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tsp_localsolver.cc
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tsp_localsolver.cc
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#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstddef>
#include <fstream>
#include <iomanip>
#include <lsarray.h>
#include <lscallbacktype.h>
#include <lscollection.h>
#include <lsexpression.h>
#include <lssolution.h>
#include <ostream>
#include <stdexcept>
#include <string>
#include <typeinfo>
#include <vector>
// https://stackoverflow.com/a/77336
#include <execinfo.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "./localsolver_result.pb.h"
#include "./localsolver_vrp.pb.h"
// #include "callback_ls.cpp"
#include "localsolver.h"
#include "ortools/base/commandlineflags.h"
#define CUSTOM_MAX_INT (int64) std::pow(2, 30)
#define CUSTOM_BIGNUM_COST 1e6
DEFINE_string(solution_file, "", "solution file name ");
DEFINE_string(instance_file, "", "instance file name or data");
using namespace localsolver;
using namespace google::protobuf;
using namespace std;
DEFINE_int64(time_limit_in_ms, 1000, "Time limit in ms, no option means no limit.");
DEFINE_int64(no_solution_improvement_limit, -1, "Iterations whitout improvement");
DEFINE_int64(minimum_duration, -1, "Initial time whitout improvement in ms");
DEFINE_int64(init_duration, -1, "Maximum duration to find a first solution");
DEFINE_int64(time_out_multiplier, 2, "Multiplier for the next time out");
DEFINE_int64(vehicle_limit, 0, "Define the maximum number of vehicle");
DEFINE_int64(solver_parameter, -1, "Force a particular behavior");
DEFINE_bool(only_first_solution, false, "Compute only the first solution");
DEFINE_bool(verification_only, false, "Only verify the suplied initial solution");
DEFINE_bool(balance, false, "Route balancing");
DEFINE_bool(nearby, false, "Short segment priority");
#ifdef DEBUG
DEFINE_bool(debug, true, "debug display");
#else
DEFINE_bool(debug, false, "debug display");
#endif
DEFINE_bool(intermediate_solutions, false, "display intermediate solutions");
DEFINE_string(routing_search_parameters,
"", /* An example of how we can override the default settings */
// "first_solution_strategy:ALL_UNPERFORMED"
// "local_search_operators {"
// " use_path_lns:BOOL_TRUE"
// " use_inactive_lns:BOOL_TRUE"
// "}",
"Text proto RoutingSearchParameters (possibly partial) that will "
"override the DefaultRoutingSearchParameters()");
void handler(int sig) {
void* array[10];
size_t size;
// get void*'s for all entries on the stack
size = backtrace(array, 10);
// print out all the frames to stderr
fprintf(stderr, "Error: signal %d:\n", sig);
backtrace_symbols_fd(array, size, STDERR_FILENO);
exit(1);
}
bool equals(double a, double b) {
float EPSILON = 10e-6;
return fabs(a - b) < EPSILON;
}
class MyCallback : public LSCallback {
private:
int lastBestRunningTime;
lsdouble lastBestValue;
const int64 minimum_duration_in_s;
const int64 time_out_multiplier;
public:
MyCallback(const int64 minimum_duration, const int64 time_out_multip)
: minimum_duration_in_s(minimum_duration / 1000)
, time_out_multiplier(time_out_multip) {
lastBestRunningTime = 0;
lastBestValue = CUSTOM_MAX_INT;
}
void callback(LocalSolver& ls, LSCallbackType type) {
(void)type;
LSStatistics stats = ls.getStatistics();
LSExpression obj = ls.getModel().getObjective(0);
if (obj.getDoubleValue() < lastBestValue) {
lastBestRunningTime = stats.getRunningTime();
lastBestValue = obj.getDoubleValue();
}
cout << "getRunningTime " << stats.getRunningTime() << " " << lastBestRunningTime
<< " " << lastBestValue << endl;
if (stats.getRunningTime() > minimum_duration_in_s &&
stats.getRunningTime() > time_out_multiplier * lastBestRunningTime) {
cout << ">>>>>>> Resolution stopped" << endl;
ls.stop();
}
}
};
class localsolver_VRP {
public:
const localsolver_vrp::Problem problem;
LocalSolver localsolver;
LSModel model;
vector<LSExpression> timeMatrices; // the matrices are reordered by service.matrix_index
vector<LSExpression>
distanceMatrices; // the matrices are reordered by service.matrix_index
LSExpression serviceTime;
LSExpression serviceLateMultiplier;
LSExpression serviceSetUpDuration;
LSExpression serviceQuantitiesMatrix;
LSExpression serviceExclusionCost;
LSExpression servicePriority;
LSExpression serviceMatrixIndex;
int maxTwStarts;
LSExpression vehicleStartIndicies;
LSExpression vehicleEndIndicies;
LSExpression vehicleCapacitiesMatrix;
LSExpression endOfVehicleTimeWindow;
