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add sls

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2014-08-12 19:24:31 -07:00
parent 1652c16163
commit 180b0d4ec9
8 changed files with 252 additions and 53 deletions
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44
src/opt/pb_sls.cpp
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@ -20,49 +20,11 @@ Notes:
#include "smt_literal.h"
#include "ast_pp.h"
#include "th_rewriter.h"
#include "sat_sls.h"
namespace smt {
struct pb_sls::imp {
struct index_set {
unsigned_vector m_elems;
unsigned_vector m_index;
unsigned num_elems() const { return m_elems.size(); }
void reset() { m_elems.reset(); m_index.reset(); }
bool empty() const { return m_elems.empty(); }
bool contains(unsigned idx) const {
return
(idx < m_index.size()) &&
(m_index[idx] < m_elems.size()) &&
(m_elems[m_index[idx]] == idx);
}
void insert(unsigned idx) {
m_index.reserve(idx+1);
if (!contains(idx)) {
m_index[idx] = m_elems.size();
m_elems.push_back(idx);
}
}
void remove(unsigned idx) {
if (!contains(idx)) return;
unsigned pos = m_index[idx];
m_elems[pos] = m_elems.back();
m_index[m_elems[pos]] = pos;
m_elems.pop_back();
}
unsigned choose(random_gen& rnd) const {
SASSERT(!empty());
return m_elems[rnd(num_elems())];
}
};
struct clause {
literal_vector m_lits;
scoped_mpz_vector m_weights;
@ -112,8 +74,8 @@ namespace smt {
expr_ref_vector m_trail;
obj_map<expr, unsigned> m_decl2var; // map declarations to Boolean variables.
ptr_vector<expr> m_var2decl; // reverse map
index_set m_hard_false; // list of hard clauses that are false.
index_set m_soft_false; // list of soft clauses that are false.
sat::index_set m_hard_false; // list of hard clauses that are false.
sat::index_set m_soft_false; // list of soft clauses that are false.
unsigned m_max_flips; // maximal number of flips
unsigned m_non_greedy_percent; // percent of moves to do non-greedy style
random_gen m_rng;