From af5e7a1c48d8e05c02792c75ba07124c65183bc2 Mon Sep 17 00:00:00 2001 From: Nikolaj Bjorner Date: Sat, 24 Apr 2021 10:28:22 -0700 Subject: [PATCH] #5211 --- src/sat/smt/euf_invariant.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/sat/smt/euf_invariant.cpp b/src/sat/smt/euf_invariant.cpp index ded31db60..c227148a3 100644 --- a/src/sat/smt/euf_invariant.cpp +++ b/src/sat/smt/euf_invariant.cpp @@ -48,8 +48,10 @@ namespace euf { if (s().inconsistent()) return; for (enode* n : m_egraph.nodes()) - if (m.is_false(n->get_root()->get_expr()) && m.is_eq(n->get_expr()) && - n->get_arg(0)->get_root() == n->get_arg(1)->get_root()) { + if (m.is_false(n->get_root()->get_expr()) && + m.is_eq(n->get_expr()) && + !m.is_bool(n->get_app()->get_arg(0)) && + (n->get_arg(0)->get_root() == n->get_arg(1)->get_root())) { enable_trace("euf"); TRACE("euf", display(tout << n->get_expr_id() << ": " << mk_pp(n->get_expr(), m) << "\n" << "#" << n->get_arg(0)->get_expr_id() << " == #" << n->get_arg(1)->get_expr_id() << " r: " << n->get_arg(0)->get_root_id() << "\n");