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patch seq theory using purification to avoid unsoundness caused by interaction with canonization and rewriting

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2021-02-14 17:40:41 -08:00
parent 2db2767e7a
commit 70b4822571
6 changed files with 45 additions and 42 deletions
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src/smt/seq_axioms.h
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@ -57,9 +57,7 @@ namespace smt {
bool is_drop_last(expr* s, expr* i, expr* l);
bool is_tail(expr* s, expr* i, expr* l);
bool is_extract_prefix0(expr* s, expr* i, expr* l);
bool is_extract_suffix(expr* s, expr* i, expr* l);
void add_extract_prefix_axiom(expr* e, expr* s, expr* l);
void add_extract_suffix_axiom(expr* e, expr* s, expr* i);
void tightest_prefix(expr* s, expr* x);
void ensure_digit_axiom();
public: