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introduce int_solver.h

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2017-05-15 15:32:31 -07:00
parent d2ac59f238
commit 4eec8cbadd
2 changed files with 3 additions and 82 deletions
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1
contrib/cmake/src/util/lp/CMakeLists.txt
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@ -8,6 +8,7 @@ z3_add_component(lp
dense_matrix_instances.cpp
eta_matrix_instances.cpp
indexed_vector_instances.cpp
lar_solver.cpp
lar_core_solver_instances.cpp
lp_core_solver_base_instances.cpp
lp_dual_core_solver_instances.cpp

84
src/util/lp/lar_solver.h
View file

@ -30,6 +30,8 @@
#include "util/lp/iterator_on_row.h"
#include "util/lp/quick_xplain.h"
#include "util/lp/conversion_helper.h"
#include "util/lp/int_solver.h"
namespace lean {
class lar_solver : public column_namer {
@ -256,88 +258,6 @@ public:
}
}
/*
void process_new_implied_evidence_for_low_bound(
implied_bound_explanation& implied_evidence, // not pushed yet
vector<bound_evidence> & bound_evidences,
std::unordered_map<unsigned, unsigned> & improved_low_bounds) {
unsigned existing_index;
if (try_get_val(improved_low_bounds, implied_evidence.m_j, existing_index)) {
// we are improving the existent bound
bound_evidences[existing_index] = fill_bound_evidence(implied_evidence);
} else {
improved_low_bounds[implied_evidence.m_j] = bound_evidences.size();
bound_evidences.push_back(fill_bound_evidence(implied_evidence));
}
}
void fill_bound_evidence_on_term(implied_bound & ie, implied_bound& be) {
lean_assert(false);
}
void fill_implied_bound_on_row(implied_bound & ie, implied_bound& be) {
iterator_on_row<mpq> it(A_r().m_rows[ie.m_row_or_term_index]);
mpq a; unsigned j;
bool toggle = ie.m_coeff_before_j_is_pos;
if (!ie.m_is_low_bound)
toggle = !toggle;
while (it.next(a, j)) {
if (j == ie.m_j) continue;
const ul_pair & ul = m_vars_to_ul_pairs[j];
if (is_neg(a)) { // so the monoid has a positive coeff on the right side
constraint_index witness = toggle ? ul.m_low_bound_witness : ul.m_upper_bound_witness;
lean_assert(is_valid(witness));
be.m_explanation.emplace_back(a, witness);
}
}
}
*/
/*
implied_bound fill_implied_bound_for_low_bound(implied_bound& ie) {
implied_bound be(ie.m_j, ie.m_bound.y.is_zero() ? GE : GT, ie.m_bound.x);
if (is_term(ie.m_row_or_term_index)) {
fill_implied_bound_for_low_bound_on_term(ie, be);
}
else {
fill_implied_bound_for_low_bound_on_row(ie, be);
}
return be;
}
implied_bound fill_implied_bound_for_upper_bound(implied_bound& implied_evidence) {
lean_assert(false);
be.m_j = implied_evidence.m_j;
be.m_bound = implied_evidence.m_bound.x;
be.m_kind = implied_evidence.m_bound.y.is_zero() ? LE : LT;
for (auto t : implied_evidence.m_vector_of_bound_signatures) {
const ul_pair & ul = m_vars_to_ul_pairs[t.m_column_index];
constraint_index witness = t.m_low_bound ? ul.m_low_bound_witness : ul.m_upper_bound_witness;
lean_assert(is_valid(witness));
be.m_explanation.emplace_back(t.m_coeff, witness);
}
}
*/
/*
void process_new_implied_evidence_for_upper_bound(
implied_bound& implied_evidence,
vector<implied_bound> & implied_bounds,
std::unordered_map<unsigned, unsigned> & improved_upper_bounds) {
unsigned existing_index;
if (try_get_val(improved_upper_bounds, implied_evidence.m_j, existing_index)) {
implied_bound & be = implied_bounds[existing_index];
be.m_explanation.clear();
// we are improving the existent bound improve the existing bound
be = fill_implied_bound_for_upper_bound(implied_evidence);
} else {
improved_upper_bounds[implied_evidence.m_j] = implied_bounds.size();
implied_bounds.push_back(fill_implied_bound_for_upper_bound(implied_evidence));
}
}
*/
// implied_bound * get_existing_
linear_combination_iterator<mpq> * create_new_iter_from_term(unsigned term_index) const {
lean_assert(false); // not implemented