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/**CFile****************************************************************
FileName [sswSemi.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Inductive prover with constraints.]
Synopsis [Semiformal for equivalence classes.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - September 1, 2008.]
Revision [$Id: sswSemi.c,v 1.00 2008/09/01 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sswInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
typedef struct Ssw_Sem_t_ Ssw_Sem_t; // BMC manager
struct Ssw_Sem_t_
{
// parameters
int nConfMaxStart; // the starting conflict limit
int nConfMax; // the intermediate conflict limit
int nFramesSweep; // the number of frames to sweep
int fVerbose; // prints output statistics
// equivalences considered
Ssw_Man_t * pMan; // SAT sweeping manager
Vec_Ptr_t * vTargets; // the nodes that are watched
// storage for patterns
int nPatternsAlloc; // the max number of interesting states
int nPatterns; // the number of patterns
Vec_Ptr_t * vPatterns; // storage for the interesting states
Vec_Int_t * vHistory; // what state and how many steps
};
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Sem_t * Ssw_SemManStart( Ssw_Man_t * pMan, int nConfMax, int fVerbose )
{
Ssw_Sem_t * p;
Aig_Obj_t * pObj;
int i;
// create interpolation manager
p = ABC_ALLOC( Ssw_Sem_t, 1 );
memset( p, 0, sizeof(Ssw_Sem_t) );
p->nConfMaxStart = nConfMax;
p->nConfMax = nConfMax;
p->nFramesSweep = Abc_MaxInt( (1<<21)/Aig_ManNodeNum(pMan->pAig), pMan->nFrames );
p->fVerbose = fVerbose;
// equivalences considered
p->pMan = pMan;
p->vTargets = Vec_PtrAlloc( Saig_ManPoNum(p->pMan->pAig) );
Saig_ManForEachPo( p->pMan->pAig, pObj, i )
Vec_PtrPush( p->vTargets, Aig_ObjFanin0(pObj) );
// storage for patterns
p->nPatternsAlloc = 512;
p->nPatterns = 1;
p->vPatterns = Vec_PtrAllocSimInfo( Aig_ManRegNum(p->pMan->pAig), Abc_BitWordNum(p->nPatternsAlloc) );
Vec_PtrCleanSimInfo( p->vPatterns, 0, Abc_BitWordNum(p->nPatternsAlloc) );
p->vHistory = Vec_IntAlloc( 100 );
Vec_IntPush( p->vHistory, 0 );
// update arrays of the manager
assert( 0 );
/*
ABC_FREE( p->pMan->pNodeToFrames );
Vec_IntFree( p->pMan->vSatVars );
p->pMan->pNodeToFrames = ABC_CALLOC( Aig_Obj_t *, Aig_ManObjNumMax(p->pMan->pAig) * p->nFramesSweep );
p->pMan->vSatVars = Vec_IntStart( Aig_ManObjNumMax(p->pMan->pAig) * (p->nFramesSweep+1) );
*/
return p;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SemManStop( Ssw_Sem_t * p )
{
Vec_PtrFree( p->vTargets );
Vec_PtrFree( p->vPatterns );
Vec_IntFree( p->vHistory );
ABC_FREE( p );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SemCheckTargets( Ssw_Sem_t * p )
{
Aig_Obj_t * pObj;
int i;
Vec_PtrForEachEntry( Aig_Obj_t *, p->vTargets, pObj, i )
if ( !Ssw_ObjIsConst1Cand(p->pMan->pAig, pObj) )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ManFilterBmcSavePattern( Ssw_Sem_t * p )
{
unsigned * pInfo;
Aig_Obj_t * pObj;
int i;
if ( p->nPatterns >= p->nPatternsAlloc )
return;
Saig_ManForEachLo( p->pMan->pAig, pObj, i )
{
pInfo = (unsigned *)Vec_PtrEntry( p->vPatterns, i );
if ( Abc_InfoHasBit( p->pMan->pPatWords, Saig_ManPiNum(p->pMan->pAig) + i ) )
Abc_InfoSetBit( pInfo, p->nPatterns );
}
p->nPatterns++;
}
/**Function*************************************************************
Synopsis [Performs fraiging for the internal nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ManFilterBmc( Ssw_Sem_t * pBmc, int iPat, int fCheckTargets )
{
Ssw_Man_t * p = pBmc->pMan;
Aig_Obj_t * pObj, * pObjNew, * pObjLi, * pObjLo;
unsigned * pInfo;
int i, f, RetValue, fFirst = 0;
abctime clk;