map<string, int64> service_ids_map_;
vector<map<int, LSExpression>> timesFromWarehouses;
vector<map<int, LSExpression>> timesToWarehouses;
vector<map<int, LSExpression>> distanceFromWarehouses;
vector<map<int, LSExpression>> distanceToWarehouses;
LSExpression serviceTwStartsArray;
LSExpression serviceTwEndsArray;
LSExpression twAbsoluteEndsArray;
LSExpression nbTwsArray;
LSExpression waitNextTWArray;
vector<LSExpression> startTimeVehicle;
vector<LSExpression> endTimeVehicle;
vector<LSExpression> routeDuration;
vector<LSExpression> routeDurationCost;
vector<LSExpression> routeDistance;
vector<LSExpression> routeDistanceCost;
vector<LSExpression> routeFixedCost;
vector<LSExpression> endTime;
vector<LSExpression> endTimeWithRest;
vector<LSExpression> beginTime;
vector<LSExpression> arrivalTime;
vector<LSExpression> waitingTime;
vector<LSExpression> serviceStartsInTW;
vector<LSExpression> latenessOfVehicle;
vector<LSExpression> latenessCost;
vector<LSExpression> latenessOfServicesOfVehicle;
vector<LSExpression> excessLateness;
vector<LSExpression> Rest;
vector<LSExpression> restDuration;
vector<int> allVehicleIndices;
map<string, int64> vehicle_ids_map_;
vector<map<string, int64>> rest_ids_map;
// Time Leaving The Warehouse
vector<LSExpression> timeLeavingTheWarehouse;
LSExpression twEndSelect(const LSExpression& service, const LSExpression& time) {
LSExpression timeWindowSelector =
model.createLambdaFunction([&](LSExpression tw_index) {
return model.iif(
model.at(twAbsoluteEndsArray, service, tw_index) >= time &&
model.at(serviceTwStartsArray, service, tw_index) <= time &&
waitNextTWArray[service] == 0,
model.at(serviceTwEndsArray, service, tw_index),
model.at(serviceTwEndsArray, service, nbTwsArray[service] - 1));
});
return model.min(model.range(0, nbTwsArray[service]), timeWindowSelector);
}
LSExpression nextStart(const LSExpression& service, const LSExpression& time) {
LSExpression timeWindowSelector =
model.createLambdaFunction([&](LSExpression tw_index) {
LSExpression twDecisionAbsoluteEnd =
model.iif(waitNextTWArray[service] == 1,
model.at(serviceTwEndsArray, service, tw_index),
model.at(twAbsoluteEndsArray, service, tw_index));
return model.iif(
twDecisionAbsoluteEnd >= time,
model.at(serviceTwStartsArray, service, tw_index),
model.at(twAbsoluteEndsArray, service, nbTwsArray[service] - 1));
});
LSExpression earliestAvailableTime =
model.iif(nbTwsArray[service] == 0, 0,
model.min(model.range(0, nbTwsArray[service]), timeWindowSelector));
return model.max(time, earliestAvailableTime);
}
void firstAndSecondSolving(vector<LSExpression> timeLeavingTheWarehouseConstraint) {
cout << model.toString() << endl;
std::unique_ptr<MyCallback> cbp;
if (!FLAGS_only_first_solution) {
cbp =
std::make_unique<MyCallback>(FLAGS_minimum_duration, FLAGS_time_out_multiplier);
localsolver.addCallback(localsolver::CT_TimeTicked, cbp.get());
localsolver.getParam().setTimeLimit((FLAGS_time_limit_in_ms / 1000) / 2);
auto iis = localsolver.computeInconsistency();
cout << iis.toString() << endl;
localsolver.solve();
} else {
// localsolver.getParam().setIterationLimit(1);
auto iis = localsolver.computeInconsistency();
cout << iis.toString() << endl;
cbp = std::make_unique<MyCallback>(3000, FLAGS_time_out_multiplier);
localsolver.addCallback(localsolver::CT_TimeTicked, cbp.get());
}
model.open();
for (auto constraint : timeLeavingTheWarehouseConstraint) {
model.removeConstraint(constraint);
}
model.close();
localsolver.getParam().setTimeLimit((FLAGS_time_limit_in_ms / 1000) / 2);
localsolver.solve();
}
void RelationBuilder(LSExpression& sequenceVehicle, LSExpression& unassignedServices) {
for (const auto& relation : problem.relations()) {
if (relation.type() == "shipment") {
for (int link_index = 0; link_index < relation.linked_ids_size() - 1;
link_index++) {
model.constraint(
model.contains(sequenceVehicle,
static_cast<lsint>(IdIndex(relation.linked_ids(link_index),
service_ids_map_))) ==
model.contains(sequenceVehicle, static_cast<lsint>(IdIndex(
relation.linked_ids(link_index + 1),
service_ids_map_))));
model.constraint(
model.indexOf(sequenceVehicle,
static_cast<lsint>(IdIndex(relation.linked_ids(link_index),
service_ids_map_))) <=
model.indexOf(sequenceVehicle,
static_cast<lsint>(IdIndex(
relation.linked_ids(link_index + 1), service_ids_map_))));
}
}
if (relation.type() == "order") {
for (int link_index = 0; link_index < relation.linked_ids_size() - 1;
link_index++) {
