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fixed bug #5343 and did some related optimizations (#5411)

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Margus Veanes 2021-07-15 13:28:59 -07:00 • committed by GitHub
parent c7a7d40a8f
commit 8e9bc86c23
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2 changed files with 35 additions and 12 deletions
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6
src/smt/seq_regex.cpp
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@ -272,13 +272,15 @@ namespace smt {
<< "PA(" << mk_pp(s, m) << "@" << idx
<< "," << state_str(r) << ") ";);
if (re().is_empty(r)) {
auto info = re().get_info(r);
//if the minlength of the regex is UINT_MAX then the regex is a deadend
if (re().is_empty(r) || info.min_length == UINT_MAX) {
STRACE("seq_regex_brief", tout << "(empty) ";);
th.add_axiom(~lit);
return;
}
auto info = re().get_info(r);
if (info.interpreted) {
update_state_graph(r);