218 lines
8.5 KiB
Java
218 lines
8.5 KiB
Java
// Copyright 2010-2018 Google LLC
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import com.google.ortools.sat.CpModel;
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import com.google.ortools.sat.CpSolver;
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import com.google.ortools.sat.CpSolverStatus;
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import com.google.ortools.sat.IntVar;
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import com.google.ortools.sat.LinearExpr;
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import com.google.ortools.util.Domain;
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import java.util.logging.Logger;
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import java.util.Random;
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/** Tests the CP-SAT java interface. */
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public class TestSatSolver {
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static { System.loadLibrary("jniortools"); }
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private static final Logger logger = Logger.getLogger(TestSatSolver.class.getName());
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static void testDomainGetter() {
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System.out.println("testDomainGetter");
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CpModel model = new CpModel();
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// Create decision variables
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IntVar x = model.newIntVar(0, 5, "x");
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Domain d = x.getDomain();
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long[] flat = d.flattenedIntervals();
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if (flat.length != 2 || flat[0] != 0 || flat[1] != 5) {
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throw new RuntimeException("Wrong domain");
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} else {
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System.out.println(" ... test OK");
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}
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}
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static void testCrashInPresolve() {
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System.out.println("testCrashInPresolve");
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CpModel model = new CpModel();
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// Create decision variables
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IntVar x = model.newIntVar(0, 5, "x");
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IntVar y = model.newIntVar(0, 5, "y");
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// Create a linear constraint which enforces that only x or y can be greater
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// than 0.
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model.addLinearConstraint(LinearExpr.sum(new IntVar[] { x, y }), 0, 1);
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// Create the objective variable
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IntVar obj = model.newIntVar(0, 3, "obj");
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// Cut the domain of the objective variable
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model.addGreaterOrEqual(obj, 2);
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// Set a constraint that makes the problem infeasible
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model.addMaxEquality(obj, new IntVar[] { x, y });
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// Optimize objective
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model.minimize(obj);
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// Create a solver and solve the model.
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CpSolver solver = new CpSolver();
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com.google.ortools.sat.CpSolverStatus status = solver.solve(model);
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if (status != CpSolverStatus.INFEASIBLE) {
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throw new RuntimeException("Wrong status in testCrashInPresolve");
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} else {
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System.out.println(" ... test OK");
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}
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}
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private static IntVar[] entitiesOne;
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private static void testCrashInSolveWithAllowedAssignment() {
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System.out.println("testCrashInSolveWithAllowedAssignment");
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final CpModel model = new CpModel();
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final int numEntityOne = 50000;
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final int numEntityTwo = 100;
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entitiesOne = new IntVar[numEntityOne];
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for (int i = 0; i < entitiesOne.length; i++) {
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entitiesOne[i] = model.newIntVar(1, numEntityTwo, "E" + i);
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}
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final int[][] allAllowedValues = new int[numEntityTwo][entitiesOne.length];
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for (int i = 0; i < numEntityTwo; i++) {
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for (int j = 0; j < entitiesOne.length; j++) {
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allAllowedValues[i][j] = i;
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}
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}
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try {
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model.addAllowedAssignments(entitiesOne, allAllowedValues);
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} catch (final Exception e) {
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e.printStackTrace();
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}
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final Random r = new Random();
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for (int i = 0; i < entitiesOne.length; i++) {
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model.addEquality(entitiesOne[i], r.nextInt((numEntityTwo)));
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}
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final CpSolver solver = new CpSolver();
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solver.solve(model);
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System.out.println(" ... test OK");
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}
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private static void testCrashEquality() {
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System.out.println("testCrashInSolveWithAllowedAssignment");
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final CpModel model = new CpModel();
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final IntVar[] entities = new IntVar[20];
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for (int i = 0; i < entities.length; i++) {
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entities[i] = model.newIntVar(1, 5, "E" + i);
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}
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final Integer[] equalities = new Integer[] { 18, 4, 19, 3, 12 };
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addEqualities(model, entities, equalities);
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final Integer[] allowedAssignments = new Integer[] { 12, 8, 15 };
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final Integer[] allowedAssignmentValues = new Integer[] { 1, 3 };
