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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-08-13 14:05:07 -07:00
parent 9804ba9fd2
commit 6366f8f6b2
6 changed files with 17 additions and 28 deletions
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15
src/math/lp/lar_solver.cpp
View file

@ -258,7 +258,7 @@ namespace lp {
m_crossed_bounds_column.pop(k);
unsigned n = m_columns_to_ul_pairs.peek_size(k);
m_var_register.shrink(n);
pop_tableau();
pop_tableau(n);
lp_assert(A_r().column_count() == n);
TRACE("lar_solver_details",
for (unsigned j = 0; j < n; j++) {
@ -1326,15 +1326,15 @@ namespace lp {
lp_assert(A_r().column_count() == m_mpq_lar_core_solver.m_r_solver.m_costs.size());
}
void lar_solver::pop_tableau() {
void lar_solver::pop_tableau(unsigned old_size) {
lp_assert(m_mpq_lar_core_solver.m_r_solver.m_costs.size() == A_r().column_count());
lp_assert(m_mpq_lar_core_solver.m_r_solver.m_basis.size() == A_r().row_count());
lp_assert(m_mpq_lar_core_solver.m_r_solver.basis_heading_is_correct());
// We remove last variables starting from m_column_names.size() to m_vec_of_canonic_left_sides.size().
// At this moment m_column_names is already popped
unsigned size = m_var_register.size();
while (A_r().column_count() > size)
while (A_r().column_count() > old_size)
remove_last_column_from_tableau();
lp_assert(m_mpq_lar_core_solver.m_r_solver.m_costs.size() == A_r().column_count());
lp_assert(m_mpq_lar_core_solver.m_r_solver.m_basis.size() == A_r().row_count());
@ -1544,12 +1544,7 @@ namespace lp {
// terms
bool lar_solver::all_vars_are_registered(const vector<std::pair<mpq, var_index>>& coeffs) {
for (const auto& p : coeffs) {
if (p.second >= m_var_register.size()) {
return false;
}
}
return true;
return all_of(coeffs, [&](const auto& p) { return p.second < m_var_register.size(); });
}
void lar_solver::subst_known_terms(lar_term* t) {

2
src/math/lp/lar_solver.h
View file

@ -225,7 +225,7 @@ class lar_solver : public column_namer {
void remove_last_column_from_basis_tableau(unsigned j);
void remove_last_column_from_tableau();
void pop_tableau();
void pop_tableau(unsigned old_size);
void clean_inf_heap_of_r_solver_after_pop();
inline bool column_value_is_integer(unsigned j) const { return get_column_value(j).is_int(); }
bool model_is_int_feasible() const;

12
src/math/lp/var_register.h
View file

@ -72,9 +72,8 @@ public:
svector<unsigned> vars() const {
svector<unsigned> ret;
for (const auto& p : m_local_to_external) {
for (const auto& p : m_local_to_external)
ret.push_back(p.external_j());
}
return ret;
}
@ -126,11 +125,7 @@ public:
}
bool has_int_var() const {
for (const auto & vi : m_local_to_external) {
if (vi.is_integer())
return true;
}
return false;
return any_of(m_local_to_external, [&](const auto& vi) { return vi.is_integer(); });
}
bool local_is_int(unsigned j) const {
@ -138,9 +133,8 @@ public:
}
void shrink(unsigned shrunk_size) {
for (unsigned j = size(); j-- > shrunk_size;) {
for (unsigned j = size(); j-- > shrunk_size;)
m_external_to_local.erase(m_local_to_external[j].external_j());
}
m_local_to_external.resize(shrunk_size);
}