diff options
Diffstat (limited to 'src/proof/cec')
-rw-r--r-- | src/proof/cec/cecSplit.c | 287 |
1 files changed, 155 insertions, 132 deletions
diff --git a/src/proof/cec/cecSplit.c b/src/proof/cec/cecSplit.c index f8bc6b07..b985a994 100644 --- a/src/proof/cec/cecSplit.c +++ b/src/proof/cec/cecSplit.c @@ -168,18 +168,6 @@ void Cec_GiaSplitExplore( Gia_Man_t * p ) SeeAlso [] ***********************************************************************/ -int Gia_SplitCofVar( Gia_Man_t * p ) -{ - Gia_Obj_t * pObj; - int i, iBest = -1, CostBest = -1; - if ( p->pRefs == NULL ) - Gia_ManCreateRefs( p ); - Gia_ManForEachPi( p, pObj, i ) - if ( CostBest < Gia_ObjRefNum(p, pObj) ) - iBest = i, CostBest = Gia_ObjRefNum(p, pObj); - assert( iBest >= 0 ); - return iBest; -} int * Gia_PermuteSpecialOrder( Gia_Man_t * p ) { Vec_Int_t * vPerm; @@ -215,12 +203,26 @@ Gia_Man_t * Gia_PermuteSpecial( Gia_Man_t * p ) SeeAlso [] ***********************************************************************/ -int Gia_SplitCofVar2( Gia_Man_t * p, int LookAhead ) +int Gia_SplitCofVar2( Gia_Man_t * p ) +{ + Gia_Obj_t * pObj; + int i, iBest = -1, CostBest = -1; + if ( p->pRefs == NULL ) + Gia_ManCreateRefs( p ); + Gia_ManForEachPi( p, pObj, i ) + if ( CostBest < Gia_ObjRefNum(p, pObj) ) + iBest = i, CostBest = Gia_ObjRefNum(p, pObj); + assert( iBest >= 0 ); + return iBest; +} +int Gia_SplitCofVar( Gia_Man_t * p, int LookAhead ) { Gia_Man_t * pPart; - int * pOrder = Gia_PermuteSpecialOrder( p ); int Cost0, Cost1, CostBest = ABC_INFINITY; - int i, iBest = -1; + int * pOrder, i, iBest = -1; + if ( LookAhead == 1 ) + return Gia_SplitCofVar2( p ); + pOrder = Gia_PermuteSpecialOrder( p ); LookAhead = Abc_MinInt( LookAhead, Gia_ManPiNum(p) ); for ( i = 0; i < LookAhead; i++ ) { @@ -232,20 +234,20 @@ int Gia_SplitCofVar2( Gia_Man_t * p, int LookAhead ) Cost1 = Gia_ManAndNum(pPart); Gia_ManStop( pPart ); + if ( CostBest > Cost0 + Cost1 ) + CostBest = Cost0 + Cost1, iBest = pOrder[i]; + /* pPart = Gia_ManDupExist( p, pOrder[i] ); printf( "%2d : Var = %4d Refs = %3d %6d %6d -> %6d %6d -> %6d\n", i, pOrder[i], Gia_ObjRefNum(p, Gia_ManPi(p, pOrder[i])), Cost0, Cost1, Cost0+Cost1, Gia_ManAndNum(p), Gia_ManAndNum(pPart) ); Gia_ManStop( pPart ); -*/ -// printf( "%2d : Var = %4d Refs = %3d %6d %6d -> %6d\n", -// i, pOrder[i], Gia_ObjRefNum(p, Gia_ManPi(p, pOrder[i])), -// Cost0, Cost1, Cost0+Cost1 ); - - if ( CostBest > Cost0 + Cost1 ) - CostBest = Cost0 + Cost1, iBest = pOrder[i]; + printf( "%2d : Var = %4d Refs = %3d %6d %6d -> %6d\n", + i, pOrder[i], Gia_ObjRefNum(p, Gia_ManPi(p, pOrder[i])), + Cost0, Cost1, Cost0+Cost1 ); +*/ } ABC_FREE( pOrder ); assert( iBest >= 0 ); @@ -263,6 +265,33 @@ int Gia_SplitCofVar2( Gia_Man_t * p, int LookAhead ) SeeAlso [] ***********************************************************************/ +Abc_Cex_t * Cec_SplitDeriveModel( Gia_Man_t * p, Cnf_Dat_t * pCnf, sat_solver * pSat ) +{ + Abc_Cex_t * pCex; + Gia_Obj_t * pObj; + int i, iLit, * pModel; + pModel = ABC_CALLOC( int, Gia_ManPiNum(p) ); + Gia_ManForEachPi( p, pObj, i ) + pModel[i] = sat_solver_var_value(pSat, pCnf->pVarNums[Gia_ObjId(p, pObj)]); + if ( p->vCofVars ) + Vec_IntForEachEntry( p->vCofVars, iLit, i ) + pModel[Abc_Lit2Var(iLit)] = !Abc_LitIsCompl(iLit); + pCex = Abc_CexCreate( 0, Gia_ManPiNum(p), pModel, 0, 0, 0 ); + ABC_FREE( pModel ); + return pCex; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ static inline Cnf_Dat_t * Cec_GiaDeriveGiaRemapped( Gia_Man_t * p ) { Cnf_Dat_t * pCnf; @@ -275,9 +304,7 @@ static inline Cnf_Dat_t * Cec_GiaDeriveGiaRemapped( Gia_Man_t * p ) static inline sat_solver * Cec_GiaDeriveSolver( Gia_Man_t * p, Cnf_Dat_t * pCnf, int nTimeOut ) { sat_solver * pSat; - int i, fDerive = (pCnf == NULL); - if ( pCnf == NULL ) - pCnf = Cec_GiaDeriveGiaRemapped( p ); + int i; pSat = sat_solver_new(); sat_solver_setnvars( pSat, pCnf->nVars ); for ( i = 0; i < pCnf->nClauses; i++ ) @@ -285,12 +312,9 @@ static inline sat_solver * Cec_GiaDeriveSolver( Gia_Man_t * p, Cnf_Dat_t * pCnf, { // the problem is UNSAT sat_solver_delete( pSat ); - Cnf_DataFree( pCnf ); return NULL; } sat_solver_set_runtime_limit( pSat, nTimeOut ? nTimeOut * CLOCKS_PER_SEC + Abc_Clock(): 0 ); - if ( fDerive ) - Cnf_DataFree( pCnf ); return pSat; } static inline int Cnf_GiaSolveOne( Gia_Man_t * p, Cnf_Dat_t * pCnf, int nTimeOut, int * pnVars, int * pnConfs ) @@ -306,42 +330,14 @@ static inline int Cnf_GiaSolveOne( Gia_Man_t * p, Cnf_Dat_t * pCnf, int nTimeOut status = sat_solver_solve( pSat, NULL, NULL, (ABC_INT64_T)0, (ABC_INT64_T)0, (ABC_INT64_T)0, (ABC_INT64_T)0 ); *pnVars = sat_solver_nvars( pSat ); *pnConfs = sat_solver_nconflicts( pSat ); + if ( status == l_True ) + p->pCexComb = Cec_SplitDeriveModel( p, pCnf, pSat ); sat_solver_delete( pSat ); if ( status == l_Undef ) return -1; if ( status == l_False ) return 1; return 0; -/* - // get pattern - Vec_IntClear( vLits ); - for ( i = 0; i < nFuncVars; i++ ) - Vec_IntPush( vLits, Vec_IntEntry(vTests, Iter*nFuncVars + i) ); - Gia_ManFaultAddOne( pM, pCnf, pSat, vLits, nFuncVars ); - if ( pPars->fVerbose ) - { - printf( "Iter%6d : ", Iter ); - printf( "Var =%10d ", sat_solver_nvars(pSat) ); - printf( "Clause =%10d ", sat_solver_nclauses(pSat) ); - printf( "Conflict =%10d ", sat_solver_nconflicts(pSat) ); - //Abc_PrintTime( 1, "Time", clkSat ); - ABC_PRTr( "Solver time", clkSat ); - } -*/ -} -static inline int Cnf_GiaCheckOne( Vec_Ptr_t * vStack, Gia_Man_t * p, Cnf_Dat_t * pCnf, int nTimeOut, int * pnVars, int * pnConfs ) -{ - int status = Cnf_GiaSolveOne( p, pCnf, nTimeOut, pnVars, pnConfs ); - if ( status == -1 ) - { - Vec_PtrPush( vStack, p ); - return 1; - } - Gia_ManStop( p ); - if ( status == 1 ) - return 1; - // satisfiable - return 0; } static inline void Cec_GiaSplitClean( Vec_Ptr_t * vStack ) { @@ -365,12 +361,12 @@ static inline void Cec_GiaSplitClean( Vec_Ptr_t * vStack ) ***********************************************************************/ void Cec_GiaSplitPrint( int nIter, int Depth, int nVars, int nConfs, int fStatus, double Prog, abctime clk ) { - printf( "%6d : ", nIter ); - printf( "Depth =%3d ", Depth ); - printf( "SatVar =%7d ", nVars ); - printf( "SatConf =%7d ", nConfs ); - printf( "%s ", fStatus ? (fStatus == 1 ? "UNSAT " : "UNDECIDED") : "SAT " ); - printf( "Progress = %.10f ", Prog ); + printf( "%6d : ", nIter ); + printf( "Depth =%3d ", Depth ); + printf( "SatVar =%7d ", nVars ); + printf( "SatConf =%7d ", nConfs ); + printf( "%s ", fStatus ? (fStatus == 1 ? "UNSAT " : "UNDECIDED") : "SAT " ); + printf( "Solved %8.4f %% ", 100*Prog ); Abc_PrintTime( 1, "Time", clk ); //ABC_PRTr( "Time", Abc_Clock()-clk ); } @@ -399,75 +395,99 @@ void Cec_GiaSplitPrintRefs( Gia_Man_t * p ) int Cec_GiaSplitTest2( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, int LookAhead, int fVerbose ) { abctime clkTotal = Abc_Clock(); - Gia_Man_t * pPart0, * pPart1, * pLast; Vec_Ptr_t * vStack; - int nSatVars, nSatConfs, fSatUnsat; - int nIter, iVar, Depth, RetValue = -1; + Cnf_Dat_t * pCnf; + int nSatVars, nSatConfs; + int nIter, status, RetValue = -1; double Progress = 0; + // check the problem + pCnf = Cec_GiaDeriveGiaRemapped( p ); + status = Cnf_GiaSolveOne( p, pCnf, nTimeOut, &nSatVars, &nSatConfs ); + Cnf_DataFree( pCnf ); + if ( fVerbose ) + Cec_GiaSplitPrint( 0, 0, nSatVars, nSatConfs, status, Progress, Abc_Clock() - clkTotal ); + if ( status == 0 ) + { + printf( "The problem is SAT without cofactoring.\n" ); + return 0; + } + if ( status == 1 ) + { + printf( "The problem is UNSAT without cofactoring.\n" ); + return 1; + } + assert( status == -1 ); // create local copy - p = Gia_ManDup( p ); - // start cofactored variables - assert( p->vCofVars == NULL ); - p->vCofVars = Vec_IntAlloc( 100 ); - // start with the current problem vStack = Vec_PtrAlloc( 1000 ); - if ( !Cnf_GiaCheckOne(vStack, p, NULL, nTimeOut, &nSatVars, &nSatConfs) ) - RetValue = 0; - else + Vec_PtrPush( vStack, Gia_ManDup(p) ); + // start with the current problem + for ( nIter = 1; Vec_PtrSize(vStack) > 0; nIter++ ) { - if ( fVerbose ) - Cec_GiaSplitPrint( 0, 0, nSatVars, nSatConfs, -1, Progress, Abc_Clock() - clkTotal ); - for ( nIter = 1; Vec_PtrSize(vStack) > 0; nIter++ ) + // get the last AIG + Gia_Man_t * pLast = (Gia_Man_t *)Vec_PtrPop( vStack ); + // determine cofactoring variable + int Depth = pLast->vCofVars ? Vec_IntSize(pLast->vCofVars) : 0; + int iVar = Gia_SplitCofVar( pLast, LookAhead ); + // cofactor + Gia_Man_t * pPart = Gia_ManDupCofactor( pLast, iVar, 0 ); + if ( pLast->vCofVars == NULL ) + pLast->vCofVars = Vec_IntAlloc( 100 ); + // create variable + pPart->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 ); + Vec_IntAppend( pPart->vCofVars, pLast->vCofVars ); + Vec_IntPush( pPart->vCofVars, Abc_Var2Lit(iVar, 1) ); + // solve the problem + pCnf = Cec_GiaDeriveGiaRemapped( pPart ); + status = Cnf_GiaSolveOne( pPart, pCnf, nTimeOut, &nSatVars, &nSatConfs ); + Cnf_DataFree( pCnf ); + if ( status == 1 ) + Progress += 1.0 / pow(2, Depth + 1); + if ( fVerbose ) + Cec_GiaSplitPrint( nIter, Depth, nSatVars, nSatConfs, status, Progress, Abc_Clock() - clkTotal ); + if ( status == 0 ) // SAT { - // get the last AIG - pLast = (Gia_Man_t *)Vec_PtrPop( vStack ); - // determine cofactoring variable - Depth = Vec_IntSize(pLast->vCofVars); - iVar = Gia_SplitCofVar2( pLast, LookAhead ); - // cofactor - pPart0 = Gia_ManDupCofactor( pLast, iVar, 0 ); - // create variable - pPart0->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 ); - Vec_IntAppend( pPart0->vCofVars, pLast->vCofVars ); - Vec_IntPush( pPart0->vCofVars, Abc_Var2Lit(iVar, 1) ); - // check this AIG - fSatUnsat = Vec_PtrSize(vStack); - if ( !Cnf_GiaCheckOne(vStack, pPart0, NULL, nTimeOut, &nSatVars, &nSatConfs) ) - { - Gia_ManStop( pLast ); - RetValue = 0; - break; - } - fSatUnsat = (fSatUnsat == Vec_PtrSize(vStack)); - if ( fSatUnsat ) - Progress += 1.0 / pow(2, Depth + 1); - if ( fVerbose ) - Cec_GiaSplitPrint( nIter, Depth, nSatVars, nSatConfs, fSatUnsat?1:-1, Progress, Abc_Clock() - clkTotal ); - // cofactor - pPart1 = Gia_ManDupCofactor( pLast, iVar, 1 ); - // create variable - pPart1->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 ); - Vec_IntAppend( pPart1->vCofVars, pLast->vCofVars ); - Vec_IntPush( pPart1->vCofVars, Abc_Var2Lit(iVar, 0) ); + p->pCexComb = pPart->pCexComb; pPart->pCexComb = NULL; Gia_ManStop( pLast ); - // check this AIG - fSatUnsat = Vec_PtrSize(vStack); - if ( !Cnf_GiaCheckOne(vStack, pPart1, NULL, nTimeOut, &nSatVars, &nSatConfs) ) - { - RetValue = 0; - break; - } - fSatUnsat = (fSatUnsat == Vec_PtrSize(vStack)); - if ( fSatUnsat ) - Progress += 1.0 / pow(2, Depth + 1); - if ( fVerbose ) - Cec_GiaSplitPrint( nIter, Depth, nSatVars, nSatConfs, fSatUnsat?1:-1, Progress, Abc_Clock() - clkTotal ); - if ( nIterMax && Vec_PtrSize(vStack) >= nIterMax ) - break; + Gia_ManStop( pPart ); + RetValue = 0; + break; + } + if ( status == 1 ) // UNSAT + Gia_ManStop( pPart ); + else // UNDEC + Vec_PtrPush( vStack, pPart ); + // cofactor + pPart = Gia_ManDupCofactor( pLast, iVar, 1 ); + // create variable + pPart->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 ); + Vec_IntAppend( pPart->vCofVars, pLast->vCofVars ); + Vec_IntPush( pPart->vCofVars, Abc_Var2Lit(iVar, 0) ); + Gia_ManStop( pLast ); + // solve the problem + pCnf = Cec_GiaDeriveGiaRemapped( pPart ); + status = Cnf_GiaSolveOne( pPart, pCnf, nTimeOut, &nSatVars, &nSatConfs ); + Cnf_DataFree( pCnf ); + if ( status == 1 ) + Progress += 1.0 / pow(2, Depth + 1); + if ( fVerbose ) + Cec_GiaSplitPrint( nIter, Depth, nSatVars, nSatConfs, status, Progress, Abc_Clock() - clkTotal ); + if ( status == 0 ) // SAT + { + p->pCexComb = pPart->pCexComb; pPart->pCexComb = NULL; + Gia_ManStop( pPart ); + RetValue = 0; + break; } - if ( Vec_PtrSize(vStack) == 0 ) - RetValue = 1; + if ( status == 1 ) // UNSAT + Gia_ManStop( pPart ); + else // UNDEC + Vec_PtrPush( vStack, pPart ); + if ( nIterMax && Vec_PtrSize(vStack) >= nIterMax ) + break; } + if ( Vec_PtrSize(vStack) == 0 ) + RetValue = 1; + // finish Cec_GiaSplitClean( vStack ); if ( RetValue == 0 ) printf( "Problem is SAT " ); @@ -530,9 +550,11 @@ int Cec_GiaSplitTest( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, int Par_ThData_t ThData[PAR_THR_MAX]; pthread_t WorkerThread[PAR_THR_MAX]; Vec_Ptr_t * vStack; + Cnf_Dat_t * pCnf; double Progress = 0; int i, status, nSatVars, nSatConfs; int nIter = 0, RetValue = -1, fWorkToDo = 1; + Abc_CexFreeP( &p->pCexComb ); if ( fVerbose ) printf( "Solving CEC problem by cofactoring with the following parameters:\n" ); if ( fVerbose ) @@ -543,7 +565,9 @@ int Cec_GiaSplitTest( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, int nProcs--; assert( nProcs >= 1 && nProcs <= PAR_THR_MAX ); // check the problem - status = Cnf_GiaSolveOne( p, NULL, nTimeOut, &nSatVars, &nSatConfs ); + pCnf = Cec_GiaDeriveGiaRemapped( p ); + status = Cnf_GiaSolveOne( p, pCnf, nTimeOut, &nSatVars, &nSatConfs ); + Cnf_DataFree( pCnf ); if ( fVerbose ) Cec_GiaSplitPrint( 0, 0, nSatVars, nSatConfs, status, Progress, Abc_Clock() - clkTotal ); if ( status == 0 ) @@ -558,12 +582,8 @@ int Cec_GiaSplitTest( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, int } assert( status == -1 ); // create local copy - p = Gia_ManDup( p ); vStack = Vec_PtrAlloc( 1000 ); - Vec_PtrPush( vStack, p ); - // start cofactored variables - assert( p->vCofVars == NULL ); - p->vCofVars = Vec_IntAlloc( 100 ); + Vec_PtrPush( vStack, Gia_ManDup(p) ); // start threads for ( i = 0; i < nProcs; i++ ) { @@ -593,18 +613,21 @@ int Cec_GiaSplitTest( Gia_Man_t * p, int nProcs, int nTimeOut, int nIterMax, int if ( ThData[i].p != NULL ) { Gia_Man_t * pLast = ThData[i].p; - int Depth = Vec_IntSize(pLast->vCofVars); + int Depth = pLast->vCofVars ? Vec_IntSize(pLast->vCofVars) : 0; + if ( pLast->vCofVars == NULL ) + pLast->vCofVars = Vec_IntAlloc( 100 ); if ( fVerbose ) Cec_GiaSplitPrint( i, Depth, ThData[i].nVars, ThData[i].nConfs, ThData[i].Result, Progress, Abc_Clock() - clkTotal ); if ( ThData[i].Result == 0 ) // SAT { + p->pCexComb = pLast->pCexComb; pLast->pCexComb = NULL; RetValue = 0; goto finish; } if ( ThData[i].Result == -1 ) // UNDEC { // determine cofactoring variable - int iVar = Gia_SplitCofVar2( pLast, LookAhead ); + int iVar = Gia_SplitCofVar( pLast, LookAhead ); // cofactor Gia_Man_t * pPart = Gia_ManDupCofactor( pLast, iVar, 0 ); pPart->vCofVars = Vec_IntAlloc( Vec_IntSize(pLast->vCofVars) + 1 ); |