LSExpression sequenceContainsCurrentService = model.contains(
sequenceVehicle, static_cast<lsint>(IdIndex(relation.linked_ids(link_index),
service_ids_map_)));
LSExpression sequenceContainsNextService =
model.contains(sequenceVehicle,
static_cast<lsint>(IdIndex(
relation.linked_ids(link_index + 1), service_ids_map_)));
LSExpression nextIsNotAssigned =
model.contains(unassignedServices,
static_cast<lsint>(IdIndex(
relation.linked_ids(link_index + 1), service_ids_map_)));
model.constraint(model.iif(sequenceContainsCurrentService,
sequenceContainsNextService || nextIsNotAssigned,
!sequenceContainsNextService));
model.constraint(model.iif(
sequenceContainsNextService,
model.indexOf(sequenceVehicle,
static_cast<lsint>(IdIndex(relation.linked_ids(link_index),
service_ids_map_))) <=
model.indexOf(sequenceVehicle, static_cast<lsint>(IdIndex(
relation.linked_ids(link_index + 1),
service_ids_map_))),
true));
}
}
if (relation.type() == "sequence") {
for (int link_index = 0; link_index < relation.linked_ids_size() - 1;
link_index++) {
LSExpression sequenceContainsCurrentService = model.contains(
sequenceVehicle, static_cast<lsint>(IdIndex(relation.linked_ids(link_index),
service_ids_map_)));
LSExpression sequenceContainsNextService =
model.contains(sequenceVehicle,
static_cast<lsint>(IdIndex(
relation.linked_ids(link_index + 1), service_ids_map_)));
LSExpression indexOfCurrentServiceInSequence = model.indexOf(
sequenceVehicle, static_cast<lsint>(IdIndex(relation.linked_ids(link_index),
service_ids_map_)));
LSExpression indexOfNextServiceInSequence =
model.indexOf(sequenceVehicle,
static_cast<lsint>(IdIndex(
relation.linked_ids(link_index + 1), service_ids_map_)));
model.constraint(model.iif(
sequenceContainsNextService,
sequenceContainsCurrentService == sequenceContainsNextService, true));
model.constraint(model.iif(
sequenceContainsNextService,
indexOfCurrentServiceInSequence + 1 == indexOfNextServiceInSequence, true));
}
}
}
}
void capacityConstraintsOfVehicle(int k, LSExpression sequenceVehicle, LSExpression c) {
const localsolver_vrp::Vehicle& vehicle = problem.vehicles(k);
for (int unit = 0; unit < vehicle.capacities_size(); unit++) {
LSExpression quantityCumulator =
model.createLambdaFunction([&](LSExpression i, LSExpression prev) {
return model.max(
0, prev + model.at(serviceQuantitiesMatrix, sequenceVehicle[i], unit));
});
LSExpression routeQuantityUnit = model.array(model.range(0, c), quantityCumulator);
LSExpression quantityUnitChecker = model.createLambdaFunction([&](LSExpression i) {
return routeQuantityUnit[i] <= vehicle.capacities(unit).limit();
});
model.constraint(model.and_(model.range(0, c), quantityUnitChecker));
}
}
void MatrixBuilder(vector<LSExpression>& Matrices, const RepeatedField<float>& matrix) {
LSExpression Matrix(model.array());
int matrix_size = sqrt(matrix.size());
for (const auto& serviceFrom : problem.services()) {
vector<int> matrix_row;
matrix_row.reserve(matrix_size);
for (const auto& serviceTo : problem.services()) {
if (matrix.size() > 0) {
matrix_row.push_back(ceil(matrix.at(serviceFrom.matrix_index() * matrix_size +
serviceTo.matrix_index())));
} else {
matrix_row.push_back(0);
}
}
Matrix.addOperands(model.array(matrix_row.begin(), matrix_row.end()));
}
Matrices.push_back(Matrix);
}
int64 IdIndex(const string& id, map<string, int64> map_) const {
map<string, int64>::const_iterator it = map_.find(id);
if (it != map_.end())
return it->second;
else
return -1;
}
string IndexId(const int index, map<string, int64> map_) const {
for (auto it = map_.begin(); it != map_.end(); ++it) {
if (it->second == index) {
return it->first;
}
}
return "not found";
}
LSExpression needsPause(LSExpression restStart, LSExpression start, LSExpression end) {
return start <= restStart && end >= restStart;
}
LSExpression travelAndSetupEndWithPause(localsolver_vrp::Vehicle vehicle,
LSExpression i, LSExpression time,
vector<LSExpression> serviceSequences) {
int k = IdIndex(vehicle.id(), vehicle_ids_map_);
LSExpression sequenceVehicle = serviceSequences[k];
LSExpression travelAndSetupDuration =
model.iif(i == 0,
timesFromWarehouses[vehicle.matrix_index()][vehicle.start_index()]
[sequenceVehicle[0]] +
serviceSetUpDuration[sequenceVehicle[0]],
model.at(timeMatrices[vehicle.matrix_index()], sequenceVehicle[i - 1],
sequenceVehicle[i]) +
model.iif(serviceMatrixIndex[sequenceVehicle[i]] ==
serviceMatrixIndex[sequenceVehicle[i - 1]],
0, serviceSetUpDuration[i]));
LSExpression travelAndSetupEnd = time + travelAndSetupDuration;
