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cheap_eqs - work on fixed_phase

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-07-02 12:25:05 -07:00
parent 1695379dc9
commit f4502ff952
1 changed files with 40 additions and 7 deletions
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47
src/math/lp/lp_bound_propagator.h
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@ -187,7 +187,7 @@ public:
return val(v->column());
}
void try_add_equation_with_fixed_tables(vertex *v) {
void try_add_equation_with_lp_fixed_tables(const vertex *v) {
SASSERT(m_fixed_vertex);
unsigned v_j = v->column();
unsigned j;
@ -202,6 +202,28 @@ public:
add_eq_on_columns(ex, j, v->column());
}
void try_add_equation_with_val_table(const vertex *v) {
SASSERT(m_fixed_vertex);
unsigned v_j = v->column();
vertex *u;
if (!m_vals_to_verts.find(val(v_j), u)) {
m_vals_to_verts.insert(val(v_j), u);
return;
}
unsigned j = u->column();
if (j == v_j || is_int(j) != is_int(v_j))
return;
TRACE("cheap_eq", tout << "found j=" << j << " for v=";
print(tout, v) << "\n in m_vals_to_verts\n";);
ptr_vector<const vertex> path;
find_path_on_tree(path, u, v);
explanation ex = get_explanation_from_path(path);
ex.add_expl(m_fixed_vertex_explanation);
add_eq_on_columns(ex, j, v_j);
}
bool tree_contains_r(vertex* root, vertex *v) const {
if (*root == *v)
return true;
@ -533,6 +555,21 @@ public:
return out;
}
void try_add_equation_with_fixed_tables(const vertex* v) {
try_add_equation_with_lp_fixed_tables(v);
try_add_equation_with_val_table(v);
}
void create_fixed_eqs(const vertex* v) {
try_add_equation_with_fixed_tables(v);
for (vertex* c: v->children())
try_add_equation_with_fixed_tables(c);
}
void handle_fixed_phase() {
create_fixed_eqs(m_root);
}
void cheap_eq_tree(unsigned row_index) {
TRACE("cheap_eq", tout << "row_index = " << row_index << "\n";);
if (!check_insert(m_visited_rows, row_index))
@ -544,6 +581,8 @@ public:
TRACE("cheap_eq", tout << "tree = "; print_tree(tout, m_root) << "\n";);
SASSERT(tree_is_correct());
explore_under(m_root);
if (fixed_phase())
handle_fixed_phase();
TRACE("cheap_eq", tout << "done for row_index " << row_index << "\n";);
TRACE("cheap_eq", tout << "tree size = " << verts_size(););
delete_tree(m_root);
@ -555,12 +594,6 @@ public:
m_pol.reset();
}
void create_fixed_eqs(vertex* v) {
try_add_equation_with_fixed_tables(v);
for (vertex* c: v->children())
try_add_equation_with_fixed_tables(c);
}
std::ostream& print_row(std::ostream & out, unsigned row_index) const {
unsigned x, y; int polarity;
if (true || !is_tree_offset_row(row_index, x, y, polarity))