From e23dd881fb64403ca46823398b722e6d19c87768 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Tue, 29 Oct 2013 12:30:16 -0700
Subject: Wrapper around the BMC engine to restart it with higher resource
 limits.

---
 src/sat/bmc/bmcBmcAnd.c | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

(limited to 'src/sat')

diff --git a/src/sat/bmc/bmcBmcAnd.c b/src/sat/bmc/bmcBmcAnd.c
index d69c05ae..e6200667 100644
--- a/src/sat/bmc/bmcBmcAnd.c
+++ b/src/sat/bmc/bmcBmcAnd.c
@@ -953,7 +953,7 @@ Cnf_Dat_t * Cnf_DeriveGia( Gia_Man_t * p )
   SeeAlso     []
 
 ***********************************************************************/
-int Gia_ManBmcPerform( Gia_Man_t * pGia, Bmc_AndPar_t * pPars )
+int Gia_ManBmcPerformInt( Gia_Man_t * pGia, Bmc_AndPar_t * pPars )
 {
     Bmc_Mna_t * p;
     Gia_Man_t * pTemp;
@@ -1050,6 +1050,43 @@ int Gia_ManBmcPerform( Gia_Man_t * pGia, Bmc_AndPar_t * pPars )
     return RetValue;
 }
 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Gia_ManBmcPerform( Gia_Man_t * pGia, Bmc_AndPar_t * pPars )
+{
+    abctime TimeToStop = pPars->nTimeOut ? pPars->nTimeOut * CLOCKS_PER_SEC + Abc_Clock() : 0;
+    if ( pPars->nFramesAdd == 0 )
+        return Gia_ManBmcPerformInt( pGia, pPars );
+    // iterate over the engine until we read the global timeout
+    assert( pPars->nTimeOut >= 0 );
+    while ( 1 )
+    {
+        if ( TimeToStop && TimeToStop < Abc_Clock() )
+            return -1;
+        if ( Gia_ManBmcPerformInt( pGia, pPars ) == 0 )
+            return 0;
+        // set the new runtime limit
+        if ( pPars->nTimeOut )
+        {
+            pPars->nTimeOut = Abc_MinInt( pPars->nTimeOut-1, (int)((TimeToStop - Abc_Clock()) / CLOCKS_PER_SEC) );
+            if ( pPars->nTimeOut <= 0 )
+                return -1;
+        }
+        // set the new frames limit
+        pPars->nFramesAdd *= 2;
+    }
+    return -1;
+}
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////
-- 
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