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restart_monitor.h
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/******************************************************************************
* Copyright (C) 2014 Juan Antonio Garcia Martin , Peter Clote, Ivan Dotu *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
******************************************************************************/
#include "base/logging.h"
#include "util/string_array.h"
#include "constraint_solver/constraint_solver.h"
#include <ctime>
#include "strtreegroup.h"
#include "value_heuristic.h"
#include "vienna_plugin.h"
#define NOT_ASSIGNED -2
using namespace std;
namespace operations_research {
class LNSRestart : public SearchMonitor {
public:
LNSRestart(Solver* s, BaseAssignVariables* myDB_, const std::vector<IntVar*>& vSeq, vector<int*> str_int, int dangles, std::string rnaLib, std::string energyModel, vector<double> temperatures, double timeLimit, int maxRestarts, StrTreeGroup* treeGroup)
: SearchMonitor(s), myDB(myDB_), vSeq_(vSeq), str_int_(str_int), dangles_(dangles), timeLimit_(timeLimit), maxRestarts_(maxRestarts), treeGroup_(treeGroup), nRestarts(0) { //, current_fails_(0) {
CHECK_GE(maxRestarts, 1);
CHECK_GE(timeLimit, 1);
fixedPositions.assign(size(), NOT_ASSIGNED);
lastAssignment.assign(size(), true);
// ASSIGNMENT BY VALUES
// lastAssignment.assign(size(), NOT_ASSIGNED);
time(&timeLastFail);
for(int i=0; i< str_int.size(); i++){
RNAPlugin* newViennaPlugin = newRNAplugin(rnaLib,size()-1,dangles_);
newViennaPlugin->setEnergyModel(energyModel);
newViennaPlugin->setTemperature(temperatures[i]);
viennaPlugin.push_back(newViennaPlugin);
}
threshold_= initThreshold;
}
virtual ~LNSRestart() {
for(int i=0; i< viennaPlugin.size();i++){
delete(viennaPlugin.at(i));
}
}
virtual void BeginFail() {
double diffSeconds;
time_t currentTime;
time(¤tTime);
diffSeconds=difftime(currentTime,timeLastFail);
if(diffSeconds>timeLimit_){
//cout << "More than "<< timeLimit_ << " seconds since last restart: " << diffSeconds<< " - Restarts: "<< nRestarts << endl;
time(&timeLastFail);
if(nRestarts<maxRestarts_){
myDB->clearFixedPositions();
FixPositions();
// cout << "Threshold" << threshold_ << endl;
for (int i = 1; i < size(); ++i) {
if(fixedPositions[i]!=NOT_ASSIGNED){
double randVal = rand()%100;
if(randVal<threshold_){
myDB->addFixedPosition(vSeq_[i],fixedPositions[i]);
}
}
}
threshold_-=thresholdDecrease;
}
else{
// cout << " Full restart: threshold = " << threshold_ << endl;
threshold_= initThreshold;
myDB->clearFixedPositions();
nRestarts=1;
}
nRestarts++;
solver()->RestartCurrentSearch();
}
}
virtual std::string DebugString() const {
return absl::StrFormat("LNSRestart(%f %d)", timeLimit_, maxRestarts_);
}
/* virtual void EnterSearch (){
printf("ENTERING SEARCH\n");
} */
virtual void RestartSearch (){
// printf("RESTARTING SEARCH\n");
// for (int i = 1; i < size(); ++i) {
// printf("%d ",fixedPositions[i]);
// }
// printf("\n");
}
void FixPositions();
void FullRestart(){
myDB->clearFixedPositions();
for (int i = 1; i < size(); ++i) {
fixedPositions[i]=NOT_ASSIGNED;
}
nRestarts=0;
threshold_=initThreshold;
nRestarts++;
solver()->RestartCurrentSearch();
}
int GetNumRestarts(){
return nRestarts;
}
private:
const double initThreshold=90;
const double thresholdDecrease=10;
BaseAssignVariables* myDB;
const std::vector<IntVar*> vSeq_;
vector<int*> str_int_;
vector<RNAPlugin*> viennaPlugin;
int dangles_;
double threshold_;
const double timeLimit_;
const int maxRestarts_;
StrTreeGroup* treeGroup_;
int nRestarts;
int64 size() const { return vSeq_.size(); };
std::vector<int64> fixedPositions;
std::vector<bool> lastAssignment;
// ASSIGNMENT BY VALUES
