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add option to propagation quotients

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for equations x*y + z = 0,
with x, y, z integer, enforce that x divides z
It is (currently) enabled within Grobner completion
and applied partially to x a variable, z linear, and
only when |z| < |x|.
This commit is contained in:
Nikolaj Bjorner 2025-08-31 14:41:23 -07:00
parent 91b4873b79
commit e91e432496
10 changed files with 516 additions and 258 deletions
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1
src/params/smt_params_helper.pyg
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@ -78,6 +78,7 @@ def_module_params(module_name='smt',
('arith.nl.grobner_expr_degree_growth', UINT, 2, 'grobner\'s maximum expr degree growth'),
('arith.nl.grobner_max_simplified', UINT, 10000, 'grobner\'s maximum number of simplifications'),
('arith.nl.grobner_cnfl_to_report', UINT, 1, 'grobner\'s maximum number of conflicts to report'),
('arith.nl.grobner_propagate_quotients', BOOL, False, 'detect conflicts x*y + z = 0 where x doesn\'t divide z'),
('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.delay', UINT, 10, 'number of calls to final check before invoking bounded nlsat check'),