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z3str3: detect and give up when symbolic automaton construction fails (#4384)

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typically this will happen due to non-constant terms in a RegLan expression
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Murphy Berzish 2020-05-28 11:57:33 -05:00 • committed by GitHub
parent ccebd4db59
commit 71ea7287bb
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3 changed files with 28 additions and 7 deletions
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5
src/smt/theory_str.cpp
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@ -8594,7 +8594,10 @@ namespace smt {
}
}
solve_regex_automata();
if (!solve_regex_automata()) {
TRACE("str", tout << "regex engine requested to give up!" << std::endl;);
return FC_GIVEUP;
}
bool needToAssignFreeVars = false;
expr_ref_vector free_variables(m);