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improving performance for length constraints

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-29 11:32:52 -08:00
parent e96f9de70b
commit 67f22d8d65
7 changed files with 142 additions and 124 deletions
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11
src/smt/theory_seq.h
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@ -19,9 +19,7 @@ Revision History:
#ifndef THEORY_SEQ_H_
#define THEORY_SEQ_H_
#include "smt/smt_theory.h"
#include "ast/seq_decl_plugin.h"
#include "smt/theory_seq_empty.h"
#include "ast/rewriter/th_rewriter.h"
#include "ast/ast_trail.h"
#include "util/scoped_vector.h"
@ -30,6 +28,9 @@ Revision History:
#include "ast/rewriter/seq_rewriter.h"
#include "util/union_find.h"
#include "util/obj_ref_hashtable.h"
#include "smt/smt_theory.h"
#include "smt/smt_arith_value.h"
#include "smt/theory_seq_empty.h"
namespace smt {
@ -344,13 +345,15 @@ namespace smt {
bool m_incomplete; // is the solver (clearly) incomplete for the fragment.
expr_ref_vector m_int_string;
obj_map<expr, rational> m_si_axioms;
obj_hashtable<expr> m_length; // is length applied
obj_hashtable<expr> m_has_length; // is length applied
expr_ref_vector m_length; // length applications themselves
scoped_ptr_vector<apply> m_replay; // set of actions to replay
model_generator* m_mg;
th_rewriter m_rewrite;
seq_rewriter m_seq_rewrite;
seq_util m_util;
arith_util m_autil;
arith_value m_arith_value;
th_trail_stack m_trail_stack;
stats m_stats;
symbol m_prefix, m_suffix, m_accept, m_reject;
@ -557,7 +560,7 @@ namespace smt {
bool is_extract_suffix(expr* s, expr* i, expr* l);
bool has_length(expr *e) const { return m_length.contains(e); }
bool has_length(expr *e) const { return m_has_length.contains(e); }
void add_length(expr* e);
void enforce_length(expr* n);
bool enforce_length(expr_ref_vector const& es, vector<rational>& len);