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/**CFile****************************************************************
FileName [sswSat.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Inductive prover with constraints.]
Synopsis [On-demand uniqueness constraints.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - September 1, 2008.]
Revision [$Id: sswSat.c,v 1.00 2008/09/01 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sswInt.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Returns the result of merging the two vectors.]
Description [Assumes that the vectors are sorted in the increasing order.]
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Vec_PtrTwoMerge( Vec_Ptr_t * vArr1, Vec_Ptr_t * vArr2, Vec_Ptr_t * vArr )
{
Aig_Obj_t ** pBeg = (Aig_Obj_t **)vArr->pArray;
Aig_Obj_t ** pBeg1 = (Aig_Obj_t **)vArr1->pArray;
Aig_Obj_t ** pBeg2 = (Aig_Obj_t **)vArr2->pArray;
Aig_Obj_t ** pEnd1 = (Aig_Obj_t **)vArr1->pArray + vArr1->nSize;
Aig_Obj_t ** pEnd2 = (Aig_Obj_t **)vArr2->pArray + vArr2->nSize;
Vec_PtrGrow( vArr, Vec_PtrSize(vArr1) + Vec_PtrSize(vArr2) );
pBeg = (Aig_Obj_t **)vArr->pArray;
while ( pBeg1 < pEnd1 && pBeg2 < pEnd2 )
{
if ( (*pBeg1)->Id == (*pBeg2)->Id )
*pBeg++ = *pBeg1++, pBeg2++;
else if ( (*pBeg1)->Id < (*pBeg2)->Id )
*pBeg++ = *pBeg1++;
else
*pBeg++ = *pBeg2++;
}
while ( pBeg1 < pEnd1 )
*pBeg++ = *pBeg1++;
while ( pBeg2 < pEnd2 )
*pBeg++ = *pBeg2++;
vArr->nSize = pBeg - (Aig_Obj_t **)vArr->pArray;
assert( vArr->nSize <= vArr->nCap );
assert( vArr->nSize >= vArr1->nSize );
assert( vArr->nSize >= vArr2->nSize );
}
/**Function*************************************************************
Synopsis [Returns the result of merging the two vectors.]
Description [Assumes that the vectors are sorted in the increasing order.]
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Vec_PtrTwoCommon( Vec_Ptr_t * vArr1, Vec_Ptr_t * vArr2, Vec_Ptr_t * vArr )
{
Aig_Obj_t ** pBeg = (Aig_Obj_t **)vArr->pArray;
Aig_Obj_t ** pBeg1 = (Aig_Obj_t **)vArr1->pArray;
Aig_Obj_t ** pBeg2 = (Aig_Obj_t **)vArr2->pArray;
Aig_Obj_t ** pEnd1 = (Aig_Obj_t **)vArr1->pArray + vArr1->nSize;
Aig_Obj_t ** pEnd2 = (Aig_Obj_t **)vArr2->pArray + vArr2->nSize;
Vec_PtrGrow( vArr, AIG_MIN( Vec_PtrSize(vArr1), Vec_PtrSize(vArr2) ) );
pBeg = (Aig_Obj_t **)vArr->pArray;
while ( pBeg1 < pEnd1 && pBeg2 < pEnd2 )
{
if ( (*pBeg1)->Id == (*pBeg2)->Id )
*pBeg++ = *pBeg1++, pBeg2++;
else if ( (*pBeg1)->Id < (*pBeg2)->Id )
// *pBeg++ = *pBeg1++;
pBeg1++;
else
// *pBeg++ = *pBeg2++;
pBeg2++;
}
// while ( pBeg1 < pEnd1 )
// *pBeg++ = *pBeg1++;
// while ( pBeg2 < pEnd2 )
// *pBeg++ = *pBeg2++;
vArr->nSize = pBeg - (Aig_Obj_t **)vArr->pArray;
assert( vArr->nSize <= vArr->nCap );
assert( vArr->nSize <= vArr1->nSize );
assert( vArr->nSize <= vArr2->nSize );
}
/**Function*************************************************************
Synopsis [Returns 1 if uniqueness constraints can be added.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ManUniqueOne( Ssw_Man_t * p, Aig_Obj_t * pRepr, Aig_Obj_t * pObj )
{
int fVerbose = 1;
Aig_Obj_t * ppObjs[2], * pTemp;
Vec_Ptr_t * vSupp, * vSupp2;
int i, k, Value0, Value1, RetValue;
assert( p->pPars->nFramesK > 1 );
vSupp = Vec_PtrAlloc( 100 );
vSupp2 = Vec_PtrAlloc( 100 );
Vec_PtrClear( p->vCommon );
// compute the first support in terms of LOs
ppObjs[0] = pRepr;
ppObjs[1] = pObj;
Aig_SupportNodes( p->pAig, ppObjs, 2, vSupp );
// modify support to be in terms of LIs
k = 0;
Vec_PtrForEachEntry( vSupp, pTemp, i )
if ( Saig_ObjIsLo(p->pAig, pTemp) )
Vec_PtrWriteEntry( vSupp, k++, Saig_ObjLoToLi(p->pAig, pTemp) );
Vec_PtrShrink( vSupp, k );
// compute the support of support
