SAT variable profiling.

src/base/abci/abc.c

@@ -21246,7 +21246,7 @@ int Abc_CommandBmc3( Abc_Frame_t * pAbc, int argc, char ** argv )
     int c;
     Saig_ParBmcSetDefaultParams( pPars );
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "SFTHGCDJILaxdruvzh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "SFTHGCDJIPQRLaxdruvzh" ) ) != EOF )
     {
         switch ( c )
         {
@@ -21349,6 +21349,39 @@ int Abc_CommandBmc3( Abc_Frame_t * pAbc, int argc, char ** argv )
             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 )
             {
@@ -21433,7 +21466,7 @@ int Abc_CommandBmc3( Abc_Frame_t * pAbc, int argc, char ** argv )
     return 0;
 
 usage:
-    Abc_Print( -2, "usage: bmc3 [-SFTHGCDJI num] [-L file] [-axduvzh]\n" );
+    Abc_Print( -2, "usage: bmc3 [-SFTHGCDJIPQR num] [-L file] [-axduvzh]\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 );
@@ -21444,6 +21477,9 @@ usage:
     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 : ratio percentage 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-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" );

src/sat/bmc/bmc.h

@@ -56,6 +56,9 @@ struct Saig_ParBmc_t_
     int         fDropSatOuts;   // replace sat outputs by constant 0
     int         nFfToAddMax;    // max number of flops to add during CBA
     int         fSkipRand;      // skip random decisions
+    int         nLearnedStart;  // starting learned clause limit
+    int         nLearnedDelta;  // delta of learned clause limit
+    int         nLearnedPerce;  // ratio of learned clause limit
     int         fVerbose;       // verbose 
     int         fNotVerbose;    // skip line-by-line print-out 
     int         iFrame;         // explored up to this frame

src/sat/bmc/bmcBmc3.c

@@ -1314,6 +1314,9 @@ void Saig_ParBmcSetDefaultParams( Saig_ParBmc_t * p )
     p->nPisAbstract   =     0;    // the number of PIs to abstract
     p->fSolveAll      =     0;    // stops on the first SAT instance
     p->fDropSatOuts   =     0;    // replace sat outputs by constant 0
+    p->nLearnedStart  = 10000;    // starting learned clause limit
+    p->nLearnedDelta  =  2000;    // delta of learned clause limit
+    p->nLearnedPerce  =    80;    // ratio of learned clause limit
     p->fVerbose       =     0;    // verbose 
     p->fNotVerbose    =     0;    // skip line-by-line print-out 
     p->iFrame         =    -1;    // explored up to this frame
@@ -1404,6 +1407,9 @@ int Saig_ManBmcScalable( Aig_Man_t * pAig, Saig_ParBmc_t * pPars )
     // create BMC manager
     p = Saig_Bmc3ManStart( pAig, pPars->nTimeOutOne );
     p->pPars = pPars;
+    p->pSat->nLearntStart = p->pPars->nLearnedStart;
+    p->pSat->nLearntDelta = p->pPars->nLearnedDelta;
+    p->pSat->nLearntRatio = p->pPars->nLearnedPerce;
     if ( pPars->fVerbose )
     {
         printf( "Running \"bmc3\". PI/PO/Reg = %d/%d/%d. And =%7d. Lev =%6d. ObjNums =%6d. Sect =%3d.\n", 
@@ -1636,9 +1642,9 @@ nTimeUndec += clock() - clk2;
             }
             printf( "%4d %s : ", f, fUnfinished ? "-" : "+" );
             printf( "Var =%8.0f. ", (double)p->nSatVars );
-            printf( "Var2 =%8.0f. ", (double)sat_solver_count_usedvars(p->pSat) );
+            printf( "Used =%8.0f. ", (double)sat_solver_count_usedvars(p->pSat) );
             printf( "Cla =%9.0f. ", (double)p->pSat->stats.clauses );
-            printf( "Cnf =%7.0f. ",(double)p->pSat->stats.conflicts );
+            printf( "Conf =%7.0f. ",(double)p->pSat->stats.conflicts );
 //            printf( "Imp =%10.0f. ", (double)p->pSat->stats.propagations );
             printf( "Uni =%7.0f. ",(double)sat_solver_count_assigned(p->pSat) );
             if ( pPars->fSolveAll )

src/sat/bsat/satClause.h

@@ -35,8 +35,8 @@ ABC_NAMESPACE_HEADER_START
 
 //#define LEARNT_MAX_START_DEFAULT  0
 #define LEARNT_MAX_START_DEFAULT  10000
-#define LEARNT_MAX_INCRE_DEFAULT   2000
-#define LEARNT_MAX_RATIO_DEFAULT     80
+#define LEARNT_MAX_INCRE_DEFAULT   1000
+#define LEARNT_MAX_RATIO_DEFAULT     50
 
 ////////////////////////////////////////////////////////////////////////
 ///                    STRUCTURE DEFINITIONS                         ///

src/sat/bsat/satSolver.c

@@ -1039,7 +1039,7 @@ void sat_solver_setnvars(sat_solver* s,int n)
         s->activity  = ABC_REALLOC(unsigned, s->activity, s->cap);
         s->activity2 = ABC_REALLOC(unsigned, s->activity2,s->cap);
 #endif
-        s->pFreqs    = ABC_REALLOC(char,   s->tags,     s->cap);
+        s->pFreqs    = ABC_REALLOC(char,   s->pFreqs,   s->cap);
 
         if ( s->factors )
         s->factors   = ABC_REALLOC(double, s->factors,  s->cap);
@@ -1331,7 +1331,7 @@ void sat_solver_reducedb(sat_solver* s)
 
     // report the results
     TimeTotal += clock() - clk;
-//    if ( s->fVerbose )
+    if ( s->fVerbose )
     {
     Abc_Print(1, "reduceDB: Keeping %7d out of %7d clauses (%5.2f %%)  ",
         s->stats.learnts, nLearnedOld, 100.0 * s->stats.learnts / nLearnedOld );