mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-11-04 13:29:11 +00:00
Code Activity

score the param probes, but i can't figure out how to access the relevant solver statistics fields from the statistics obj

Browse source
This commit is contained in:
Ilana Shapiro 2025-10-29 22:49:13 -07:00
parent bbf97c5e21
commit e72cf2ec09
2 changed files with 36 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/smt/smt_parallel.cpp
View file

@ -80,13 +80,22 @@ namespace smt {
return r;
}
void parallel::param_generator::replay_proof_prefixes(unsigned max_conflicts_epsilon=200) {
unsigned parallel::param_generator::replay_proof_prefixes(vector<smt_params> candidate_param_states, unsigned max_conflicts_epsilon=200) {
unsigned conflict_budget = m_max_prefix_conflicts + max_conflicts_epsilon;
// loop through m_param_probe_contexts
unsigned best_param_state_idx;
double best_score;
for (unsigned i = 0; i < m_param_probe_contexts.size(); ++i) {
IF_VERBOSE(1, verbose_stream() << " PARAM TUNER: replaying proof prefix in param probe context " << i << "\n");
context *probe_ctx = m_param_probe_contexts[i];
probe_ctx->get_fparams().m_max_conflicts = conflict_budget;
double score = 0.0;
// apply the ith param state to probe_ctx
smt_params params = candidate_param_states[i];
params_ref p;
params.updt_params(p);
probe_ctx->updt_params(p);
for (auto const& clause : probe_ctx->m_recorded_clauses) {
expr_ref_vector negated_lits(probe_ctx->m);
@ -100,8 +109,25 @@ namespace smt {
// Replay the negated clause
lbool r = probe_ctx->check(negated_lits.size(), negated_lits.data());
::statistics st;
probe_ctx->collect_statistics(st);
unsigned conflicts = 0, decisions = 0, rlimit = 0;
// I can't figure out how to access the statistics fields, I only see an update method
// st.get_uint("conflicts", conflicts);
// st.get_uint("decisions", decisions);
// st.get_uint("rlimit count", rlimit);
score += conflicts + decisions + rlimit;
}
if (i == 0 || score < best_score) {
best_score = score;
best_param_state_idx = i;
}
}
return best_param_state_idx;
}
void parallel::param_generator::protocol_iteration() {
@ -126,11 +152,13 @@ namespace smt {
candidate_param_states.push_back(mutate_param_state());
}
replay_proof_prefixes();
unsigned best_param_state_idx = replay_proof_prefixes(candidate_param_states);
if (best_param_state != m_param_state) {
IF_VERBOSE(1, verbose_stream() << " PARAM TUNER: no parameter mutation occurred, skipping update\n");
return;
if (best_param_state_idx != 0) {
best_param_state = candidate_param_states[best_param_state_idx];
IF_VERBOSE(1, verbose_stream() << " PARAM TUNER found better param state at index " << best_param_state_idx << "\n");
} else {
IF_VERBOSE(1, verbose_stream() << " PARAM TUNER retained current param state\n");
}
}
case l_true: {

2
src/smt/smt_parallel.h
View file

@ -187,7 +187,7 @@ namespace smt {
param_generator(parallel& p);
lbool run_prefix_step();
void protocol_iteration();
void replay_proof_prefixes(unsigned max_conflicts_epsilon);
unsigned replay_proof_prefixes(vector<smt_params> candidate_param_states, unsigned max_conflicts_epsilon);
reslimit& limit() {
return m.limit();