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add equality propagation based on partial length information to sequence theory. Fix issue #429

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-02-04 08:12:46 -08:00
parent 9b979b6e1e
commit 9c7e5c37d1
8 changed files with 200 additions and 44 deletions
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1
src/ast/rewriter/seq_rewriter.h
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@ -113,6 +113,7 @@ class seq_rewriter {
bool is_sequence(expr* e, expr_ref_vector& seq);
bool is_sequence(eautomaton& aut, expr_ref_vector& seq);
bool is_epsilon(expr* e) const;
void split_units(expr_ref_vector& lhs, expr_ref_vector& rhs);
public:
seq_rewriter(ast_manager & m, params_ref const & p = params_ref()):