diff --git a/src/aig/gia/giaTranStoch.c b/src/aig/gia/giaTranStoch.c
index f7e473d0a..78dc1424d 100644
--- a/src/aig/gia/giaTranStoch.c
+++ b/src/aig/gia/giaTranStoch.c
@@ -80,6 +80,7 @@ struct Gia_ManTranStochParam {
   int fResetHop;
   int fTruth;
   int fNewLine;
+  Gia_Man_t * pExdc;
   int nVerbose;
 };
 
@@ -92,9 +93,9 @@ Gia_Man_t * Gia_ManTranStochOpt1( Gia_ManTranStochParam * p, Gia_Man_t * pOld )
   do {
     n = Gia_ManAndNum( pGia );
     if ( p->fTruth )
-      pNew = Gia_ManTransductionTt( pGia, (p->fMerge? 8: 7), !p->fCspf, p->nSeed++, 0, 0, 0, 0, NULL, p->fNewLine, p->nVerbose > 0? p->nVerbose - 1: 0 );
+      pNew = Gia_ManTransductionTt( pGia, (p->fMerge? 8: 7), !p->fCspf, p->nSeed++, 0, 0, 0, 0, p->pExdc, p->fNewLine, p->nVerbose > 0? p->nVerbose - 1: 0 );
     else
-      pNew = Gia_ManTransductionBdd( pGia, (p->fMerge? 8: 7), !p->fCspf, p->nSeed++, 0, 0, 0, 0, NULL, p->fNewLine, p->nVerbose > 0? p->nVerbose - 1: 0 );
+      pNew = Gia_ManTransductionBdd( pGia, (p->fMerge? 8: 7), !p->fCspf, p->nSeed++, 0, 0, 0, 0, p->pExdc, p->fNewLine, p->nVerbose > 0? p->nVerbose - 1: 0 );
     Gia_ManStop( pGia );
     pGia = pNew;    
     pNew = Gia_ManCompress2( pGia, 1, 0 );
@@ -152,7 +153,7 @@ Gia_Man_t * Gia_ManTranStochOpt3( Gia_ManTranStochParam * p, Gia_Man_t * pOld )
     p->nSeed = 1234 * (i + p->nSeedBase);
     pNew = Gia_ManTranStochOpt2( p, pOld );
     if ( p->nRestarts && p->nVerbose )
-      printf( "*  res %d               : #nodes = %5d\n", i, Gia_ManAndNum( pNew ) );
+      printf( "*  res %2d              : #nodes = %5d\n", i, Gia_ManAndNum( pNew ) );
     if ( n > Gia_ManAndNum( pNew ) ) {
       n = Gia_ManAndNum( pNew );
       Gia_ManStop( pBest );
@@ -164,7 +165,7 @@ Gia_Man_t * Gia_ManTranStochOpt3( Gia_ManTranStochParam * p, Gia_Man_t * pOld )
   return pBest;
 }
 