LSExpression extraPauseDurationSelector =
model.createLambdaFunction([&](LSExpression rest_index) {
return model.iif(needsPause(Rest[k][rest_index], time, travelAndSetupEnd),
restDuration[k][rest_index], 0);
});
LSExpression extraPauseDuration =
model.sum(model.range(0, vehicle.rests_size()), extraPauseDurationSelector);
return travelAndSetupEnd + extraPauseDuration;
}
LSExpression serviceEndWithPause(localsolver_vrp::Vehicle vehicle, LSExpression service,
LSExpression time) {
LSExpression nextStartWithoutPause = nextStart(service, time);
LSExpression endWithoutPause = nextStartWithoutPause + serviceTime[service];
LSExpression firstPauseselector =
model.createLambdaFunction([&](LSExpression rest_index) {
return model.iif(
needsPause(
model.at(Rest[IdIndex(vehicle.id(), vehicle_ids_map_)], rest_index),
time, endWithoutPause),
model.at(Rest[IdIndex(vehicle.id(), vehicle_ids_map_)], rest_index),
static_cast<lsint>(CUSTOM_MAX_INT));
});
LSExpression restIndexSelector =
model.createLambdaFunction([&](LSExpression rest_index) {
return model.iif(
needsPause(
model.at(Rest[IdIndex(vehicle.id(), vehicle_ids_map_)], rest_index),
time, endWithoutPause),
rest_index, 0);
});
LSExpression firstPause =
model.min(model.range(0, vehicle.rests_size()), firstPauseselector);
LSExpression rest_index =
model.max(model.range(0, vehicle.rests_size()), restIndexSelector);
LSExpression nextStartWithPause = nextStart(
service,
firstPause + restDuration[IdIndex(vehicle.id(), vehicle_ids_map_)][rest_index]);
LSExpression endWithPause = nextStartWithPause + serviceTime[service];
return model.iif(firstPause == static_cast<lsint>(CUSTOM_MAX_INT), endWithoutPause,
endWithPause);
}
void setInitialSolution(vector<LSExpression>& serviceSequences) {
if (FLAGS_only_first_solution) {
for (auto const& route : problem.routes()) {
int vehicle_index = IdIndex(route.vehicle_id(), vehicle_ids_map_);
LSExpression sequenceVehicle = serviceSequences[vehicle_index];
for (int index_of_service_in_route = 0;
index_of_service_in_route < route.service_ids_size() - 1;
index_of_service_in_route++) {
LSExpression sequenceContainsCurrentService = model.contains(
sequenceVehicle,
static_cast<lsint>(IdIndex(route.service_ids(index_of_service_in_route),
service_ids_map_)));
LSExpression sequenceContainsNextService = model.contains(
sequenceVehicle,
static_cast<lsint>(IdIndex(route.service_ids(index_of_service_in_route + 1),
service_ids_map_)));
LSExpression indexOfCurrentServiceInSequence = model.indexOf(
sequenceVehicle,
static_cast<lsint>(IdIndex(route.service_ids(index_of_service_in_route),
service_ids_map_)));
model.constraint(sequenceContainsCurrentService == sequenceContainsNextService);
model.constraint(indexOfCurrentServiceInSequence == index_of_service_in_route);
}
}
}
model.close();
LSSolution sol = localsolver.getSolution();
std::unordered_set<string> initializedServiceIds;
map<string, localsolver_vrp::TimeWindow> used_tw_for_service_map;
for (const auto& route : problem.routes()) {
int route_index = IdIndex(route.vehicle_id(), vehicle_ids_map_);
const localsolver_vrp::Vehicle& vehicle = problem.vehicles(route_index);
if (vehicle.shift_preference() == "force_start") {
LSExpression tLTW = localsolver.getModel().getExpression(
"timeLeavingTheWarehouse" + vehicle.id());
sol.setValue(tLTW, static_cast<lsint>(vehicle.time_window().start()));
} else {
vector<int> start_time;
start_time.reserve(route.service_ids().size());
const RepeatedField timeMatrix = problem.matrices(vehicle.matrix_index()).time();
LSExpression listExpr =
localsolver.getModel().getExpression("sequence_" + vehicle.id());
LSCollection sequence = listExpr.getCollectionValue();
int time_matrix_size = sqrt(problem.matrices(vehicle.matrix_index()).time_size());
int previous_end = static_cast<int>(vehicle.time_window().start()) | 0;
int previous_location_index = vehicle.start_index();
for (const auto& service_id : route.service_ids()) {
const localsolver_vrp::Service& service =
problem.services(IdIndex(service_id, service_ids_map_));
uint current_arrival =
previous_end +
timeMatrix.at(previous_location_index * time_matrix_size +
service.matrix_index()) +
service.setup_duration();
int current_start = current_arrival;
int current_location_index = service.matrix_index();
int tw_index = 0;
if (service.time_windows_size() == 0) {
current_start = current_arrival;
} else {
for (const auto& tw : service.time_windows()) {
if (current_arrival <= (service.late_multiplier() > 0