// std::vector<int64> lastAssignment;
time_t timeLastFail;
};
LNSRestart* MakeLNSRestart(Solver *s, BaseAssignVariables* myDB, const std::vector<IntVar*>& vSeq, vector<int*> str_int, int dangles, std::string rnaLib, std::string energyModel, vector<double> temperatures, double timeLimit, int maxRestarts, StrTreeGroup* treeGroup);
class HelixLNSRestart : public SearchMonitor {
public:
HelixLNSRestart(Solver* s, BaseAssignVariables* myDB_, const std::vector<IntVar*>& vSeq, vector<int*> str_int, int dangles, std::string rnaLib, std::string energyModel, vector<double> temperatures, double timeLimit, int maxRestarts, StrTreeGroup* treeGroup)
: SearchMonitor(s), myDB(myDB_), vSeq_(vSeq), str_int_(str_int), dangles_(dangles), timeLimit_(timeLimit), maxRestarts_(maxRestarts), treeGroup_(treeGroup), nRestarts(0) { //, current_fails_(0) {
CHECK_GE(maxRestarts, 1);
CHECK_GE(timeLimit, 1);
fixedPositions.assign(size(), NOT_ASSIGNED);
lastAssignment.assign(size(), true);
time(&timeLastFail);
nHelices = treeGroup_->getNumHelices();
threshold_= initThreshold;
for(int i = 0; i < nHelices; i++){
RNAPlugin* newViennaPlugin = newRNAplugin(rnaLib,treeGroup_->getHelix(i)->getJ() - treeGroup_->getHelix(i)->getI()+1,dangles_);
newViennaPlugin->setEnergyModel(energyModel);
newViennaPlugin->setTemperature(temperatures[treeGroup_->getStrId(i)]);
viennaPlugin.push_back(newViennaPlugin);
}
}
virtual ~HelixLNSRestart() {
for(int i=0; i< viennaPlugin.size();i++){
delete(viennaPlugin.at(i));
}
}
virtual void BeginFail() {
double diffSeconds;
time_t currentTime;
time(¤tTime);
diffSeconds=difftime(currentTime,timeLastFail);
if(diffSeconds>timeLimit_){
// cout << "More than "<< timeLimit_ << " seconds since last restart: " << diffSeconds<< " - Restarts: "<< nRestarts << endl;
time(&timeLastFail);
if(nRestarts<maxRestarts_){
myDB->clearFixedPositions();
FixPositions();
// cout << "Threshold" << threshold_ << endl;
for (int i = 1; i < size(); ++i) {
if(fixedPositions[i]!=NOT_ASSIGNED){
double randVal = rand()%100;
if(randVal<threshold_){
myDB->addFixedPosition(vSeq_[i],fixedPositions[i]);
}
}
}
threshold_-=thresholdDecrease;
}
else{
// cout << " Full restart: threshold = " << threshold_ << endl;
threshold_= initThreshold;
myDB->clearFixedPositions();
nRestarts=0;
}
nRestarts++;
solver()->RestartCurrentSearch();
}
}
virtual std::string DebugString() const {
return absl::StrFormat("HelixLNSRestart(%f %d)", timeLimit_, maxRestarts_);
}
/* virtual void EnterSearch (){
printf("ENTERING SEARCH\n");
} */
virtual void RestartSearch (){
// printf("RESTARTING SEARCH\n");
// for (int i = 1; i < size(); ++i) {
// printf("%d ",fixedPositions[i]);
// }
// printf("\n");
}
void FixPositions();
void FullRestart(){
myDB->clearFixedPositions();
for (int i = 1; i < size(); ++i) {
fixedPositions[i]=NOT_ASSIGNED;
}
nRestarts=0;
threshold_=initThreshold;
nRestarts++;
solver()->RestartCurrentSearch();
}
int GetNumRestarts(){
return nRestarts;
}
private:
const double initThreshold=90;
const double thresholdDecrease=5;
BaseAssignVariables* myDB;
const std::vector<IntVar*> vSeq_;
vector<int*> str_int_;
vector<RNAPlugin*> viennaPlugin;
int dangles_;
double threshold_;
const double timeLimit_;
const int maxRestarts_;
StrTreeGroup* treeGroup_;
int nHelices;
int nRestarts;
int64 size() const { return vSeq_.size(); };
std::vector<int64> fixedPositions;
std::vector<bool> lastAssignment;
time_t timeLastFail;
};
HelixLNSRestart* MakeHelixLNSRestart(Solver *s, BaseAssignVariables* myDB, const std::vector<IntVar*>& vSeq, vector<int*> str_int, int dangles, std::string rnaLib, std::string energyModel, vector<double> temperatures, double timeLimit, int maxRestarts, StrTreeGroup* treeGroup);
} // namespace