc_Print( -2, "\t-C num : max cut size for testing range equivalence [default = %d]\n", nCutMax );
    Abc_Print( -2, "\t-n     : toggle using naive reparametrization [default = %s]\n", fUseNaive? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle using old algorithm [default = %s]\n", fUseOldAlgo? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing more verbose information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9BackReach( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManCofTest( Gia_Man_t * pGia, int nFrameMax, int nConfMax, int nTimeMax, int fVerbose );

    Gia_Man_t * pTemp = NULL;
    int c, fVerbose = 0;
    int nFrameMax = 1000000;
    int nConfMax  = 1000000;
    int nTimeMax  =      10;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCTvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrameMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrameMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeMax < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9BackReach(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManPoNum(pAbc->pGia) != 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9BackReach(): The number of POs is different from 1.\n" );
        return 1;
    }
    pTemp = Gia_ManCofTest( pAbc->pGia, nFrameMax, nConfMax, nTimeMax, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &back_reach [-FCT <num>] [-vh]\n" );
    Abc_Print( -2, "\t         performs backward reachability by circuit cofactoring\n" );
    Abc_Print( -2, "\t-F num : the limit on the depth of induction [default = %d]\n", nFrameMax );
    Abc_Print( -2, "\t-C num : the conflict limit at a node during induction [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-T num : the timeout for property directed reachability [default = %d]\n", nTimeMax );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Posplit( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Aig_Man_t * Aig_ManSplit( Aig_Man_t * p, int nVars, int fVerbose );
    Aig_Man_t * pMan, * pAux;
    Gia_Man_t * pTemp = NULL;
    int c, nVars = 5, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Nvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nVars < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Posplit(): There is no AIG.\n" );
        return 1;
    }
    pMan = Gia_ManToAigSimple( pAbc->pGia );
    pMan = Aig_ManSplit( pAux = pMan, nVars, fVerbose );
    Aig_ManStop( pAux );
    if ( pMan != NULL )
    {
        pTemp = Gia_ManFromAigSimple( pMan );
        Aig_ManStop( pMan );
        Abc_FrameUpdateGia( pAbc, pTemp );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &posplit [-N num] [-vh]\n" );
    Abc_Print( -2, "\t         cofactors the property output w.r.t. a support subset\n" );
    Abc_Print( -2, "\t         (the OR of new PO functions is equal to the original property)\n" );
    Abc_Print( -2, "\t-N num : the number of random cofactoring variables [default = %d]\n", nVars );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Permute( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManDupPiPerm( Gia_Man_t * p );
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Posplit(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManDupPiPerm( pAbc->pGia );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &permute [-vh]\n" );
    Abc_Print( -2, "\t         permutes primary inputs\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

#ifdef ABC_USE_CUDD

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReachM( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Gia_ParLlb_t Pars, * pPars = &Pars;
    char * pLogFileName = NULL;
    int c;
    extern int Llb_ManModelCheckGia( Gia_Man_t * pGia, Gia_ParLlb_t * pPars );

    // set defaults
    Llb_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "TBFCHSLripcsyzvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBddMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBddMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nClusterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nClusterMax < 0 )
                goto usage;
            break;
        case 'H':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-H\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nHintDepth = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nHintDepth < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->HintFirst = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->HintFirst < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            pPars->fReorder ^= 1;
            break;
        case 'i':
            pPars->fIndConstr ^= 1;
            break;
        case 'p':
            pPars->fUsePivots ^= 1;
            break;
        case 'c':
            pPars->fCluster ^= 1;
            break;
        case 's':
            pPars->fSchedule ^= 1;
            break;
        case 'y':
            pPars->fSkipOutCheck ^= 1;
            break;
        case 'z':
            pPars->fSkipReach ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachM(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachM(): The current AIG has no latches.\n" );
        return 0;
    }
    if ( Gia_ManObjNum(pAbc->pGia) >= (1<<16) )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachM(): Currently cannot handle AIGs with more than %d objects.\n", (1<<16) );
        return 0;
    }
    pAbc->Status  = Llb_ManModelCheckGia( pAbc->pGia, pPars );
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "&reachm" );
    return 0;

usage:
    Abc_Print( -2, "usage: &reachm [-TBFCHS num] [-L file] [-ripcsyzvwh]\n" );
    Abc_Print( -2, "\t         model checking via BDD-based reachability (dependence-matrix-based)\n" );
    Abc_Print( -2, "\t-T num : approximate time limit in seconds (0=infinite) [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-B num : max number of nodes in the intermediate BDDs [default = %d]\n", pPars->nBddMax );
    Abc_Print( -2, "\t-F num : max number of reachability iterations [default = %d]\n", pPars->nIterMax );
    Abc_Print( -2, "\t-C num : max number of variables in a cluster [default = %d]\n", pPars->nClusterMax );
    Abc_Print( -2, "\t-H num : max number of hints to use [default = %d]\n", pPars->nHintDepth );
    Abc_Print( -2, "\t-S num : the number of the starting hint [default = %d]\n", pPars->HintFirst );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-r     : enable dynamic BDD variable reordering [default = %s]\n", pPars->fReorder? "yes": "no" );
    Abc_Print( -2, "\t-i     : enable extraction of inductive constraints [default = %s]\n", pPars->fIndConstr? "yes": "no" );
    Abc_Print( -2, "\t-p     : enable partitions for internal cut-points [default = %s]\n", pPars->fUsePivots? "yes": "no" );
    Abc_Print( -2, "\t-c     : enable clustering of partitions [default = %s]\n", pPars->fCluster? "yes": "no" );
    Abc_Print( -2, "\t-s     : enable scheduling of clusters [default = %s]\n", pPars->fSchedule? "yes": "no" );
    Abc_Print( -2, "\t-y     : skip checking property outputs [default = %s]\n", pPars->fSkipOutCheck? "yes": "no" );
    Abc_Print( -2, "\t-z     : skip reachability (run preparation phase only) [default = %s]\n", pPars->fSkipReach? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : prints dependency matrix [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReachP( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Gia_ParLlb_t Pars, * pPars = &Pars;
    Aig_Man_t * pMan;
    char * pLogFileName = NULL;
    int c;
    extern int Llb_ManReachMinCut( Aig_Man_t * pAig, Gia_ParLlb_t * pPars );

    // set defaults
    Llb_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NBFTLrbyzdvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nPartValue = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nPartValue < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBddMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBddMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            pPars->fReorder ^= 1;
            break;
        case 'b':
            pPars->fBackward ^= 1;
            break;
        case 'y':
            pPars->fSkipOutCheck ^= 1;
            break;
        case 'z':
            pPars->fSkipReach ^= 1;
            break;
        case 'd':
            pPars->fDumpReached ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachP(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachP(): The current AIG has no latches.\n" );
        return 0;
    }
    if ( Gia_ManObjNum(pAbc->pGia) >= (1<<16) )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachP(): Currently cannot handle AIGs with more than %d objects.\n", (1<<16) );
        return 0;
    }
    pMan          = Gia_ManToAigSimple( pAbc->pGia );
    pAbc->Status  = Llb_ManReachMinCut( pMan, pPars );
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pMan->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "&reachp" );
    Aig_ManStop( pMan );
    return 0;

usage:
    Abc_Print( -2, "usage: &reachp [-NFT num] [-L file] [-rbyzdvwh]\n" );
    Abc_Print( -2, "\t         model checking via BDD-based reachability (partitioning-based)\n" );
    Abc_Print( -2, "\t-N num : partitioning value (MinVol=nANDs/N/2; MaxVol=nANDs/N) [default = %d]\n", pPars->nPartValue );
//    Abc_Print( -2, "\t-B num : the BDD node increase when hints kick in [default = %d]\n", pPars->nBddMax );
    Abc_Print( -2, "\t-F num : max number of reachability iterations [default = %d]\n", pPars->nIterMax );
    Abc_Print( -2, "\t-T num : approximate time limit in seconds (0=infinite) [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-r     : enable additional BDD var reordering before image [default = %s]\n", pPars->fReorder? "yes": "no" );
    Abc_Print( -2, "\t-b     : perform backward reachability analysis [default = %s]\n", pPars->fBackward? "yes": "no" );
    Abc_Print( -2, "\t-y     : skip checking property outputs [default = %s]\n", pPars->fSkipOutCheck? "yes": "no" );
    Abc_Print( -2, "\t-z     : skip reachability (run preparation phase only) [default = %s]\n", pPars->fSkipReach? "yes": "no" );
    Abc_Print( -2, "\t-d     : dump BDD of reached states into file \"reached.blif\" [default = %s]\n", pPars->fDumpReached? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : prints additional information [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReachN( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Gia_ParLlb_t Pars, * pPars = &Pars;
    Aig_Man_t * pMan;
    char * pLogFileName = NULL;
    int c;
    extern int Llb_NonlinCoreReach( Aig_Man_t * pAig, Gia_ParLlb_t * pPars );

    // set defaults
    Llb_ManSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "BFTLryzvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBddMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBddMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'r':
            pPars->fReorder ^= 1;
            break;
        case 'y':
            pPars->fSkipOutCheck ^= 1;
            break;
        case 'z':
            pPars->fSkipReach ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachN(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachN(): The current AIG has no latches.\n" );
        return 0;
    }
    if ( Gia_ManObjNum(pAbc->pGia) >= (1<<16) )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachN(): Currently cannot handle AIGs with more than %d objects.\n", (1<<16) );
        return 0;
    }
    pMan          = Gia_ManToAigSimple( pAbc->pGia );
    pAbc->Status  = Llb_NonlinCoreReach( pMan, pPars );
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pMan->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "&reachn" );
    Aig_ManStop( pMan );
    return 0;

usage:
    Abc_Print( -2, "usage: &reachn [-BFT num] [-L file] [-ryzvh]\n" );
    Abc_Print( -2, "\t         model checking via BDD-based reachability (non-linear-QS-based)\n" );
    Abc_Print( -2, "\t-B num : the BDD node increase when hints kick in [default = %d]\n", pPars->nBddMax );
    Abc_Print( -2, "\t-F num : max number of reachability iterations [default = %d]\n", pPars->nIterMax );
    Abc_Print( -2, "\t-T num : approximate time limit in seconds (0=infinite) [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-r     : enable additional BDD var reordering before image [default = %s]\n", pPars->fReorder? "yes": "no" );
    Abc_Print( -2, "\t-y     : skip checking property outputs [default = %s]\n", pPars->fSkipOutCheck? "yes": "no" );
    Abc_Print( -2, "\t-z     : skip reachability (run preparation phase only) [default = %s]\n", pPars->fSkipReach? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
//    Abc_Print( -2, "\t-w     : prints additional information [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ReachY( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
    Gia_ParLlb_t Pars, * pPars = &Pars;
    Aig_Man_t * pMan;
    char * pLogFileName = NULL;
    int c;

    // set defaults
    Llb_ManSetDefaultParams( pPars );
    pPars->fCluster = 0;
    pPars->fReorder = 0;
    pPars->nBddMax     = 100;
    pPars->nClusterMax = 500;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "BCFTLbcryzvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBddMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBddMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nClusterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nClusterMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'b':
            pPars->fBackward ^= 1;
            break;
        case 'c':
            pPars->fCluster ^= 1;
            break;
        case 'r':
            pPars->fReorder ^= 1;
            break;
        case 'y':
            pPars->fSkipOutCheck ^= 1;
            break;
        case 'z':
            pPars->fSkipReach ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachN(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachN(): The current AIG has no latches.\n" );
        return 0;
    }
/*
    if ( Gia_ManObjNum(pAbc->pGia) >= (1<<16) )
    {
        Abc_Print( -1, "Abc_CommandAbc9ReachN(): Currently cannot handle AIGs with more than %d objects.\n", (1<<16) );
        return 0;
    }
*/
    pMan          = Gia_ManToAigSimple( pAbc->pGia );
    pAbc->Status  = Llb_Nonlin4CoreReach( pMan, pPars );
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pMan->pSeqModel );
    if ( pLogFileName )
        Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "&reachy" );
    Aig_ManStop( pMan );
    return 0;

usage:
    Abc_Print( -2, "usage: &reachy [-BCFT num] [-L file] [-bcryzvh]\n" );
    Abc_Print( -2, "\t         model checking via BDD-based reachability (non-linear-QS-based)\n" );
    Abc_Print( -2, "\t-B num : the max BDD size to introduce cut points [default = %d]\n", pPars->nBddMax );
    Abc_Print( -2, "\t-C num : the max BDD size to reparameterize/cluster [default = %d]\n", pPars->nClusterMax );
    Abc_Print( -2, "\t-F num : max number of reachability iterations [default = %d]\n", pPars->nIterMax );
    Abc_Print( -2, "\t-T num : approximate time limit in seconds (0=infinite) [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-b     : enable using backward enumeration [default = %s]\n", pPars->fBackward? "yes": "no" );
    Abc_Print( -2, "\t-c     : enable reparametrization clustering [default = %s]\n", pPars->fCluster? "yes": "no" );
    Abc_Print( -2, "\t-r     : enable additional BDD var reordering before image [default = %s]\n", pPars->fReorder? "yes": "no" );
    Abc_Print( -2, "\t-y     : skip checking property outputs [default = %s]\n", pPars->fSkipOutCheck? "yes": "no" );
    Abc_Print( -2, "\t-z     : skip reachability (run preparation phase only) [default = %s]\n", pPars->fSkipReach? "yes": "no" );
    Abc_Print( -2, "\t-v     : prints verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
//    Abc_Print( -2, "\t-w     : prints additional information [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

#endif

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Undo( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "h" ) ) != EOF )
    {
        switch ( c )
        {
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Undo(): There is no design.\n" );
        return 1;
    }
    if ( pAbc->pGia2 == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Undo(): There is no previously saved network.\n" );
        return 1;
    }
    Gia_ManStop( pAbc->pGia );
    pAbc->pGia = pAbc->pGia2;
    pAbc->pGia2 = NULL;
    return 0;

usage:
    Abc_Print( -2, "usage: &undo [-h]\n" );
    Abc_Print( -2, "\t        reverses the previous AIG transformation\n" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Mesh( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Bmc_MeshTest( Gia_Man_t * p, int X, int Y, int T, int fVerbose );
    extern void Bmc_MeshTest2( Gia_Man_t * p, int X, int Y, int T, int fVerbose );
    int X =  4;
    int Y =  4;
    int T =  3;
    int fUseSatoko = 1;
    int c, fVerbose = 1;
    // set defaults
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "XYTsh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'X':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-X\" should be followed by an integer.\n" );
                goto usage;
            }
            X = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( X < 3 )
                goto usage;
            break;
        case 'Y':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Y\" should be followed by an integer.\n" );
                goto usage;
            }
            Y = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Y < 3 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            T = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( T < 2 )
                goto usage;
            break;
        case 's':
            fUseSatoko ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mesh(): There is no design.\n" );
        return 1;
    }
    if ( Gia_ManCoNum(pAbc->pGia) != 1 )
    {
        Abc_Print( -1, "Currently this command expects AIG with one output.\n" );
        return 1;
    }
    if ( Gia_ManCiNum(pAbc->pGia) > 20 )
    {
        Abc_Print( -1, "Currently this command expects AIG with no more than 20 nodes.\n" );
        return 1;
    }
    if ( Gia_ManLevelNum(pAbc->pGia) > T )
    {
        Abc_Print( -1, "The depth of the AIG (%d) cannot be larger than the latency (%d).\n", Gia_ManLevelNum(pAbc->pGia), T );
        return 1;
    }
    if ( fUseSatoko )
        Bmc_MeshTest( pAbc->pGia, X, Y, T, fVerbose );
    else
        Bmc_MeshTest2( pAbc->pGia, X, Y, T, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &mesh [-XYT num] [-sh]\n" );
    Abc_Print( -2, "\t         creates a mesh architecture for the given AIG\n" );
    Abc_Print( -2, "\t-X num : horizontal size of the mesh (X >= 3) [default = %d]\n", X );
    Abc_Print( -2, "\t-Y num : vertical size of the mesh (Y >= 3) [default = %d]\n", Y );
    Abc_Print( -2, "\t-T num : the latency of the mesh (T >= 2) [default = %d]\n", T );
    Abc_Print( -2, "\t-s     : toggle using new SAT solver Satoko [default = %s]\n", fUseSatoko? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Iso( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pAig;
    Vec_Ptr_t * vPosEquivs;
//    Vec_Ptr_t * vPiPerms;
    int c, fNewAlgo = 1, fEstimate = 0, fBetterQual = 0, fDualOut = 0, fVerbose = 0, fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "neqdvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'n':
            fNewAlgo ^= 1;
            break;
        case 'e':
            fEstimate ^= 1;
            break;
        case 'q':
            fBetterQual ^= 1;
            break;
        case 'd':
            fDualOut ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iso(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManPoNum(pAbc->pGia) == 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iso(): The AIG has only one PO. Isomorphism detection is not performed.\n" );
        return 1;
    }
    if ( fNewAlgo )
        pAig = Gia_ManIsoReduce2( pAbc->pGia, &vPosEquivs, NULL, fEstimate, fBetterQual, fDualOut, fVerbose, fVeryVerbose );
    else
        pAig = Gia_ManIsoReduce( pAbc->pGia, &vPosEquivs, NULL, fEstimate, fDualOut, fVerbose, fVeryVerbose );
//    pAig = Gia_ManIsoReduce( pAbc->pGia, &vPosEquivs, &vPiPerms, 0, fDualOut, fVerbose, fVeryVerbose );
//    Vec_VecFree( (Vec_Vec_t *)vPiPerms );
    if ( pAig == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Iso(): Transformation has failed.\n" );
        return 1;
    }
    // update the internal storage of PO equivalences
    Abc_FrameReplacePoEquivs( pAbc, &vPosEquivs );
    // update the AIG
    Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &iso [-neqdvwh]\n" );
    Abc_Print( -2, "\t         removes POs with isomorphic sequential COI\n" );
    Abc_Print( -2, "\t-n     : toggle using new fast algorithm [default = %s]\n", fNewAlgo? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle computing lower bound on equivalence classes [default = %s]\n", fEstimate? "yes": "no" );
    Abc_Print( -2, "\t-q     : toggle improving quality at the expense of runtime [default = %s]\n", fBetterQual? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle treating the current AIG as a dual-output miter [default = %s]\n", fDualOut? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing very verbose information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9IsoNpn( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManIsoNpnReduce( Gia_Man_t * p, Vec_Ptr_t ** pvPosEquivs, int fVerbose );
    Gia_Man_t * pAig;
    Vec_Ptr_t * vPosEquivs;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoNpn(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManPoNum(pAbc->pGia) == 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoNpn(): The AIG has only one PO. Isomorphism detection is not performed.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoNpn(): ISO-NPN does not work with sequential AIGs.\n" );
        return 1;
    }
    pAig = Gia_ManIsoNpnReduce( pAbc->pGia, &vPosEquivs, fVerbose );
    if ( pAig == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoNpn(): Transformation has failed.\n" );
        return 1;
    }
    // update the internal storage of PO equivalences
    Abc_FrameReplacePoEquivs( pAbc, &vPosEquivs );
    // update the AIG
    Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &isonpn [-vh]\n" );
    Abc_Print( -2, "\t         removes POs with functionally isomorphic combinational COI\n" );
    Abc_Print( -2, "\t         (currently ignores POs whose structural support is more than 16)\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9IsoSt( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManIsoStrashReduce( Gia_Man_t * p, Vec_Ptr_t ** pvPosEquivs, int fVerbose );
    Gia_Man_t * pAig;
    Vec_Ptr_t * vPosEquivs;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoSt(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManPoNum(pAbc->pGia) == 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoSt(): The AIG has only one PO. Isomorphism detection is not performed.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoSt(): ISO-ST does not work with sequential AIGs.\n" );
        return 1;
    }
    pAig = Gia_ManIsoStrashReduce( pAbc->pGia, &vPosEquivs, fVerbose );
    if ( pAig == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9IsoSt(): Transformation has failed.\n" );
        return 1;
    }
    // update the internal storage of PO equivalences
    Abc_FrameReplacePoEquivs( pAbc, &vPosEquivs );
    // update the AIG
    Abc_FrameUpdateGia( pAbc, pAig );
    return 0;

usage:
    Abc_Print( -2, "usage: &isost [-vh]\n" );
    Abc_Print( -2, "\t         removes POs with functionally isomorphic combinational COI\n" );
    Abc_Print( -2, "\t         (this command relies exclusively on structural hashing)\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Compare( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_Iso4TestTwo( Gia_Man_t * pGia0, Gia_Man_t * pGia1 );
    Gia_Man_t * pGia0, * pGia1;
    char ** pArgvNew; int nArgcNew;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 2 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Compare(): This command expects two AIG file names on the command line.\n" );
        return 1;
    }
    pGia0 = Gia_AigerRead( pArgvNew[0], 0, 0, 0 );
    pGia1 = Gia_AigerRead( pArgvNew[1], 0, 0, 0 );
    if ( pGia0 == NULL || pGia1 == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Compare(): Reading input files did not work.\n" );
        return 1;
    }
    Gia_Iso4TestTwo( pGia0, pGia1 );
    Gia_ManStop( pGia0 );
    Gia_ManStop( pGia1 );
    return 0;

usage:
    Abc_Print( -2, "usage: &compare <file1> <file2> [-vh]\n" );
    Abc_Print( -2, "\t         compared two AIGs for structural similarity\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9RevEng( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManCompareSims( Gia_Man_t * pHie, Gia_Man_t * pFlat, int nWords, int fVerbose );
    Gia_Man_t * pGia0, * pGia1;
    char ** pArgvNew; int nArgcNew;
    int c, nWords = 4, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Wvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9RevEng(): There is no AIG.\n" );
        return 1;
    }
    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew != 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9RevEng(): This command expects one AIG file name on the command line.\n" );
        return 1;
    }
    pGia0 = pAbc->pGia;
    pGia1 = Gia_AigerRead( pArgvNew[0], 0, 0, 0 );
    if ( pGia0 == NULL || pGia1 == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9RevEng(): Reading input files did not work.\n" );
        return 1;
    }
    Gia_ManCompareSims( pGia0, pGia1, nWords, fVerbose );
    Gia_ManStop( pGia1 );
    return 0;

usage:
    Abc_Print( -2, "usage: &reveng [-W num] [-vh] <file>\n" );
    Abc_Print( -2, "\t         compares two AIGs for structural similarity\n" );
    Abc_Print( -2, "\t         the current AIG is expected to contain some hierarchy\n" );
    Abc_Print( -2, "\t         the given AIG from <file> is expected to be flat\n" );
    Abc_Print( -2, "\t-W num : the number of 64-bit words of simulation info [default = %d]\n", nWords );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Uif( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManDupUif( Gia_Man_t * p );
    extern Gia_Man_t * Gia_ManDupBlackBox( Gia_Man_t * p );
    Gia_Man_t * pNew = NULL, * pTemp = NULL;
    int c, fBlackBox = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fBlackBox ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Uif(): There is no AIG.\n" );
        return 1;
    }
    if ( pAbc->pGia->vBarBufs == NULL || Vec_IntSize(pAbc->pGia->vBarBufs) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Uif(): Hierarchy is not defined.\n" );
        return 1;
    }
    pNew = Gia_ManDupUif( pAbc->pGia );
    if ( fBlackBox )
    {
        pNew = Gia_ManDupBlackBox( pTemp = pNew );
        Gia_ManStop( pTemp );
    }
    Abc_FrameUpdateGia( pAbc, pNew );
    return 0;

usage:
    Abc_Print( -2, "usage: &uif [-bvh]\n" );
    Abc_Print( -2, "\t         eagerly adds UIF constraints when hierarchy is present\n" );
    Abc_Print( -2, "\t-b     : toggle blackboxing while adding constraints [default = %s]\n", fBlackBox? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9CexInfo( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Bmc_CexTest( Gia_Man_t * p, Abc_Cex_t * pCex, int fVerbose );
    int c, fDualOut = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "dvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'd':
            fDualOut ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9CexInfo(): There is no AIG.\n" );
        return 1;
    }
    if ( pAbc->pCex == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9CexInfo(): There is no CEX.\n" );
        return 1;
    }
    Bmc_CexTest( pAbc->pGia, pAbc->pCex, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &cexinfo [-vh]\n" );
    Abc_Print( -2, "\t         prints information about the current counter-example\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Cycle( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, nFrames = 10, fUseCex = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'c':
            fUseCex ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cycle(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManDupCycled( pAbc->pGia, fUseCex ? pAbc->pCex : NULL, nFrames );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &cycle [-F num] [-cvh]\n" );
    Abc_Print( -2, "\t         cycles sequential circuit for the given number of timeframes\n" );
    Abc_Print( -2, "\t         to derive a new initial state (which may be on the envelope)\n" );
    Abc_Print( -2, "\t-F num : the number of frames to simulate [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-c     : toggle using PI values from the current CEX [default = %s]\n", fUseCex? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Cone( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    Vec_Int_t * vPos;
    int c, nRegs = 0, iOutNum = -1, nOutRange = 1, iPartNum = -1, nLevelMax = 0, nTimeWindow = 0, fUseAllCis = 0, fExtractAll = 0, fComb = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ORPLWaecvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            iOutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iOutNum < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            nOutRange = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOutRange < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            iPartNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iPartNum < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevelMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevelMax < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeWindow = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeWindow < 0 )
                goto usage;
            break;
        case 'a':
            fUseAllCis ^= 1;
            break;
        case 'e':
            fExtractAll ^= 1;
            break;
        case 'c':
            fComb ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cone(): There is no AIG.\n" );
        return 1;
    }
    if ( fExtractAll )
    {
        char Buffer[1000];
        Gia_Obj_t * pObj; int i;
        unsigned char nDigits = (unsigned char)Abc_Base10Log(Gia_ManPoNum(pAbc->pGia));
        Gia_ManForEachPo( pAbc->pGia, pObj, i )
        {
            Gia_Man_t * pOne = Gia_ManDupDfsCone( pAbc->pGia, pObj );
            sprintf( Buffer, "%s_%0*d.aig", Extra_FileNameGeneric(pAbc->pGia->pSpec), nDigits, i );
            Gia_AigerWrite( pOne, Buffer, 0, 0, 0 );
            Gia_ManStop( pOne );
        }
        printf( "Dumped all outputs into individual AIGER files.\n" );
        return 0;
    }
    if ( nLevelMax || nTimeWindow )
    {
        if ( nLevelMax && nTimeWindow )
        {
            Abc_Print( -1, "Abc_CommandAbc9Cone(): Parameters -L (max level) and -W (timing window) cannot be specified at the same time.\n" );
            return 1;
        }
        else
        {
            pTemp = Gia_ManExtractWindow( pAbc->pGia, nLevelMax, nTimeWindow, fVerbose );
            Abc_FrameUpdateGia( pAbc, pTemp );
            return 0;
        }
    }
    if ( iPartNum >= 0 )
    {
        Vec_Int_t * vClass;
        Vec_Vec_t * vClasses = (Vec_Vec_t *)pAbc->vPoEquivs;
        if ( vClasses == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Cone(): Partitions are not defined.\n" );
            return 1;
        }
        if ( iPartNum >= Vec_VecSize(vClasses) )
        {
            Abc_Print( -1, "Abc_CommandAbc9Cone(): Partition index exceed the array size.\n" );
            return 1;
        }
        vClass = Vec_VecEntryInt( vClasses, iPartNum );
        pTemp = Gia_ManDupCones( pAbc->pGia, Vec_IntArray(vClass), Vec_IntSize(vClass), !fUseAllCis );
        if ( pTemp )
            Abc_FrameUpdateGia( pAbc, pTemp );
        return 0;
    }
    nRegs = Gia_ManRegNum( pAbc->pGia );
    if ( fComb )
        pAbc->pGia->nRegs = 0;
    if ( iOutNum < 0 || iOutNum + nOutRange > Gia_ManPoNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cone(): Range of outputs to extract is incorrect.\n" );
        if ( fComb )
            Gia_ManSetRegNum( pAbc->pGia, nRegs );
        return 1;
    }
    vPos = Vec_IntStartRange( iOutNum, nOutRange );
    pTemp = Gia_ManDupCones( pAbc->pGia, Vec_IntArray(vPos), nOutRange, !fUseAllCis );
    if ( fComb )
        Gia_ManSetRegNum( pAbc->pGia, nRegs );
    Vec_IntFree( vPos );
    if ( pTemp )
        Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &cone [-ORPLW num] [-aecvh]\n" );
    Abc_Print( -2, "\t         extracting multi-output sequential logic cones\n" );
    Abc_Print( -2, "\t-O num : the index of first PO to extract [default = %d]\n", iOutNum );
    Abc_Print( -2, "\t-R num : (optional) the number of outputs to extract [default = %d]\n", nOutRange );
    Abc_Print( -2, "\t-P num : (optional) the partition number to extract [default = %d]\n", iPartNum );
    Abc_Print( -2, "\t-L num : (optional) extract cones with higher level [default = %d]\n", nLevelMax );
    Abc_Print( -2, "\t-W num : (optional) extract cones falling into this window [default = %d]\n", nTimeWindow );
    Abc_Print( -2, "\t-a     : toggle keeping all CIs or structral support only [default = %s]\n", fUseAllCis? "all": "structural" );
    Abc_Print( -2, "\t-e     : toggle writing all outputs into individual files [default = %s]\n", fExtractAll? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle performing cone extraction combinationally [default = %s]\n", fComb? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Slice( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, nSuppSize = 6, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Svh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nSuppSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nSuppSize < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Slice(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManDupSliced( pAbc->pGia, nSuppSize );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &slice [-S num] [-vh]\n" );
    Abc_Print( -2, "\t         cuts the lower part of the AIG with nodes using their support\n" );
    Abc_Print( -2, "\t-S num : the largest support size to keep in the slide [default = %d]\n", nSuppSize );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9PoPart( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManFindPoPartition( Gia_Man_t * p, int SelectShift, int fOnlyCis, int fSetLargest, int fVerbose, Vec_Ptr_t ** pvPosEquivs );
    Gia_Man_t * pTemp;
    Vec_Ptr_t * vPosEquivs = NULL;
    int c, SelectShift = 0, fOnlyCis = 0, fSetLargest = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Simvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            SelectShift = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( SelectShift < 0 )
                goto usage;
            break;
        case 'i':
            fOnlyCis ^= 1;
            break;
        case 'm':
            fSetLargest ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9PoPart(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManFindPoPartition( pAbc->pGia, SelectShift, fOnlyCis, fSetLargest, fVerbose, &vPosEquivs );
    if ( pTemp )
        Abc_FrameUpdateGia( pAbc, pTemp );
    Abc_FrameReplacePoEquivs( pAbc, &vPosEquivs );
    return 0;

usage:
    Abc_Print( -2, "usage: &popart [-S num] [-imvh]\n" );
    Abc_Print( -2, "\t         partitioning of POs into equivalence classes\n" );
    Abc_Print( -2, "\t-S num : random seed to select the set of pivot nodes [default = %d]\n", SelectShift );
    Abc_Print( -2, "\t       : (if the seed is 0, the nodes with max fanout counts are used)\n" );
    Abc_Print( -2, "\t-i     : toggle allowing only CIs to be the pivots [default = %s]\n", fOnlyCis? "yes": "no" );
    Abc_Print( -2, "\t-m     : toggle using the largest part as the current network [default = %s]\n", fSetLargest? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9PoPart2( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManFindPoPartition2( Gia_Man_t * p, int iStartNum, int nDelta, int nOutsMin, int nOutsMax, int fSetLargest, int fVerbose, Vec_Ptr_t ** pvPosEquivs );
    Gia_Man_t * pTemp = NULL;
    Vec_Ptr_t * vPosEquivs = NULL;
    int c, iStartNum = 0, nDelta = 10, nOutsMin = 100, nOutsMax = 1000, fSetLargest = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "SDLUmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            iStartNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iStartNum < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDelta < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nOutsMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOutsMin < 0 )
                goto usage;
            break;
        case 'U':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-U\" should be followed by an integer.\n" );
                goto usage;
            }
            nOutsMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOutsMax < 0 )
                goto usage;
            break;
        case 'm':
            fSetLargest ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9PoPart(): There is no AIG.\n" );
        return 1;
    }
    pTemp = Gia_ManFindPoPartition2( pAbc->pGia, iStartNum, nDelta, nOutsMin, nOutsMax, fSetLargest, fVerbose, &vPosEquivs );
    if ( pTemp )
        Abc_FrameUpdateGia( pAbc, pTemp );
    Abc_FrameReplacePoEquivs( pAbc, &vPosEquivs );
    return 0;

usage:
    Abc_Print( -2, "usage: &popart2 [-SDLU num] [-mvh]\n" );
    Abc_Print( -2, "\t         extracting multi-output sequential logic cones\n" );
    Abc_Print( -2, "\t-S num : the index of the PO to start the cluster [default = %d]\n", iStartNum );
    Abc_Print( -2, "\t-D num : the max increase in flop count after adding one PO [default = %d]\n", nDelta );
    Abc_Print( -2, "\t-L num : the minimum number of POs in a cluster [default = %d]\n", nOutsMin );
    Abc_Print( -2, "\t-U num : the maximum number of POs in a cluster [default = %d]\n", nOutsMax );
    Abc_Print( -2, "\t-m     : toggle selecting the largest cluster [default = %s]\n", fSetLargest? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9GroupProve( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Int_t * Gia_ManGroupProve( Gia_Man_t * p, char * pCommLine, int nGroupSize, int fVerbose );
    Vec_Int_t * vStatus;
    char * pCommLine = NULL;
    int c, nGroupSize = 1, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "GSvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            nGroupSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nGroupSize <= 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a file name.\n" );
                goto usage;
            }
            pCommLine = argv[globalUtilOptind];
            globalUtilOptind++;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GroupProve(): There is no AIG.\n" );
        return 1;
    }
    if ( pCommLine == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GroupProve(): Command line is not given.\n" );
        return 1;
    }
    vStatus = Gia_ManGroupProve( pAbc->pGia, pCommLine, nGroupSize, fVerbose );
    Vec_IntFree( vStatus );
    return 0;

usage:
    Abc_Print( -2, "usage: &gprove [-GS num] [-vh]\n" );
    Abc_Print( -2, "\t         proves multi-output testcase by splitting outputs into groups\n" );
    Abc_Print( -2, "\t         (currently, group size more than one works only for \"bmc3\" and \"pdr\")\n" );
    Abc_Print( -2, "\t-G num : the size of one group [default = %d]\n", nGroupSize );
    Abc_Print( -2, "\t-S str : the command line to be executed for each group [default = %s]\n", pCommLine ? pCommLine : "none" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9MultiProve( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gia_ManMultiProve( Gia_Man_t * p, Bmc_MulPar_t * pPars );
    Vec_Int_t * vStatuses; int c;
    Bmc_MulPar_t Pars, * pPars = &Pars;
    memset( pPars, 0, sizeof(Bmc_MulPar_t) );
    pPars->TimeOutGlo =  30;
    pPars->TimeOutLoc =   2;
    pPars->TimeOutInc = 100;
    pPars->TimeOutGap =   0;
    pPars->TimePerOut =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "TLMGHsdvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOutGlo = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOutGlo < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOutLoc = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOutLoc <= 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOutInc = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOutInc <= 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeOutGap = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeOutGap <= 0 )
                goto usage;
            break;
        case 'H':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-H\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimePerOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimePerOut <= 0 )
                goto usage;
            break;
        case 's':
            pPars->fUseSyn ^= 1;
            break;
        case 'd':
            pPars->fDumpFinal ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9MultiProve(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9MultiProve(): The problem is combinational.\n" );
        return 1;
    }
    pAbc->Status = Gia_ManMultiProve( pAbc->pGia, pPars );
    vStatuses = Abc_FrameDeriveStatusArray( pAbc->pGia->vSeqModelVec );
    Abc_FrameReplacePoStatuses( pAbc, &vStatuses );
    Abc_FrameReplaceCexVec( pAbc, &pAbc->pGia->vSeqModelVec );
    return 0;

