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add detection of string equalities

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-29 10:40:47 -07:00
parent e0130f5cf4
commit 3d9d52f742
3 changed files with 37 additions and 15 deletions
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2
src/ast/rewriter/seq_rewriter.cpp
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@ -2398,8 +2398,6 @@ bool seq_rewriter::non_overlap(expr_ref_vector const& p1, expr_ref_vector const&
*/
bool seq_rewriter::rewrite_contains_pattern(expr* a, expr* b, expr_ref& result) {
vector<expr_ref_vector> patterns;
expr* x = nullptr, *y = nullptr, *z = nullptr, *u = nullptr;
if (!str().is_concat(a, x, y))