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addAllowedAssignMents(model, entities, allowedAssignments, allowedAssignmentValues);
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final Integer[] forbiddenAssignments1 = new Integer[] { 6, 15, 19 };
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final Integer[] forbiddenAssignments1Values = new Integer[] { 3 };
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final Integer[] forbiddenAssignments2 = new Integer[] { 10, 19 };
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final Integer[] forbiddenAssignments2Values = new Integer[] { 4 };
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final Integer[] forbiddenAssignments3 = new Integer[] { 18, 0, 9, 7 };
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final Integer[] forbiddenAssignments3Values = new Integer[] { 4 };
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final Integer[] forbiddenAssignments4 = new Integer[] { 14, 11 };
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final Integer[] forbiddenAssignments4Values = new Integer[] { 1, 2, 3, 4, 5 };
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final Integer[] forbiddenAssignments5 = new Integer[] { 5, 16, 1, 3 };
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final Integer[] forbiddenAssignments5Values = new Integer[] { 1, 2, 3, 4, 5 };
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final Integer[] forbiddenAssignments6 = new Integer[] { 2, 6, 11, 4 };
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final Integer[] forbiddenAssignments6Values = new Integer[] { 1, 2, 3, 4, 5 };
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final Integer[] forbiddenAssignments7 = new Integer[] { 6, 18, 12, 2, 9, 14 };
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final Integer[] forbiddenAssignments7Values = new Integer[] { 1, 2, 3, 4, 5 };
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addForbiddenAssignments(forbiddenAssignments1Values, forbiddenAssignments1, entities, model);
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addForbiddenAssignments(forbiddenAssignments2Values, forbiddenAssignments2, entities, model);
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addForbiddenAssignments(forbiddenAssignments3Values, forbiddenAssignments3, entities, model);
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addForbiddenAssignments(forbiddenAssignments4Values, forbiddenAssignments4, entities, model);
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addForbiddenAssignments(forbiddenAssignments5Values, forbiddenAssignments5, entities, model);
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addForbiddenAssignments(forbiddenAssignments6Values, forbiddenAssignments6, entities, model);
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addForbiddenAssignments(forbiddenAssignments7Values, forbiddenAssignments7, entities, model);
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final Integer[] configuration = new Integer[] { 5, 4, 2, 3, 3, 3, 4, 3, 3, 1, 4, 4, 3, 1, 4, 1, 4, 4, 3, 3 };
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for (int i = 0; i < configuration.length; i++) {
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model.addEquality(entities[i], configuration[i]);
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}
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final CpSolver solver = new CpSolver();
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solver.solve(model);
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System.out.println(" ... test OK");
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}
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private static void addEqualities(final CpModel model, final IntVar[] entities, final Integer[] equalities) {
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for (int i = 0; i < (equalities.length - 1); i++) {
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model.addEquality(entities[equalities[i]], entities[equalities[i + 1]]);
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}
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}
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private static void addAllowedAssignMents(final CpModel model, final IntVar[] entities, final Integer[] allowedAssignments,
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final Integer[] allowedAssignmentValues) {
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final int[][] allAllowedValues = new int[allowedAssignmentValues.length][allowedAssignments.length];
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for (int i = 0; i < allowedAssignmentValues.length; i++) {
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final Integer value = allowedAssignmentValues[i];
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for (int j = 0; j < allowedAssignments.length; j++) {
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allAllowedValues[i][j] = value;
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}
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}
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final IntVar[] specificEntities = new IntVar[allowedAssignments.length];
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for (int i = 0; i < allowedAssignments.length; i++) {
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specificEntities[i] = entities[allowedAssignments[i]];
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}
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try {
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model.addAllowedAssignments(specificEntities, allAllowedValues);
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} catch (final Exception e) {
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e.printStackTrace();
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}
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}
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private static void addForbiddenAssignments(final Integer[] forbiddenAssignmentsValues, final Integer[] forbiddenAssignments,
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final IntVar[] entities, final CpModel model) {
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final IntVar[] specificEntities = new IntVar[forbiddenAssignments.length];
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for (int i = 0; i < forbiddenAssignments.length; i++) {
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specificEntities[i] = entities[forbiddenAssignments[i]];
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}
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final int[][] notAllowedValues = new int[forbiddenAssignmentsValues.length][forbiddenAssignments.length];
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for (int i = 0; i < forbiddenAssignmentsValues.length; i++) {
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final Integer value = forbiddenAssignmentsValues[i];
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for (int j = 0; j < forbiddenAssignments.length; j++) {
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notAllowedValues[i][j] = value;
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}
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}
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try {
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model.addForbiddenAssignments(specificEntities, notAllowedValues);
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} catch (final Exception e) {
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e.printStackTrace();
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}
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}
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public static void main(String[] args) throws Exception {
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testDomainGetter();
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testCrashInPresolve();
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testCrashInSolveWithAllowedAssignment();
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testCrashEquality();
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}
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}
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