usage:
    Abc_Print( -2, "usage: &mprove [-TLMGH num] [-sdvwh]\n" );
    Abc_Print( -2, "\t         proves multi-output testcase by applying several engines\n" );
    Abc_Print( -2, "\t-T num : approximate global runtime limit in seconds [default = %d]\n",     pPars->TimeOutGlo );
    Abc_Print( -2, "\t-L num : approximate local runtime limit in seconds [default = %d]\n",      pPars->TimeOutLoc );
    Abc_Print( -2, "\t-M num : percentage of local runtime limit increase [default = %d]\n",      pPars->TimeOutInc );
    Abc_Print( -2, "\t-G num : approximate gap runtime limit in seconds [default = %d]\n",        pPars->TimeOutGap );
    Abc_Print( -2, "\t-H num : timeout per output in miliseconds [default = %d]\n",               pPars->TimePerOut );
    Abc_Print( -2, "\t-s     : toggle using combinational synthesis [default = %s]\n",            pPars->fUseSyn?      "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle dumping invariant into a file [default = %s]\n",            pPars->fDumpFinal?   "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",             pPars->fVerbose?     "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing additional verbose information [default = %s]\n",  pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SplitProve( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Cec_GiaSplitTest( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, int LookAhead, int fVerbose, int fVeryVerbose, int fSilent );
    int c, nProcs = 1, nTimeOut = 10, nIterMax = 0, LookAhead = 1, fVerbose = 0, fVeryVerbose = 0, fSilent = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PTILsvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nProcs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nProcs <= 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by a positive integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut <= 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIterMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            LookAhead = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( LookAhead <= 0 || LookAhead > 100 )
            {
                Abc_Print( -1, "Look-ahead value (\"-L <num>\") should be between 1 and 100.\n", LookAhead );
                goto usage;
            }
            break;
        case 's':
            fSilent ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SplitProve(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) > 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9SplitProve(): The problem is sequential.\n" );
        return 1;
    }
    pAbc->Status = Cec_GiaSplitTest( pAbc->pGia, nProcs, nTimeOut, nIterMax, LookAhead, fVerbose, fVeryVerbose, fSilent );
    pAbc->pCex = pAbc->pGia->pCexComb;  pAbc->pGia->pCexComb = NULL;
    return 0;

usage:
    Abc_Print( -2, "usage: &splitprove [-PTIL num] [-svwh]\n" );
    Abc_Print( -2, "\t         proves CEC problem by case-splitting\n" );
    Abc_Print( -2, "\t-P num : the number of concurrent processes [default = %d]\n",          nProcs );
    Abc_Print( -2, "\t-T num : runtime limit in seconds per subproblem [default = %d]\n",     nTimeOut );
    Abc_Print( -2, "\t-I num : the max number of iterations (0 = infinity) [default = %d]\n", nIterMax );
    Abc_Print( -2, "\t-L num : maximum look-ahead during cofactoring [default = %d]\n",       LookAhead );
    Abc_Print( -2, "\t-s     : enable silent computation (no reporting) [default = %s]\n",    fSilent? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",         fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing more verbose information [default = %s]\n",    fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Bmc( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Bmc_AndPar_t Pars, * pPars = &Pars;
    memset( pPars, 0, sizeof(Bmc_AndPar_t) );
    pPars->nStart        =    0;  // starting timeframe
    pPars->nFramesMax    =    0;  // maximum number of timeframes
    pPars->nFramesAdd    =   50;  // the number of additional frames
    pPars->nConfLimit    =    0;  // maximum number of conflicts at a node
    pPars->nTimeOut      =    0;  // timeout in seconds
    pPars->nLutSize      =    6;  // max LUT size for CNF computation
    pPars->nProcs        =    1;  // the number of parallel solvers
    pPars->fLoadCnf      =    0;  // dynamic CNF loading
    pPars->fDumpFrames   =    0;  // dump unrolled timeframes
    pPars->fUseSynth     =    0;  // use synthesis
    pPars->fUseOldCnf    =    0;  // use old CNF construction
    pPars->fVerbose      =    0;  // verbose
    pPars->fVeryVerbose  =    0;  // very verbose
    pPars->fNotVerbose   =    0;  // skip line-by-line print-out
    pPars->iFrame        =    0;  // explored up to this frame
    pPars->nFailOuts     =    0;  // the number of failed outputs
    pPars->nDropOuts     =    0;  // the number of dropped outputs
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "SFATKdscvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nStart < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesMax < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesAdd = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesAdd < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 0 )
                goto usage;
            break;
        case 'd':
            pPars->fDumpFrames ^= 1;
            break;
        case 's':
            pPars->fUseSynth ^= 1;
            break;
        case 'c':
            pPars->fUseOldCnf ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmc(): There is no AIG.\n" );
        return 0;
    }
    pAbc->Status  = Gia_ManBmcPerform( pAbc->pGia, pPars );
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &bmc [-SFATK num] [-dscvwh]\n" );
    Abc_Print( -2, "\t         performs bounded model checking\n" );
    Abc_Print( -2, "\t-S num : the starting timeframe [default = %d]\n",                      pPars->nStart );
    Abc_Print( -2, "\t-F num : the maximum number of timeframes [default = %d]\n",            pPars->nFramesMax );
    Abc_Print( -2, "\t-A num : the number of additional frames to unroll [default = %d]\n",   pPars->nFramesAdd );
    Abc_Print( -2, "\t-T num : approximate timeout in seconds [default = %d]\n",              pPars->nTimeOut );
    Abc_Print( -2, "\t-K num : the maximum cut size for CNF computation [default = %d]\n",    pPars->nLutSize );
    Abc_Print( -2, "\t-d     : toggle dumping unfolded timeframes [default = %s]\n",          pPars->fDumpFrames?  "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle synthesizing unrolled timeframes [default = %s]\n",     pPars->fUseSynth?    "yes": "no" );
    Abc_Print( -2, "\t-c     : toggle using old CNF computation [default = %s]\n",            pPars->fUseOldCnf?   "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",         pPars->fVerbose?     "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing information about unfolding [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SBmc( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Bmcs_ManPerform( Gia_Man_t * pGia, Bmc_AndPar_t * pPars );
    extern int Bmcg_ManPerform( Gia_Man_t * pGia, Bmc_AndPar_t * pPars );
    Bmc_AndPar_t Pars, * pPars = &Pars; int c;
    memset( pPars, 0, sizeof(Bmc_AndPar_t) );
    pPars->nStart        =    0;  // starting timeframe
    pPars->nFramesMax    =    0;  // maximum number of timeframes
    pPars->nFramesAdd    =    1;  // the number of additional frames
    pPars->nConfLimit    =    0;  // maximum number of conflicts at a node
    pPars->nTimeOut      =    0;  // timeout in seconds
    pPars->nLutSize      =    0;  // max LUT size for CNF computation
    pPars->nProcs        =    1;  // the number of parallel solvers
    pPars->fLoadCnf      =    0;  // dynamic CNF loading
    pPars->fDumpFrames   =    0;  // dump unrolled timeframes
    pPars->fUseSynth     =    0;  // use synthesis
    pPars->fUseOldCnf    =    0;  // use old CNF construction
    pPars->fUseGlucose   =    0;  // use Glucose 3.0
    pPars->fUseEliminate =    0;  // use variable elimination
    pPars->fVerbose      =    0;  // verbose
    pPars->fVeryVerbose  =    0;  // very verbose
    pPars->fNotVerbose   =    0;  // skip line-by-line print-out
    pPars->iFrame        =    0;  // explored up to this frame
    pPars->nFailOuts     =    0;  // the number of failed outputs
    pPars->nDropOuts     =    0;  // the number of dropped outputs
    pPars->pFuncOnFrameDone = pAbc->pFuncOnFrameDone; // frame done callback

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PCFATgevwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nProcs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nProcs < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfLimit < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesMax < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesAdd = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesAdd < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'g':
            pPars->fUseGlucose ^= 1;
            break;
        case 'e':
            pPars->fUseEliminate ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmcs(): There is no AIG.\n" );
        return 0;
    }
    if ( pPars->nProcs > 4 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmcs(): Currently this command can run at most 4 concurrent solvers.\n" );
        return 0;
    }
    pAbc->Status  = pPars->fUseGlucose ? Bmcg_ManPerform(pAbc->pGia, pPars) : Bmcs_ManPerform(pAbc->pGia, pPars);
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &bmcs [-PCFAT num] [-gevwh]\n" );
    Abc_Print( -2, "\t         performs bounded model checking\n" );
    Abc_Print( -2, "\t-P num : the number of parallel solvers [default = %d]\n",              pPars->nProcs );
    Abc_Print( -2, "\t-C num : the SAT solver conflict limit [default = %d]\n",               pPars->nConfLimit );
    Abc_Print( -2, "\t-F num : the maximum number of timeframes [default = %d]\n",            pPars->nFramesMax );
    Abc_Print( -2, "\t-A num : the number of additional frames to unroll [default = %d]\n",   pPars->nFramesAdd );
    Abc_Print( -2, "\t-T num : approximate timeout in seconds [default = %d]\n",              pPars->nTimeOut );
    Abc_Print( -2, "\t-g     : toggle using Glucose 3.0 by Gilles Audemard and Laurent Simon [default = %s]\n", pPars->fUseGlucose?  "Glucose" : "Satoko" );
    Abc_Print( -2, "\t-e     : toggle using variable eliminatation [default = %s]\n",         pPars->fUseEliminate?"yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",         pPars->fVerbose?     "yes": "no" );
    Abc_Print( -2, "\t-w     : toggle printing information about unfolding [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ChainBmc( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Bmc_ChainTest( Gia_Man_t * p, int nFrameMax, int nConfMax, int fVerbose, int fVeryVerbose, Vec_Ptr_t ** pvCexes );
    Vec_Ptr_t * vCexes = NULL;
    int nFrameMax    =  200;
    int nConfMax     =    0;
    int fVerbose     =    0;
    int fVeryVerbose =    0;
    int c;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FCvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrameMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrameMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfMax < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9ChainBmc(): There is no AIG.\n" );
        return 0;
    }
    if ( !Gia_ManRegNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9ChainBmc(): The AIG is combinational.\n" );
        return 0;
    }
    Bmc_ChainTest( pAbc->pGia, nFrameMax, nConfMax, fVerbose, fVeryVerbose, &vCexes );
    if ( vCexes ) Vec_PtrFreeFree( vCexes );
    //pAbc->Status  = ...;
    //pAbc->nFrames = pPars->iFrame;
    //Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;
usage:
    Abc_Print( -2, "usage: &chainbmc [-FC <num>] [-vwh]\n" );
    Abc_Print( -2, "\t           runs a specialized flavor of BMC\n" );
    Abc_Print( -2, "\t-F <num> : the max number of timeframes (0 = unused) [default = %d]\n", nFrameMax );
    Abc_Print( -2, "\t-C <num> : the max number of conflicts (0 = unused) [default = %d]\n", nConfMax );
    Abc_Print( -2, "\t-v       : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing even more information [default = %s]\n", fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9BCore( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c;
    Bmc_BCorePar_t Pars, * pPars = &Pars;
    memset( pPars, 0, sizeof(Bmc_BCorePar_t) );
    pPars->iFrame        =   10;  // timeframe
    pPars->iOutput       =    0;  // property output
    pPars->nTimeOut      =    0;  // timeout in seconds
    pPars->pFilePivots   = NULL;  // file name with AIG IDs of pivot objects
    pPars->pFileProof    = NULL;  // file name to write the resulting proof
    pPars->fVerbose      =    0;  // verbose output
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FOTVvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->iFrame = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->iFrame < 0 )
                goto usage;
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->iOutput = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->iOutput < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by a file name.\n" );
                goto usage;
            }
            pPars->pFilePivots = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9BCore(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9BCore(): AIG has no registers.\n" );
        return 0;
    }
    // get the file name
    if ( pPars->pFilePivots != NULL )
    {
        FILE * pFile;
        pFile = fopen( pPars->pFilePivots, "r" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9BCore(): Cannot open file \"%s\" with pivot node IDs.\n", pPars->pFilePivots );
            return 0;
        }
        fclose( pFile );
    }
    // get the file name
    if ( argc == globalUtilOptind + 1 )
    {
        FILE * pFile;
        pPars->pFileProof = argv[globalUtilOptind];
        pFile = fopen( pPars->pFileProof, "wb" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9BCore(): Cannot open file \"%s\" for writing the proof.\n", pPars->pFileProof );
            return 0;
        }
        fclose( pFile );
    }
    Bmc_ManBCorePerform( pAbc->pGia, pPars );
    return 0;

usage:
    Abc_Print( -2, "usage: &bcore [-FOTV num] [-vh] <file>\n" );
    Abc_Print( -2, "\t         records UNSAT core of the BMC instance\n" );
    Abc_Print( -2, "\t-F num : the zero-based index of a timeframe [default = %d]\n",         pPars->iFrame );
    Abc_Print( -2, "\t-O num : the zero-based index of a primary output [default = %d]\n",    pPars->iOutput );
    Abc_Print( -2, "\t-T num : approximate timeout in seconds [default = %d]\n",              pPars->nTimeOut );
    Abc_Print( -2, "\t-V file: file name with AIG IDs of pivot variables [default = no pivots]\n" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",         pPars->fVerbose?     "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t<file> : file name to write the resulting proof [default = stdout]\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ICheck( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, nFramesMax = 1, nTimeOut = 0, fEmpty = 0, fSearch = 1, fReverse = 0, fBackTopo = 0, fDump = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "MTesrbdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFramesMax <= 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 'e':
            fEmpty ^= 1;
            break;
        case 's':
            fSearch ^= 1;
            break;
        case 'r':
            fReverse ^= 1;
            break;
        case 'b':
            fBackTopo ^= 1;
            break;
        case 'd':
            fDump ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9ICheck(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9ICheck(): The AIG is combinational.\n" );
        return 0;
    }
    Vec_IntFreeP( &pAbc->vIndFlops );
    if ( fSearch )
        pAbc->vIndFlops = Bmc_PerformISearch( pAbc->pGia, nFramesMax, nTimeOut, fReverse, fBackTopo, fDump, fVerbose );
    else
        Bmc_PerformICheck( pAbc->pGia, nFramesMax, nTimeOut, fEmpty, fVerbose );
    pAbc->nIndFrames = pAbc->vIndFlops ? nFramesMax : 0;
    return 0;

usage:
    Abc_Print( -2, "usage: &icheck [-MT num] [-esrbdvh]\n" );
    Abc_Print( -2, "\t         performs specialized induction check\n" );
    Abc_Print( -2, "\t-M num : the number of timeframes used for induction [default = %d]\n",    nFramesMax );
    Abc_Print( -2, "\t-T num : approximate global runtime limit in seconds [default = %d]\n",    nTimeOut );
    Abc_Print( -2, "\t-e     : toggle using empty set of next-state functions [default = %s]\n", fEmpty? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle searching for a minimal subset [default = %s]\n",          fSearch? "yes": "no" );
    Abc_Print( -2, "\t-r     : toggle searching in the reverse order [default = %s]\n",          fReverse? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle searching in backward order from POs [default = %s]\n",    fBackTopo? "yes": "no" );
    Abc_Print( -2, "\t-d     : toggle printing out the resulting set [default = %s]\n",          fDump? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",            fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SatTest( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Bmc_LoadTest( Gia_Man_t * pGia, int fLoadCnf, int fVerbose );
    int c, fLoadCnf = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "cvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'c':
            fLoadCnf ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SatTest(): There is no AIG.\n" );
        return 0;
    }
    Bmc_LoadTest( pAbc->pGia, fLoadCnf, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &sattest [-cvh]\n" );
    Abc_Print( -2, "\t         performs testing of dynamic CNF loading\n" );
    Abc_Print( -2, "\t-c     : toggle dynamic CNF loading [default = %s]\n",          fLoadCnf? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9FFTest( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ParFfSetDefault( Bmc_ParFf_t * p );
    extern void Gia_ManFaultTest( Gia_Man_t * p, Gia_Man_t * pG, Bmc_ParFf_t * pPars );
    Bmc_ParFf_t Pars, * pPars = &Pars;
    char * pFileName = NULL, * pFileName2 = NULL;
    Gia_Man_t * pGold = NULL;
    int c;
    Gia_ParFfSetDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ATNKSGFkbsfcdeunvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->Algo = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->Algo < 0 || pPars->Algo > 4 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nIterCheck = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nIterCheck < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCardConstr = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCardConstr <= 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a string.\n" );
                goto usage;
            }
            pPars->pFormStr = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by a file name.\n" );
                goto usage;
            }
            pFileName2 = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by a file name.\n" );
                goto usage;
            }
            pFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'k':
            pPars->fNonStrict ^= 1;
            break;
        case 'b':
            pPars->fBasic ^= 1;
            break;
        case 's':
            pPars->fStartPats ^= 1;
            break;
        case 'f':
            pPars->fFfOnly ^= 1;
            break;
        case 'c':
            pPars->fCheckUntest ^= 1;
            break;
        case 'd':
            pPars->fDump ^= 1;
            break;
        case 'e':
            pPars->fDumpDelay ^= 1;
            break;
        case 'u':
            pPars->fDumpUntest ^= 1;
            break;
        case 'n':
            pPars->fDumpNewFaults ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    // read string from file
    if ( pFileName2 )
    {
        if ( !strcmp( Extra_FileNameExtension(pFileName2), "blif" ) )
        {
            extern char * Gia_DeriveFormula( Gia_Man_t * pGia, char ** ppNamesIn );
            Abc_Ntk_t * pNtk2 = Io_Read( pFileName2, Io_ReadFileType(pFileName2), 1, 0 );
            Abc_Ntk_t * pNtk3 = Abc_NtkStrash( pNtk2, 0, 0, 0 );
            Gia_Man_t * pGia  = Abc_NtkClpGia( pNtk3 );
            char ** ppNamesIn = Abc_NtkCollectCioNames( pNtk2, 0 );
            if ( Gia_ManCoNum(pGia) == 1 )
                pPars->pFormStr = Gia_DeriveFormula( pGia, ppNamesIn );
            else
                printf( "The formula BLIF file contains the network with more one output.\n" );
            ABC_FREE( ppNamesIn );
            Gia_ManStop( pGia );
            Abc_NtkDelete( pNtk2 );
            Abc_NtkDelete( pNtk3 );
            if ( pPars->pFormStr == NULL )
                goto usage;
        }
        else
        {
            FILE * pFile = fopen( pFileName2, "r" );
            if ( pFile == NULL )
            {
                Abc_Print( -1, "Abc_CommandAbc9FFTest(): File name \"%s\" with formula is invalid.\n", pFileName2 );
                return 0;
            }
            pPars->pFormStr = Extra_FileRead(pFile);
            fclose( pFile );
            // skip spaces
            while ( 1 )
            {
                int Len = strlen(pPars->pFormStr);
                char Char = pPars->pFormStr[Len-1];
                if ( Char == ' ' || Char == '\n' || Char == '\r' || Char == '\t' || Char == -51 )
                    pPars->pFormStr[Len-1] = '\0';
                else
                    break;
            }
        }
        printf( "Using formula \"%s\" from file \"%s\".\n", pPars->pFormStr, pFileName2 );
    }
    if ( pPars->Algo == 0 && pPars->pFormStr == NULL )
    {
        Abc_Print( -1, "Formula string (-S <str>) should be selected when algorithm is 0 (-A 0).\n" );
        return 0;
    }
    if ( pPars->Algo != 0 && pPars->pFormStr != NULL )
    {
        Abc_Print( -1, "Algorithm should be 0 (-A 0) when formula string is selected (-S <str>).\n" );
        return 0;
    }
    // get the file name
    if ( argc == globalUtilOptind + 1 )
    {
        FILE * pFile;
        pPars->pFileName = argv[globalUtilOptind];
        pFile = fopen( pPars->pFileName, "r" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Cannot open file \"%s\" with the input test patterns.\n", pPars->pFileName );
            return 0;
        }
        fclose( pFile );
    }
    // check other conditions
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9FFTest(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 && pPars->Algo == 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9FFTest(): For delay testing, AIG should be sequential.\n" );
        return 0;
    }
    // check if the file is valid
    if ( pFileName )
    {
        FILE * pFile = fopen( pFileName, "r" );
        if ( pFile == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9FFTest(): File name \"%s\" with golden model is invalid.\n", pFileName );
            return 0;
        }
        fclose( pFile );
        pGold = Gia_AigerRead( pFileName, 0, 0, 0 );
        if ( pGold == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9FFTest(): Cannot read file \"%s\" with golden model.\n", pFileName );
            return 0;
        }
        if ( Gia_ManPiNum(pAbc->pGia) != Gia_ManPiNum(pGold) )
        {
            Gia_ManStop( pGold );
            Abc_Print( -1, "Abc_CommandAbc9FFTest(): Old model and gold model have different number of PIs.\n" );
            return 0;
        }
        if ( Gia_ManPoNum(pAbc->pGia) != Gia_ManPoNum(pGold) )
        {
            Gia_ManStop( pGold );
            Abc_Print( -1, "Abc_CommandAbc9FFTest(): Old model and gold model have different number of POs.\n" );
            return 0;
        }
        printf( "Entered spec AIG from file \"%s\".\n", pFileName );
    }
    Gia_ManFaultTest( pAbc->pGia, pGold ? pGold : pAbc->pGia, pPars );
    Gia_ManStopP( &pGold );
    if ( pFileName2 )
        ABC_FREE( pPars->pFormStr );
    return 0;

