added callbacks to bmc3 and sat solver

src/sat/bmc/bmcBmc3.c

@@ -1416,6 +1416,8 @@ int Saig_ManBmcScalable( Aig_Man_t * pAig, Saig_ParBmc_t * pPars )
     p->pSat->nLearntRatio = p->pPars->nLearnedPerce;
     p->pSat->nLearntMax   = p->pSat->nLearntStart;
     p->pSat->fNoRestarts  = p->pPars->fNoRestarts;
+    p->pSat->RunId        = p->pPars->RunId;
+    p->pSat->pFuncStop    = p->pPars->pFuncStop;
     if ( pPars->fSolveAll && p->vCexes == NULL )
         p->vCexes = Vec_PtrStart( Saig_ManPoNum(pAig) );
     if ( pPars->fVerbose )

src/sat/bsat/satSolver.c

@@ -1956,6 +1956,8 @@ int sat_solver_solve_internal(sat_solver* s)
             break;
         if ( s->nRuntimeLimit && Abc_Clock() > s->nRuntimeLimit )
             break;
+        if ( s->pFuncStop && s->pFuncStop(s->RunId) )
+            break;
     }
     if (s->verbosity >= 1)
         printf("==============================================================================\n");

src/sat/bsat/satSolver.h

@@ -196,6 +196,10 @@ struct sat_solver_t
     // CNF loading
     void *      pCnfMan;           // external CNF manager
     int(*pCnfFunc)(void * p, int); // external callback
+
+    // termination callback
+    int         RunId;          // SAT id in this run
+    int(*pFuncStop)(int);       // callback to terminate
 };
 
 static inline clause * clause_read( sat_solver * s, cla h )