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* avoid creating rows with  all but one fixed columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* pb

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* once in a while flip bounds of boxed variables during move_nbasic_to_bounds

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* flip rarely

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* flip rarely

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* flip rarely

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* return an empty model when lar_solver is not ready

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* randomly change bounded base var on demand only

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

* randomly change bounded base var on demand only

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-09-25 17:47:29 -07:00 • committed by GitHub
parent e775964cfd
commit 25724401cf
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10 changed files with 72 additions and 70 deletions
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src/math/lp/nla_core.cpp
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@ -1467,7 +1467,7 @@ lbool core::check(vector<lemma>& l_vec) {
init_to_refine();
patch_monomials();
set_use_nra_model(false);
if (m_to_refine.is_empty()) { return l_true; }
if (m_to_refine.empty()) { return l_true; }
init_search();
lbool ret = l_undef;