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tuning based on benchmarks from Robert White

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2014-05-05 14:43:06 -07:00
parent 182fea2d7b
commit 25ad9d2ee1
5 changed files with 65 additions and 40 deletions
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7
src/opt/pb_sls.cpp
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@ -90,6 +90,8 @@ namespace smt {
struct stats {
stats() { reset(); }
void reset() { memset(this, 0, sizeof(*this)); }
unsigned m_num_flips;
unsigned m_num_improvements;
};
ast_manager& m;
@ -116,6 +118,7 @@ namespace smt {
unsigned m_non_greedy_percent; // percent of moves to do non-greedy style
random_gen m_rng;
scoped_mpz one;
stats m_stats;
imp(ast_manager& m):
m(m),
@ -238,6 +241,8 @@ namespace smt {
}
void collect_statistics(::statistics& st) const {
st.update("sls.num_flips", m_stats.m_num_flips);
st.update("sls.num_improvements", m_stats.m_num_improvements);
}
void updt_params(params_ref& p) {
@ -347,6 +352,7 @@ namespace smt {
}
literal flip() {
m_stats.m_num_flips++;
literal result;
if (m_hard_false.empty()) {
result = flip_soft();
@ -359,6 +365,7 @@ namespace smt {
m_best_assignment.reset();
m_best_assignment.append(m_assignment);
m_best_penalty = m_penalty;
m_stats.m_num_improvements++;
init_max_flips();
}
if (!m_assignment[result.var()]) {