? tw.end() + tw.maximum_lateness()
: tw.end())) {
current_start = max<uint>(current_arrival, tw.start());
used_tw_for_service_map[service_id] = tw;
break;
}
tw_index++;
}
}
start_time.push_back(current_start);
previous_end = current_start + service.duration();
previous_location_index = current_location_index;
if (service_ids_map_.count(service_id)) {
sequence.add(IdIndex(service_id, service_ids_map_));
initializedServiceIds.insert(service_id);
}
}
localsolver_vrp::Service next_service = problem.services(
IdIndex(route.service_ids(start_time.size() - 1), service_ids_map_));
localsolver_vrp::Service current_service;
for (int service_index = start_time.size() - 2; service_index >= 0;
service_index--) {
current_service = problem.services(
IdIndex(route.service_ids(service_index), service_ids_map_));
int time_between_two_starts =
start_time[service_index + 1] - start_time[service_index];
int idle_time =
time_between_two_starts -
(timeMatrix.at(current_service.matrix_index() * time_matrix_size +
next_service.matrix_index()) +
current_service.duration() +
(current_service.matrix_index() == next_service.matrix_index()
? 0
: next_service.setup_duration()));
const localsolver_vrp::TimeWindow& tw_used =
used_tw_for_service_map.find(current_service.id())->second;
if (idle_time > 0) {
if (used_tw_for_service_map.find(current_service.id()) ==
used_tw_for_service_map.end()) {
start_time[service_index] += idle_time;
} else {
// cout << current_service.id()
// << " initial start time : " << start_time[service_index] << endl;
start_time[service_index] +=
min<int>(idle_time, tw_used.end() +
(current_service.late_multiplier() > 0
? tw_used.maximum_lateness()
: 0) -
start_time[service_index]);
cout << " mooved start time : " << start_time[service_index] << endl;
}
}
next_service = current_service;
}
int setTimeLeavingWarehouse =
start_time[0] -
timeMatrix.at(
vehicle.start_index() * time_matrix_size +
problem.services(IdIndex(route.service_ids(0), service_ids_map_))
.matrix_index()) -
current_service.setup_duration();
cout << "setTimeLeavingWarehouse : " << setTimeLeavingWarehouse << endl;
;
LSExpression tLTW = localsolver.getModel().getExpression(
"timeLeavingTheWarehouse" + vehicle.id());
sol.setValue(tLTW, static_cast<lsint>(setTimeLeavingWarehouse));
}
}
LSCollection sequenceUnassigned =
localsolver.getModel().getExpression("sequence_unassigned").getCollectionValue();
for (const auto& service : problem.services()) {
if (initializedServiceIds.count(service.id()) == 0)
sequenceUnassigned.add(IdIndex(service.id(), service_ids_map_));
}
}
void ParseSolution(localsolver_result::Result* result,
const vector<LSExpression>& servicesSequence,
const vector<LSExpression> vehicleUsed) {
LSStatistics stats = localsolver.getStatistics();
long nbOfIterations = stats.getNbIterations();
result->clear_routes();
for (int route_index = 0; route_index < problem.vehicles_size(); route_index++) {
if (vehicleUsed[route_index].getValue() == 1) {
LSArray beginTimeArray = beginTime[route_index].getArrayValue();
LSArray latenessServicesOfVehicleArray =
latenessOfServicesOfVehicle[route_index].getArrayValue();
LSCollection servicesCollection =
servicesSequence[route_index].getCollectionValue();
LSArray restBeginTimeArray = Rest[route_index].getArrayValue();
localsolver_result::Route* route = result->add_routes();
if (problem.vehicles(route_index).start_index() != -1) {
localsolver_result::Activity* start_route = route->add_activities();
start_route->set_type("start");
start_route->set_index(-1);
start_route->set_start_time(startTimeVehicle[route_index].getIntValue());
}
int currentRestIndex = 0;
for (int activity_index = 0; activity_index < servicesCollection.count();
activity_index++) {
if (problem.vehicles(route_index).rests_size() > 0) {
while (restBeginTimeArray.count() > currentRestIndex &&
beginTimeArray.getIntValue(activity_index) >=
restBeginTimeArray.getIntValue(currentRestIndex)) {
localsolver_result::Activity* rest = route->add_activities();
rest->set_type("break");
rest->set_start_time(restBeginTimeArray.getIntValue(currentRestIndex));
rest->set_id(IndexId(currentRestIndex, rest_ids_map[route_index]));
currentRestIndex++;
}
}
localsolver_result::Activity* activity = route->add_activities();
activity->set_type("service");
activity->set_id(IndexId(servicesCollection[activity_index], service_ids_map_));
activity->set_index(
problem.services(servicesCollection[activity_index]).problem_index());
