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avoid big nums in is_offset_row in cheap_eqs

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-06-09 18:36:19 -07:00
parent 713eb6319d
commit 50b9915c57
2 changed files with 8 additions and 3 deletions
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1
src/math/lp/lar_solver.cpp
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@ -144,7 +144,6 @@ bool lar_solver::row_has_a_big_num(unsigned i) const {
return false;
}
void lar_solver::substitute_basis_var_in_terms_for_row(unsigned i) {
// todo : create a map from term basic vars to the rows where they are used
unsigned basis_j = m_mpq_lar_core_solver.m_r_solver.m_basis[i];

10
src/math/lp/lp_bound_propagator.h
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@ -151,8 +151,12 @@ public:
x = y = null_lpvar;
for (auto& c : lp().get_row(r)) {
lpvar v = c.var();
if (column_is_fixed(v))
if (column_is_fixed(v)) {
// if (get_lower_bound_rational(c.var()).is_big())
// return false;
continue;
}
if (c.coeff().is_one() && x == null_lpvar) {
x = v;
continue;
@ -173,6 +177,8 @@ public:
if (!column_is_fixed(c.var()))
continue;
k -= c.coeff() * get_lower_bound_rational(c.var());
if (k.is_big())
return false;
}
if (y == null_lpvar)
@ -184,7 +190,7 @@ public:
return true;
}
if (/*r.get_base_var() != x &&*/ x > y) {
if (!lp().is_base(x) && x > y) {
std::swap(x, y);
k.neg();
}