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fix a bug in column patching

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-03-29 13:51:39 -07:00
parent 7a950dd667
commit 9be7bda69a
2 changed files with 3 additions and 3 deletions
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4
src/math/lp/lar_solver.cpp
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@ -2399,7 +2399,7 @@ bool lar_solver::try_to_patch(lpvar j, const mpq& val, std::function<bool (lpvar
if (!inside_bounds(j, ival)) if (!inside_bounds(j, ival))
return false; return false;
impq delta = ival - get_column_value(j); impq delta = get_column_value(j) - ival;
for (const auto &c : A_r().column(j)) { for (const auto &c : A_r().column(j)) {
unsigned row_index = c.var(); unsigned row_index = c.var();
const mpq & a = c.coeff(); const mpq & a = c.coeff();
@ -2416,7 +2416,7 @@ bool lar_solver::try_to_patch(lpvar j, const mpq& val, std::function<bool (lpvar
unsigned row_index = c.var(); unsigned row_index = c.var();
const mpq & a = c.coeff(); const mpq & a = c.coeff();
unsigned rj = m_mpq_lar_core_solver.m_r_basis[row_index]; unsigned rj = m_mpq_lar_core_solver.m_r_basis[row_index];
set_column_value(rj,a * delta + get_column_value(rj)); m_mpq_lar_core_solver.m_r_solver.add_delta_to_x(rj, a * delta);
report_change(rj); report_change(rj);
} }
return true; return true;