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seq bug fixes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-26 07:21:31 -08:00
parent 924f03c6de
commit 345f6e87bd
4 changed files with 329 additions and 162 deletions
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22
src/smt/theory_seq.h
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@ -45,6 +45,8 @@ namespace smt {
typedef std::pair<expr*, dependency*> expr_dep;
typedef obj_map<expr, expr_dep> eqdep_map_t;
class seq_value_proc;
// cache to track evaluations under equalities
class eval_cache {
eqdep_map_t m_map;
@ -138,8 +140,7 @@ namespace smt {
m_util.str.get_concat(l, ls);
m_util.str.get_concat(r, rs);
return eq(m_eq_id++, ls, rs, dep);
}
}
class ne {
vector<expr_ref_vector> m_lhs;
@ -355,6 +356,7 @@ namespace smt {
bool add_solution(expr* l, expr* r, dependency* dep);
bool is_nth(expr* a) const;
bool is_tail(expr* a, expr*& s, unsigned& idx) const;
bool is_eq(expr* e, expr*& a, expr*& b) const;
expr_ref mk_nth(expr* s, expr* idx);
expr_ref mk_last(expr* e);
expr_ref mk_first(expr* e);
@ -385,7 +387,7 @@ namespace smt {
void add_in_re_axiom(expr* n);
literal mk_literal(expr* n);
literal mk_eq_empty(expr* n);
literal mk_equals(expr* a, expr* b);
literal mk_seq_eq(expr* a, expr* b);
void tightest_prefix(expr* s, expr* x, literal lit, literal lit2 = null_literal);
expr_ref mk_sub(expr* a, expr* b);
enode* ensure_enode(expr* a);
@ -421,12 +423,14 @@ namespace smt {
bool is_step(expr* e, expr*& s, expr*& tail, expr*& re, expr*& i, expr*& j, expr*& t) const;
bool is_step(expr* e) const;
void propagate_step(literal lit, expr* n);
bool add_reject2reject(expr* rej);
bool add_accept2step(expr* acc);
bool add_step2accept(expr* step);
bool add_prefix2prefix(expr* e);
bool add_suffix2suffix(expr* e);
bool add_contains2contains(expr* e);
bool add_reject2reject(expr* rej, bool& change);
bool add_accept2step(expr* acc, bool& change);
bool add_step2accept(expr* step, bool& change);
bool add_prefix2prefix(expr* e, bool& change);
bool add_suffix2suffix(expr* e, bool& change);
bool add_contains2contains(expr* e, bool& change);
void propagate_not_prefix(expr* e);
void propagate_not_suffix(expr* e);
void ensure_nth(literal lit, expr* s, expr* idx);
bool canonizes(bool sign, expr* e);
void propagate_non_empty(literal lit, expr* s);