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avoid crashes in cases like wildcard-matching-regex-67.smt2, need regex constraint solving

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-04-21 05:44:53 +02:00
parent e172aa370d
commit c18188cba8
1 changed files with 9 additions and 0 deletions
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9
src/smt/theory_nseq.cpp
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@ -656,6 +656,13 @@ namespace smt {
return FC_DONE;
}
if (!has_eq_or_mem && has_unhandled_preds()) {
TRACE(seq, tout << "nielsen root if null\n");
// this can happen for regex constraint only benchmarks
// qf_s\20250410-matching\wildcard-matching-regex-67.smt2
return FC_GIVEUP;
}
populate_nielsen_graph();
// assert length constraints derived from string equalities
@ -664,6 +671,8 @@ namespace smt {
return FC_CONTINUE;
}
SASSERT(m_nielsen.root());
m_nielsen.assert_node_new_int_constraints(m_nielsen.root());
++m_num_final_checks;