fix variable tracking bug in explanations with literals

Z3Prover · Sep 2, 2022 · e4ef171 · e4ef171
1 parent eb1ea94
commit e4ef171
Show file tree

Hide file tree

Showing 2 changed files with 4 additions and 3 deletions.
diff --git a/src/sat/smt/euf_internalize.cpp b/src/sat/smt/euf_internalize.cpp
@@ -167,7 +167,7 @@ namespace euf {
             lit = lit2;
         }
 
-        TRACE("euf", tout << "attach " << v << " " << mk_bounded_pp(e, m) << "\n";);
+        TRACE("euf", tout << "attach v" << v << " " << mk_bounded_pp(e, m) << "\n";);
         m_bool_var2expr.reserve(v + 1, nullptr);
         if (m_bool_var2expr[v] && m_egraph.find(e)) {
             if (m_egraph.find(e)->bool_var() != v) {

diff --git a/src/sat/smt/euf_proof.cpp b/src/sat/smt/euf_proof.cpp
@@ -83,10 +83,11 @@ namespace euf {
         expr_ref_vector eqs(m);
         unsigned nv = s().num_vars();
         auto add_lit = [&](enode_pair const& eq) {
+            unsigned v = nv;
             ++nv;
             eqs.push_back(m.mk_eq(eq.first->get_expr(), eq.second->get_expr()));
-            set_tmp_bool_var(nv, eqs.back());
-            return literal(nv, false);
+            set_tmp_bool_var(v, eqs.back());
+            return literal(v, false);
         };
 
         for (auto lit : euf::th_explain::lits(jst))