3 files changed, 13 insertions, 10 deletions
diff --git a/src/opt/fxu/fxuInt.h b/src/opt/fxu/fxuInt.h
index bbceac47..402b7cdd 100644
--- a/src/opt/fxu/fxuInt.h
+++ b/src/opt/fxu/fxuInt.h
@@ -368,10 +368,9 @@ struct FxuSingle // 7 words
 // iterator through the cube pairs belonging to the given cube 
 #define Fxu_CubeForEachPair( pCube, pPair, i )\
   for ( i = 0;\
-        i < pCube->pVar->nCubes &&\
-        (((unsigned)(ABC_PTRUINT_T)(pPair = pCube->pVar->ppPairs[pCube->iCube][i])) >= 0);\
+        i < pCube->pVar->nCubes && (((pPair) = (pCube)->pVar->ppPairs[(pCube)->iCube][i]), 1);\
         i++ )\
-        if ( pPair )
+        if ( pPair == NULL ) {} else
 
 // iterator through all the items in the heap
 #define Fxu_HeapDoubleForEachItem( Heap, Div )\
diff --git a/src/opt/fxu/fxuReduce.c b/src/opt/fxu/fxuReduce.c
index 2321ec57..b0e3e4a7 100644
--- a/src/opt/fxu/fxuReduce.c
+++ b/src/opt/fxu/fxuReduce.c
@@ -67,7 +67,7 @@ int Fxu_PreprocessCubePairs( Fxu_Matrix * p, Vec_Ptr_t * vCovers, int nPairsTota
     assert( nPairsMax < nPairsTotal );
 
     // allocate storage for counter of diffs
-    pnLitsDiff = ABC_ALLOC( unsigned char, nPairsTotal );
+    pnLitsDiff = ABC_FALLOC( unsigned char, nPairsTotal );
     // go through the covers and precompute the distances between the pairs
     iPair    =  0;
     nBitsMax = -1;
@@ -86,7 +86,7 @@ int Fxu_PreprocessCubePairs( Fxu_Matrix * p, Vec_Ptr_t * vCovers, int nPairsTota
     assert( iPair == nPairsTotal );
 
     // allocate storage for counters of cube pairs by difference
-    pnPairCounters = ABC_ALLOC( int, 2 * nBitsMax );
+    pnPairCounters = ABC_FALLOC( int, 2 * nBitsMax );
     memset( pnPairCounters, 0, sizeof(int) * 2 * nBitsMax );
     // count the number of different pairs
     for ( k = 0; k < nPairsTotal; k++ )
@@ -95,11 +95,15 @@ int Fxu_PreprocessCubePairs( Fxu_Matrix * p, Vec_Ptr_t * vCovers, int nPairsTota
     // so that there would be exactly pPairsMax pairs
     if ( pnPairCounters[0] != 0 )
     {
+        ABC_FREE( pnLitsDiff );
+        ABC_FREE( pnPairCounters );
         printf( "The SOPs of the nodes are not cube-ABC_FREE. Run \"bdd; sop\" before \"fx\".\n" );
         return 0;
     }
     if ( pnPairCounters[1] != 0 )
     {
+        ABC_FREE( pnLitsDiff );
+        ABC_FREE( pnPairCounters );
         printf( "The SOPs of the nodes are not SCC-ABC_FREE. Run \"bdd; sop\" before \"fx\".\n" );
         return 0;
     }
diff --git a/src/opt/fxu/fxuSelect.c b/src/opt/fxu/fxuSelect.c
index a4e260c7..c9945926 100644
--- a/src/opt/fxu/fxuSelect.c
+++ b/src/opt/fxu/fxuSelect.c
@@ -57,12 +57,12 @@ void Fxu_MatrixGetDoubleVars( Fxu_Matrix * p, Fxu_Double * pDouble,
 int Fxu_Select( Fxu_Matrix * p, Fxu_Single ** ppSingle, Fxu_Double ** ppDouble )
 {
     // the top entries
-    Fxu_Single * pSingles[MAX_SIZE_LOOKAHEAD];
-    Fxu_Double * pDoubles[MAX_SIZE_LOOKAHEAD];
+    Fxu_Single * pSingles[MAX_SIZE_LOOKAHEAD] = {0};
+    Fxu_Double * pDoubles[MAX_SIZE_LOOKAHEAD] = {0};
     // the complements
-    Fxu_Double * pSCompl[MAX_SIZE_LOOKAHEAD];
-    Fxu_Single * pDComplS[MAX_SIZE_LOOKAHEAD];
-    Fxu_Double * pDComplD[MAX_SIZE_LOOKAHEAD];
+    Fxu_Double * pSCompl[MAX_SIZE_LOOKAHEAD] = {0};
+    Fxu_Single * pDComplS[MAX_SIZE_LOOKAHEAD] = {0};
+    Fxu_Double * pDComplD[MAX_SIZE_LOOKAHEAD] = {0};
     Fxu_Pair * pPair;
     int nSingles;
     int nDoubles;