From b7ae17461d929f64e34d5a69afaaac2885ca3b66 Mon Sep 17 00:00:00 2001
From: Dejan Jovanović <dejan.jovanovic@gmail.com>
Date: Sun, 10 Jul 2011 12:32:13 +0000
Subject: yet another uf bug fix, hopefully the last

---
 src/theory/uf/theory_uf.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/theory/uf')

diff --git a/src/theory/uf/theory_uf.cpp b/src/theory/uf/theory_uf.cpp
index 438854a9a..409edc53a 100644
--- a/src/theory/uf/theory_uf.cpp
+++ b/src/theory/uf/theory_uf.cpp
@@ -65,6 +65,16 @@ void TheoryUF::check(Effort level) {
     case kind::NOT:
       if (assertion[0].getKind() == kind::APPLY_UF) {
         d_equalityEngine.addEquality(assertion[0], d_false, assertion);
+      } else {
+        // disequality
+        TNode equality = assertion[0];
+        if (d_equalityEngine.getRepresentative(equality[0]) == d_equalityEngine.getRepresentative(equality[1])) {
+          std::vector<TNode> assumptions;
+          assumptions.push_back(assertion);
+          explain(equality, assumptions);
+          d_conflictNode = mkAnd(assumptions);
+          d_conflict = true;
+        }
       }
       break;
     default:
-- 
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