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update handling of contains constraints taking string literals into account

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-08-12 19:14:55 -07:00
parent c0bd40c00a
commit c4083c367a
2 changed files with 44 additions and 2 deletions
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src/ast/rewriter/seq_rewriter.h
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@ -122,6 +122,9 @@ class seq_rewriter {
br_status mk_re_loop(unsigned num_args, expr* const* args, expr_ref& result);
br_status mk_re_range(expr* lo, expr* hi, expr_ref& result);
bool cannot_contain_prefix(expr* a, expr* b);
bool cannot_contain_suffix(expr* a, expr* b);
bool set_empty(unsigned sz, expr* const* es, bool all, expr_ref_vector& lhs, expr_ref_vector& rhs);
bool is_subsequence(unsigned n, expr* const* l, unsigned m, expr* const* r,
expr_ref_vector& lhs, expr_ref_vector& rhs, bool& is_sat);