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accept terms indices in core::explain_coeff_upper_bound()

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-03-15 19:47:31 -07:00
parent 4683c3f241
commit 687c487746
1 changed files with 5 additions and 4 deletions
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9
src/math/lp/nla_core.cpp
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@ -342,21 +342,22 @@ bool core:: explain_coeff_lower_bound(const lp::lar_term::ival& p, rational& bou
bool core:: explain_coeff_upper_bound(const lp::lar_term::ival& p, rational& bound, lp::explanation& e) const {
const rational& a = p.coeff();
lpvar j = lp::is_term(p.var())? m_lar_solver.map_term_index_to_column_index(p.var()) : p.var();
SASSERT(!a.is_zero());
unsigned c; // the index for the lower or the upper bound
if (a.is_neg()) {
unsigned c = m_lar_solver.get_column_lower_bound_witness(p.var());
unsigned c = m_lar_solver.get_column_lower_bound_witness(j);
if (c + 1 == 0)
return false;
bound = a * m_lar_solver.get_lower_bound(p.var()).x;
bound = a * m_lar_solver.get_lower_bound(j).x;
e.add(c);
return true;
}
// a.is_pos()
c = m_lar_solver.get_column_upper_bound_witness(p.var());
c = m_lar_solver.get_column_upper_bound_witness(j);
if (c + 1 == 0)
return false;
bound = a * m_lar_solver.get_upper_bound(p.var()).x;
bound = a * m_lar_solver.get_upper_bound(j).x;
e.add(c);
return true;
}