mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2026-02-22 00:07:36 +00:00
Code Activity

modify backoff mechanisms and theory exchange

Browse source
This commit is contained in:
Nikolaj Bjorner 2025-01-22 20:32:30 -08:00
parent 3a3e176dce
commit ec3915218d
8 changed files with 60 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

19
src/ast/sls/sls_arith_clausal.cpp
View file

@ -218,8 +218,12 @@ namespace sls {
m_best_delta = 0;
m_best_abs_value = num_t(-1);
m_best_last_step = UINT_MAX;
m_num_lookaheads = 0;
for (auto const& u : a.m_updates)
lookahead(u.m_var, u.m_delta);
// verbose_stream() << a.m_updates.size() << " " << m_num_lookaheads << " lookaheads\n";
ctx.rlimit().inc(1 + m_num_lookaheads/10);
critical_move(m_best_var, m_best_delta, mt);
return m_best_var;
}
@ -247,11 +251,11 @@ namespace sls {
m_last_delta = delta;
if (!a.can_update_num(v, delta))
return;
ctx.rlimit().inc();
auto score = get_score(v, delta);
auto& vi = a.m_vars[v];
num_t abs_value = abs(vi.value() + delta);
unsigned last_step = vi.last_step(delta);
++m_num_lookaheads;
if (score < a.m_best_score)
return;
if (score > a.m_best_score ||
@ -338,10 +342,21 @@ namespace sls {
template<typename num_t>
void arith_clausal<num_t>::check_restart() {
if (m_no_improve <= 500000)
return;
#if 0
if (a.m_stats.m_steps < a.m_config.restart_next)
return;
IF_VERBOSE(2, verbose_stream() << "restart sls-arith\n");
++a.m_stats.m_restarts;
a.m_config.restart_next = std::max(a.m_config.restart_next, a.m_stats.m_steps);
a.m_config.restart_next += (2 * a.m_stats.m_restarts * a.m_config.restart_base)/3;
#endif
IF_VERBOSE(2, verbose_stream() << "restart sls-arith " << a.m_config.restart_next << "\n");
TRACE("arith", tout << "restart\n";);
// reset values of (arithmetical) variables at bounds.
for (auto& vi : a.m_vars) {