-Gia_Man_t * Gia_ManTranStoch( Gia_Man_t * pGia, int nRestarts, int nHops, int nSeedBase, int fCspf, int fMerge, int fResetHop, int fTruth, int fSingle, int fOriginalOnly, int fNewLine, int nVerbose ) {
+Gia_Man_t * Gia_ManTranStoch( Gia_Man_t * pGia, int nRestarts, int nHops, int nSeedBase, int fCspf, int fMerge, int fResetHop, int fTruth, int fSingle, int fOriginalOnly, int fNewLine, Gia_Man_t * pExdc, int nVerbose ) {
   int i, j = 0;
   Gia_Man_t * pNew, * pBest, * pStart;
   Abc_Ntk_t * pNtk, * pNtkRes; Vec_Ptr_t * vpStarts;
@@ -177,6 +178,7 @@ Gia_Man_t * Gia_ManTranStoch( Gia_Man_t * pGia, int nRestarts, int nHops, int nS
   p->fResetHop = fResetHop;
   p->fTruth = fTruth;
   p->fNewLine = fNewLine;
+  p->pExdc = pExdc;
   p->nVerbose = nVerbose;
   // setup start points
   vpStarts = Vec_PtrAlloc( 4 );
diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index f3c2e1635..cb403e315 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -42755,8 +42755,8 @@ usage:
 ***********************************************************************/
 int Abc_CommandAbc9TranStoch( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
-    extern Gia_Man_t * Gia_ManTranStoch( Gia_Man_t * pGia, int nRestarts, int nHops, int nSeedBase, int fCspf, int fMerge, int fResetHop, int fTruth, int fSingle, int fOriginalOnly, int fNewLine, int nVerbose );
-    Gia_Man_t * pTemp;
+    extern Gia_Man_t * Gia_ManTranStoch( Gia_Man_t * pGia, int nRestarts, int nHops, int nSeedBase, int fCspf, int fMerge, int fResetHop, int fTruth, int fSingle, int fOriginalOnly, int fNewLine, Gia_Man_t * pExdc, int nVerbose );
+    Gia_Man_t * pTemp, * pExdc = NULL;
     int c, nRestarts = 0, nHops = 10, nSeedBase = 0, fCspf = 0, fMerge = 1, fResetHop = 1, fTruth = 0, fSingle = 0, fOriginalOnly = 0, fNewLine = 0, nVerbose = 1;
     Extra_UtilGetoptReset();
     while ( ( c = Extra_UtilGetopt( argc, argv, "NMRVcmrtsonh" ) ) != EOF )
@@ -42825,18 +42825,41 @@ int Abc_CommandAbc9TranStoch( Abc_Frame_t * pAbc, int argc, char ** argv )
             goto usage;
         }
     }
+    if ( argc > globalUtilOptind + 1 )
+    {
+        Abc_Print( -1, "Wrong number of auguments.\n" );
+        goto usage;
+    }
     if ( pAbc->pGia == NULL )
     {
         Abc_Print( -1, "Empty GIA network.\n" );
         return 1;
     }
+    if ( argc == globalUtilOptind + 1 )
+    {
+        FILE * pFile = fopen( argv[globalUtilOptind], "rb" );
+        if ( pFile == NULL )
+        {
+            Abc_Print( -1, "Cannot open input file \"%s\". ", argv[globalUtilOptind] );
+            return 1;
+        }
+        fclose( pFile );
+        pExdc = Gia_AigerRead( argv[globalUtilOptind], 0, 0, 0 );
+        if ( pExdc == NULL )
+        {
+            Abc_Print( -1, "Reading AIGER has failed.\n" );
+            return 1;
+        }
+    }
 
-    pTemp = Gia_ManTranStoch( pAbc->pGia, nRestarts, nHops, nSeedBase, fCspf, fMerge, fResetHop, fTruth, fSingle, fOriginalOnly, fNewLine, nVerbose );
+    pTemp = Gia_ManTranStoch( pAbc->pGia, nRestarts, nHops, nSeedBase, fCspf, fMerge, fResetHop, fTruth, fSingle, fOriginalOnly, fNewLine, pExdc, nVerbose );
+    if ( pExdc != NULL )
+        Gia_ManStop( pExdc );
     Abc_FrameUpdateGia( pAbc, pTemp );
     return 0;
 
 usage:
-    Abc_Print( -2, "usage: &transtoch [-NMRV num] [-cmrtsonh]\n" );
+    Abc_Print( -2, "usage: &transtoch [-NMRV num] [-cmrtsonh] <file>\n" );
     Abc_Print( -2, "\t           iterates transduction with randomized parameters\n" );
     Abc_Print( -2, "\t-N num   : number of restarts [default = %d]\n", nRestarts );
     Abc_Print( -2, "\t-M num   : number of hops (if; mfs2; strash) [default = %d]\n", nHops );
@@ -42850,6 +42873,7 @@ usage:
     Abc_Print( -2, "\t-o       : toggles starting from the given AIG [default = %s]\n", fOriginalOnly? "yes": "no" );
     Abc_Print( -2, "\t-n       : toggles printing with a new line [default = %s]\n", fNewLine? "yes": "no" );
     Abc_Print( -2, "\t-h       : prints the command usage\n" );
+    Abc_Print( -2, "\t<file>   : AIGER specifying external don't-cares\n" );
     Abc_Print( -2, "\t\n" );
     Abc_Print( -2, "\t           This command was contributed by Yukio Miyasaka.\n" );
     return 1;