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fix #4912

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This commit is contained in:
Nikolaj Bjorner 2020-12-23 15:04:14 -08:00
parent 6284f6fb03
commit 2679ae517b
1 changed files with 8 additions and 1 deletions
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9
src/tactic/core/solve_eqs_tactic.cpp
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@ -549,12 +549,19 @@ class solve_eqs_tactic : public tactic {
bool is_path_compatible(expr_mark& occ, svector<lbool>& cache, vector<nnf_context> const & path, expr* v, expr* eq) {
bool all_e = true;
auto is_marked = [&](expr* e) {
if (occ.is_marked(e))
return true;
if (m().is_not(e, e) && occ.is_marked(e))
return true;
return false;
};
for (unsigned i = path.size(); i-- > 0; ) {
auto const& p = path[i];
auto const& args = p.m_args;
if (p.m_is_and && !all_e) {
for (unsigned j = 0; j < args.size(); ++j) {
if (j != p.m_index && occ.is_marked(args[j])) {
if (j != p.m_index && is_marked(args[j])) {
TRACE("solve_eqs", tout << "occurs and " << mk_pp(eq, m()) << " " << mk_pp(args[j], m()) << "\n";);
return false;
}