clk = Abc_Clock();
// start initialized timeframes
p->pFrames = Aig_ManStart( Aig_ManObjNumMax(p->pAig) * 3 );
Saig_ManForEachLo( p->pAig, pObj, i )
{
pInfo = (unsigned *)Vec_PtrEntry( pBmc->vPatterns, i );
pObjNew = Aig_NotCond( Aig_ManConst1(p->pFrames), !Abc_InfoHasBit(pInfo, iPat) );
Ssw_ObjSetFrame( p, pObj, 0, pObjNew );
}
// sweep internal nodes
RetValue = pBmc->nFramesSweep;
for ( f = 0; f < pBmc->nFramesSweep; f++ )
{
// map constants and PIs
Ssw_ObjSetFrame( p, Aig_ManConst1(p->pAig), f, Aig_ManConst1(p->pFrames) );
Saig_ManForEachPi( p->pAig, pObj, i )
Ssw_ObjSetFrame( p, pObj, f, Aig_ObjCreateCi(p->pFrames) );
// sweep internal nodes
Aig_ManForEachNode( p->pAig, pObj, i )
{
pObjNew = Aig_And( p->pFrames, Ssw_ObjChild0Fra(p, pObj, f), Ssw_ObjChild1Fra(p, pObj, f) );
Ssw_ObjSetFrame( p, pObj, f, pObjNew );
if ( Ssw_ManSweepNode( p, pObj, f, 1, NULL ) )
{
Ssw_ManFilterBmcSavePattern( pBmc );
if ( fFirst == 0 )
{
fFirst = 1;
pBmc->nConfMax *= 10;
}
}
if ( f > 0 && p->pMSat->pSat->stats.conflicts >= pBmc->nConfMax )
{
RetValue = -1;
break;
}
}
// quit if this is the last timeframe
if ( p->pMSat->pSat->stats.conflicts >= pBmc->nConfMax )
{
RetValue += f + 1;
break;
}
if ( fCheckTargets && Ssw_SemCheckTargets( pBmc ) )
break;
// transfer latch input to the latch outputs
// build logic cones for register outputs
Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i )
{
pObjNew = Ssw_ObjChild0Fra(p, pObjLi,f);
Ssw_ObjSetFrame( p, pObjLo, f+1, pObjNew );
Ssw_CnfNodeAddToSolver( p->pMSat, Aig_Regular(pObjNew) );
}
//Abc_Print( 1, "Frame %2d : Conflicts = %6d. \n", f, p->pSat->stats.conflicts );
}
if ( fFirst )
pBmc->nConfMax /= 10;
// cleanup
Ssw_ClassesCheck( p->ppClasses );
p->timeBmc += Abc_Clock() - clk;
return RetValue;
}
/**Function*************************************************************
Synopsis [Returns 1 if one of the targets has failed.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_FilterUsingSemi( Ssw_Man_t * pMan, int fCheckTargets, int nConfMax, int fVerbose )
{
Ssw_Sem_t * p;
int RetValue, Frames, Iter;
abctime clk = Abc_Clock();
p = Ssw_SemManStart( pMan, nConfMax, fVerbose );
if ( fCheckTargets && Ssw_SemCheckTargets( p ) )
{
assert( 0 );
Ssw_SemManStop( p );
return 1;
}
if ( fVerbose )
{
Abc_Print( 1, "AIG : C = %6d. Cl = %6d. Nodes = %6d. ConfMax = %6d. FramesMax = %6d.\n",
Ssw_ClassesCand1Num(p->pMan->ppClasses), Ssw_ClassesClassNum(p->pMan->ppClasses),
Aig_ManNodeNum(p->pMan->pAig), p->nConfMax, p->nFramesSweep );
}
RetValue = 0;
for ( Iter = 0; Iter < p->nPatterns; Iter++ )
{
clk = Abc_Clock();
pMan->pMSat = Ssw_SatStart( 0 );
Frames = Ssw_ManFilterBmc( p, Iter, fCheckTargets );
if ( fVerbose )
{
Abc_Print( 1, "%3d : C = %6d. Cl = %6d. NR = %6d. F = %3d. C = %5d. P = %3d. %s ",
Iter, Ssw_ClassesCand1Num(p->pMan->ppClasses), Ssw_ClassesClassNum(p->pMan->ppClasses),
Aig_ManNodeNum(p->pMan->pFrames), Frames, (int)p->pMan->pMSat->pSat->stats.conflicts, p->nPatterns,
p->pMan->nSatFailsReal? "f" : " " );
ABC_PRT( "T", Abc_Clock() - clk );
}
Ssw_ManCleanup( p->pMan );
if ( fCheckTargets && Ssw_SemCheckTargets( p ) )
{
Abc_Print( 1, "Target is hit!!!\n" );
RetValue = 1;
}
if ( p->nPatterns >= p->nPatternsAlloc )
break;
}
Ssw_SemManStop( p );
pMan->nStrangers = 0;
pMan->nSatCalls = 0;
pMan->nSatProof = 0;
pMan->nSatFailsReal = 0;
pMan->nSatCallsUnsat = 0;
pMan->nSatCallsSat = 0;
pMan->timeSimSat = 0;
pMan->timeSat = 0;
pMan->timeSatSat = 0;
pMan->timeSatUnsat = 0;
pMan->timeSatUndec = 0;
return RetValue;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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