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working on #5614

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there are some different sources for the performance regression illustrated by the example. The mitigations will be enabled separately:
- m_bv_to_propagate is too expensive
- lp_bound_propagator misses equalities in two different ways:
   - it resets row checks after backtracking even though they could still propagate
   - it misses equalities for fixed rows when the fixed constant value does not correspond to a fixed variable.

FYI @levnach
This commit is contained in:
Nikolaj Bjorner 2021-11-02 14:55:28 -07:00
parent a94e2e62af
commit 87d4ce2659
13 changed files with 422 additions and 385 deletions
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2
src/math/lp/lp_settings.cpp
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@ -27,7 +27,7 @@ template bool lp::vectors_are_equal<lp::mpq>(vector<lp::mpq > const&, vector<lp:
void lp::lp_settings::updt_params(params_ref const& _p) {
smt_params_helper p(_p);
m_enable_hnf = p.arith_enable_hnf();
m_cheap_eqs = p.arith_propagate_eqs();
m_propagate_eqs = p.arith_propagate_eqs();
print_statistics = p.arith_print_stats();
m_print_external_var_name = p.arith_print_ext_var_names();
report_frequency = p.arith_rep_freq();