mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-08-10 05:00:51 +00:00
Code Activity

Minor updates

Browse source
This commit is contained in:
Anh-Dung Phan 2013-10-30 18:25:39 -07:00
parent 3a3f93c4a5
commit a3a7af84c5
1 changed files with 13 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

30
src/smt/network_flow_def.h
View file

@ -108,13 +108,8 @@ namespace smt {
node u = m_thread[root]; node u = m_thread[root];
while (u != root) { while (u != root) {
node v = m_pred[u]; node v = m_pred[u];
edge_id e_id = get_edge_id(u, v); edge_id e_id = get_edge_id(u, v);
if (m_upwards[u]) { m_potentials[u] = m_potentials[v] + (m_upwards[u] ? - m_graph.get_weight(e_id) : m_graph.get_weight(e_id));
m_potentials[u] = m_potentials[v] - m_graph.get_weight(e_id);
}
else {
m_potentials[u] = m_potentials[v] + m_graph.get_weight(e_id);
}
u = m_thread[u]; u = m_thread[u];
} }
@ -163,7 +158,6 @@ namespace smt {
for (unsigned u = target; u != m_join_node; u = m_pred[u]) { for (unsigned u = target; u != m_join_node; u = m_pred[u]) {
edge_id e_id = get_edge_id(u, m_pred[u]); edge_id e_id = get_edge_id(u, m_pred[u]);
m_flows[e_id] += m_upwards[u] ? val : -val; m_flows[e_id] += m_upwards[u] ? val : -val;
TRACE("network_flow", tout << u << ", " << m_pred[u] << ", " << e_id << ", " << m_upwards[u] << ", " << val;);
} }
TRACE("network_flow", tout << pp_vector("Flows", m_flows, true);); TRACE("network_flow", tout << pp_vector("Flows", m_flows, true););
} }
@ -175,10 +169,10 @@ namespace smt {
for (unsigned int i = 0; i < es.size(); ++i) { for (unsigned int i = 0; i < es.size(); ++i) {
edge const & e = es[i]; edge const & e = es[i];
edge_id e_id; edge_id e_id;
node source = e.get_source(); node source = e.get_source();
node target = e.get_target(); node target = e.get_target();
if (e.is_enabled() && m_graph.get_edge_id(source, target, e_id) && m_states[e_id] == NON_BASIS) { if (e.is_enabled() && m_graph.get_edge_id(source, target, e_id) && m_states[e_id] == NON_BASIS) {
numeral cost = e.get_weight() - m_potentials[source] + m_potentials[target]; numeral cost = e.get_weight() - m_potentials[source] + m_potentials[target];
// Choose the first negative-cost edge to be the violating edge // Choose the first negative-cost edge to be the violating edge
// TODO: add multiple pivoting strategies // TODO: add multiple pivoting strategies
if (cost.is_neg()) { if (cost.is_neg()) {
@ -285,8 +279,8 @@ namespace smt {
// Graft T_q and T_r' // Graft T_q and T_r'
m_thread[x] = q; m_thread[x] = q;
m_thread[z] = y; m_thread[z] = y;
n = u; n = q;
last = m_final[u]; last = m_final[q];
while (n != last) { while (n != last) {
m_depth[n] += 1 + m_depth[p]; m_depth[n] += 1 + m_depth[p];
n = m_pred[n]; n = m_pred[n];
@ -373,9 +367,11 @@ namespace smt {
prefix.append("_"); prefix.append("_");
unsigned root = m_graph.get_num_nodes() - 1; unsigned root = m_graph.get_num_nodes() - 1;
for (unsigned i = 0; i < root; ++i) { for (unsigned i = 0; i < root; ++i) {
oss << prefix << i << "[shape=circle,label=\"" << prefix << i << " [" << m_potentials[i] << "]\"];\n"; oss << prefix << i << "[shape=circle,label=\"" << prefix << i << " [";
oss << m_potentials[i] << "/" << m_balances[i] << "]\"];\n";
} }
oss << prefix << root << "[shape=doublecircle,label=\"" << prefix << root << " [" << m_potentials[root] << "]\"];\n"; oss << prefix << root << "[shape=doublecircle,label=\"" << prefix << root << " [";
oss << m_potentials[root] << "/" << m_balances[root] << "]\"];\n";
vector<edge> const & es = m_graph.get_all_edges(); vector<edge> const & es = m_graph.get_all_edges();
for (unsigned i = 0; i < es.size(); ++i) { for (unsigned i = 0; i < es.size(); ++i) {
@ -383,10 +379,10 @@ namespace smt {
if (e.is_enabled()) { if (e.is_enabled()) {
oss << prefix << e.get_source() << " -> " << prefix << e.get_target(); oss << prefix << e.get_source() << " -> " << prefix << e.get_target();
if (m_states[i] == BASIS) { if (m_states[i] == BASIS) {
oss << "[color=red,penwidth=3.0,label=\"" << m_flows[i] << "\"];\n"; oss << "[color=red,penwidth=3.0,label=\"" << m_flows[i] << "/" << e.get_weight() << "\"];\n";
} }
else { else {
oss << "[label=\"" << m_flows[i] << "\"];\n"; oss << "[label=\"" << m_flows[i] << "/" << e.get_weight() << "\"];\n";
} }
} }
} }