Adding a wrapper around clock() for more accurate time counting in ABC.

src/misc/util/abc_global.h

@@ -268,7 +268,7 @@ static inline int      Abc_Lit2LitL( int * pMap, int Lit )    { return Abc_LitNo
 
 
 // time counting
-typedef ABC_UINT64_T abctime;
+typedef ABC_INT64_T abctime;
 static inline abctime Abc_Clock()
 {
     static abctime PeriodNum = 0;

src/sat/bmc/bmcBmc3.c

@@ -1248,7 +1248,7 @@ abctime Saig_ManBmcTimeToStop( Saig_ParBmc_t * pPars, abctime nTimeToStopNG )
     abctime nTimeToStopGap = pPars->nTimeOutGap ? pPars->nTimeOutGap * CLOCKS_PER_SEC + Abc_Clock(): 0;
     abctime nTimeToStop = 0;
     if ( nTimeToStopNG && nTimeToStopGap )
-        nTimeToStop = Abc_MinInt( nTimeToStopNG, nTimeToStopGap );
+        nTimeToStop = nTimeToStopNG < nTimeToStopGap ? nTimeToStopNG : nTimeToStopGap;
     else if ( nTimeToStopNG )
         nTimeToStop = nTimeToStopNG;
     else if ( nTimeToStopGap )