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string to regex approximation used to strengthen membership constraints (#4610)

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* string to regex approximation used to strengthen membership constraints

* fixed pull request comments
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Margus Veanes 2020-08-01 16:45:00 -07:00 • committed by GitHub
parent fb035c0634
commit 8137143ada
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4 changed files with 98 additions and 3 deletions
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src/smt/seq_regex.h
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@ -75,6 +75,9 @@ namespace smt {
bool is_string_equality(literal lit);
// Get a regex which overapproximates a given string
expr_ref get_overapprox_regex(expr* s);
void rewrite(expr_ref& e);
bool coallesce_in_re(literal lit);