fix #4907

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Z3Prover · Dec 20, 2020 · 259a8ff · 259a8ff
1 parent dd05c68
commit 259a8ff
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Showing 2 changed files with 5 additions and 3 deletions.
diff --git a/src/ast/rewriter/hoist_rewriter.cpp b/src/ast/rewriter/hoist_rewriter.cpp
@@ -130,7 +130,9 @@ br_status hoist_rewriter::mk_or(unsigned num_args, expr * const * es, expr_ref &
         }
         fmls.push_back(p);
     }
-    for (auto const& p : m_eqs) {
+    for (auto& p : m_eqs) {
+        if (m().is_value(p.first))
+            std::swap(p.first, p.second);
         m_subst.insert(p.first, p.second);
         fmls.push_back(m().mk_eq(p.first, p.second));
     }    

diff --git a/src/tactic/core/solve_eqs_tactic.cpp b/src/tactic/core/solve_eqs_tactic.cpp
@@ -687,15 +687,15 @@ class solve_eqs_tactic : public tactic {
             th_rewriter thrw(m());
             expr_ref tmp(m()), tmp2(m());
 
-            // TRACE("solve_eqs", g.display(tout););
+            TRACE("solve_eqs", g.display(tout););
             for (unsigned idx = 0; !g.inconsistent() && idx < size; idx++) {
                 checkpoint();
                 if (g.is_decided_unsat()) break;
                 expr* f = g.form(idx);
                 proof_ref pr1(m()), pr2(m());
                 thrw(f, tmp, pr1);
                 rw(tmp, tmp2, pr2);
-                TRACE("solve_eqs", tout << mk_pp(f, m()) << " " << tmp << "\n" << tmp2 
+                TRACE("solve_eqs", tout << mk_pp(f, m()) << "\n->\n" << tmp << "\n->\n" << tmp2 
                       << "\n" << pr1 << "\n" << pr2 << "\n" << mk_pp(g.pr(idx), m()) << "\n";);
                 pr1 = m().mk_transitivity(pr1, pr2);
                 if (!pr1) pr1 = g.pr(idx); else pr1 = m().mk_modus_ponens(g.pr(idx), pr1);