activity->set_start_time(beginTimeArray.getIntValue(activity_index));
activity->set_lateness(
latenessServicesOfVehicleArray.getDoubleValue(activity_index));
for (auto const& quantity :
problem.services(servicesCollection[activity_index]).quantities()) {
activity->add_quantities(quantity);
}
}
if (problem.vehicles(route_index).rests_size() > 0) {
if (restBeginTimeArray.count() > currentRestIndex) {
while (currentRestIndex < restBeginTimeArray.count()) {
localsolver_result::Activity* rest = route->add_activities();
rest->set_type("break");
rest->set_start_time(restBeginTimeArray.getIntValue(currentRestIndex));
rest->set_id(IndexId(currentRestIndex, rest_ids_map[route_index]));
currentRestIndex++;
}
}
}
auto route_costs = route->mutable_cost_details();
route_costs->set_fixed(problem.vehicles(route_index).cost_fixed());
route_costs->set_distance(routeDistanceCost[route_index].getDoubleValue());
route_costs->set_time(routeDurationCost[route_index].getDoubleValue());
route_costs->set_lateness(latenessCost[route_index].getDoubleValue());
if (problem.vehicles(route_index).end_index() != -1) {
localsolver_result::Activity* end_route = route->add_activities();
end_route->set_type("end");
end_route->set_index(-1);
end_route->set_start_time(endTimeVehicle[route_index].getIntValue());
}
} else {
localsolver_result::Route* route = result->add_routes();
localsolver_result::Activity* start_route = route->add_activities();
start_route->set_type("start");
start_route->set_index(-1);
start_route->set_start_time(startTimeVehicle[route_index].getIntValue());
localsolver_result::Activity* end_route = route->add_activities();
end_route->set_type("end");
end_route->set_index(-1);
end_route->set_start_time(startTimeVehicle[route_index].getIntValue());
}
}
result->set_iterations(nbOfIterations);
}
// Constructor
localsolver_VRP(localsolver_vrp::Problem& pb)
: problem(pb)
, localsolver()
, model(localsolver.getModel())
, timeMatrices(0, model.array())
, distanceMatrices(0, model.array())
, serviceQuantitiesMatrix(model.array())
, maxTwStarts(0)
, vehicleCapacitiesMatrix(model.array())
, endOfVehicleTimeWindow(model.array())
, serviceTwStartsArray(model.array())
, serviceTwEndsArray(model.array())
, twAbsoluteEndsArray(model.array())
, waitNextTWArray(model.array())
, startTimeVehicle(problem.vehicles_size())
, endTimeVehicle(problem.vehicles_size())
, routeDuration(problem.vehicles_size())
, routeDurationCost(problem.vehicles_size())
, routeDistance(problem.vehicles_size())
, routeDistanceCost(problem.vehicles_size())
, routeFixedCost(problem.vehicles_size())
, endTime(problem.vehicles_size())
, endTimeWithRest(problem.vehicles_size())
, beginTime(problem.vehicles_size())
, arrivalTime(problem.vehicles_size())
, waitingTime(problem.vehicles_size())
, serviceStartsInTW(problem.vehicles_size())
, latenessOfVehicle(problem.vehicles_size())
, latenessCost(problem.vehicles_size())
, latenessOfServicesOfVehicle(problem.vehicles_size())
, excessLateness(problem.vehicles_size())
, Rest(problem.vehicles_size(), model.array())
, restDuration(problem.vehicles_size(), model.array())
, rest_ids_map(problem.vehicles_size())
, timeLeavingTheWarehouse(problem.vehicles_size()) {
for (const auto& matrix : problem.matrices()) {
MatrixBuilder(timeMatrices, matrix.time());
MatrixBuilder(distanceMatrices, matrix.distance());
}
vector<int> vehicleStartIndiciesVec;
vector<int> vehicleEndIndiciesVec;
vector<vector<float>> vehicleCapacitiesMatrixVec;
int k = 0;
timesFromWarehouses.resize(problem.matrices_size());
timesToWarehouses.resize(problem.matrices_size());
distanceFromWarehouses.resize(problem.matrices_size());
distanceToWarehouses.resize(problem.matrices_size());
for (const auto& vehicle : problem.vehicles()) {
endOfVehicleTimeWindow.addOperand(
vehicle.has_time_window() ? static_cast<lsint>(vehicle.time_window().end())
: CUSTOM_MAX_INT);
vector<int> restDurationVec;
vector<LSExpression> restVec;
if (!vehicle.rests().empty()) {
int rest_index = 0;
for (auto const& rest : vehicle.rests()) {
restVec.push_back(
model.intVar(rest.time_window().start(), rest.time_window().end()));
restDurationVec.push_back(rest.duration());
rest_ids_map[k][(string)rest.id()] = rest_index;
rest_index++;
}
} else {
restVec.push_back(
model.intVar(vehicle.time_window().start(), vehicle.time_window().start()));
restDurationVec.push_back(0);
}
restDuration[k] = model.array(restDurationVec.begin(), restDurationVec.end());
