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use a large delay for nlsat

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This commit is contained in:
Nikolaj Bjorner 2021-03-14 19:14:44 -07:00
parent 155738088f
commit 845ba7a11e
2 changed files with 10 additions and 6 deletions
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14
src/math/lp/nla_core.cpp
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@ -1518,7 +1518,7 @@ lbool core::check(vector<lemma>& l_vec) {
ret = bounded_nlsat();
if (l_vec.empty() && !done()) {
if (l_vec.empty() && !done() && ret == l_undef) {
std::function<void(void)> check1 = [&]() { m_order.order_lemma(); };
std::function<void(void)> check2 = [&]() { m_monotone.monotonicity_lemma(); };
std::function<void(void)> check3 = [&]() { m_tangents.tangent_lemma(); };
@ -1529,10 +1529,9 @@ lbool core::check(vector<lemma>& l_vec) {
{ 1, check3 }};
check_weighted(3, checks);
if (!conflict_found() && m_nla_settings.run_nra() && should_run_bounded_nlsat() &&
lp_settings().stats().m_nla_calls > 500) {
unsigned num_calls = lp_settings().stats().m_nla_calls;
if (!conflict_found() && m_nla_settings.run_nra() && num_calls % 50 == 0 && num_calls > 500)
ret = bounded_nlsat();
}
}
if (l_vec.empty() && !done() && m_nla_settings.run_nra() && ret == l_undef) {
@ -1555,6 +1554,8 @@ lbool core::check(vector<lemma>& l_vec) {
}
bool core::should_run_bounded_nlsat() {
if (!m_nla_settings.run_nra())
return false;
if (m_nlsat_delay > m_nlsat_fails)
++m_nlsat_fails;
return m_nlsat_delay <= m_nlsat_fails;
@ -1570,11 +1571,14 @@ lbool core::bounded_nlsat() {
m_nra.updt_params(p);
m_stats.m_nra_calls++;
if (ret == l_undef)
++m_nlsat_delay;
++m_nlsat_delay;
else {
m_nlsat_fails = 0;
m_nlsat_delay /= 2;
}
if (ret == l_true) {
m_lemma_vec->reset();
}
return ret;
}

2
src/smt/params/smt_params_helper.pyg
View file

@ -71,7 +71,7 @@ def_module_params(module_name='smt',
('arith.nl.grobner_cnfl_to_report', UINT, 1, 'grobner\'s maximum number of conflicts to report'),
('arith.nl.gr_q', UINT, 10, 'grobner\'s quota'),
('arith.nl.grobner_subs_fixed', UINT, 2, '0 - no subs, 1 - substitute, 2 - substitute fixed zeros only'),
('arith.nl.delay', UINT, 100, 'number of calls to final check before invoking bounded nlsat check'),
('arith.nl.delay', UINT, 500, 'number of calls to final check before invoking bounded nlsat check'),
('arith.propagate_eqs', BOOL, True, 'propagate (cheap) equalities'),
('arith.propagation_mode', UINT, 1, '0 - no propagation, 1 - propagate existing literals, 2 - refine finite bounds'),
('arith.reflect', BOOL, True, 'reflect arithmetical operators to the congruence closure'),