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/**CFile****************************************************************
FileName [utilCex.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Handling counter-examples.]
Synopsis [Handling counter-examples.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - Feburary 13, 2011.]
Revision [$Id: utilCex.c,v 1.00 2011/02/11 00:00:00 alanmi Exp $]
***********************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "abc_global.h"
#include "utilCex.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Allocates a counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Cex_t * Abc_CexAlloc( int nRegs, int nRealPis, int nFrames )
{
Abc_Cex_t * pCex;
int nWords = Abc_BitWordNum( nRegs + nRealPis * nFrames );
pCex = (Abc_Cex_t *)ABC_ALLOC( char, sizeof(Abc_Cex_t) + sizeof(unsigned) * nWords );
memset( pCex, 0, sizeof(Abc_Cex_t) + sizeof(unsigned) * nWords );
pCex->nRegs = nRegs;
pCex->nPis = nRealPis;
pCex->nBits = nRegs + nRealPis * nFrames;
return pCex;
}
/**Function*************************************************************
Synopsis [Make the trivial counter-example for the trivially asserted output.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Cex_t * Abc_CexMakeTriv( int nRegs, int nTruePis, int nTruePos, int iFrameOut )
{
Abc_Cex_t * pCex;
int iPo, iFrame;
assert( nRegs > 0 );
iPo = iFrameOut % nTruePos;
iFrame = iFrameOut / nTruePos;
// allocate the counter example
pCex = Abc_CexAlloc( nRegs, nTruePis, iFrame + 1 );
pCex->iPo = iPo;
pCex->iFrame = iFrame;
return pCex;
}
/**Function*************************************************************
Synopsis [Derives the counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Cex_t * Abc_CexCreate( int nRegs, int nPis, int * pArray, int iFrame, int iPo, int fSkipRegs )
{
Abc_Cex_t * pCex;
int i;
pCex = Abc_CexAlloc( nRegs, nPis, iFrame+1 );
pCex->iPo = iPo;
pCex->iFrame = iFrame;
if ( pArray == NULL )
return pCex;
if ( fSkipRegs )
{
for ( i = nRegs; i < pCex->nBits; i++ )
if ( pArray[i-nRegs] )
Abc_InfoSetBit( pCex->pData, i );
}
else
{
for ( i = 0; i < pCex->nBits; i++ )
if ( pArray[i] )
Abc_InfoSetBit( pCex->pData, i );
}
return pCex;
}
/**Function*************************************************************
Synopsis [Make the trivial counter-example for the trivially asserted output.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Cex_t * Abc_CexDup( Abc_Cex_t * p, int nRegsNew )
{
Abc_Cex_t * pCex;
int i;
if ( nRegsNew == -1 )
nRegsNew = p->nRegs;
pCex = Abc_CexAlloc( nRegsNew, p->nPis, p->iFrame+1 );
pCex->iPo = p->iPo;
pCex->iFrame = p->iFrame;
for ( i = p->nRegs; i < p->nBits; i++ )
if ( Abc_InfoHasBit(p->pData, i) )
Abc_InfoSetBit( pCex->pData, pCex->nRegs + i - p->nRegs );
return pCex;
}
/**Function*************************************************************
Synopsis [Derives CEX from comb model.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Cex_t * Abc_CexDeriveFromCombModel( int * pModel, int nPis, int nRegs, int iPo )
{
Abc_Cex_t * pCex;
int i;
pCex = Abc_CexAlloc( nRegs, nPis, 1 );
pCex->iPo = iPo;
pCex->iFrame = 0;
for ( i = 0; i < nPis; i++ )
if ( pModel[i] )
pCex->pData[i>>5] |= (1<<(i & 31));
return pCex;
}
/**Function*************************************************************
Synopsis [Derives CEX from comb model.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Cex_t * Abc_CexMerge( Abc_Cex_t * pCex, Abc_Cex_t * pPart, int iFrBeg, int iFrEnd )
