1 files changed, 174 insertions, 0 deletions
diff --git a/src/abc8/aig/aigInter.c b/src/abc8/aig/aigInter.c
new file mode 100644
index 00000000..b3bc28b2
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+++ b/src/abc8/aig/aigInter.c
@@ -0,0 +1,174 @@
+/**CFile****************************************************************
+
+  FileName    [aigInter.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [AIG package.]
+
+  Synopsis    [Interpolate two AIGs.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - April 28, 2007.]
+
+  Revision    [$Id: aigInter.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "aig.h"
+#include "cnf.h"
+#include "satStore.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Aig_Man_t * Aig_ManInter( Aig_Man_t * pManOn, Aig_Man_t * pManOff, int fVerbose )
+{
+    void * pSatCnf = NULL;
+    Inta_Man_t * pManInter;
+    Aig_Man_t * pRes;
+    sat_solver * pSat;
+    Cnf_Dat_t * pCnfOn, * pCnfOff;
+    Vec_Int_t * vVarsAB;
+    Aig_Obj_t * pObj, * pObj2;
+    int Lits[3], status, i;
+    int clk = clock();
+
+    assert( Aig_ManPiNum(pManOn) == Aig_ManPiNum(pManOff) );
+
+    // derive CNFs
+    pCnfOn  = Cnf_Derive( pManOn, 0 );
+    pCnfOff = Cnf_Derive( pManOff, 0 );
+//    pCnfOn  = Cnf_DeriveSimple( pManOn, 0 );
+//    pCnfOff = Cnf_DeriveSimple( pManOff, 0 );
+    Cnf_DataLift( pCnfOff, pCnfOn->nVars );
+
+    // start the solver
+    pSat = sat_solver_new();
+    sat_solver_store_alloc( pSat );
+    sat_solver_setnvars( pSat, pCnfOn->nVars + pCnfOff->nVars );
+
+    // add clauses of A
+    for ( i = 0; i < pCnfOn->nClauses; i++ )
+    {
+        if ( !sat_solver_addclause( pSat, pCnfOn->pClauses[i], pCnfOn->pClauses[i+1] ) )
+        {
+            Cnf_DataFree( pCnfOn );
+            Cnf_DataFree( pCnfOff );
+            sat_solver_delete( pSat );
+            return NULL;
+        }
+    }
+    sat_solver_store_mark_clauses_a( pSat );
+
+    // add clauses of B
+    for ( i = 0; i < pCnfOff->nClauses; i++ )
+    {
+        if ( !sat_solver_addclause( pSat, pCnfOff->pClauses[i], pCnfOff->pClauses[i+1] ) )
+        {
+            Cnf_DataFree( pCnfOn );
+            Cnf_DataFree( pCnfOff );
+            sat_solver_delete( pSat );
+            return NULL;
+        }
+    }
+
+    // add PI clauses
+    // collect the common variables
+    vVarsAB = Vec_IntAlloc( Aig_ManPiNum(pManOn) );
+    Aig_ManForEachPi( pManOn, pObj, i )
+    {
+        Vec_IntPush( vVarsAB, pCnfOn->pVarNums[pObj->Id] );
+        pObj2 = Aig_ManPi( pManOff, i );
+
+        Lits[0] = toLitCond( pCnfOn->pVarNums[pObj->Id], 0 );
+        Lits[1] = toLitCond( pCnfOff->pVarNums[pObj2->Id], 1 );
+        if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
+            assert( 0 );
+        Lits[0] = toLitCond( pCnfOn->pVarNums[pObj->Id], 1 );
+        Lits[1] = toLitCond( pCnfOff->pVarNums[pObj2->Id], 0 );
+        if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
+            assert( 0 );
+    }
+    Cnf_DataFree( pCnfOn );
+    Cnf_DataFree( pCnfOff );
+    sat_solver_store_mark_roots( pSat );
+    if ( fVerbose )
+    {
+        PRT( "Prepare", clock() - clk );
+    }
+
+/*
+    status = sat_solver_simplify(pSat);
+    if ( status == 0 )
+    {
+        Vec_IntFree( vVarsAB );
+        Cnf_DataFree( pCnfOn );
+        Cnf_DataFree( pCnfOff );
+        sat_solver_delete( pSat );
+        return NULL;
+    }
+*/
+
+    // solve the problem
+    clk = clock();
+    status = sat_solver_solve( pSat, NULL, NULL, (sint64)0, (sint64)0, (sint64)0, (sint64)0 );
+    if ( fVerbose )
+    {
+        PRT( "Solving", clock() - clk );
+    }
+    if ( status == l_False )
+    {
+        pSatCnf = sat_solver_store_release( pSat );
+//        printf( "unsat\n" );
+    }
+    else if ( status == l_True )
+    {
+//        printf( "sat\n" );
+    }
+    else
+    {
+//        printf( "undef\n" );
+    }
+    sat_solver_delete( pSat );
+    if ( pSatCnf == NULL )
+    {
+        printf( "The SAT problem is not unsat.\n" );
+        Vec_IntFree( vVarsAB );
+        return NULL;
+    }
+
+    // create the resulting manager
+    pManInter = Inta_ManAlloc();
+    pRes = Inta_ManInterpolate( pManInter, pSatCnf, vVarsAB, fVerbose );
+    Inta_ManFree( pManInter );
+
+    Vec_IntFree( vVarsAB );
+    Sto_ManFree( pSatCnf );
+    return pRes;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+