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/**CFile****************************************************************
FileName [intM114.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Interpolation engine.]
Synopsis [Intepolation using ABC's proof generator added to MiniSat-1.14c.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 24, 2008.]
Revision [$Id: intM114.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "intInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Returns the SAT solver for one interpolation run.]
Description [pInter is the previous interpolant. pAig is one time frame.
pFrames is the unrolled time frames.]
SideEffects []
SeeAlso []
***********************************************************************/
sat_solver * Inter_ManDeriveSatSolver(
Aig_Man_t * pInter, Cnf_Dat_t * pCnfInter,
Aig_Man_t * pAig, Cnf_Dat_t * pCnfAig,
Aig_Man_t * pFrames, Cnf_Dat_t * pCnfFrames,
Vec_Int_t * vVarsAB, int fUseBackward )
{
sat_solver * pSat;
Aig_Obj_t * pObj, * pObj2;
int i, Lits[2];
//Aig_ManDumpBlif( pInter, "out_inter.blif", NULL, NULL );
//Aig_ManDumpBlif( pAig, "out_aig.blif", NULL, NULL );
//Aig_ManDumpBlif( pFrames, "out_frames.blif", NULL, NULL );
// sanity checks
assert( Aig_ManRegNum(pInter) == 0 );
assert( Aig_ManRegNum(pAig) > 0 );
assert( Aig_ManRegNum(pFrames) == 0 );
assert( Aig_ManPoNum(pInter) == 1 );
assert( Aig_ManPoNum(pFrames) == fUseBackward? Saig_ManRegNum(pAig) : 1 );
assert( fUseBackward || Aig_ManPiNum(pInter) == Aig_ManRegNum(pAig) );
// assert( (Aig_ManPiNum(pFrames) - Aig_ManRegNum(pAig)) % Saig_ManPiNum(pAig) == 0 );
// prepare CNFs
Cnf_DataLift( pCnfAig, pCnfFrames->nVars );
Cnf_DataLift( pCnfInter, pCnfFrames->nVars + pCnfAig->nVars );
// start the solver
pSat = sat_solver_new();
sat_solver_store_alloc( pSat );
sat_solver_setnvars( pSat, pCnfInter->nVars + pCnfAig->nVars + pCnfFrames->nVars );
// add clauses of A
// interpolant
for ( i = 0; i < pCnfInter->nClauses; i++ )
{
if ( !sat_solver_addclause( pSat, pCnfInter->pClauses[i], pCnfInter->pClauses[i+1] ) )
{
sat_solver_delete( pSat );
// return clauses to the original state
Cnf_DataLift( pCnfAig, -pCnfFrames->nVars );
Cnf_DataLift( pCnfInter, -pCnfFrames->nVars -pCnfAig->nVars );
return NULL;
}
}
// connector clauses
if ( fUseBackward )
{
Saig_ManForEachLi( pAig, pObj2, i )
{
if ( Saig_ManRegNum(pAig) == Aig_ManPiNum(pInter) )
pObj = Aig_ManPi( pInter, i );
else
{
assert( Aig_ManPiNum(pAig) == Aig_ManPiNum(pInter) );
pObj = Aig_ManPi( pInter, Aig_ManPiNum(pAig)-Saig_ManRegNum(pAig) + i );
}
Lits[0] = toLitCond( pCnfInter->pVarNums[pObj->Id], 0 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 1 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
Lits[0] = toLitCond( pCnfInter->pVarNums[pObj->Id], 1 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 0 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
}
}
else
{
Aig_ManForEachPi( pInter, pObj, i )
{
pObj2 = Saig_ManLo( pAig, i );
Lits[0] = toLitCond( pCnfInter->pVarNums[pObj->Id], 0 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 1 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
Lits[0] = toLitCond( pCnfInter->pVarNums[pObj->Id], 1 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 0 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
}
}
// one timeframe
for ( i = 0; i < pCnfAig->nClauses; i++ )
{
if ( !sat_solver_addclause( pSat, pCnfAig->pClauses[i], pCnfAig->pClauses[i+1] ) )
assert( 0 );
}
// connector clauses
Vec_IntClear( vVarsAB );
if ( fUseBackward )
{
Aig_ManForEachPo( pFrames, pObj, i )
{
assert( pCnfFrames->pVarNums[pObj->Id] >= 0 );
Vec_IntPush( vVarsAB, pCnfFrames->pVarNums[pObj->Id] );
pObj2 = Saig_ManLo( pAig, i );
Lits[0] = toLitCond( pCnfFrames->pVarNums[pObj->Id], 0 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 1 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
Lits[0] = toLitCond( pCnfFrames->pVarNums[pObj->Id], 1 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 0 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
}
}
else
{
Aig_ManForEachPi( pFrames, pObj, i )
{
if ( i == Aig_ManRegNum(pAig) )
break;
Vec_IntPush( vVarsAB, pCnfFrames->pVarNums[pObj->Id] );
pObj2 = Saig_ManLi( pAig, i );
Lits[0] = toLitCond( pCnfFrames->pVarNums[pObj->Id], 0 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 1 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
Lits[0] = toLitCond( pCnfFrames->pVarNums[pObj->Id], 1 );
Lits[1] = toLitCond( pCnfAig->pVarNums[pObj2->Id], 0 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
}
}
// add clauses of B
sat_solver_store_mark_clauses_a( pSat );
for ( i = 0; i < pCnfFrames->nClauses; i++ )
{
if ( !sat_solver_addclause( pSat, pCnfFrames->pClauses[i], pCnfFrames->pClauses[i+1] ) )
{
pSat->fSolved = 1;
break;
}
}
sat_solver_store_mark_roots( pSat );
// return clauses to the original state
Cnf_DataLift( pCnfAig, -pCnfFrames->nVars );
Cnf_DataLift( pCnfInter, -pCnfFrames->nVars -pCnfAig->nVars );
return pSat;
}
/**Function*************************************************************
Synopsis [Performs one SAT run with interpolation.]