usage:
    Abc_Print( -2, "usage: &fftest [-ATNK num] [-kbsfcdeunvh] <file> [-GF file] [-S str]\n" );
    Abc_Print( -2, "\t          performs functional fault test generation\n" );
    Abc_Print( -2, "\t-A num  : selects fault model for all gates [default = %d]\n", pPars->Algo );
    Abc_Print( -2, "\t                0: fault model is not selected (use -S str)\n" );
    Abc_Print( -2, "\t                1: delay fault testing for sequential circuits\n" );
    Abc_Print( -2, "\t                2: traditional stuck-at fault: -S (((a&b)&~p)|q)\n" );
    Abc_Print( -2, "\t                3: complement fault: -S ((a&b)^p)\n" );
    Abc_Print( -2, "\t                4: functionally observable fault\n" );
    Abc_Print( -2, "\t-T num  : specifies approximate runtime limit in seconds [default = %d]\n",        pPars->nTimeOut );
    Abc_Print( -2, "\t-N num  : specifies iteration to check for fixed parameters [default = %d]\n",     pPars->nIterCheck );
    Abc_Print( -2, "\t-K num  : specifies cardinality constraint (num > 0) [default = unused]\n" );
    Abc_Print( -2, "\t-k      : toggles non-strict cardinality (n <= K, instead of n == K) [default = %s]\n",pPars->fNonStrict?  "yes": "no" );
    Abc_Print( -2, "\t-b      : toggles testing for single faults (the same as \"-K 1\") [default = %s]\n", pPars->fBasic?      "yes": "no" );
    Abc_Print( -2, "\t-s      : toggles starting with the all-0 and all-1 patterns [default = %s]\n",    pPars->fStartPats?  "yes": "no" );
    Abc_Print( -2, "\t-f      : toggles faults at flop inputs only with \"-A 1\" and \"-S str\" [default = %s]\n",          pPars->fFfOnly?     "yes": "no" );
    Abc_Print( -2, "\t-c      : toggles checking if there are untestable faults [default = %s]\n",       pPars->fCheckUntest? "yes": "no" );
    Abc_Print( -2, "\t-d      : toggles dumping test patterns into file \"<file>_tests.txt\" [default = %s]\n", pPars->fDump?       "yes": "no" );
    Abc_Print( -2, "\t-e      : toggles dumping test pattern pairs (delay faults only) [default = %s]\n", pPars->fDumpDelay? "yes": "no" );
    Abc_Print( -2, "\t-u      : toggles dumping untestable faults into \"<file>_untest.txt\" [default = %s]\n", pPars->fDumpUntest? "yes": "no" );
    Abc_Print( -2, "\t-n      : toggles dumping faults not detected by a given test set [default = %s]\n", pPars->fDumpNewFaults? "yes": "no" );
    Abc_Print( -2, "\t-v      : toggles printing verbose information [default = %s]\n",                  pPars->fVerbose?    "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    Abc_Print( -2, "\t<file>  : (optional) file name with input test patterns\n\n");
    Abc_Print( -2, "\t-G file : (optional) file name with the golden model\n\n");
    Abc_Print( -2, "\t-F file : (optional) file name with the fault model in BLIF format\n");
    Abc_Print( -2, "\t-S str  : (optional) string representing the fault model\n");
    Abc_Print( -2, "\t          The following notations are used:\n");
    Abc_Print( -2, "\t            Functional variables: {a,b} (both a and b are always present)\n");
    Abc_Print( -2, "\t            Parameter variables: {p,q,r,s,t,u,v,w} (any number from 1 to 8)\n");
    Abc_Print( -2, "\t            Boolean operators: AND(&), OR(|), XOR(^), MUX(?:), NOT(~)\n");
    Abc_Print( -2, "\t            Parentheses should be used around each operator. Spaces not allowed.\n");
    Abc_Print( -2, "\t            Complement (~) is only allowed before variables (use DeMorgan law).\n");
    Abc_Print( -2, "\t            Examples:\n");
    Abc_Print( -2, "\t              (((a&b)&~p)|q)        stuck-at-0/1 at the output\n");
    Abc_Print( -2, "\t              (((a&~p)|q)&b)        stuck-at-0/1 at input a\n");
    Abc_Print( -2, "\t              (((a|p)&(b|q))&~r)    stuck-at-1 at the inputs and stuck-at-0 at the output\n");
    Abc_Print( -2, "\t              (((a&~p)&(b&~q))|r)   stuck-at-0 at the inputs and stuck-at-1 at the output\n");
    Abc_Print( -2, "\t              ((a&b)^p)             complement at the output\n");
    Abc_Print( -2, "\t              (((a^p)&(b^q))^r)     complement at the inputs and at the output\n");
    Abc_Print( -2, "\t              (a?(b?~s:r):(b?q:p))  functionally observable fault at the output\n");
    Abc_Print( -2, "\t              (p?(a|b):(a&b))       replace AND by OR\n");
    Abc_Print( -2, "\t           If the BLIF file is used for the formula with option \'-F\', following rules apply:\n");
    Abc_Print( -2, "\t              - the network should be combinational and have exactly one primary output\n");
    Abc_Print( -2, "\t              - input names should have only one character:\n");
    Abc_Print( -2, "\t                {a, b} (for functional variables)\n");
    Abc_Print( -2, "\t                {p,q,r,s,t,u,v,w} (for parameter variables)\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Qbf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_QbfDumpFile( Gia_Man_t * pGia, int nPars );
    extern void Gia_QbfDumpFileInv( Gia_Man_t * pGia, int nPars );
    extern int Gia_QbfSolve( Gia_Man_t * pGia, int nPars, int nIterLimit, int nConfLimit, int nTimeOut, int nEncVars, int fGlucose, int fVerbose );
    int c, nPars   = -1;
    int nIterLimit =  0;
    int nConfLimit =  0;
    int nTimeOut   =  0;
    int nEncVars   =  0;
    int fDumpCnf   =  0;
    int fDumpCnf2  =  0;
    int fGlucose   =  0;
    int fVerbose   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "PICTKdegvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPars < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIterLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIterLimit < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nConfLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nEncVars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nEncVars < 0 )
                goto usage;
            break;
        case 'd':
            fDumpCnf ^= 1;
            break;
        case 'e':
            fDumpCnf2 ^= 1;
            break;
        case 'g':
            fGlucose ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "There is no current GIA.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Works only for combinational networks.\n" );
        return 1;
    }
    if ( Gia_ManPoNum(pAbc->pGia) != 1 )
    {
        Abc_Print( -1, "The miter should have one primary output.\n" );
        return 1;
    }
    if ( !(nPars > 0 && nPars < Gia_ManPiNum(pAbc->pGia)) )
    {
        Abc_Print( -1, "The number of parameter variables is invalid (should be > 0 and < PI num).\n" );
        return 1;
    }
    if ( fDumpCnf )
        Gia_QbfDumpFile( pAbc->pGia, nPars );
    else if ( fDumpCnf2 )
        Gia_QbfDumpFileInv( pAbc->pGia, nPars );
    else
        Gia_QbfSolve( pAbc->pGia, nPars, nIterLimit, nConfLimit, nTimeOut, nEncVars, fGlucose, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &qbf [-PICTK num] [-degvh]\n" );
    Abc_Print( -2, "\t         solves QBF problem EpVxM(p,x)\n" );
    Abc_Print( -2, "\t-P num : number of parameters p (should be the first PIs) [default = %d]\n", nPars );
    Abc_Print( -2, "\t-I num : quit after the given iteration even if unsolved [default = %d]\n", nIterLimit );
    Abc_Print( -2, "\t-C num : conflict limit per problem [default = %d]\n", nConfLimit );
    Abc_Print( -2, "\t-T num : global timeout [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-K num : the number of input bits (for encoding miters only) [default = %d]\n", nEncVars );
    Abc_Print( -2, "\t-d     : toggle dumping QDIMACS file instead of solving (complemented QBF) [default = %s]\n", fDumpCnf? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle dumping QDIMACS file instead of solving (original QBF) [default = %s]\n", fDumpCnf2? "yes": "no" );
    Abc_Print( -2, "\t-g     : toggle using Glucose 3.0 by Gilles Audemard and Laurent Simon [default = %s]\n", fGlucose? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9QVar( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_QbfQuantifyAll( Gia_Man_t * p, int nPars, int fAndAll, int fOrAll );
    Gia_Man_t * pTemp;
    int c, nPars   = -1;
    int fQuantU    =  0;
    int fQuantE    =  0;
    int fVerbose   =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Puevh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPars = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPars < 0 )
                goto usage;
            break;
        case 'u':
            fQuantU ^= 1;
            break;
        case 'e':
            fQuantE ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "There is no current GIA.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Works only for combinational networks.\n" );
        return 1;
    }
    if ( !(nPars > 0 && nPars < Gia_ManPiNum(pAbc->pGia)) )
    {
        Abc_Print( -1, "The number of parameter variables is invalid (should be > 0 and < PI num).\n" );
        return 1;
    }
    pTemp = Gia_QbfQuantifyAll( pAbc->pGia, nPars, fQuantU, fQuantE );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &qvar [-P num] [-uevh]\n" );
    Abc_Print( -2, "\t         derives cofactors w.r.t. the last NumPi-<num> variables\n" );
    Abc_Print( -2, "\t-P num : number of parameters p (should be the first PIs) [default = %d]\n", nPars );
    Abc_Print( -2, "\t-u     : toggle ANDing cofactors (universal quantification) [default = %s]\n", fQuantU? "yes": "no" );
    Abc_Print( -2, "\t-e     : toggle ORing cofactors (existential quantification) [default = %s]\n", fQuantE? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9GenQbf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_GenQbfMiter( Gia_Man_t * pGia, int nFrames, int nLutNum, int nLutSize, char * pStr, int fUseOut, int fVerbose );
    int nFrames   =    1;
    int nLutNum   =    1;
    int nLutSize  =    6;
    char * pStr   = NULL;
    int fUseOut   =    0;
    int fVerbose  =    0;
    int c;
    Gia_Man_t * pTemp;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FKNSovh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutNum < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a string.\n" );
                goto usage;
            }
            pStr = Abc_UtilStrsav(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pStr == NULL )
                goto usage;
            break;
        case 'o':
            fUseOut ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "There is no current GIA.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Works only for sequential networks.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) < nLutSize * nLutNum )
    {
        Abc_Print( -1, "The number of flops (%d) is less than required (%d).\n", Gia_ManRegNum(pAbc->pGia), nLutSize * nLutNum );
        return 1;
    }
    if ( nFrames != 1 || nLutNum != 1 )
    {
        Abc_Print( -1, "Currently this commands works for one frame and one LUT.\n" );
        return 1;
    }
    pTemp = Gia_GenQbfMiter( pAbc->pGia, nFrames, nLutNum, nLutSize, pStr, fUseOut, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    ABC_FREE( pStr );
    return 0;

usage:
    Abc_Print( -2, "usage: &genqbf [-FKN num] [-ovh]\n" );
    Abc_Print( -2, "\t         generates QBF miter for computing an inductive invariant\n" );
    Abc_Print( -2, "\t-F num : the number of time frames for induction [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-K num : the LUT size [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-N num : the number of LUTs [default = %d]\n", nLutNum );
    Abc_Print( -2, "\t-o     : toggle using the last output [default = %s]\n", fUseOut? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9HomoQbf( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_Gen2CreateMiter( int nLutSize, int nLutNum );
    int nLutSize  =  2;
    int nLutNum   =  3;
    int fVerbose  =  0;
    int c;
    Gia_Man_t * pTemp;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KNvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutSize < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nLutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLutNum < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pTemp = Gia_Gen2CreateMiter( nLutSize, nLutNum );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &homoqbf [-KN num] [-vh]\n" );
    Abc_Print( -2, "\t         generates QBF miter for the encoding problem\n" );
    Abc_Print( -2, "\t-K num : the LUT size [default = %d]\n", nLutSize );
    Abc_Print( -2, "\t-N num : the number of LUTs [default = %d]\n", nLutNum );
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SatFx( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Bmc_FxCompute( Gia_Man_t * p );
    extern int Bmc_FxComputeOne( Gia_Man_t * p, int nIterMax, int nDiv2Add );
    int nIterMax =  5;
    int nDiv2Add = 10;
    int c, fDec  =  1;
    int fVerbose =  0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IDdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIterMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIterMax < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nDiv2Add = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nDiv2Add < 0 )
                goto usage;
            break;
        case 'd':
            fDec ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SatFx(): There is no AIG.\n" );
        return 0;
    }
    if ( fDec )
        Bmc_FxComputeOne( pAbc->pGia, nIterMax, nDiv2Add );
    else
        Bmc_FxCompute( pAbc->pGia );
    return 0;

usage:
    Abc_Print( -2, "usage: &satfx [-ID num] [-dvh]\n" );
    Abc_Print( -2, "\t         performs SAT based shared logic extraction\n" );
    Abc_Print( -2, "\t-I num : the number of iterations of divisor extraction [default = %d]\n", nIterMax );
    Abc_Print( -2, "\t-D num : the number of divisors to extract in each iteration [default = %d]\n", nDiv2Add );
    Abc_Print( -2, "\t-d     : toggles decomposing the first output [default = %s]\n", fDec? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SatClp( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Str_t * Bmc_CollapseOne( Gia_Man_t * p, int nCubeLim, int nBTLimit, int fCanon, int fReverse, int fVerbose );
    int nCubeLim = 1000;
    int nBTLimit = 1000000;
    int fCanon   = 0;
    int fVerbose = 0;
    int c;

    Vec_Str_t * vSop;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CLcvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCubeLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCubeLim < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBTLimit < 0 )
                goto usage;
            break;
        case 'c':
            fCanon ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SatClp(): There is no AIG.\n" );
        return 0;
    }
    vSop = Bmc_CollapseOne( pAbc->pGia, nCubeLim, nBTLimit, fCanon, 0, fVerbose );
    printf( "%s\n", Vec_StrArray(vSop) );
    Vec_StrFree( vSop );
    return 0;

