From a31749966aa4c19a1c94dd8684fffdeea9b5baa8 Mon Sep 17 00:00:00 2001
From: trevor_hansen <trevor_hansen@e59a4935-1847-0410-ae03-e826735625c1>
Date: Mon, 11 Jan 2010 15:39:52 +0000
Subject: [PATCH] Bugfix. Simplifying minisat not setting a return code as
 expected. Copied from my branch r517.

git-svn-id: https://stp-fast-prover.svn.sourceforge.net/svnroot/stp-fast-prover/trunk/stp@552 e59a4935-1847-0410-ae03-e826735625c1
---
 src/sat/simp/SimpSolver.C | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/sat/simp/SimpSolver.C b/src/sat/simp/SimpSolver.C
index 03b1990..4a3cf10 100644
--- a/src/sat/simp/SimpSolver.C
+++ b/src/sat/simp/SimpSolver.C
@@ -110,6 +110,13 @@ bool SimpSolver::solve(const vec<Lit>& assumps, bool do_simp, bool turn_off_simp
         for (int i = 0; i < extra_frozen.size(); i++)
             setFrozen(extra_frozen[i], false);
 
+    // STP MODIFICATION..
+    // If eliminate(bool) finds that the formula is unsatisfiable. ok may not be set.
+    // We use okay() to check if the function was satisfiable.
+    if (!result)
+		ok=false;
+    // STP MODIFICATION..
+
     return result;
 }
 
-- 
2.47.3