int constraints_per_variable = route.size();
constraints_per_variable += back_route.size();
if (action->latency_ > 0) {
action->set_variable(get_maxmin_system()->variable_new(action, 0.0, -1.0, constraints_per_variable));
int constraints_per_variable = route.size();
constraints_per_variable += back_route.size();
if (action->latency_ > 0) {
action->set_variable(get_maxmin_system()->variable_new(action, 0.0, -1.0, constraints_per_variable));