From 97bd9d8f1b1755422f65b288ee42a1d4ccb8b777 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Wed, 4 Jun 2014 11:40:37 -0700
Subject: Adding CEC command &splitprove.

---
 src/base/abci/abc.c      | 26 +++++++++++++++++++-------
 src/proof/cec/cecSplit.c | 13 +++++++------
 2 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index d4dede6d..017e931a 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -32876,10 +32876,10 @@ usage:
 ***********************************************************************/
 int Abc_CommandAbc9SplitProve( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
-    extern Gia_Man_t * Cec_GiaSplitTest( Gia_Man_t * p, int nTimeOut, int fVerbose );
-    int c, nTimeOut = 1, fVerbose = 0;
+    extern Gia_Man_t * Cec_GiaSplitTest( Gia_Man_t * p, int nTimeOut, int nIterMax, int fVerbose );
+    int c, nTimeOut = 1, nIterMax = 0, fVerbose = 0;
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "Tvh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "TIvh" ) ) != EOF )
     {
         switch ( c )
         {
@@ -32894,6 +32894,17 @@ int Abc_CommandAbc9SplitProve( Abc_Frame_t * pAbc, int argc, char ** argv )
             if ( nTimeOut <= 0 )
                 goto usage;
             break;
+        case 'I':
+            if ( globalUtilOptind >= argc )
+            {
+                Abc_Print( -1, "Command line switch \"-I\" should be followed by an integer.\n" );
+                goto usage;
+            }
+            nIterMax = atoi(argv[globalUtilOptind]);
+            globalUtilOptind++;
+            if ( nIterMax < 0 )
+                goto usage;
+            break;
         case 'v':
             fVerbose ^= 1;
             break;
@@ -32913,14 +32924,15 @@ int Abc_CommandAbc9SplitProve( Abc_Frame_t * pAbc, int argc, char ** argv )
         Abc_Print( -1, "Abc_CommandAbc9SplitProve(): The problem is sequential.\n" );
         return 1;
     }
-    Cec_GiaSplitTest( pAbc->pGia, nTimeOut, fVerbose );
+    Cec_GiaSplitTest( pAbc->pGia, nTimeOut, nIterMax, fVerbose );
     return 0;
 
 usage:
-    Abc_Print( -2, "usage: &splitprove [-T num] [-vh]\n" );
+    Abc_Print( -2, "usage: &splitprove [-TI num] [-vh]\n" );
     Abc_Print( -2, "\t         proves CEC problem by case-splitting\n" );
-    Abc_Print( -2, "\t-T num : runtime limit in seconds per subproblem [default = %d]\n", nTimeOut );
-    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-T num : runtime limit in seconds per subproblem [default = %d]\n",     nTimeOut );
+    Abc_Print( -2, "\t-I num : the max number of iterations (0 = infinity) [default = %d]\n", nIterMax );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",         fVerbose? "yes": "no" );
     Abc_Print( -2, "\t-h     : print the command usage\n");
     return 1;
 }
diff --git a/src/proof/cec/cecSplit.c b/src/proof/cec/cecSplit.c
index 7b33efc6..7ba3d51e 100644
--- a/src/proof/cec/cecSplit.c
+++ b/src/proof/cec/cecSplit.c
@@ -331,7 +331,7 @@ void Cec_GiaSplitPrint( int nIter, int Depth, int nVars, int nConfs, int fSatUns
     printf( "%6d : ",            nIter );
     printf( "Depth =%3d  ",      Depth );
     printf( "SatVar =%7d  ",     nVars );
-    printf( "SatConf =%7d  ",    nConfs );
+    printf( "SatConf =%7d   ",   nConfs );
     printf( "%s   ",             fSatUnsat ? "UNSAT    " : "UNDECIDED" );
     printf( "Progress = %.10f   ", Prog );
     Abc_PrintTime( 1, "Time", clk );
@@ -359,7 +359,7 @@ void Cec_GiaSplitPrintRefs( Gia_Man_t * p )
   SeeAlso     []
 
 ***********************************************************************/
-int Cec_GiaSplitTest( Gia_Man_t * p, int nTimeOut, int fVerbose )
+int Cec_GiaSplitTest( Gia_Man_t * p, int nTimeOut, int nIterMax, int fVerbose )
 {
     abctime clk, clkTotal = Abc_Clock();
     Gia_Man_t * pPart0, * pPart1, * pLast;
@@ -428,7 +428,7 @@ int Cec_GiaSplitTest( Gia_Man_t * p, int nTimeOut, int fVerbose )
                 Progress += 1.0 / pow(2, Depth + 1);
             if ( fVerbose )
                 Cec_GiaSplitPrint( nIter, Depth, nSatVars, nSatConfs, fSatUnsat, Progress, Abc_Clock() - clk );
-            if ( Vec_PtrSize(vStack) > 3 )
+            if ( nIterMax && Vec_PtrSize(vStack) >= nIterMax )
                 break;
         }
         if ( Vec_PtrSize(vStack) == 0 )
@@ -436,12 +436,13 @@ int Cec_GiaSplitTest( Gia_Man_t * p, int nTimeOut, int fVerbose )
     }
     Cec_GiaSplitClean( vStack );
     if ( RetValue == 0 )
-        printf( "Problem is SAT  " );
+        printf( "Problem is SAT " );
     else if ( RetValue == 1 )
-        printf( "Problem is UNSAT  " );
+        printf( "Problem is UNSAT " );
     else if ( RetValue == -1 )
-        printf( "Problem is UNDECIDED  " );
+        printf( "Problem is UNDECIDED " );
     else assert( 0 );
+    printf( "after %d case-splits.  ", nIter );
     Abc_PrintTime( 1, "Time", Abc_Clock() - clkTotal );
     return RetValue;
 }
-- 
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