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try exponential delay in grobner

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2025-10-22 17:00:16 -07:00 • committed by Nikolaj Bjorner
parent ba03d35957
commit a15b21bc62
2 changed files with 16 additions and 3 deletions
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17
src/math/lp/nla_grobner.cpp
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@ -47,9 +47,22 @@ namespace nla {
if (m_quota == 0)
m_quota = c().params().arith_nl_gr_q();
bool const use_exp_delay = c().params().arith_nl_grobner_exp_delay();
if (m_quota == 1) {
m_delay_base++;
m_delay = m_delay_base;
if (use_exp_delay) {
constexpr unsigned delay_cap = 1000000;
if (m_delay_base == 0)
m_delay_base = 1;
else if (m_delay_base < delay_cap) {
m_delay_base *= 2;
if (m_delay_base > delay_cap)
m_delay_base = delay_cap;
}
m_delay = m_delay_base;
}
else
m_delay = ++m_delay_base;
m_quota = c().params().arith_nl_gr_q();
}

2
src/params/smt_params_helper.pyg
View file

@ -80,6 +80,7 @@ def_module_params(module_name='smt',
('arith.nl.grobner_cnfl_to_report', UINT, 1, 'grobner\'s maximum number of conflicts to report'),
('arith.nl.grobner_propagate_quotients', BOOL, True, 'detect conflicts x*y + z = 0 where x doesn\'t divide z'),
('arith.nl.grobner_gcd_test', BOOL, True, 'detect gcd conflicts for polynomial powers x^k - y = 0'),
('arith.nl.grobner_exp_delay', BOOL, False, 'use exponential delay between grobner basis attempts'),
('arith.nl.gr_q', UINT, 10, 'grobner\'s quota'),
('arith.nl.grobner_subs_fixed', UINT, 1, '0 - no subs, 1 - substitute, 2 - substitute fixed zeros only'),
('arith.nl.grobner_expand_terms', BOOL, True, 'expand terms before computing grobner basis'),
@ -138,4 +139,3 @@ def_module_params(module_name='smt',
('dt_lazy_splits', UINT, 1, 'How lazy datatype splits are performed: 0- eager, 1- lazy for infinite types, 2- lazy'),
('qsat_use_qel', BOOL, True, 'Use QEL for lite quantifier elimination and model-based projection in QSAT')
))