{
Abc_Cex_t * pNew;
int nFramesGain;
int i, f, iBit;
if ( iFrBeg < 0 )
{ printf( "Starting frame is less than 0.\n" ); return NULL; }
if ( iFrEnd < 0 )
{ printf( "Stopping frame is less than 0.\n" ); return NULL; }
if ( iFrBeg > pCex->iFrame )
{ printf( "Starting frame is more than the last frame of CEX (%d).\n", pCex->iFrame ); return NULL; }
if ( iFrEnd > pCex->iFrame )
{ printf( "Stopping frame is more than the last frame of CEX (%d).\n", pCex->iFrame ); return NULL; }
if ( iFrBeg > iFrEnd )
{ printf( "Starting frame (%d) should be less than stopping frame (%d).\n", iFrBeg, iFrEnd ); return NULL; }
assert( iFrBeg >= 0 && iFrBeg <= pCex->iFrame );
assert( iFrEnd >= 0 && iFrEnd <= pCex->iFrame );
assert( iFrBeg <= iFrEnd );
assert( pCex->nPis == pPart->nPis );
assert( iFrEnd - iFrBeg + pPart->iPo >= pPart->iFrame );
nFramesGain = iFrEnd - iFrBeg + pPart->iPo - pPart->iFrame;
pNew = Abc_CexAlloc( pCex->nRegs, pCex->nPis, pCex->iFrame + 1 - nFramesGain );
pNew->iPo = pCex->iPo;
pNew->iFrame = pCex->iFrame - nFramesGain;
for ( iBit = 0; iBit < pCex->nRegs; iBit++ )
if ( Abc_InfoHasBit(pCex->pData, iBit) )
Abc_InfoSetBit( pNew->pData, iBit );
for ( f = 0; f < iFrBeg; f++ )
for ( i = 0; i < pCex->nPis; i++, iBit++ )
if ( Abc_InfoHasBit(pCex->pData, pCex->nRegs + pCex->nPis * f + i) )
Abc_InfoSetBit( pNew->pData, iBit );
for ( f = 0; f < pPart->iFrame; f++ )
for ( i = 0; i < pCex->nPis; i++, iBit++ )
if ( Abc_InfoHasBit(pPart->pData, pPart->nRegs + pCex->nPis * f + i) )
Abc_InfoSetBit( pNew->pData, iBit );
for ( f = iFrEnd; f <= pCex->iFrame; f++ )
for ( i = 0; i < pCex->nPis; i++, iBit++ )
if ( Abc_InfoHasBit(pCex->pData, pCex->nRegs + pCex->nPis * f + i) )
Abc_InfoSetBit( pNew->pData, iBit );
assert( iBit == pNew->nBits );
return pNew;
}
/**Function*************************************************************
Synopsis [Prints out the counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_CexPrintStats( Abc_Cex_t * p )
{
int k, Counter = 0;
if ( p == NULL )
{
printf( "The counter example is NULL.\n" );
return;
}
for ( k = 0; k < p->nBits; k++ )
Counter += Abc_InfoHasBit(p->pData, k);
printf( "CEX: iPo = %d iFrame = %d nRegs = %d nPis = %d nBits = %d nOnes = %5d (%5.2f %%)\n",
p->iPo, p->iFrame, p->nRegs, p->nPis, p->nBits, Counter, 100.0 * Counter / (p->nBits - p->nRegs) );
}
/**Function*************************************************************
Synopsis [Prints out the counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_CexPrint( Abc_Cex_t * p )
{
int i, f, k;
if ( p == NULL )
{
printf( "The counter example is NULL.\n" );
return;
}
Abc_CexPrintStats( p );
printf( "State : " );
for ( k = 0; k < p->nRegs; k++ )
printf( "%d", Abc_InfoHasBit(p->pData, k) );
printf( "\n" );
for ( f = 0; f <= p->iFrame; f++ )
{
printf( "Frame %3d : ", f );
for ( i = 0; i < p->nPis; i++ )
printf( "%d", Abc_InfoHasBit(p->pData, k++) );
printf( "\n" );
}
assert( k == p->nBits );
}
/**Function*************************************************************
Synopsis [Frees the counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_CexFreeP( Abc_Cex_t ** p )
{
if ( *p == NULL )
return;
ABC_FREE( *p );
}
/**Function*************************************************************
Synopsis [Frees the counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_CexFree( Abc_Cex_t * p )
{
ABC_FREE( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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