usage:
    Abc_Print( -2, "usage: &satclp [-CL num] [-cvh]\n" );
    Abc_Print( -2, "\t         performs SAT based collapsing\n" );
    Abc_Print( -2, "\t-C num : the limit on the SOP size of one output [default = %d]\n", nCubeLim );
    Abc_Print( -2, "\t-L num : the limit on the number of conflicts in one SAT call [default = %d]\n", nBTLimit );
    Abc_Print( -2, "\t-c     : toggles using canonical ISOP computation [default = %s]\n", fCanon? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Inse( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Int_t * Gia_ManInseTest( Gia_Man_t * p, Vec_Int_t * vInit, int nFrames, int nWords, int nTimeOut, int fSim, int fVerbose );
    int c, nFrames = 10, nWords = 1000, nTimeOut = 0, fSim = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWTsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 's':
            fSim ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Inse(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Inse(): AIG is combinational.\n" );
        return 0;
    }
    if ( pAbc->pGia->vInitClasses != NULL )
    {
        Abc_Print( 1, "Abc_CommandAbc9Inse(): All-0 initial state is assumed.\n" );
        Vec_IntFreeP( &pAbc->pGia->vInitClasses );
    }
    pAbc->pGia->vInitClasses = Gia_ManInseTest( pAbc->pGia, NULL, nFrames, nWords, nTimeOut, fSim, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &inse [-FWT num] [-svh]\n" );
    Abc_Print( -2, "\t         experimental procedure\n" );
    Abc_Print( -2, "\t-F num : the number of timeframes [default = %d]\n",                    nFrames );
    Abc_Print( -2, "\t-W num : the number of machine words [default = %d]\n",                 nWords );
    Abc_Print( -2, "\t-T num : approximate global runtime limit in seconds [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-s     : toggles using ternary simulation [default = %s]\n",            fSim?     "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",        fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Maxi( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Int_t * Gia_ManMaxiTest( Gia_Man_t * p, Vec_Int_t * vInit, int nFrames, int nWords, int nTimeOut, int fSim, int fVerbose );
    Vec_Int_t * vTemp;
    int c, nFrames = 5, nWords = 1000, nTimeOut = 0, fSim = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWTsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 's':
            fSim ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Maxi(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Maxi(): AIG is combinational.\n" );
        return 0;
    }
    pAbc->pGia->vInitClasses = Gia_ManMaxiTest( pAbc->pGia, vTemp = pAbc->pGia->vInitClasses, nFrames, nWords, nTimeOut, fSim, fVerbose );
    Vec_IntFreeP( &vTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &maxi [-FWT num] [-svh]\n" );
    Abc_Print( -2, "\t         experimental procedure\n" );
    Abc_Print( -2, "\t-F num : the number of timeframes [default = %d]\n",                    nFrames );
    Abc_Print( -2, "\t-W num : the number of machine words [default = %d]\n",                 nWords );
    Abc_Print( -2, "\t-T num : approximate global runtime limit in seconds [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-s     : toggles using ternary simulation [default = %s]\n",            fSim?     "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",        fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Bmci( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gia_ManBmciTest( Gia_Man_t * p, Vec_Int_t * vInit, int nFrames, int nWords, int nTimeOut, int fSim, int fVerbose );
    int c, nFrames = 1000, nWords = 1000, nTimeOut = 0, fSim = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FWTsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 's':
            fSim ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmci(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmci(): AIG is combinational.\n" );
        return 0;
    }
    if ( pAbc->pGia->vInitClasses == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmci(): Init array is not given.\n" );
        return 0;
    }
    Gia_ManBmciTest( pAbc->pGia, pAbc->pGia->vInitClasses, nFrames, nWords, nTimeOut, fSim, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &bmci [-FWT num] [-svh]\n" );
    Abc_Print( -2, "\t         experimental procedure\n" );
    Abc_Print( -2, "\t-F num : the number of timeframes [default = %d]\n",                    nFrames );
    Abc_Print( -2, "\t-W num : the number of machine words [default = %d]\n",                 nWords );
    Abc_Print( -2, "\t-T num : approximate global runtime limit in seconds [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-s     : toggles using ternary simulation [default = %s]\n",            fSim?     "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",        fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9PoXsim( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Vec_Int_t * Gia_ManPoXSim( Gia_Man_t * p, int nFrames, int fVerbose );
    int c, nFrames = 1000, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmci(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Bmci(): AIG is combinational.\n" );
        return 0;
    }
    Vec_IntFreeP( &pAbc->vAbcObjIds );
    pAbc->vAbcObjIds = Gia_ManPoXSim( pAbc->pGia, nFrames, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &poxsim [-F num] [-vh]\n" );
    Abc_Print( -2, "\t         X-valued simulation of the multi-output sequential miter\n" );
    Abc_Print( -2, "\t-F num : the number of timeframes [default = %d]\n",                    nFrames );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",        fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Demiter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fDumpFiles = 0, fDumpFilesTwo = 0, fDual = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ftdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'f':
            fDumpFiles ^= 1;
            break;
        case 't':
            fDumpFilesTwo ^= 1;
            break;
        case 'd':
            fDual ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Demiter(): There is no AIG.\n" );
        return 0;
    }
    if ( fDumpFiles || fDumpFilesTwo )
    {
        char pName0[1000] = "miter_part0.aig";
        char pName1[1000] = "miter_part1.aig";
        Gia_Man_t * pPart1, * pPart2;
        if ( Gia_ManPoNum(pAbc->pGia) % 2 != 0 )
        {
            Abc_Print( -1, "Abc_CommandAbc9Demiter(): Does not look like a dual-output miter.\n" );
            return 0;
        }
        if ( fDumpFilesTwo )
            Gia_ManDemiterTwoWords( pAbc->pGia, &pPart1, &pPart2 );
        else
            Gia_ManDemiterDual( pAbc->pGia, &pPart1, &pPart2 );
        if ( pAbc->pGia->pSpec )
        {
            char * pGen = Extra_FileNameGeneric(pAbc->pGia->pSpec);
            sprintf( pName0, "%s_1.aig", pGen );
            sprintf( pName1, "%s_2.aig", pGen );
            ABC_FREE( pGen );
        }
        Gia_AigerWrite( pPart1, pName0, 0, 0, 0 );
        Gia_AigerWrite( pPart2, pName1, 0, 0, 0 );
        Gia_ManStop( pPart1 );
        Gia_ManStop( pPart2 );
        if ( fDumpFilesTwo )
            printf( "Two parts of the two-word miter are dumped into files \"%s\" and \"%s\".\n", pName0, pName1 );
        else
            printf( "Two parts of the dual-output miter are dumped into files \"%s\" and \"%s\".\n", pName0, pName1 );
        return 0;
    }
    if ( Gia_ManPoNum(pAbc->pGia) != 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Demiter(): Miter should have one output.\n" );
        return 0;
    }
    if ( fDual )
        pTemp = Gia_ManDemiterToDual( pAbc->pGia );
    else
        pTemp = Gia_ManDupDemiter( pAbc->pGia, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    if ( fVerbose )
        Gia_ManPrintStatsMiter( pTemp, 0 );
    return 0;

usage:
    Abc_Print( -2, "usage: &demiter [-ftdvh]\n" );
    Abc_Print( -2, "\t         decomposes a miter (by default, tries to extract an OR gate)\n" );
    Abc_Print( -2, "\t-f     : write files with two sides of a dual-output miter [default = %s]\n",  fDumpFiles? "yes": "no" );
    Abc_Print( -2, "\t-t     : write files with two sides of a two-word miter [default = %s]\n",  fDumpFilesTwo? "yes": "no" );
    Abc_Print( -2, "\t-d     : take single-output and decompose into dual-output [default = %s]\n",  fDual? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Fadds( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManDupWithNaturalBoxes( Gia_Man_t * p, int nFaddMin, int fVerbose );
    extern Gia_Man_t * Gia_ManDupWithArtificialBoxes( Gia_Man_t * p, int DelayC, int nPathMin, int nPathMax, int nPathLimit, int fUseFanout, int fXorTrick, int fIgnoreBoxDelays, int fVerbose );
    Gia_Man_t * pTemp, * pTemp2;
    int c, nFaddMin = 3, fUseNat = 0, fUseArt = 0, fVerbose = 0;
    int DelayC = 0, nPathMin = 3, nPathMax = 32, nPathLimit = 50, fUseFanout = 0, fUseXorTrick = 0, fIgnoreBoxDelays = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NBSLPnafxbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nFaddMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFaddMin < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            DelayC = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( DelayC < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            nPathMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPathMin < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            nPathMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPathMax < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nPathLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nPathLimit < 0 )
                goto usage;
            break;
        case 'n':
            fUseNat ^= 1;
            break;
        case 'a':
            fUseArt ^= 1;
            break;
        case 'f':
            fUseFanout ^= 1;
            break;
        case 'x':
            fUseXorTrick ^= 1;
            break;
        case 'b':
            fIgnoreBoxDelays ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Fadds(): There is no AIG.\n" );
        return 0;
    }
    if ( fUseNat )
        pTemp = Gia_ManDupWithNaturalBoxes( pAbc->pGia, nFaddMin, fVerbose );
    else
    {
        pTemp = Gia_ManDup( pAbc->pGia );
        Gia_ManTransferTiming( pTemp, pAbc->pGia );
    }
    if ( fUseArt )
        pTemp2 = Gia_ManDupWithArtificialBoxes( pTemp, DelayC, nPathMin, nPathMax, nPathLimit, fUseFanout, fUseXorTrick, fIgnoreBoxDelays, fVerbose );
    else
    {
        pTemp2 = Gia_ManDup( pTemp );
        Gia_ManTransferTiming( pTemp2, pTemp );
    }
    Gia_ManStop( pTemp );
    Abc_FrameUpdateGia( pAbc, pTemp2 );
    return 0;
usage:
    Abc_Print( -2, "usage: &fadds [-NBSLP num] [-nafxvh]\n" );
    Abc_Print( -2, "\t         detects full-adder chains and puts them into white boxes\n" );
    Abc_Print( -2, "\t-n     : toggles detecting natural full-adder chains [default = %s]\n",              fUseNat? "yes": "no" );
    Abc_Print( -2, "\t-N num : minimum length of a natural full-adder chain to detect [default = %d]\n",   nFaddMin );
    Abc_Print( -2, "\t-a     : toggles detecting artificial full-adder chains [default = %s]\n",           fUseArt? "yes": "no" );
    Abc_Print( -2, "\t-B num : full-adder box delay (percentage of AND-gate delay) [default = %d]\n",      DelayC );
    Abc_Print( -2, "\t-S num : minimum length of an artificial full-adder chain [default = %d]\n",         nPathMin );
    Abc_Print( -2, "\t-L num : maximum length of an artificial full-adder chain [default = %d]\n",         nPathMax );
    Abc_Print( -2, "\t-P num : maximum number of artificial full-adder chains to detect [default = %d]\n", nPathLimit );
    Abc_Print( -2, "\t-f     : toggles allowing external fanouts in artificial chains [default = %s]\n",   fUseFanout? "yes": "no" );
    Abc_Print( -2, "\t-x     : toggles using XOR to generate fanouts in artificial chains [default = %s]\n",   fUseXorTrick? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggles ignoring boxes when computing delays [default = %s]\n",             fIgnoreBoxDelays? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",                     fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ATree( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_PolynCoreDetectTest( Gia_Man_t * pGia, int fAddExtra, int fAddCones, int fVerbose );
    Gia_Man_t * pTemp = NULL;
    int c, fAddExtra = 0, fAddCones = 0, fVerbose = 0, fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ecvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'e':
            fAddExtra ^= 1;
            break;
        case 'c':
            fAddCones ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Esop(): There is no AIG.\n" );
        return 0;
    }
    pTemp = Gia_PolynCoreDetectTest( pAbc->pGia, fAddExtra, fAddCones, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &atree [-ecvwh]\n" );
    Abc_Print( -2, "\t         extracts adder tree rooting in primary outputs\n" );
    Abc_Print( -2, "\t-e     : toggles adding extra outputs [default = %s]\n",  fAddExtra? "yes": "no" );
    Abc_Print( -2, "\t-c     : toggles duplicating complete AIG [default = %s]\n",  fAddCones? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggles printing very verbose information [default = %s]\n",  fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Polyn( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_PolynBuild2Test( Gia_Man_t * pGia, char * pSign, int nExtra, int fSigned, int fVerbose, int fVeryVerbose );
    Vec_Int_t * vOrder = NULL; char * pSign = NULL;
    int c, nExtra = 0, fOld = 0, fSimple = 1, fSigned = 0, fVerbose = 0, fVeryVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NSoasvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nExtra = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nExtra < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by a char string without spaces.\n" );
                goto usage;
            }
            pSign = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'o':
            fOld ^= 1;
            break;
        case 'a':
            fSimple ^= 1;
            break;
        case 's':
            fSigned ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'w':
            fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Esop(): There is no AIG.\n" );
        return 0;
    }
    if ( argc >= globalUtilOptind + 1 )
    {
        printf( "Trailing symbols on the command line (\"%s\").\n", argv[globalUtilOptind] );
        return 0;
    }
    if ( fOld )
    {
        vOrder = fSimple ? NULL : Gia_PolynReorder( pAbc->pGia, fVerbose, fVeryVerbose );
        Gia_PolynBuild( pAbc->pGia, vOrder, fSigned, fVerbose, fVeryVerbose );
        Vec_IntFreeP( &vOrder );
    }
    else
        Gia_PolynBuild2Test( pAbc->pGia, pSign, nExtra, fSigned, fVerbose, fVeryVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &polyn [-N num] [-oasvwh] [-S str]\n" );
    Abc_Print( -2, "\t         derives algebraic polynomial from AIG\n" );
    Abc_Print( -2, "\t-N num : the number of additional primary outputs (-1 = unused) [default = %d]\n", nExtra );
    Abc_Print( -2, "\t-o     : toggles old computation [default = %s]\n",  fOld? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggles simple computation [default = %s]\n",  fSimple? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggles signed computation [default = %s]\n",  fSigned? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w     : toggles printing very verbose information [default = %s]\n",  fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\t\n");
    Abc_Print( -2, "\t-S str : (optional) the output signature as a character string\n" );
    Abc_Print( -2, "\t         The format used to represent the output signature is very restrictive.\n" );
    Abc_Print( -2, "\t         It should be a string without spaces containing monomials in terms of\n" );
    Abc_Print( -2, "\t         inputs (i<num>) and outputs (o<num>) where <num> is 0-based. Coefficients\n" );
    Abc_Print( -2, "\t         are degrees of two, represented by log2 of their value: for example, \n" );
    Abc_Print( -2, "\t         \"2\" is 2^2 = 4, \"-4\" is -2^4=-16, \"-0\" is -2^0=-1, etc\n" );
    Abc_Print( -2, "\t         Two types of signature are accepted:\n" );
    Abc_Print( -2, "\t         (1) a sequence of monomials without parentheses (for example, \"-2*o0+1*o1+0*o2\")\n" );
    Abc_Print( -2, "\t         (2) a product of two sequences followed by a sum with a sequence\n" );
    Abc_Print( -2, "\t             (for example, \"(4*o0+2*o1+1*o2)*(4*i3+2*i4+1*i5)+(4*o3+2*o4+1*o5)\")\n" );
    Abc_Print( -2, "\t         Here is the signature of a signed 2-bit multiplier: \"(0*o0+1*o1+2*o2-3*o3)\"\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Acec( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    FILE * pFile;
    Acec_ParCec_t ParsCec, * pPars = &ParsCec;
    char ** pArgvNew;
    int c, nArgcNew;
    Acec_ManCecSetDefaultParams( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "CTmdtbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->TimeLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->TimeLimit < 0 )
                goto usage;
            break;
        case 'm':
            pPars->fMiter ^= 1;
            break;
        case 'd':
            pPars->fDualOutput ^= 1;
            break;
        case 't':
            pPars->fTwoOutput ^= 1;
            break;
        case 'b':
            pPars->fBooth ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pPars->fMiter )
    {
        Gia_Man_t * pGia0, * pGia1, * pDual;
        if ( argc != globalUtilOptind )
        {
            Abc_Print( -1, "Abc_CommandAbc9Acec(): If the input is a miter, it cannot be given on the command line.\n" );
            return 1;
        }
        if ( pAbc->pGia == NULL )
        {
            Abc_Print( -1, "Abc_CommandAbc9Acec(): There is no AIG.\n" );
            return 1;
        }
        if ( pPars->fDualOutput )
        {
            if ( Gia_ManPoNum(pAbc->pGia) & 1 )
            {
                Abc_Print( -1, "The dual-output miter should have an even number of outputs.\n" );
                return 1;
            }
            if ( !pPars->fSilent )
            Abc_Print( 1, "Assuming the current network is a double-output miter. (Conflict limit = %d.)\n", pPars->nBTLimit );
            Gia_ManDemiterDual( pAbc->pGia, &pGia0, &pGia1 );
            pAbc->Status = Acec_Solve( pGia0, pGia1, pPars );
        }
        else if ( pPars->fTwoOutput )
        {
            if ( Gia_ManPoNum(pAbc->pGia) & 1 )
            {
                Abc_Print( -1, "The two-output miter should have an even number of outputs.\n" );
                return 1;
            }
            if ( !pPars->fSilent )
            Abc_Print( 1, "Assuming the current network is a two-word miter. (Conflict limit = %d.)\n", pPars->nBTLimit );
            Gia_ManDemiterTwoWords( pAbc->pGia, &pGia0, &pGia1 );
            pAbc->Status = Acec_Solve( pGia0, pGia1, pPars );
        }
        else // regular single- or multi-output miter
        {
            if ( !pPars->fSilent )
            Abc_Print( 1, "Assuming the current network is a regular single- or multi-output miter. (Conflict limit = %d.)\n", pPars->nBTLimit );
            pDual = Gia_ManDemiterToDual( pAbc->pGia );
            Gia_ManDemiterDual( pDual, &pGia0, &pGia1 );
            Gia_ManStop( pDual );
            pAbc->Status = Acec_Solve( pGia0, pGia1, pPars );
        }
        Abc_FrameReplaceCex( pAbc, &pGia0->pCexComb );
        Gia_ManStop( pGia0 );
        Gia_ManStop( pGia1 );
        return 0;
    }

    pArgvNew = argv + globalUtilOptind;
    nArgcNew = argc - globalUtilOptind;
    if ( nArgcNew == 0 || nArgcNew == 1 )
    {
        Gia_Man_t * pSecond;
        char * pTemp, * FileName = NULL;
        if ( nArgcNew == 0 )
        {
            FileName = pAbc->pGia->pSpec;
            if ( FileName == NULL )
            {
                Abc_Print( -1, "File name is not given on the command line.\n" );
                return 1;
            }
        }
        else // if ( nArgcNew == 1 )
        {
            FileName = pArgvNew[0];
            // fix the wrong symbol
            for ( pTemp = FileName; *pTemp; pTemp++ )
                if ( *pTemp == '>' )
                    *pTemp = '\\';
            if ( (pFile = fopen( FileName, "r" )) == NULL )
            {
                Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
                if ( (FileName = Extra_FileGetSimilarName( FileName, ".aig", NULL, NULL, NULL, NULL )) )
                    Abc_Print( 1, "Did you mean \"%s\"?", FileName );
                Abc_Print( 1, "\n" );
                return 1;
            }
            fclose( pFile );
        }
        pSecond = Gia_AigerRead( FileName, 0, 0, 0 );
        if ( pSecond == NULL )
        {
            Abc_Print( -1, "Reading AIGER has failed.\n" );
            return 0;
        }
        pAbc->Status = Acec_Solve( pAbc->pGia, pSecond, pPars );
        Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexComb );
        Gia_ManStop( pSecond );
    }
    else if ( nArgcNew == 2 )
    {
        Gia_Man_t * pGias[2] = {NULL};  int i;
        char * pTemp, * FileName[2] = { pArgvNew[0], pArgvNew[1] };
        for ( i = 0; i < 2; i++ )
        {
            // fix the wrong symbol
            for ( pTemp = FileName[i]; *pTemp; pTemp++ )
                if ( *pTemp == '>' )
                    *pTemp = '\\';
            if ( (pFile = fopen( FileName[i], "r" )) == NULL )
            {
                Abc_Print( -1, "Cannot open input file \"%s\". ", FileName[i] );
                if ( (FileName[i] = Extra_FileGetSimilarName( FileName[i], ".aig", NULL, NULL, NULL, NULL )) )
                    Abc_Print( 1, "Did you mean \"%s\"?", FileName[i] );
                Abc_Print( 1, "\n" );
                return 1;
            }
            fclose( pFile );
            pGias[i] = Gia_AigerRead( FileName[i], 0, 0, 0 );
            if ( pGias[i] == NULL )
            {
                Abc_Print( -1, "Reading AIGER has failed.\n" );
                return 0;
            }
        }
        pAbc->Status = Acec_Solve( pGias[0], pGias[1], pPars );
        Abc_FrameReplaceCex( pAbc, &pGias[0]->pCexComb );
        Gia_ManStop( pGias[0] );
        Gia_ManStop( pGias[1] );
    }
    else
    {
        Abc_Print( -1, "Too many command-line arguments.\n" );
        return 1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &acec [-CT num] [-mdtbvh] <file1> <file2>\n" );
    Abc_Print( -2, "\t         combinational equivalence checking for arithmetic circuits\n" );
    Abc_Print( -2, "\t-C num : the max number of conflicts at a node [default = %d]\n", pPars->nBTLimit );
    Abc_Print( -2, "\t-T num : approximate runtime limit in seconds [default = %d]\n", pPars->TimeLimit );
    Abc_Print( -2, "\t-m     : toggle miter vs. two circuits [default = %s]\n", pPars->fMiter? "miter":"two circuits");
    Abc_Print( -2, "\t-d     : toggle using dual output miter [default = %s]\n", pPars->fDualOutput? "yes":"no");
    Abc_Print( -2, "\t-t     : toggle using two-word miter [default = %s]\n", pPars->fTwoOutput? "yes":"no");
    Abc_Print( -2, "\t-b     : toggle working with Booth multipliers [default = %s]\n", pPars->fBooth? "yes":"no");
    Abc_Print( -2, "\t-v     : toggle verbose output [default = %s]\n", pPars->fVerbose? "yes":"no");
    Abc_Print( -2, "\t-h     : print the command usage\n");
    Abc_Print( -2, "\tfile1  : (optional) the file with the first network\n");
    Abc_Print( -2, "\tfile2  : (optional) the file with the second network\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Anorm( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fBooth = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fBooth ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Anorm(): There is no AIG.\n" );
        return 0;
    }
    pTemp = Acec_Normalize( pAbc->pGia, fBooth, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &anorm [-bvh]\n" );
    Abc_Print( -2, "\t         normalize adder trees in the current AIG\n" );
    Abc_Print( -2, "\t-b     : toggles working with Booth multipliers [default = %s]\n",  fBooth? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Decla( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp;
    int c, fBooth = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "bvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'b':
            fBooth ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Decla(): There is no AIG.\n" );
        return 0;
    }
    pTemp = Acec_ManDecla( pAbc->pGia, fBooth, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &decla [-bvh]\n" );
    Abc_Print( -2, "\t         removes carry look ahead adders\n" );
    Abc_Print( -2, "\t-b     : toggles working with Booth multipliers [default = %s]\n",  fBooth? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Esop( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Eso_ManCompute( Gia_Man_t * pGia, int fVerbose, Vec_Wec_t ** pvRes );
    Gia_Man_t * pTemp;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Esop(): There is no AIG.\n" );
        return 0;
    }
    pTemp = Eso_ManCompute( pAbc->pGia, fVerbose, NULL );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &esop [-vh]\n" );
    Abc_Print( -2, "\t         derives Exclusive Sum of Products from AIG\n" );
    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Exorcism( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Abc_ExorcismMain( Vec_Wec_t * vEsop, int nIns, int nOuts, char * pFileNameOut, int Quality, int Verbosity, int nCubesMax, int fUseQCost );
    extern Vec_Wec_t * Abc_ExorcismNtk2Esop( Abc_Ntk_t * pNtk );

    extern Gia_Man_t * Eso_ManCompute( Gia_Man_t * pGia, int fVerbose, Vec_Wec_t ** pvRes );
    Vec_Wec_t * vEsop = NULL;
    Abc_Ntk_t * pNtk = NULL;
    char * pFileNameIn = NULL;
    char * pFileNameOut = NULL;
    int c, Quality = 2, Verbosity = 0, nCubesMax = 20000, fUseQCost = 0, fVerbose = 0;
    int nInputs = -1, nOutputs = -1;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "QVCqvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            Quality = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Quality < 0 )
                goto usage;
            break;
        case 'V':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-V\" should be followed by an integer.\n" );
                goto usage;
            }
            Verbosity = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Verbosity < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            nCubesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nCubesMax < 0 )
                goto usage;
            break;
        case 'q':
            fUseQCost ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }

    if ( argc == globalUtilOptind + 2 )
    {
        pFileNameIn = argv[globalUtilOptind];
        pFileNameOut = argv[globalUtilOptind + 1];
    }
    else if ( argc == globalUtilOptind + 1 )
    {
        pFileNameOut = argv[globalUtilOptind];
    }
    else
    {
        Abc_Print( -1, "Abc_CommandAbc9Exorcism(): Argument error.\n" );
        goto usage;
    }

    if ( pAbc->pGia == NULL && pFileNameIn == NULL )
    {
      Abc_Print( -1, "Abc_CommandAbc9Exorcism(): There is neither an AIG nor an ESOP-PLA file.\n" );
      return 0;
    }

    if ( pFileNameIn )
    {
        pNtk = Io_ReadPla( pFileNameIn, 0, 0, 0, /* no preprocessing = */1, /* check = */1 );
        if ( pNtk == NULL )
        {
            printf( "Reading PLA file has failed.\n" );
            return 1;
        }
        nInputs = Abc_NtkCiNum( pNtk );
        nOutputs = Abc_NtkCoNum( pNtk );
        vEsop = Abc_ExorcismNtk2Esop( pNtk );
        if ( vEsop == NULL )
        {
            printf( "Converting PLA to ESOP failed.\n" );
            return 1;
        }
    }
    else if ( pAbc->pGia )
    {
        // generate starting cover
        nInputs = Gia_ManCiNum( pAbc->pGia );
        nOutputs = Gia_ManCoNum( pAbc->pGia );
        Eso_ManCompute( pAbc->pGia, fVerbose, &vEsop );
    }

    if ( vEsop )
    {
        // run minimization
        Abc_ExorcismMain( vEsop, nInputs, nOutputs, pFileNameOut, Quality, Verbosity, nCubesMax, fUseQCost );
        Vec_WecFree( vEsop );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &exorcism [-Q N] [-V N] [-C N] -q [file_in] <file_out>\n" );
    Abc_Print( -2, "                     performs heuristic exclusive sum-of-project minimization\n" );
    Abc_Print( -2, "        -Q N       : minimization quality [default = %d]\n", Quality);
    Abc_Print( -2, "                     increasing this number improves quality and adds to runtime\n");
    Abc_Print( -2, "        -V N       : verbosity level [default = %d]\n", Verbosity);
    Abc_Print( -2, "                     0 = no output; 1 = outline; 2 = verbose\n");
    Abc_Print( -2, "        -C N       : maximum number of cubes in startign cover [default = %d]\n", nCubesMax );
    Abc_Print( -2, "        -q         : toggle using quantum cost [default = %s]\n", fUseQCost? "yes": "no" );
    Abc_Print( -2, "        [file_in]  : optional input file in ESOP-PLA format (otherwise current AIG is used)\n");
    Abc_Print( -2, "        <file_out> : output file in ESOP-PLA format\n");
    Abc_Print( -2, "\n" );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Mfs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManPerformMfs( Gia_Man_t * p, Sfm_Par_t * pPars );
    Gia_Man_t * pTemp; int c;
    Sfm_Par_t Pars, * pPars = &Pars;
    Sfm_ParSetDefault( pPars );
    pPars->nTfoLevMax  =    5;
    pPars->nDepthMax   =  100;
    pPars->nWinSizeMax = 2000;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WFDMLCNdaeblvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfoLevMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfoLevMax < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFanoutMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFanoutMax < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nDepthMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nDepthMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWinSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWinSizeMax < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nGrowthLevel = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nGrowthLevel < 0 || pPars->nGrowthLevel > ABC_INFINITY )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nNodesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nNodesMax < 0 )
                goto usage;
            break;
        case 'd':
            pPars->fRrOnly ^= 1;
            break;
        case 'a':
            pPars->fArea ^= 1;
            break;
        case 'e':
            pPars->fMoreEffort ^= 1;
            break;
        case 'b':
            pPars->fAllBoxes ^= 1;
            break;
        case 'l':
            pPars->fUseDcs ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mfs(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManBufNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mfs(): This command does not work with barrier buffers.\n" );
        return 1;
    }
    if ( !Gia_ManHasMapping(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mfs(): The current AIG has no mapping.\n" );
        return 0;
    }
    if ( Gia_ManLutSizeMax(pAbc->pGia) > 15 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mfs(): The current mapping has nodes with more than 15 inputs. Cannot use \"mfs\".\n" );
        return 0;
    }
/*
    if ( pAbc->pGia->pAigExtra && Gia_ManPiNum(pAbc->pGia->pAigExtra) > 6 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mfs(): The current white-boxes have more than 6 inputs. Cannot use \"mfs\".\n" );
        return 0;
    }
*/
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
        pTemp = Gia_ManPerformMfs( pAbc->pGia, pPars );
    else
    {
        int nRegs = Gia_ManRegNum(pAbc->pGia);
        pAbc->pGia->nRegs = 0;
        pTemp = Gia_ManPerformMfs( pAbc->pGia, pPars );
        Gia_ManSetRegNum( pAbc->pGia, nRegs );
        Gia_ManSetRegNum( pTemp, nRegs );
    }
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &mfs [-WFDMLCN <num>] [-daeblvwh]\n" );
    Abc_Print( -2, "\t           performs don't-care-based optimization of logic networks\n" );
    Abc_Print( -2, "\t-W <num> : the number of levels in the TFO cone (0 <= num) [default = %d]\n",             pPars->nTfoLevMax );
    Abc_Print( -2, "\t-F <num> : the max number of fanouts to skip (1 <= num) [default = %d]\n",                pPars->nFanoutMax );
    Abc_Print( -2, "\t-D <num> : the max depth nodes to try (0 = no limit) [default = %d]\n",                   pPars->nDepthMax );
    Abc_Print( -2, "\t-M <num> : the max node count of windows to consider (0 = no limit) [default = %d]\n",    pPars->nWinSizeMax );
    Abc_Print( -2, "\t-L <num> : the max increase in node level after resynthesis (0 <= num) [default = %d]\n", pPars->nGrowthLevel );
    Abc_Print( -2, "\t-C <num> : the max number of conflicts in one SAT run (0 = no limit) [default = %d]\n",   pPars->nBTLimit );
    Abc_Print( -2, "\t-N <num> : the max number of nodes to try (0 = all) [default = %d]\n",                    pPars->nNodesMax );
    Abc_Print( -2, "\t-d       : toggle performing redundancy removal [default = %s]\n",                        pPars->fRrOnly? "yes": "no" );
    Abc_Print( -2, "\t-a       : toggle minimizing area or area+edges [default = %s]\n",                        pPars->fArea? "area": "area+edges" );
    Abc_Print( -2, "\t-e       : toggle high-effort resubstitution [default = %s]\n",                           pPars->fMoreEffort? "yes": "no" );
    Abc_Print( -2, "\t-b       : toggle preserving all white boxes [default = %s]\n",                           pPars->fAllBoxes? "yes": "no" );
    Abc_Print( -2, "\t-l       : toggle deriving don't-cares [default = %s]\n",                                 pPars->fUseDcs? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",                        pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n",                pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Mfsd( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Sbd_NtkPerform( Gia_Man_t * pGia, Sbd_Par_t * pPars );
    Gia_Man_t * pTemp; int c;
    Sbd_Par_t Pars, * pPars = &Pars;
    Sbd_ParSetDefault( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "KSNPWFMCmcdpvwh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutSize < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLutNum < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutSize < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nCutNum = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nCutNum < 0 )
                goto usage;
            break;
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfoLevels = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfoLevels < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTfoFanMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTfoFanMax < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nWinSizeMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nWinSizeMax < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nBTLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nBTLimit < 0 )
                goto usage;
            break;
        case 'm':
            pPars->fMapping ^= 1;
            break;
        case 'c':
            pPars->fMoreCuts ^= 1;
            break;
        case 'd':
            pPars->fFindDivs ^= 1;
            break;
        case 'p':
            pPars->fUsePath ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mfsd(): There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManBufNum(pAbc->pGia) )
    {
        Abc_Print( -1, "Abc_CommandAbc9Mfsd(): This command does not work with barrier buffers.\n" );
        return 1;
    }
    if ( Gia_ManHasMapping(pAbc->pGia) )
        Abc_Print( 1, "The current AIG has mapping, which can be used to determine critical path if \"-p\" is selected.\n" );
    pTemp = Sbd_NtkPerform( pAbc->pGia, pPars );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &mfsd [-KSNPWFMC <num>] [-mcdpvwh]\n" );
    Abc_Print( -2, "\t           performs SAT-based delay-oriented AIG optimization\n" );
    Abc_Print( -2, "\t-K <num> : the LUT size for delay minimization (2 <= num <= 6) [default = %d]\n",         pPars->nLutSize );
    Abc_Print( -2, "\t-S <num> : the LUT structure size (1 <= num <= 2) [default = %d]\n",                      pPars->nLutNum );
    Abc_Print( -2, "\t-N <num> : the cut size considered for optimization (2 <= num <= 10) [default = %d]\n",   pPars->nCutSize );
    Abc_Print( -2, "\t-P <num> : the number of cuts computed at a node (1 <= num <= 500) [default = %d]\n",     pPars->nCutNum );
    Abc_Print( -2, "\t-W <num> : the number of levels in the TFO cone (0 <= num) [default = %d]\n",             pPars->nTfoLevels );
    Abc_Print( -2, "\t-F <num> : the max number of fanouts to skip (1 <= num) [default = %d]\n",                pPars->nTfoFanMax );
    Abc_Print( -2, "\t-M <num> : the max node count of windows to consider (0 = no limit) [default = %d]\n",    pPars->nWinSizeMax );
    Abc_Print( -2, "\t-C <num> : the max number of conflicts in one SAT run (0 = no limit) [default = %d]\n",   pPars->nBTLimit );
    Abc_Print( -2, "\t-m       : toggle generating delay-oriented mapping [default = %s]\n",                    pPars->fMapping? "yes": "no" );
    Abc_Print( -2, "\t-c       : toggle using several cuts at each node [default = %s]\n",                      pPars->fMoreCuts? "yes": "no" );
    Abc_Print( -2, "\t-d       : toggle additional search for good divisors [default = %s]\n",                  pPars->fFindDivs? "yes": "no" );
    Abc_Print( -2, "\t-p       : toggle optimizing critical path only [default = %s]\n",                        pPars->fUsePath? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",                        pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w       : toggle printing detailed stats for each node [default = %s]\n",                pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9DeepSyn( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManDeepSyn( Gia_Man_t * pGia, int nIters, int nNoImpr, int TimeOut, int nAnds, int Seed, int fUseTwo, int fVerbose );
    Gia_Man_t * pTemp; int c, nIters = 1, nNoImpr = ABC_INFINITY, TimeOut = 0, nAnds = 0, Seed = 0, fUseTwo = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "IJTAStvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIters < 0 )
                goto usage;
            break;
        case 'J':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-J\" should be followed by an integer.\n" );
                goto usage;
            }
            nNoImpr = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNoImpr < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeOut < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            nAnds = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nAnds < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            Seed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Seed < 0 )
                goto usage;
            break;
        case 't':
            fUseTwo ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9DeepSyn(): There is no AIG.\n" );
        return 0;
    }
    pTemp = Gia_ManDeepSyn( pAbc->pGia, nIters, nNoImpr, TimeOut, nAnds, Seed, fUseTwo, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &deepsyn [-IJTAS <num>] [-tvh]\n" );
    Abc_Print( -2, "\t           performs synthesis\n" );
    Abc_Print( -2, "\t-I <num> : the number of iterations [default = %d]\n",                   nIters  );
    Abc_Print( -2, "\t-J <num> : the number of steps without improvements [default = %d]\n",   nNoImpr  );
    Abc_Print( -2, "\t-T <num> : the timeout in seconds (0 = no timeout) [default = %d]\n",    TimeOut );
    Abc_Print( -2, "\t-A <num> : the number of nodes to stop (0 = no limit) [default = %d]\n", nAnds   );
    Abc_Print( -2, "\t-S <num> : user-specified random seed (0 <= num <= 100) [default = %d]\n", Seed  );
    Abc_Print( -2, "\t-t       : toggle using two-input LUTs [default = %s]\n",                fUseTwo? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",       fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9SatSyn( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Gia_ManSyn( Gia_Man_t * p, int nNodes, int nOuts, int TimeOut, int fUseXor, int fFancy, int fVerbose );
    Gia_Man_t * pTemp; int c, nNodes = 0, nOuts = 0, TimeOut = 0, fUseXor = 0, fFancy = 0, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NTafvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nNodes = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nNodes < 0 )
                goto usage;
            break;
        case 'O':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-O\" should be followed by an integer.\n" );
                goto usage;
            }
            nOuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nOuts < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeOut < 0 )
                goto usage;
            break;
        case 'a':
            fUseXor ^= 1;
            break;
        case 'f':
            fFancy ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9SatSyn(): There is no AIG.\n" );
        return 0;
    }
    pTemp = Gia_ManSyn( pAbc->pGia, nNodes, nOuts, TimeOut, fUseXor, fFancy, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &satsyn [-NOT <num>] [-afvh]\n" );
    Abc_Print( -2, "\t           performs synthesis\n" );
    Abc_Print( -2, "\t-N <num> : the number of window nodes [default = %d]\n",                 nNodes  );
    Abc_Print( -2, "\t-O <num> : the number of window outputs [default = %d]\n",               nOuts  );
    Abc_Print( -2, "\t-T <num> : the timeout in seconds (0 = no timeout) [default = %d]\n",    TimeOut );
    Abc_Print( -2, "\t-a       : toggle using xor-nodes [default = %s]\n",                     fUseXor? "yes": "no" );
    Abc_Print( -2, "\t-f       : toggle using additional feature [default = %s]\n",            fFancy? "yes": "no" );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",       fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9StochSyn( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManStochSyn( int nMaxSize, int nIters, int TimeOut, int Seed, int fVerbose, char * pScript );
    int c, nMaxSize = 1000, nIters = 10, TimeOut = 0, Seed = 0, fVerbose = 0; char * pScript;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "NITSvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nMaxSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nMaxSize < 0 )
                goto usage;
            break;
        case 'I':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
                goto usage;
            }
            nIters = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nIters < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            TimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( TimeOut < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            Seed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Seed < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9StochSyn(): There is no AIG.\n" );
        return 0;
    }
    if ( argc != globalUtilOptind + 1 )
    {
        printf( "Expecting a synthesis script in quotes on the command line (for example: \"&st; &dch; &if\").\n" );
        goto usage;
    }
    pScript = Abc_UtilStrsav( argv[globalUtilOptind] );
    Gia_ManStochSyn( nMaxSize, nIters, TimeOut, Seed, fVerbose, pScript );
    ABC_FREE( pScript );
    return 0;

