diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index 551bb74e5..1a4b58d1e 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -39198,10 +39198,21 @@ int Abc_CommandAbc9SimGen( Abc_Frame_t * pAbc, int argc, char ** argv )
     int c;
     Cec_SimGenSetParDefault( pPars );
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "OSstiwvV" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "EOSstiwvV" ) ) != EOF )
     {
         switch ( c )
         {
+        case 'E':
+            if ( globalUtilOptind >= argc )
+            {
+                Abc_Print( -1, "Command line switch \"-E\" should be followed by an integer.\n" );
+                goto usage;
+            }
+            pPars->expId = atoi(argv[globalUtilOptind]);
+            globalUtilOptind++;
+            if ( pPars->expId < 0 )
+                goto usage;
+            break;
         case 'O':
             if ( globalUtilOptind >= argc )
             {
diff --git a/src/proof/cec/cec.h b/src/proof/cec/cec.h
index e14ecabe2..ae9f5122c 100644
--- a/src/proof/cec/cec.h
+++ b/src/proof/cec/cec.h
@@ -207,6 +207,7 @@ struct Cec_ParSimGen_t_
 {
     int              fVerbose;          // verbose flag
     int              fVeryVerbose;      // verbose flag
+    int              expId;             // experiment ID for SimGen
     int              bitwidthOutgold;   // bitwidth of the output gold
     int              bitwidthSim;       // bitwidth of the simulation vectors
     int              nMaxStep;          // maximum number of SimGen steps