Improvements to false path detection.

src/aig/gia/giaFalse.c

@@ -390,8 +390,8 @@ Gia_Man_t * Gia_ManCheckOne( Gia_Man_t * p, int iOut, int iObj, int nTimeOut, in
     // add CNF for the path
     Gia_ManForEachObjVec( vPath, p, pObj, i )
     {
-        if ( Gia_ObjIsAnd(pObj) )
-        {
+        if ( !Gia_ObjIsAnd(pObj) )
+            continue;
         assert( i > 0 );
         pFanin = Gia_ManObj( p, Vec_IntEntry(vPath, i-1) );
         if ( pFanin == Gia_ObjFanin0(pObj) )
@@ -414,10 +414,6 @@ Gia_Man_t * Gia_ManCheckOne( Gia_Man_t * p, int iOut, int iObj, int nTimeOut, in
         }
         else assert( 0 );
         sat_solver_add_xor( pSat, i, i + 1*Vec_IntSize(vPath), i + 2*Vec_IntSize(vPath), 0 );
-        }
-        else if ( Gia_ObjIsCi(pObj) )
-            sat_solver_add_xor( pSat, i, pObj->Value + Shift[0], pObj->Value + Shift[1], 0 );
-        else assert( 0 );
         Vec_IntPush( vLits, Abc_Var2Lit(i, 0) );
     }
     // call the SAT solver