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cheap_eqs

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-06-16 11:50:02 -07:00
parent 431bb36cf5
commit 80467f1400
1 changed files with 10 additions and 8 deletions
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16
src/math/lp/lp_bound_propagator.h
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@ -227,12 +227,14 @@ public:
} }
void create_root(unsigned row_index) { void create_root(unsigned row_index) {
signed_index x, y;
mpq offset;
if (!is_offset_row_tree(row_index, x, y, offset))
return;
TRACE("cheap_eq", display_row_info(row_index, tout););
NOT_IMPLEMENTED_YET(); NOT_IMPLEMENTED_YET();
} }
// returns the vertex to start exploration from // returns the vertex to start exploration from
vertex* add_child_from_row(unsigned row_index, vertex* parent) { vertex* add_child_from_row(unsigned row_index, vertex* parent) {
NOT_IMPLEMENTED_YET(); NOT_IMPLEMENTED_YET();
@ -292,6 +294,7 @@ public:
m_visited_rows.reset(); m_visited_rows.reset();
m_visited_columns.reset(); m_visited_columns.reset();
m_offset_to_verts.reset(); m_offset_to_verts.reset();
m_root = nullptr;
} }
// we have v_i and v_j, indices of vertices at the same offsets // we have v_i and v_j, indices of vertices at the same offsets
@ -533,9 +536,8 @@ public:
void cheap_eq_tree(unsigned row_index) { void cheap_eq_tree(unsigned row_index) {
TRACE("cheap_eq", tout << "row_index = " << row_index << "\n";); TRACE("cheap_eq", tout << "row_index = " << row_index << "\n";);
if (m_visited_rows.contains(row_index)) if (!check_insert(m_visited_rows, row_index))
return; // already explored return; // already explored
m_visited_rows.insert(row_index); // this row does not produce eqs
create_root(row_index); create_root(row_index);
if (m_root == nullptr) { if (m_root == nullptr) {
return; return;
@ -634,8 +636,8 @@ public:
} else if (y.m_index == UINT_MAX) { } else if (y.m_index == UINT_MAX) {
if (!set_sign_and_index(c.coeff(), y, k)) if (!set_sign_and_index(c.coeff(), y, k))
return false; return false;
} } else
return false; return false;
} }
if (x.not_set() && y.not_set()) if (x.not_set() && y.not_set())