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tune handling of contains, avoid redundant equalities, merge use of indexof.left/right with contains.left/right adding only least-ness constraints in the context of index

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-02-27 09:56:11 -08:00
parent 1c630ccc9a
commit e659845bc0
2 changed files with 27 additions and 12 deletions
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12
src/smt/theory_seq.h
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@ -28,6 +28,7 @@ Revision History:
#include "scoped_ptr_vector.h"
#include "automaton.h"
#include "seq_rewriter.h"
#include "union_find.h"
namespace smt {
@ -44,6 +45,7 @@ namespace smt {
typedef trail_stack<theory_seq> th_trail_stack;
typedef std::pair<expr*, dependency*> expr_dep;
typedef obj_map<expr, expr_dep> eqdep_map_t;
typedef union_find<theory_seq> th_union_find;
class seq_value_proc;
@ -292,7 +294,8 @@ namespace smt {
scoped_vector<eq> m_eqs; // set of current equations.
scoped_vector<ne> m_nqs; // set of current disequalities.
scoped_vector<nc> m_ncs; // set of non-contains constraints.
unsigned m_eq_id;
unsigned m_eq_id;
th_union_find m_find;
seq_factory* m_factory; // value factory
exclusion_table m_exclude; // set of asserted disequalities.
@ -309,7 +312,7 @@ namespace smt {
arith_util m_autil;
th_trail_stack m_trail_stack;
stats m_stats;
symbol m_prefix, m_suffix, m_contains_left, m_contains_right, m_accept, m_reject;
symbol m_prefix, m_suffix, m_accept, m_reject;
symbol m_tail, m_nth, m_seq_first, m_seq_last, m_indexof_left, m_indexof_right, m_aut_step;
symbol m_pre, m_post, m_eq;
ptr_vector<expr> m_todo;
@ -539,6 +542,11 @@ namespace smt {
// model building
app* mk_value(app* a);
th_trail_stack& get_trail_stack() { return m_trail_stack; }
void merge_eh(theory_var, theory_var, theory_var v1, theory_var v2) {}
void after_merge_eh(theory_var r1, theory_var r2, theory_var v1, theory_var v2) { }
void unmerge_eh(theory_var v1, theory_var v2) {}
};
};