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use heap to track infeasible columns. (#6771)

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* use heap to track infeasible columns

* fix the formatting

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

---------

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2023-06-19 13:50:14 -07:00 • committed by GitHub
parent 4d44e60c33
commit 32ec02778e
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12 changed files with 116 additions and 102 deletions
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src/math/lp/nla_tangent_lemmas.cpp
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@ -75,8 +75,8 @@ private:
c().negate_relation(lemma, m_jy, m_y.rat_sign()*pl.y);
#if Z3DEBUG
SASSERT(c().val(m_x) == m_xy.x && c().val(m_y) == m_xy.y);
int mult_sign = nla::rat_sign(pl.x - m_xy.x)*nla::rat_sign(pl.y - m_xy.y);
SASSERT((mult_sign == 1) == m_below);
// int mult_sign = nla::rat_sign(pl.x - m_xy.x)*nla::rat_sign(pl.y - m_xy.y);
SASSERT((nla::rat_sign(pl.x - m_xy.x)*nla::rat_sign(pl.y - m_xy.y) == 1) == m_below);
// If "mult_sign is 1" then (a - x)(b-y) > 0 and ab - bx - ay + xy > 0
// or -ab + bx + ay < xy or -ay - bx + xy > -ab
// val(j) stands for xy. So, finally we have -ay - bx + j > - ab