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runs a simple test

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This commit is contained in:
Lev Nachmanson 2023-09-13 08:12:00 -07:00
parent c050af922f
commit c309d52283
11 changed files with 291 additions and 112 deletions
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31
src/math/lp/bound_analyzer_on_row.h
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@ -26,6 +26,8 @@ Revision History:
#include "math/lp/test_bound_analyzer.h"
namespace lp {
template <typename C, typename B> // C plays a role of a container, B - lp_bound_propagator
class bound_analyzer_on_row {
const C& m_row;
@ -301,8 +303,12 @@ private:
// */
// }
void limit_j(unsigned j, const mpq& u, bool coeff_before_j_is_pos, bool is_lower_bound, bool strict){
m_bp.try_add_bound(u, j, is_lower_bound, coeff_before_j_is_pos, m_row_index, strict);
void limit_j(unsigned bound_j, const mpq& u, bool coeff_before_j_is_pos, bool is_lower_bound, bool strict){
lar_solver* lar = & this->m_bp.lp();
unsigned row_index = this->m_row_index;
auto explain = [lar, bound_j, coeff_before_j_is_pos, is_lower_bound, strict, row_index]() { return explain_bound_on_var_on_coeff(lar, bound_j, coeff_before_j_is_pos, is_lower_bound, strict, row_index); };
m_bp.add_bound(u, bound_j, is_lower_bound, strict, explain );
}
void advance_u(unsigned j) {
@ -335,6 +341,27 @@ private:
break;
}
}
static u_dependency* explain_bound_on_var_on_coeff(lar_solver* lar, unsigned bound_j, bool coeff_before_j_is_pos, bool is_lower_bound, bool strict, unsigned row_index) {
int bound_sign = (is_lower_bound ? 1 : -1);
int j_sign = (coeff_before_j_is_pos ? 1 : -1) * bound_sign;
if (tv::is_term(bound_j))
bound_j = lar->map_term_index_to_column_index(bound_j);
u_dependency* ret = nullptr;
for (auto const& r : lar->get_row(row_index)) {
unsigned j = r.var();
if (j == bound_j)
continue;
mpq const& a = r.coeff();
int a_sign = is_pos(a) ? 1 : -1;
int sign = j_sign * a_sign;
u_dependency* witness = sign > 0 ? lar->get_column_upper_bound_witness(j) : lar->get_column_lower_bound_witness(j);
ret = lar->join_deps(ret, witness);
}
return ret;
}
};
}