usage:
    Abc_Print( -2, "usage: &stochsyn [-NITS <num>] [-tvh] <script>\n" );
    Abc_Print( -2, "\t           performs stochastic synthesis\n" );
    Abc_Print( -2, "\t-N <num> : the max partition size (in AIG nodes or LUTs) [default = %d]\n", nMaxSize );
    Abc_Print( -2, "\t-I <num> : the number of iterations [default = %d]\n",                   nIters  );
    Abc_Print( -2, "\t-T <num> : the timeout in seconds (0 = no timeout) [default = %d]\n",    TimeOut );
    Abc_Print( -2, "\t-S <num> : user-specified random seed (0 <= num <= 100) [default = %d]\n", Seed  );
    Abc_Print( -2, "\t-v       : toggle printing optimization summary [default = %s]\n",       fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h       : print the command usage\n");
    Abc_Print( -2, "\t<script> : synthesis script to use for each partition\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9CexCut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    return -1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9CexMerge( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abc_Cex_t * pCexNew;
    int c;
    int iFrStart = 0;
    int iFrStop  = ABC_INFINITY;
    int fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FGvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrStart < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrStop = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrStop < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            Abc_Print( -2, "Unknown switch.\n");
            goto usage;
        }
    }

    if ( pAbc->pCex == NULL )
    {
        Abc_Print( 1, "There is no current cex.\n");
        return 0;
    }
    if ( pAbc->pCex2 == NULL )
    {
        Abc_Print( 1, "There is no saved cex.\n");
        return 0;
    }
    if ( iFrStop - iFrStart < pAbc->pCex->iFrame )
    {
        Abc_Print( 1, "Current CEX does not allow to shorten the saved CEX.\n");
        return 0;
    }
    pCexNew = Abc_CexMerge( pAbc->pCex2, pAbc->pCex, iFrStart, iFrStop );
    if ( pCexNew == NULL )
    {
        Abc_Print( 1, "Merging CEXes has failed.\n");
        return 0;
    }
    // replace the saved CEX
    ABC_FREE( pAbc->pCex2 );
    pAbc->pCex2 = pCexNew;
    return 0;

usage:
    Abc_Print( -2, "usage: &cexmerge [-FG num] [-vh]\n" );
    Abc_Print( -2, "\t         merges the current CEX into the saved one\n" );
    Abc_Print( -2, "\t         and sets the resulting CEX as the saved one\n" );
    Abc_Print( -2, "\t-F num : 0-based number of the starting frame [default = %d]\n", iFrStart );
    Abc_Print( -2, "\t-G num : 0-based number of the ending frame [default = %d]\n",   iFrStop );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9CexMin( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Abc_Cex_t * Gia_ManCexMin( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrameStart, int nRealPis, int fJustMax, int fUseAll, int fVerbose );
    Abc_Cex_t * pCexNew;
    int iFrameStart = 0;
    int nRealPis = -1;
    int fJustMax = 1;
    int fUseAll = 0;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FNjavh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrameStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrameStart < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nRealPis = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nRealPis < 0 )
                goto usage;
            break;
        case 'j':
            fJustMax ^= 1;
            break;
        case 'a':
            fUseAll ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9CexMin(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "Abc_CommandAbc9CexMin(): The network is combinational.\n" );
        return 0;
    }
    if ( pAbc->pCex == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9CexMin(): There is no counter-example.\n" );
        return 1;
    }
    pCexNew = Gia_ManCexMin( pAbc->pGia, pAbc->pCex, iFrameStart, nRealPis, fJustMax, fUseAll, fVerbose );
    if ( pCexNew )
        Abc_FrameReplaceCex( pAbc, &pCexNew );
    return 0;

usage:
    Abc_Print( -2, "usage: &cexmin [-FN num] [-javh]\n" );
    Abc_Print( -2, "\t         minimizes a deep counter-example\n" );
    Abc_Print( -2, "\t-F num : starting timeframe for minimization [default = %d]\n", iFrameStart );
    Abc_Print( -2, "\t-N num : the number of real primary inputs [default = %d]\n", nRealPis );
    Abc_Print( -2, "\t-j     : toggle computing all justifying assignments [default = %s]\n", fJustMax? "yes": "no" );
    Abc_Print( -2, "\t-a     : toggle using all terminal objects [default = %s]\n", fUseAll? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9AbsCreate( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    //Gia_Man_t * pTemp = NULL;
    char * pStr, * pFlopNum;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9AbsCreate(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( pAbc->pGia->vFlopClasses != NULL )
    {
        Abc_Print( -1, "Abstraction flop map is already defined.\n" );
        return 0;
    }
    pAbc->pGia->vFlopClasses = Vec_IntStart( Gia_ManRegNum(pAbc->pGia) );
    // read the flop list
    if ( argc != globalUtilOptind + 1 )
    {
        Abc_Print( -1, "Flop list should be specified on the command line.\n" );
        return 0;
    }
    pStr = argv[globalUtilOptind];
    // parse flop list
    pFlopNum = strtok( pStr, " ," );
    while ( pFlopNum )
    {
        int iFlop = atoi(pFlopNum);
        assert( iFlop >= 0 && iFlop < Gia_ManRegNum(pAbc->pGia) );
        Vec_IntWriteEntry( pAbc->pGia->vFlopClasses, iFlop, 1 );
        pFlopNum = strtok( NULL, " ," );
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &abs_create [-vh] <comma-separated_list_of_zero-based_flop_ids>\n" );
    Abc_Print( -2, "\t        creates new flop map by reading user's input\n" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9AbsDerive( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp = NULL;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9AbsDerive(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( pAbc->pGia->vFlopClasses == NULL )
    {
        Abc_Print( -1, "Abstraction flop map is missing.\n" );
        return 0;
    }
    pTemp = Gia_ManDupAbsFlops( pAbc->pGia, pAbc->pGia->vFlopClasses );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &abs_derive [-vh]\n" );
    Abc_Print( -2, "\t        derives abstracted model using the pre-computed flop map\n" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9AbsRefine( Abc_Frame_t * pAbc, int argc, char ** argv )
{
//    Gia_Man_t * pTemp = NULL;
    int c;
    int nFfToAddMax = 0;
    int fTryFour    = 1;
    int fSensePath  = 0;
    int fVerbose    = 0;

    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Mtsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            nFfToAddMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFfToAddMax < 0 )
                goto usage;
            break;
        case 't':
            fTryFour ^= 1;
            break;
        case 's':
            fSensePath ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9AbsRefine(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( pAbc->pCex == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9AbsRefine(): There is no counter-example.\n" );
        return 1;
    }
    pAbc->Status = Gia_ManCexAbstractionRefine( pAbc->pGia, pAbc->pCex, nFfToAddMax, fTryFour, fSensePath, fVerbose );
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &abs_refine [-M <num>] [-tsvh]\n" );
    Abc_Print( -2, "\t         refines the pre-computed flop map using the counter-example\n" );
    Abc_Print( -2, "\t-M num : the max number of flops to add (0 = not used) [default = %d]\n", nFfToAddMax );
    Abc_Print( -2, "\t-t     : toggle trying four abstractions instead of one [default = %s]\n", fTryFour? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle using the path sensitization algorithm [default = %s]\n", fSensePath? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9GlaDerive( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Gia_Man_t * pTemp = NULL;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GlaDerive(): There is no AIG.\n" );
        return 1;
    }
/*
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
*/
    if ( pAbc->fBatchMode && (pAbc->Status == 0 || pAbc->Status == 1) ) 
    { 
        Abc_Print( 1, "The miters is already solved; skipping the command.\n" ); 
        return 0;
    }
    if ( pAbc->pGia->vGateClasses == NULL )
    {
        Abc_Print( -1, "Abstraction gate map is missing.\n" );
        return 0;
    }
    pTemp = Gia_ManDupAbsGates( pAbc->pGia, pAbc->pGia->vGateClasses );
    Gia_ManStop( pTemp );
    pTemp = Gia_ManDupAbsGates( pAbc->pGia, pAbc->pGia->vGateClasses );
    Abc_FrameUpdateGia( pAbc, pTemp );
//    Abc_Print( 1,"This command is currently not enabled.\n" );
    return 0;

usage:
    Abc_Print( -2, "usage: &gla_derive [-vh]\n" );
    Abc_Print( -2, "\t        derives abstracted model using the pre-computed gate map\n" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9GlaRefine( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern int Gia_ManNewRefine( Gia_Man_t * p, Abc_Cex_t * pCex, int iFrameStart, int iFrameExtra, int fVerbose );
    int iFrameStart = 0;
    int iFrameExtra = 0;
    int fMinCut = 1;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FGmvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrameStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrameStart < 0 )
                goto usage;
            break;
        case 'G':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-G\" should be followed by an integer.\n" );
                goto usage;
            }
            iFrameExtra = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( iFrameExtra < 0 )
                goto usage;
            break;
        case 'm':
            fMinCut ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GlaRefine(): There is no AIG.\n" );
        return 1;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( pAbc->pCex == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GlaRefine(): There is no counter-example.\n" );
        return 1;
    }
    pAbc->Status = Gia_ManNewRefine( pAbc->pGia, pAbc->pCex, iFrameStart, iFrameExtra, fVerbose );
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &gla_refine [-FG num] [-vh]\n" );
    Abc_Print( -2, "\t         refines the pre-computed gate map using the counter-example\n" );
    Abc_Print( -2, "\t-F num : starting timeframe for suffix refinement [default = %d]\n", iFrameStart );
    Abc_Print( -2, "\t-G num : the number of additional timeframes to try [default = %d]\n", iFrameExtra );
//    Abc_Print( -2, "\t-m     : toggle using min-cut to derive the refinements [default = %s]\n", fMinCut? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9GlaShrink( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int fUsePdr = 0;
    int fUseSat = 1;
    int fUseBdd = 0;
    int nFrameMax = 0;
    int nTimeOut = 0;
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FTpsbvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrameMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrameMax < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nTimeOut < 0 )
                goto usage;
            break;
        case 'p':
            fUsePdr ^= 1;
            break;
        case 's':
            fUseSat ^= 1;
            break;
        case 'b':
            fUseBdd ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GlaShrink(): There is no AIG.\n" );
        return 1;
    }
    if ( pAbc->pGia->vGateClasses == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9GlaShrink(): There is no gate-level abstraction.\n" );
        return 0;
    }
    Gia_ManShrinkGla( pAbc->pGia, nFrameMax, nTimeOut, fUsePdr, fUseSat, fUseBdd, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &gla_shrink [-FT num] [-psbvh]\n" );
    Abc_Print( -2, "\t         shrinks the abstraction by removing redundant objects\n" );
    Abc_Print( -2, "\t-F num : the maximum timeframe to check to [default = %d]\n", nFrameMax );
    Abc_Print( -2, "\t-T num : the timeout per call, in seconds [default = %d]\n", nTimeOut );
    Abc_Print( -2, "\t-p     : toggle using PDR for checking [default = %s]\n", fUsePdr? "yes": "no" );
    Abc_Print( -2, "\t-s     : toggle using BMC for checking [default = %s]\n", fUseSat? "yes": "no" );
    Abc_Print( -2, "\t-b     : toggle using BDDs for checking [default = %s]\n", fUseBdd? "yes": "no" );
    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h     : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Gla( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abs_Par_t Pars, * pPars = &Pars;
    int c, fNewAlgo = 1;
    char * pLogFileName = NULL;
    Abs_ParSetDefaults( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FSCMDETRQPBALtfardmnscbpquwvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesMax < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesStart < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfLimit < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedStart < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedDelta < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedPerce = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedPerce < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRatioMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRatioMin < 0 )
                goto usage;
            break;
        case 'Q':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-Q\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRatioMin2 = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRatioMin2 < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRatioMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRatioMax < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesNoChangeLim = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesNoChangeLim < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a file name.\n" );
                goto usage;
            }
            pPars->pFileVabs = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
                goto usage;
            }
            pLogFileName = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 't':
            pPars->fUseTermVars ^= 1;
            break;
        case 'f':
            pPars->fPropFanout ^= 1;
            break;
        case 'a':
            pPars->fAddLayer ^= 1;
            break;
        case 'r':
            pPars->fNewRefine ^= 1;
            break;
        case 'd':
            pPars->fDumpVabs ^= 1;
            break;
        case 'm':
            pPars->fDumpMabs ^= 1;
            break;
        case 'n':
            fNewAlgo ^= 1;
            break;
        case 's':
            pPars->fUseSkip ^= 1;
            break;
        case 'c':
            pPars->fUseSimple ^= 1;
            break;
        case 'b':
            pPars->fSkipHash ^= 1;
            break;
        case 'p':
            pPars->fUseFullProof ^= 1;
            break;
        case 'q':
            pPars->fCallProver ^= 1;
            break;
        case 'u':
            pPars->fSimpProver ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'w':
            pPars->fVeryVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "There is no AIG.\n" );
        return 0;
    }
/*
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
*/
    if ( pPars->nFramesMax < 0 )
    {
        Abc_Print( 1, "The number of starting frames should be a positive integer.\n" );
        return 0;
    }
    if ( pPars->nFramesMax && pPars->nFramesStart > pPars->nFramesMax )
    {
        Abc_Print( 1, "The starting frame is larger than the max number of frames.\n" );
        return 0;
    }
    if ( Gia_ManPoNum(pAbc->pGia) == 1 )
    {
        if ( fNewAlgo )
            pAbc->Status = Gia_ManPerformGla( pAbc->pGia, pPars );
        else
            pAbc->Status  = Gia_ManPerformGlaOld( pAbc->pGia, pPars, 0 );
        pAbc->nFrames = pPars->iFrame;
        Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
        if ( pLogFileName )
            Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "&gla" );
    }
    else // iterate over outputs
    {
        Gia_Obj_t * pObj; int o, Status;
        Vec_Ptr_t * vSeqModelVec = Vec_PtrStart( Gia_ManPoNum(pAbc->pGia) );
        Vec_Int_t * vStatuses = Vec_IntAlloc( Gia_ManPoNum(pAbc->pGia) );
        Gia_ManForEachPo( pAbc->pGia, pObj, o )
        {
            Gia_Man_t * pOne = Gia_ManDupDfsOnePo( pAbc->pGia, o );
            if ( fNewAlgo )
                Status = Gia_ManPerformGla( pOne, pPars );
            else
                Status = Gia_ManPerformGlaOld( pOne, pPars, 0 );
            Vec_IntPush( vStatuses, Status );
            if ( pLogFileName )
                Abc_NtkWriteLogFile( pLogFileName, pOne->pCexSeq, Status, pPars->iFrame, "&gla" );
            if ( pOne->pCexSeq )
                Vec_PtrWriteEntry( vSeqModelVec, o, pOne->pCexSeq );
            pOne->pCexSeq = NULL;
            Gia_ManStop( pOne );
        }
        assert( Vec_IntSize(vStatuses) == Gia_ManPoNum(pAbc->pGia) );
        Abc_FrameReplaceCexVec( pAbc, &vSeqModelVec );
        Abc_FrameReplacePoStatuses( pAbc, &vStatuses );
        pAbc->nFrames = -1;
    }
    return 0;

usage:
    Abc_Print( -2, "usage: &gla [-FSCMDETRQPB num] [-AL file] [-fardmnscbpquwvh]\n" );
    Abc_Print( -2, "\t          fixed-time-frame gate-level proof- and cex-based abstraction\n" );
    Abc_Print( -2, "\t-F num  : the max number of timeframes to unroll [default = %d]\n", pPars->nFramesMax );
    Abc_Print( -2, "\t-S num  : the starting time frame (0=unused) [default = %d]\n", pPars->nFramesStart );
    Abc_Print( -2, "\t-C num  : the max number of SAT solver conflicts (0=unused) [default = %d]\n", pPars->nConfLimit );
    Abc_Print( -2, "\t-M num  : the max number of learned clauses to keep (0=unused) [default = %d]\n", pPars->nLearnedStart );
    Abc_Print( -2, "\t-D num  : delta value for learned clause removal [default = %d]\n", pPars->nLearnedDelta );
    Abc_Print( -2, "\t-E num  : ratio percentage for learned clause removal [default = %d]\n", pPars->nLearnedPerce );
    Abc_Print( -2, "\t-T num  : an approximate timeout, in seconds [default = %d]\n", pPars->nTimeOut );
    Abc_Print( -2, "\t-R num  : stop when abstraction size exceeds num %% (0<=num<=100) [default = %d]\n", pPars->nRatioMin );
    Abc_Print( -2, "\t-Q num  : stop when abstraction size exceeds num %% during refinement (0<=num<=100) [default = %d]\n", pPars->nRatioMin2 );
    Abc_Print( -2, "\t-P num  : maximum percentage of added objects before a restart (0<=num<=100) [default = %d]\n", pPars->nRatioMax );
    Abc_Print( -2, "\t-B num  : the number of stable frames to call prover or dump abstraction [default = %d]\n", pPars->nFramesNoChangeLim );
    Abc_Print( -2, "\t-A file : file name for dumping abstrated model (&gla -d) or abstraction map (&gla -m)\n" );
    Abc_Print( -2, "\t-L file : the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
    Abc_Print( -2, "\t-f      : toggle propagating fanout implications [default = %s]\n", pPars->fPropFanout? "yes": "no" );
    Abc_Print( -2, "\t-a      : toggle refinement by adding one layers of gates [default = %s]\n", pPars->fAddLayer? "yes": "no" );
    Abc_Print( -2, "\t-r      : toggle using improved refinement heuristics [default = %s]\n", pPars->fNewRefine? "yes": "no" );
    Abc_Print( -2, "\t-d      : toggle dumping abstracted model into a file [default = %s]\n", pPars->fDumpVabs? "yes": "no" );
    Abc_Print( -2, "\t-m      : toggle dumping abstraction map into a file [default = %s]\n", pPars->fDumpMabs? "yes": "no" );
    Abc_Print( -2, "\t-n      : toggle using new algorithms [default = %s]\n", fNewAlgo? "yes": "no" );
    Abc_Print( -2, "\t-s      : toggle skipping previously proved timeframes [default = %s]\n", pPars->fUseSkip? "yes": "no" );
    Abc_Print( -2, "\t-c      : toggle using naive (2-input AND node) CNF encoding [default = %s]\n", pPars->fUseSimple? "yes": "no" );
    Abc_Print( -2, "\t-b      : toggle CNF construction without hashing [default = %s]\n", pPars->fSkipHash? "yes": "no" );
    Abc_Print( -2, "\t-p      : toggle using full-proof for UNSAT cores [default = %s]\n", pPars->fUseFullProof? "yes": "no" );
    Abc_Print( -2, "\t-q      : toggle calling the prover [default = %s]\n", pPars->fCallProver? "yes": "no" );
    Abc_Print( -2, "\t-u      : toggle enabling simplifation before calling the prover [default = %s]\n", pPars->fSimpProver? "yes": "no" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-w      : toggle printing more verbose information [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Vta( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    Abs_Par_t Pars, * pPars = &Pars;
    int c;
    Abs_ParSetDefaults( pPars );
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "FSPCLDETRAtradvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesMax = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesMax < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesStart < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nFramesPast = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nFramesPast < 0 )
                goto usage;
            break;
        case 'C':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-C\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nConfLimit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nConfLimit < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedStart = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedStart < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedDelta = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedDelta < 0 )
                goto usage;
            break;
        case 'E':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-E\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nLearnedPerce = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nLearnedPerce < 0 )
                goto usage;
            break;
        case 'T':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nTimeOut = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nTimeOut < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            pPars->nRatioMin = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( pPars->nRatioMin < 0 )
                goto usage;
            break;
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by a file name.\n" );
                goto usage;
            }
            pPars->pFileVabs = argv[globalUtilOptind];
            globalUtilOptind++;
            break;
        case 't':
            pPars->fUseTermVars ^= 1;
            break;
        case 'r':
            pPars->fUseRollback ^= 1;
            break;
        case 'a':
            pPars->fAddLayer ^= 1;
            break;
        case 'd':
            pPars->fDumpVabs ^= 1;
            break;
        case 'v':
            pPars->fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "There is no AIG.\n" );
        return 0;
    }
    if ( Gia_ManRegNum(pAbc->pGia) == 0 )
    {
        Abc_Print( -1, "The network is combinational.\n" );
        return 0;
    }
    if ( Gia_ManPoNum(pAbc->pGia) > 1 )
    {
        Abc_Print( 1, "The network is more than one PO (run \"orpos\").\n" );
        return 0;
    }
    if ( pPars->nFramesMax < 0 )
    {
        Abc_Print( 1, "The number of starting frames should be a positive integer.\n" );
        return 0;
    }
    if ( pPars->nFramesMax && pPars->nFramesStart > pPars->nFramesMax )
    {
        Abc_Print( 1, "The starting frame is larger than the max number of frames.\n" );
        return 0;
    }
    pAbc->Status  = Gia_VtaPerform( pAbc->pGia, pPars );
    pAbc->nFrames = pPars->iFrame;
    Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexSeq );
    return 0;