Rest[k] = model.array(restVec.begin(), restVec.end());
int time_matrix_size = sqrt(problem.matrices(vehicle.matrix_index()).time_size());
int distance_matrix_size =
sqrt(problem.matrices(vehicle.matrix_index()).distance_size());
map<int, LSExpression>& vehicleStartMapTime =
timesFromWarehouses[vehicle.matrix_index()];
map<int, LSExpression>& vehicleStartMapDistance =
distanceFromWarehouses[vehicle.matrix_index()];
if (vehicleStartMapTime.find(vehicle.start_index()) == vehicleStartMapTime.end()) {
vector<int> timesFromWarehouse;
timesFromWarehouse.reserve(problem.services_size());
if (vehicle.start_index() > -1) {
if (problem.matrices(vehicle.matrix_index()).time().size() > 0) {
for (const auto& service : problem.services()) {
timesFromWarehouse.push_back(
problem.matrices(vehicle.matrix_index())
.time(vehicle.start_index() * time_matrix_size +
service.matrix_index()));
}
} else {
for (const auto& service : problem.services()) {
(void)service;
timesFromWarehouse.push_back(0);
}
}
} else {
timesFromWarehouse.resize(problem.services_size());
fill_n(timesFromWarehouse.begin(), problem.services_size(), 0);
}
vehicleStartMapTime[vehicle.start_index()] =
model.array(timesFromWarehouse.begin(), timesFromWarehouse.end());
}
if (vehicleStartMapDistance.find(vehicle.start_index()) ==
vehicleStartMapDistance.end()) {
vector<int> distanceFromWarehouse;
distanceFromWarehouse.reserve(problem.services_size());
if (vehicle.start_index() > -1) {
if (problem.matrices(vehicle.matrix_index()).distance().size() > 0) {
for (const auto& service : problem.services()) {
distanceFromWarehouse.push_back(
problem.matrices(vehicle.matrix_index())
.distance(vehicle.start_index() * distance_matrix_size +
service.matrix_index()));
}
} else {
for (const auto& service : problem.services()) {
(void)service;
distanceFromWarehouse.push_back(0);
}
}
} else {
distanceFromWarehouse.resize(problem.services_size());
fill_n(distanceFromWarehouse.begin(), problem.services_size(), 0);
}
vehicleStartMapDistance[vehicle.start_index()] =
model.array(distanceFromWarehouse.begin(), distanceFromWarehouse.end());
}
map<int, LSExpression>& vehicleEndMapTime =
timesToWarehouses[vehicle.matrix_index()];
if (vehicleEndMapTime.find(vehicle.end_index()) == vehicleEndMapTime.end()) {
vector<int> timesToWarehouse;
timesToWarehouse.reserve(problem.services_size());
if (vehicle.end_index() > -1) {
if (problem.matrices(vehicle.matrix_index()).time().size() > 0) {
for (const auto& service : problem.services()) {
timesToWarehouse.push_back(
problem.matrices(vehicle.matrix_index())
.time(service.matrix_index() * time_matrix_size +
vehicle.end_index()));
}
} else {
for (const auto& service : problem.services()) {
(void)service;
timesToWarehouse.push_back(0);
}
}
} else {
timesToWarehouse.resize(problem.services_size());
fill_n(timesToWarehouse.begin(), problem.services_size(), 0);
}
vehicleEndMapTime[vehicle.end_index()] =
model.array(timesToWarehouse.begin(), timesToWarehouse.end());
}
map<int, LSExpression>& vehicleEndMapTimeDistance =
distanceToWarehouses[vehicle.matrix_index()];
if (vehicleEndMapTimeDistance.find(vehicle.end_index()) ==
vehicleEndMapTimeDistance.end()) {
vector<int> distanceToWarehouse;
distanceToWarehouse.reserve(problem.services_size());
if (vehicle.end_index() > -1) {
if (problem.matrices(vehicle.matrix_index()).distance().size() > 0) {
for (const auto& service : problem.services()) {
distanceToWarehouse.push_back(
problem.matrices(vehicle.matrix_index())
.distance(service.matrix_index() * distance_matrix_size +
vehicle.end_index()));
}
} else {
for (const auto& service : problem.services()) {
(void)service;
distanceToWarehouse.push_back(0);
}
}
} else {
distanceToWarehouse.resize(problem.services_size());
fill_n(distanceToWarehouse.begin(), problem.services_size(), 0);
}
vehicleEndMapTimeDistance[vehicle.end_index()] =
model.array(distanceToWarehouse.begin(), distanceToWarehouse.end());
}
// cout << vehicle.id() << " " <<
// vehicleStartMapTime[vehicle.start_index()].toString()
// << endl;
// cout << vehicle.id() << " " << vehicleEndMapTime[vehicle.end_index()].toString()
// << endl;
int matrix_size =
max(sqrt(problem.matrices(vehicle.matrix_index()).time_size()),
sqrt(problem.matrices(vehicle.matrix_index()).distance_size()));
if (vehicle.start_index() == -1) {
vehicleStartIndiciesVec.push_back(matrix_size);
} else {
vehicleStartIndiciesVec.push_back(vehicle.start_index());
}
if (vehicle.end_index() == -1) {
