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fixes for #4688

Browse source 
https://github.com/Z3Prover/z3/issues/4866#issuecomment-778721073
This commit is contained in:
Nikolaj Bjorner 2021-04-11 17:42:12 -07:00
parent 2dcfe799bc
commit 804f065215
4 changed files with 59 additions and 6 deletions
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6
src/smt/theory_seq.cpp
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@ -1933,7 +1933,9 @@ model_value_proc * theory_seq::mk_value(enode * n, model_generator & mg) {
sv->add_string(c);
}
else {
sv->add_string(mk_value(to_app(c)));
app_ref val(mk_value(to_app(c)), m);
TRACE("seq", tout << "WARNING: " << val << " is prone to result in incorrect model\n";);
sv->add_string(val);
}
}
m_concat.shrink(start);
@ -2777,6 +2779,7 @@ bool theory_seq::propagate_eq(dependency* deps, literal_vector const& _lits, exp
literal_vector lits(_lits);
enode_pair_vector eqs;
linearize(deps, eqs, lits);
if (add_to_eqs) {
deps = mk_join(deps, _lits);
new_eq_eh(deps, n1, n2);
@ -3219,6 +3222,7 @@ void theory_seq::get_ite_concat(ptr_vector<expr>& concats, ptr_vector<expr>& tod
todo.pop_back();
e = m_rep.find(e);
e = get_ite_value(e);
e = m_rep.find(e);
if (m_util.str.is_concat(e, e1, e2)) {
todo.push_back(e2, e1);
}