Description [Returns 1 if proven. 0 if failed. -1 if undecided.]
SideEffects []
SeeAlso []
***********************************************************************/
int Inter_ManPerformOneStep( Inter_Man_t * p, int fUseBias, int fUseBackward, int nTimeNewOut )
{
sat_solver * pSat;
void * pSatCnf = NULL;
Inta_Man_t * pManInterA;
// Intb_Man_t * pManInterB;
int * pGlobalVars;
int clk, status, RetValue;
int i, Var;
// assert( p->pInterNew == NULL );
// derive the SAT solver
pSat = Inter_ManDeriveSatSolver( p->pInter, p->pCnfInter, p->pAigTrans, p->pCnfAig, p->pFrames, p->pCnfFrames, p->vVarsAB, fUseBackward );
if ( pSat == NULL )
{
p->pInterNew = NULL;
return 1;
}
// set runtime limit
if ( nTimeNewOut )
sat_solver_set_runtime_limit( pSat, nTimeNewOut );
// collect global variables
pGlobalVars = ABC_CALLOC( int, sat_solver_nvars(pSat) );
Vec_IntForEachEntry( p->vVarsAB, Var, i )
pGlobalVars[Var] = 1;
pSat->pGlobalVars = fUseBias? pGlobalVars : NULL;
// solve the problem
clk = clock();
status = sat_solver_solve( pSat, NULL, NULL, (ABC_INT64_T)p->nConfLimit, (ABC_INT64_T)0, (ABC_INT64_T)0, (ABC_INT64_T)0 );
p->nConfCur = pSat->stats.conflicts;
p->timeSat += clock() - clk;
pSat->pGlobalVars = NULL;
ABC_FREE( pGlobalVars );
if ( status == l_False )
{
pSatCnf = sat_solver_store_release( pSat );
RetValue = 1;
}
else if ( status == l_True )
{
RetValue = 0;
}
else
{
RetValue = -1;
}
sat_solver_delete( pSat );
if ( pSatCnf == NULL )
return RetValue;
// create the resulting manager
clk = clock();
/*
if ( !fUseIp )
{
pManInterA = Inta_ManAlloc();
p->pInterNew = Inta_ManInterpolate( pManInterA, pSatCnf, p->vVarsAB, 0 );
Inta_ManFree( pManInterA );
}
else
{
Aig_Man_t * pInterNew2;
int RetValue;
pManInterA = Inta_ManAlloc();
p->pInterNew = Inta_ManInterpolate( pManInterA, pSatCnf, p->vVarsAB, 0 );
// Inter_ManVerifyInterpolant1( pManInterA, pSatCnf, p->pInterNew );
Inta_ManFree( pManInterA );
pManInterB = Intb_ManAlloc();
pInterNew2 = Intb_ManInterpolate( pManInterB, pSatCnf, p->vVarsAB, 0 );
Inter_ManVerifyInterpolant2( pManInterB, pSatCnf, pInterNew2 );
Intb_ManFree( pManInterB );
// check relationship
RetValue = Inter_ManCheckEquivalence( pInterNew2, p->pInterNew );
if ( RetValue )
printf( "Equivalence \"Ip == Im\" holds\n" );
else
{
// printf( "Equivalence \"Ip == Im\" does not hold\n" );
RetValue = Inter_ManCheckContainment( pInterNew2, p->pInterNew );
if ( RetValue )
printf( "Containment \"Ip -> Im\" holds\n" );
else
printf( "Containment \"Ip -> Im\" does not hold\n" );
RetValue = Inter_ManCheckContainment( p->pInterNew, pInterNew2 );
if ( RetValue )
printf( "Containment \"Im -> Ip\" holds\n" );
else
printf( "Containment \"Im -> Ip\" does not hold\n" );
}
Aig_ManStop( pInterNew2 );
}
*/
pManInterA = Inta_ManAlloc();
p->pInterNew = (Aig_Man_t *)Inta_ManInterpolate( pManInterA, (Sto_Man_t *)pSatCnf, p->vVarsAB, 0 );
Inta_ManFree( pManInterA );
p->timeInt += clock() - clk;
Sto_ManFree( (Sto_Man_t *)pSatCnf );
return RetValue;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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