From: Dejan Jovanović <dejan.jovanovic@gmail.com>
Date: Sun, 10 Jul 2011 12:32:13 +0000 (+0000)
Subject: yet another uf bug fix, hopefully the last
X-Git-Tag: cvc5-1.0.0~8514
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b7ae17461d929f64e34d5a69afaaac2885ca3b66;p=cvc5.git

yet another uf bug fix, hopefully the last
---

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: