protected Solver intlincomb(int[][] domains, int[] coeffs, int b, int op) {
Solver solver = new Solver();
IntVar[] bins = new IntVar[domains.length];
for (int i = 0; i < domains.length; i++) {
bins[i] =
VariableFactory.bounded(
"v_" + i, domains[i][0], domains[i][domains[i].length - 1], solver);
}
String opname = "=";
if (op != 0) {
if (op > 0) {
opname = ">=";
} else {
opname = "<=";
}
}
IntVar sum = VariableFactory.bounded("scal", -99999999, 99999999, solver);
Constraint[] cstrs =
new Constraint[] {
IntConstraintFactory.scalar(bins, coeffs, sum),
IntConstraintFactory.arithm(sum, opname, b)
};
solver.post(cstrs);
solver.set(IntStrategyFactory.lexico_LB(bins));
return solver;
}
@Test(groups = "1s")
public void testSimpleAuto() {
Solver solver = new Solver();
int n = 10;
IntVar[] vars = new IntVar[n];
for (int i = 0; i < n; i++) {
vars[i] = VariableFactory.enumerated("x_" + i, 0, 2, solver);
}
FiniteAutomaton auto = new FiniteAutomaton();
int start = auto.addState();
int end = auto.addState();
auto.setInitialState(start);
auto.setFinal(start);
auto.setFinal(end);
auto.addTransition(start, start, 0, 1);
auto.addTransition(start, end, 2);
auto.addTransition(end, start, 2);
auto.addTransition(end, start, 0, 1);
solver.post(IntConstraintFactory.regular(vars, auto));
solver.set(IntStrategyFactory.lexico_LB(vars));
solver.findAllSolutions();
Assert.assertEquals(solver.getMeasures().getSolutionCount(), 59049);
}
@Test(groups = "10s")
public void testMax2() {
Random random = new Random();
for (int seed = 169; seed < 9999; seed++) {
random.setSeed(seed);
int[][] domains =
DomainBuilder.buildFullDomains(
3, 1, 15, random, random.nextDouble(), random.nextBoolean());
Solver ref = new Solver();
{
IntVar[] xs = new IntVar[3];
xs[0] = VariableFactory.enumerated("x", domains[0], ref);
xs[1] = VariableFactory.enumerated("y", domains[1], ref);
xs[2] = VariableFactory.enumerated("z", domains[2], ref);
maxref(ref, xs[0], xs[1], xs[2]);
// SearchMonitorFactory.log(ref, true, true);
ref.set(IntStrategyFactory.random_value(xs, seed));
}
Solver solver = new Solver();
{
IntVar[] xs = new IntVar[3];
xs[0] = VariableFactory.enumerated("x", domains[0], solver);
xs[1] = VariableFactory.enumerated("y", domains[1], solver);
xs[2] = VariableFactory.enumerated("z", domains[2], solver);
max(solver, xs[0], xs[1], xs[2]);
// SearchMonitorFactory.log(solver, true, true);
solver.set(IntStrategyFactory.random_value(xs, seed));
}
ref.findAllSolutions();
solver.findAllSolutions();
Assert.assertEquals(
solver.getMeasures().getSolutionCount(),
ref.getMeasures().getSolutionCount(),
"SOLUTIONS (" + seed + ")");
// BEWARE: MAX does not ensure AC, unlike reformulation; so nb of nodes can be different...
// Assert.assertTrue(solver.getMeasures().getNodeCount() <=
// ref.getMeasures().getNodeCount(), "NODES (" + seed + "): "
// + solver.getMeasures().getNodeCount() + " vs. " +
// ref.getMeasures().getNodeCount());
}
}
@Test(groups = "10s")
public void testMax1() {
Random random = new Random();
for (int seed = 1; seed < 9999; seed++) {
random.setSeed(seed);
int[][] domains = DomainBuilder.buildFullDomains(3, 1, 15);
Solver ref = new Solver();
{
IntVar[] xs = new IntVar[3];
xs[0] = VariableFactory.bounded("x", domains[0][0], domains[0][1], ref);
xs[1] = VariableFactory.bounded("y", domains[1][0], domains[1][1], ref);
xs[2] = VariableFactory.bounded("z", domains[2][0], domains[2][1], ref);
maxref(ref, xs[0], xs[1], xs[2]);
// SearchMonitorFactory.log(ref, true, true);
ref.set(IntStrategyFactory.random_bound(xs, seed));
}
Solver solver = new Solver();
{
IntVar[] xs = new IntVar[3];
xs[0] = VariableFactory.bounded("x", domains[0][0], domains[0][1], solver);
xs[1] = VariableFactory.bounded("y", domains[1][0], domains[1][1], solver);
xs[2] = VariableFactory.bounded("z", domains[1][0], domains[2][1], solver);
max(solver, xs[0], xs[1], xs[2]);
// SearchMonitorFactory.log(solver, true, true);
solver.set(IntStrategyFactory.random_bound(xs, seed));
}
ref.findAllSolutions();
solver.findAllSolutions();
Assert.assertEquals(
solver.getMeasures().getSolutionCount(),
ref.getMeasures().getSolutionCount(),
"SOLUTIONS (" + seed + ")");
Assert.assertTrue(
solver.getMeasures().getNodeCount() <= ref.getMeasures().getNodeCount(),
"NODES (" + seed + ")");
}
}
@Test(groups = "10s")
public void compareVersionSpeedNew() {
int n = 14;
FiniteAutomaton auto = new FiniteAutomaton("(0|1|2)*(0|1)(0|1)(0|1)(0|1|2)*");
Solver solver = new Solver();
IntVar[] vars = new IntVar[n];
for (int i = 0; i < n; i++) {
vars[i] = VariableFactory.enumerated("x_" + i, 0, 2, solver);
}
solver.post(IntConstraintFactory.regular(vars, auto));
solver.set(IntStrategyFactory.lexico_LB(vars));
solver.findAllSolutions();
Assert.assertEquals(solver.getMeasures().getSolutionCount(), 4371696);
}
@Test(groups = "1s")
public void compareVersionSpeedNew2() {
int n = 5;
FiniteAutomaton auto = new FiniteAutomaton("(0|<10>|<20>)*(0|<10>)");
Solver solver = new Solver();
IntVar[] vars = new IntVar[n];
for (int i = 0; i < n; i++) {
vars[i] = VariableFactory.enumerated("x_" + i, new int[] {0, 10, 20}, solver);
}
solver.post(IntConstraintFactory.regular(vars, auto));
solver.set(IntStrategyFactory.lexico_LB(vars));
Chatterbox.showSolutions(solver);
solver.findAllSolutions();
Assert.assertEquals(solver.getMeasures().getSolutionCount(), 162);
}
@Test(groups = "1s")
public void ccostregular2() {
Solver solver = new Solver();
int n = 12;
IntVar[] vars = new IntVar[n];
for (int i = 0; i < n; i++) {
vars[i] = VariableFactory.enumerated("x_" + i, 0, 2, solver);
}
// different rules are formulated as patterns that must NOT be matched by x
List<String> forbiddenRegExps = new ArrayList<>();
// do not end with '00' if start with '11'
forbiddenRegExps.add("11(0|1|2)*00");
// at most three consecutive 0
forbiddenRegExps.add("(0|1|2)*0000(0|1|2)*");
// no pattern '112' at position 5
forbiddenRegExps.add("(0|1|2){4}112(0|1|2)*");
// pattern '12' after a 0 or a sequence of 0
forbiddenRegExps.add("(0|1|2)*02(0|1|2)*");
forbiddenRegExps.add("(0|1|2)*01(0|1)(0|1|2)*");
// at most three 2 on consecutive even positions
forbiddenRegExps.add("(0|1|2)((0|1|2)(0|1|2))*2(0|1|2)2(0|1|2)2(0|1|2)*");
// a unique automaton is built as the complement language composed of all the forbidden patterns
FiniteAutomaton auto = new FiniteAutomaton();
for (String reg : forbiddenRegExps) {
FiniteAutomaton a = new FiniteAutomaton(reg);
auto = auto.union(a);
auto.minimize();
}
auto = auto.complement();
auto.minimize();
Assert.assertEquals(auto.getNbStates(), 54);
solver.post(IntConstraintFactory.regular(vars, auto));
solver.set(IntStrategyFactory.lexico_LB(vars));
solver.findAllSolutions();
Assert.assertEquals(solver.getMeasures().getSolutionCount(), 25980);
}
public static void testOp(int n, int min, int max, int cMax, int seed, Operator operator) {
Random random = new Random(seed);
Solver s = new Solver();
IntVar[] vars = new IntVar[n];
int[] coeffs = new int[n];
for (int i = 0; i < vars.length; i++) {
vars[i] = VariableFactory.enumerated("v_" + i, min, max, s);
coeffs[i] = random.nextInt(cMax);
}
int constant = -random.nextInt(cMax);
IntVar sum = VariableFactory.bounded("scal", -99999999, 99999999, s);
Constraint[] cstrs =
new Constraint[] {
IntConstraintFactory.scalar(vars, coeffs, sum),
IntConstraintFactory.arithm(sum, operatorToString(operator), constant)
};
s.post(cstrs);
s.set(IntStrategyFactory.lexico_LB(vars));
s.findAllSolutions();
}
@Override
public void configureSearch() {
solver.set(IntStrategyFactory.minDom_MidValue(true, vars));
}
@Override
public void configureSearch() {
solver.set(IntStrategyFactory.minDom_LB(vars));
}
@Override
public void configureSearch() {
solver.set(IntStrategyFactory.minDom_LB(ArrayUtils.append(rows)));
}
@Override
public void configureSearch() {
solver.set(IntStrategyFactory.domOverWDeg(v, 0));
}