usage:
    Abc_Print( -2, "usage: &vta [-FSPCLDETR num] [-A file] [-tradvh]\n" );
    Abc_Print( -2, "\t          variable-time-frame gate-level proof- and cex-based abstraction\n" );
    Abc_Print( -2, "\t-F num  : the max number of timeframes to unroll [default = %d]\n", pPars->nFramesMax );
    Abc_Print( -2, "\t-S num  : the starting time frame (0=unused) [default = %d]\n", pPars->nFramesStart );
    Abc_Print( -2, "\t-P num  : the number of previous frames for UNSAT core [default = %d]\n", pPars->nFramesPast );
    Abc_Print( -2, "\t-C num  : the max number of SAT solver conflicts (0=unused) [default = %d]\n", pPars->nConfLimit );
    Abc_Print( -2, "\t-L num  : the max number of learned clauses to keep (0=unused) [default = %d]\n", pPars->nLearnedStart );
    Abc_Print( -2, "\t-D num  : delta value for learned clause removal [default = %d]\n", pPars->nLearnedDelta );
    Abc_Print( -2, "\t-E num  : ratio percentage for learned clause removal [default = %d]\n", pPars->nLearnedPerce );
    Abc_Print( -2, "\t-T num  : an approximate timeout, in seconds [default = %d]\n", pPars->nTimeOut );
    Abc_Print( -2, "\t-R num  : minimum percentage of abstracted objects (0<=num<=100) [default = %d]\n", pPars->nRatioMin );
    Abc_Print( -2, "\t-A file : file name for dumping abstrated model [default = \"vabs.aig\"]\n" );
    Abc_Print( -2, "\t-t      : toggle using terminal variables [default = %s]\n", pPars->fUseTermVars? "yes": "no" );
    Abc_Print( -2, "\t-r      : toggle using rollback after the starting frames [default = %s]\n", pPars->fUseRollback? "yes": "no" );
    Abc_Print( -2, "\t-a      : toggle refinement by adding one layers of gates [default = %s]\n", pPars->fAddLayer? "yes": "no" );
    Abc_Print( -2, "\t-d      : toggle dumping abstracted model into a file [default = %s]\n", pPars->fDumpVabs? "yes": "no" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Vta2Gla( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Vta2Gla(): There is no AIG.\n" );
        return 0;
    }
    if ( pAbc->pGia->vObjClasses == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Vta2Gla(): There is no variable-time-frame abstraction is defined.\n" );
        return 0;
    }
    Vec_IntFreeP( &pAbc->pGia->vGateClasses );
    pAbc->pGia->vGateClasses = Gia_VtaConvertToGla( pAbc->pGia, pAbc->pGia->vObjClasses );
    Vec_IntFreeP( &pAbc->pGia->vObjClasses );
    return 0;

usage:
    Abc_Print( -2, "usage: &vta_gla [-vh]\n" );
    Abc_Print( -2, "\t        maps variable- into fixed-time-frame gate-level abstraction\n" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Gla2Vta( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fVerbose = 0;
    int nFrames = pAbc->nFrames;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "Fvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Gla2Vta(): There is no AIG.\n" );
        return 0;
    }
    if ( pAbc->pGia->vGateClasses == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Gla2Vta(): There is no gate-level abstraction is defined.\n" );
        return 0;
    }
    if ( pAbc->nFrames < 1 )
    {
        Abc_Print( -1, "Abc_CommandAbc9Gla2Vta(): The number of timeframes (%d) should be a positive integer.\n", nFrames );
        return 0;
    }
    Vec_IntFreeP( &pAbc->pGia->vObjClasses );
    pAbc->pGia->vObjClasses = Gia_VtaConvertFromGla( pAbc->pGia, pAbc->pGia->vGateClasses, nFrames );
    Vec_IntFreeP( &pAbc->pGia->vGateClasses );
    return 0;

usage:
    Abc_Print( -2, "usage: &gla_vta [-F num] [-vh]\n" );
    Abc_Print( -2, "\t          maps fixed- into variable-time-frame gate-level abstraction\n" );
    Abc_Print( -2, "\t-F num  : timeframes in the resulting variable-time-frame abstraction [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Fla2Gla( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Fla2Gla(): There is no AIG.\n" );
        return 0;
    }
    if ( pAbc->pGia->vFlopClasses == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Fla2Gla(): There is no gate-level abstraction is defined.\n" );
        return 0;
    }
    Vec_IntFreeP( &pAbc->pGia->vGateClasses );
    pAbc->pGia->vGateClasses = Gia_FlaConvertToGla( pAbc->pGia, pAbc->pGia->vFlopClasses );
    Vec_IntFreeP( &pAbc->pGia->vFlopClasses );
    return 0;

usage:
    Abc_Print( -2, "usage: &fla_gla [-vh]\n" );
    Abc_Print( -2, "\t          maps flop-level into gate-level abstraction\n" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Gla2Fla( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int c, fVerbose = 0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Gla2Fla(): There is no AIG.\n" );
        return 0;
    }
    if ( pAbc->pGia->vGateClasses == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Gla2Fla(): There is no gate-level abstraction is defined.\n" );
        return 0;
    }
    Vec_IntFreeP( &pAbc->pGia->vFlopClasses );
    pAbc->pGia->vFlopClasses = Gia_GlaConvertToFla( pAbc->pGia, pAbc->pGia->vGateClasses );
    Vec_IntFreeP( &pAbc->pGia->vGateClasses );
    return 0;

usage:
    Abc_Print( -2, "usage: &gla_fla [-vh]\n" );
    Abc_Print( -2, "\t          maps gate-level into flop-level abstraction\n" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Gen( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern Gia_Man_t * Extra_CommandGen( int Algo, int LutSize, int nLuts, int nLevels, int Limit, int nBestTries, int Multi, int fXor, int fVerbose );
    Gia_Man_t * pTemp = NULL;
    int Algo        =   0;
    int LutSize     =   6;
    int nLuts       = 256;
    int nLevels     =   8;
    int Limit       =   0;
    int nBestTries  =   1;
    int Multi       =   0;
    int fXor        =   1;
    int c, fVerbose =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "AKNDLBMxvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            Algo = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Algo < 0 )
                goto usage;
            break;
        case 'K':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
                goto usage;
            }
            LutSize = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( LutSize < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            nLuts = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLuts < 0 )
                goto usage;
            break;
        case 'D':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-D\" should be followed by an integer.\n" );
                goto usage;
            }
            nLevels = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nLevels < 0 )
                goto usage;
            break;
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            Limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Limit < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            nBestTries = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nBestTries < 0 )
                goto usage;
            break;
        case 'M':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                goto usage;
            }
            Multi = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Multi < 0 )
                goto usage;
            break;
        case 'x':
            fXor ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    pTemp = Extra_CommandGen( Algo, LutSize, nLuts, nLevels, Limit, nBestTries, Multi, fXor, fVerbose );
    Abc_FrameUpdateGia( pAbc, pTemp );
    return 0;

usage:
    Abc_Print( -2, "usage: &gen [-AKNDLBMxvh]\n" );
    Abc_Print( -2, "\t          generates network\n" );
    Abc_Print( -2, "\t-A num  : the generation algorithm [default = %d]\n",                 Algo );
    Abc_Print( -2, "\t-K num  : the number of LUT inputs [default = %d]\n",                 LutSize );
    Abc_Print( -2, "\t-N num  : the number of LUTs on one level [default = %d]\n",          nLuts );
    Abc_Print( -2, "\t-D num  : the number of LUT levels [default = %d]\n",                 nLevels );
    Abc_Print( -2, "\t-L num  : limit below which we randomize [default = %d]\n",           Limit );
    Abc_Print( -2, "\t-B num  : select best fanins among this many tries [default = %d]\n", nBestTries );
    Abc_Print( -2, "\t-M num  : the multiplier type (1=array, 2=booth) [default = %d]\n",   Multi );
    Abc_Print( -2, "\t-x      : toggle using XOR gates [default = %s]\n",                   fXor? "yes": "no" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n",      fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Cfs( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Extra_CommandCfs( Gia_Man_t * pGia, int Limit, int Reps, int UnseenUse, int RareUse, int fReplaceRare, int fConstSim, int fDagNodes, float FlipProb, int fVerbose );
    int Limit       =   0;
    int Reps        =   1;
    int UnseenUse   =   2;
    int RareUse     =   2;
    int fReplaceRare=   0;
    int fConstSim   =   0;
    int fDagNodes   =   0;
    float FlipProb  =   0;
    int c, fVerbose =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "LNURPrcdvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'L':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-L\" should be followed by an integer.\n" );
                goto usage;
            }
            Limit = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Limit < 0 )
                goto usage;
            break;
        case 'N':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
                goto usage;
            }
            Reps = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Reps < 0 )
                goto usage;
            break;
        case 'U':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-U\" should be followed by an integer.\n" );
                goto usage;
            }
            UnseenUse = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( UnseenUse < 0 )
                goto usage;
            break;
        case 'R':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-R\" should be followed by an integer.\n" );
                goto usage;
            }
            RareUse = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( RareUse < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            FlipProb = atof(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( FlipProb < 0 )
                goto usage;
            break;
        case 'r':
            fReplaceRare ^= 1;
            break;
        case 'c':
            fConstSim ^= 1;
            break;
        case 'd':
            fDagNodes ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Cfs(): There is no AIG.\n" );
        return 1;
    }
    Extra_CommandCfs( pAbc->pGia, Limit, Reps, UnseenUse, RareUse, fReplaceRare, fConstSim, fDagNodes, FlipProb, fVerbose );
    return 0;

usage:
    Abc_Print( -2, "usage: &cfs [-LNURPrcdvh]\n" );
    Abc_Print( -2, "\t          performs simulation\n" );
    Abc_Print( -2, "\t-L num  : the limit on the number of occurrences [default = %d]\n",  Limit );
    Abc_Print( -2, "\t-N num  : the number of repetions of each pattern [default = %d]\n", Reps );
    Abc_Print( -2, "\t-U num  : what to do with unseen patterns [default = %d]\n",         UnseenUse );
    Abc_Print( -2, "\t-R num  : what to do with rare patterns [default = %d]\n",           RareUse );
    Abc_Print( -2, "\t-P num  : base2-log of ramdom flip probability [default = %f]\n",    FlipProb );
    Abc_Print( -2, "\t-r      : toggle replacing rare patterns [default = %s]\n",          fReplaceRare? "yes": "no" );
    Abc_Print( -2, "\t-c      : toggle inserting constants [default = %s]\n",              fConstSim? "yes": "no" );
    Abc_Print( -2, "\t-d      : toggle using only DAG nodes [default = %s]\n",             fDagNodes? "yes": "no" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n",     fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9ProdAdd( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    int nArgA       =   4;
    int nArgB       =   4;
    int Seed        =   0;
    int fSigned     =   0;
    int fCla        =   0;
    int c, fVerbose =   0;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "ABSscvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'A':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-A\" should be followed by an integer.\n" );
                goto usage;
            }
            nArgA = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nArgA < 0 )
                goto usage;
            break;
        case 'B':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
                goto usage;
            }
            nArgB = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nArgB < 0 )
                goto usage;
            break;
        case 'S':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
                goto usage;
            }
            Seed = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( Seed < 0 )
                goto usage;
            break;
        case 's':
            fSigned ^= 1;
            break;
        case 'c':
            fCla ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    Gia_ManProdAdderGen( nArgA, nArgB, Seed, fSigned, fCla );
    return 0;

usage:
    Abc_Print( -2, "usage: &prodadd [-ABSscvh]\n" );
    Abc_Print( -2, "\t          generates partial products and adder trees\n" );
    Abc_Print( -2, "\t-A num  : the bit-width of the first arg [default = %d]\n",           nArgA );
    Abc_Print( -2, "\t-B num  : the bit-width of the second arg [default = %d]\n",          nArgB );
    Abc_Print( -2, "\t-S num  : random seed used the node ordering [default = %d]\n",       Seed );
    Abc_Print( -2, "\t-s      : toggle using signed operation [default = %s]\n",            fSigned? "yes": "no" );
    Abc_Print( -2, "\t-c      : toggle using CLA in the adder tree [default = %s]\n",       fCla? "yes": "no" );
    Abc_Print( -2, "\t-v      : toggle printing verbose information [default = %s]\n",      fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h      : print the command usage\n");
    return 1;
}


/**Function*************************************************************

  Synopsis    []

  Description []

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Abc_CommandAbc9Test( Abc_Frame_t * pAbc, int argc, char ** argv )
{
    extern void Gia_ManPrintArray( Gia_Man_t * p );
    extern Gia_Man_t * Gia_ManPerformNewResub( Gia_Man_t * p, int nWinCount, int nCutSize, int nProcs, int fVerbose );
    extern void Gia_RsbEnumerateWindows( Gia_Man_t * p, int nInputsMax, int nLevelsMax );
    extern int Gia_ManSumTotalOfSupportSizes( Gia_Man_t * p );
    extern void Abc_Tt6MinTest2( Gia_Man_t * p );
    int c, fVerbose = 0;
    int nFrames = 5;
    int fSwitch = 0;
    int nWords = 1000;
    int nProcs = 2;
    Extra_UtilGetoptReset();
    while ( ( c = Extra_UtilGetopt( argc, argv, "WPFsvh" ) ) != EOF )
    {
        switch ( c )
        {
        case 'W':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-W\" should be followed by an integer.\n" );
                goto usage;
            }
            nWords = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nWords < 0 )
                goto usage;
            break;
        case 'P':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-P\" should be followed by an integer.\n" );
                goto usage;
            }
            nProcs = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nProcs < 0 )
                goto usage;
            break;
        case 'F':
            if ( globalUtilOptind >= argc )
            {
                Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
                goto usage;
            }
            nFrames = atoi(argv[globalUtilOptind]);
            globalUtilOptind++;
            if ( nFrames < 0 )
                goto usage;
            break;
        case 's':
            fSwitch ^= 1;
            break;
        case 'v':
            fVerbose ^= 1;
            break;
        case 'h':
            goto usage;
        default:
            goto usage;
        }
    }
    if ( pAbc->pGia == NULL )
    {
        Abc_Print( -1, "Abc_CommandAbc9Test(): There is no AIG.\n" );
        return 1;
    }
    if ( argc == globalUtilOptind + 1 )
    {
        extern void Gia_ManUpdateCoPhase( Gia_Man_t * pNew, Gia_Man_t * pOld );
        Gia_Man_t * pTemp = Gia_AigerRead( argv[globalUtilOptind], 0, 0, 0 );
        Gia_ManUpdateCoPhase( pAbc->pGia, pTemp );
        Gia_ManStop( pTemp );
        return 0;
    }
    Abc_FrameUpdateGia( pAbc, Gia_ManPerformNewResub(pAbc->pGia, 100, 6, 1, 1) );
//    printf( "AIG in \"%s\" has the sum of output support sizes equal to %d.\n", pAbc->pGia->pSpec, Gia_ManSumTotalOfSupportSizes(pAbc->pGia) );
    return 0;
usage:
    Abc_Print( -2, "usage: &test [-FW num] [-svh]\n" );
    Abc_Print( -2, "\t        testing various procedures\n" );
    Abc_Print( -2, "\t-F num: the number of timeframes [default = %d]\n", nFrames );
    Abc_Print( -2, "\t-W num: the number of machine words [default = %d]\n", nWords );
    Abc_Print( -2, "\t-s    : toggle enable (yes) vs. disable (no) [default = %s]\n", fSwitch? "yes": "no" );
    Abc_Print( -2, "\t-v    : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
    Abc_Print( -2, "\t-h    : print the command usage\n");
    return 1;
}

////////////////////////////////////////////////////////////////////////
///                       END OF FILE                                ///
////////////////////////////////////////////////////////////////////////

#include "abciUnfold2.c"
ABC_NAMESPACE_IMPL_END