vehicleEndIndiciesVec.push_back(matrix_size);
} else {
vehicleEndIndiciesVec.push_back(vehicle.end_index());
}
vector<float> capacityUnit;
vehicleCapacitiesMatrixVec.push_back(capacityUnit);
for (int unit_i = 0; unit_i < vehicle.capacities_size(); unit_i++) {
vehicleCapacitiesMatrixVec[k].push_back(vehicle.capacities(unit_i).limit());
}
vehicleCapacitiesMatrix.addOperand(model.array(
vehicleCapacitiesMatrixVec[k].begin(), vehicleCapacitiesMatrixVec[k].end()));
vehicle_ids_map_[(string)vehicle.id()] = k;
k++;
}
vehicleStartIndicies =
model.array(vehicleStartIndiciesVec.begin(), vehicleStartIndiciesVec.end());
vehicleEndIndicies =
model.array(vehicleEndIndiciesVec.begin(), vehicleEndIndiciesVec.end());
vector<int> serviceTimeVec;
vector<float> serviceLateMultiplierVec;
vector<int> serviceSetUpDurationVec;
vector<vector<float>> serviceQuantitiesVec;
vector<float> serviceExclusionCostVec;
vector<int> servicePriorityVec;
vector<int> serviceMatrixIndexVec;
vector<int> nbTWsVec;
int s = 0;
for (const auto& service : problem.services()) {
serviceMatrixIndexVec.push_back(service.matrix_index());
waitNextTWArray.addOperand(model.boolVar());
serviceTimeVec.push_back(service.duration());
serviceLateMultiplierVec.push_back(service.late_multiplier());
serviceSetUpDurationVec.push_back(service.setup_duration());
vector<float> serviceQuantityUnit;
serviceQuantitiesVec.push_back(serviceQuantityUnit);
for (int unit_i = 0; unit_i < service.quantities_size(); unit_i++) {
serviceQuantitiesVec[s].push_back(service.quantities(unit_i));
}
serviceQuantitiesMatrix.addOperand(
model.array(serviceQuantitiesVec[s].begin(), serviceQuantitiesVec[s].end()));
if (service.exclusion_cost() > 0) {
serviceExclusionCostVec.push_back(service.exclusion_cost() * CUSTOM_BIGNUM_COST);
} else {
serviceExclusionCostVec.push_back(1e6);
}
if (service.priority() != 4) {
servicePriorityVec.push_back(service.priority());
} else {
servicePriorityVec.push_back(4);
}
vector<int> serviceTWStarts;
vector<int> serviceTWEnds;
vector<int> serviceTWAbsoluteEnds;
if (service.time_windows_size() > 0) {
for (const auto& tw : service.time_windows()) {
serviceTWStarts.push_back(tw.start());
serviceTWEnds.push_back(tw.end());
if (static_cast<int>(tw.start()) > maxTwStarts) {
maxTwStarts = tw.start();
}
if (service.late_multiplier() > 0) {
serviceTWAbsoluteEnds.push_back(tw.end() + tw.maximum_lateness());
} else {
serviceTWAbsoluteEnds.push_back(tw.end());
}
}
} else {
serviceTWStarts.push_back(0);
serviceTWEnds.push_back(CUSTOM_MAX_INT);
serviceTWAbsoluteEnds.push_back(CUSTOM_MAX_INT);
}
serviceTWAbsoluteEnds.back();
serviceTwStartsArray.addOperand(
model.array(serviceTWStarts.begin(), serviceTWStarts.end()));
serviceTwStartsArray.setName("TW starts :");
serviceTwEndsArray.addOperand(
model.array(serviceTWEnds.begin(), serviceTWEnds.end()));
twAbsoluteEndsArray.addOperand(
model.array(serviceTWAbsoluteEnds.begin(), serviceTWAbsoluteEnds.end()));
if (service.time_windows_size() == 0) {
nbTWsVec.push_back(1);
} else {
nbTWsVec.push_back(service.time_windows_size());
}
service_ids_map_[(string)service.id()] = s;
s++;
}
serviceMatrixIndex =
model.array(serviceMatrixIndexVec.begin(), serviceMatrixIndexVec.end());
serviceTime = model.array(serviceTimeVec.begin(), serviceTimeVec.end());
serviceLateMultiplier =
model.array(serviceLateMultiplierVec.begin(), serviceLateMultiplierVec.end());
serviceSetUpDuration =
model.array(serviceSetUpDurationVec.begin(), serviceSetUpDurationVec.end());
serviceExclusionCost =
model.array(serviceExclusionCostVec.begin(), serviceExclusionCostVec.end());
servicePriority = model.array(servicePriorityVec.begin(), servicePriorityVec.end());
nbTwsArray = model.array(nbTWsVec.begin(), nbTWsVec.end());
}
// void precedenceConstraints(LSModel& model) {}
void createModelAndSolve(localsolver_result::Result* result) {
// Decision Variables :
// A tour for each vehicle
vector<LSExpression> serviceSequences;
serviceSequences.reserve(problem.vehicles_size() + 1);
for (auto vehicle : problem.vehicles()) {
serviceSequences.push_back(model.listVar(problem.services_size()));
serviceSequences.back().setName("sequence_" + vehicle.id());
}
// extra_super_vehicle
serviceSequences.push_back(model.listVar(problem.services_size()));
serviceSequences.back().setName("sequence_unassigned");
// Are the vehicles actually used?
vector<LSExpression> vehiclesUsed;
// Number of vehicles used
LSExpression nbVehiclesUsed;
vehiclesUsed.resize(problem.vehicles_size() + 1);