Aig_SupportNodes( p->pAig, (Aig_Obj_t **)Vec_PtrArray(vSupp), Vec_PtrSize(vSupp), vSupp2 );
// return support to LO
Vec_PtrForEachEntry( vSupp, pTemp, i )
Vec_PtrWriteEntry( vSupp, i, Saig_ObjLiToLo(p->pAig, pTemp) );
// find the number of common vars
Vec_PtrSort( vSupp, Aig_ObjCompareIdIncrease );
Vec_PtrSort( vSupp2, Aig_ObjCompareIdIncrease );
Vec_PtrTwoCommon( vSupp, vSupp2, p->vCommon );
// Vec_PtrTwoMerge( vSupp, vSupp2, p->vCommon );
/*
{
Vec_Ptr_t * vNew = Vec_PtrDup(vSupp);
Vec_PtrUniqify( vNew, Aig_ObjCompareIdIncrease );
if ( Vec_PtrSize(vNew) != Vec_PtrSize(vSupp) )
printf( "Not unique!\n" );
Vec_PtrFree( vNew );
Vec_PtrForEachEntry( vSupp, pTemp, i )
printf( "%d ", pTemp->Id );
printf( "\n" );
}
{
Vec_Ptr_t * vNew = Vec_PtrDup(vSupp2);
Vec_PtrUniqify( vNew, Aig_ObjCompareIdIncrease );
if ( Vec_PtrSize(vNew) != Vec_PtrSize(vSupp2) )
printf( "Not unique!\n" );
Vec_PtrFree( vNew );
Vec_PtrForEachEntry( vSupp2, pTemp, i )
printf( "%d ", pTemp->Id );
printf( "\n" );
}
{
Vec_Ptr_t * vNew = Vec_PtrDup(p->vCommon);
Vec_PtrUniqify( vNew, Aig_ObjCompareIdIncrease );
if ( Vec_PtrSize(vNew) != Vec_PtrSize(p->vCommon) )
printf( "Not unique!\n" );
Vec_PtrFree( vNew );
Vec_PtrForEachEntry( p->vCommon, pTemp, i )
printf( "%d ", pTemp->Id );
printf( "\n" );
}
*/
if ( fVerbose )
printf( "Node = %5d : One = %3d. Two = %3d. Common = %3d. ",
Aig_ObjId(pObj), Vec_PtrSize(vSupp), Vec_PtrSize(vSupp2), Vec_PtrSize(p->vCommon) );
// Vec_PtrClear( vSupp );
// Vec_PtrForEachEntry( vSupp2, pTemp, i )
// Vec_PtrPush( vSupp, pTemp );
// check the current values
RetValue = 1;
// Vec_PtrForEachEntry( p->vCommon, pTemp, i )
Vec_PtrForEachEntry( vSupp, pTemp, i )
{
Value0 = Ssw_ManGetSatVarValue( p, pTemp, 0 );
Value1 = Ssw_ManGetSatVarValue( p, pTemp, 1 );
if ( Value0 != Value1 )
RetValue = 0;
if ( fVerbose )
printf( "%d", Value0 ^ Value1 );
}
if ( Vec_PtrSize(p->vCommon) == 0 )
RetValue = 0;
Vec_PtrForEachEntry( vSupp, pTemp, i )
printf( " %d", pTemp->Id );
if ( fVerbose )
printf( "\n" );
Vec_PtrClear( p->vCommon );
Vec_PtrForEachEntry( vSupp, pTemp, i )
Vec_PtrPush( p->vCommon, pTemp );
Vec_PtrFree( vSupp );
Vec_PtrFree( vSupp2 );
return RetValue;
}
/**Function*************************************************************
Synopsis [Returns the output of the uniqueness constraint.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ManUniqueAddConstraint( Ssw_Man_t * p, Vec_Ptr_t * vCommon, int f1, int f2 )
{
Aig_Obj_t * pObj, * pObj1New, * pObj2New, * pMiter, * pTotal;
int i, pLits[2];
// int RetValue;
assert( Vec_PtrSize(vCommon) > 0 );
// generate the constraint
pTotal = Aig_ManConst0(p->pFrames);
Vec_PtrForEachEntry( vCommon, pObj, i )
{
assert( Saig_ObjIsLo(p->pAig, pObj) );
pObj1New = Ssw_ObjFrame( p, pObj, f1 );
pObj2New = Ssw_ObjFrame( p, pObj, f2 );
pMiter = Aig_Exor( p->pFrames, pObj1New, pObj2New );
pTotal = Aig_Or( p->pFrames, pTotal, pMiter );
}
/*
if ( Aig_ObjIsConst1(Aig_Regular(pTotal)) )
{
// printf( "Skipped\n" );
return 0;
}
*/
p->nUniques++;
// create CNF
// {
// int Num1 = p->nSatVars;
Ssw_CnfNodeAddToSolver( p, Aig_Regular(pTotal) );
// printf( "Created variable %d while vars are %d. (diff = %d)\n",
// Ssw_ObjSatNum( p, Aig_Regular(pTotal) ), p->nSatVars, p->nSatVars - Num1 );
// }
// add output constraint
pLits[0] = toLitCond( Ssw_ObjSatNum(p,Aig_Regular(pTotal)), Aig_IsComplement(pTotal) );
/*
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 1 );
assert( RetValue );
// simplify the solver
if ( p->pSat->qtail != p->pSat->qhead )
{
RetValue = sat_solver_simplify(p->pSat);
assert( RetValue != 0 );
}
*/
assert( p->iOutputLit == -1 );
p->iOutputLit = pLits[0];
return 1;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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