@Test
public final void testAcyclic() {
bounds.bound(ac1, factory.area(factory.tuple("0", "0"), factory.tuple("4", "4")));
assertNotNull(solve(ac1.some().and(ac1.acyclic())));
assertPrimVarNum(10);
bounds.bound(r1, factory.range(factory.tuple("0"), factory.tuple("4")));
assertNotNull(solve(ac1.join(r1).some().and(ac1.acyclic())));
assertPrimVarNum(10 + bounds.upperBound(r1).size());
TupleSet ac2b = factory.setOf("5", "6", "7", "8");
ac2b = ac2b.product(ac2b);
bounds.bound(ac2, ac2b);
assertNotNull(solve(ac1.difference(ac2).some().and(ac1.acyclic()).and(ac2.acyclic())));
assertPrimVarNum(10 + 6);
bounds.boundExactly(r2, factory.setOf(factory.tuple("5", "6")));
assertNotNull(solve(ac2.join(r2).some().and(ac2.acyclic())));
final TupleSet ac3Bound = factory.allOf(2);
ac3Bound.remove(factory.tuple("9", "9"));
bounds.bound(ac3, ac3Bound);
assertNotNull(
solve(ac1.difference(ac2).union(ac3).some().and(ac1.acyclic()).and(ac2.acyclic())));
assertPrimVarNum(ac3Bound.size() + 10 + 6);
bounds.bound(to3, factory.allOf(2));
bounds.bound(ord3, factory.setOf("0", "1", "2"));
bounds.bound(first3, bounds.upperBound(ord3));
bounds.bound(last3, bounds.upperBound(ord3));
assertNotNull(
solve(to3.product(ac1).some().and(ac1.acyclic()).and(to3.totalOrder(ord3, first3, last3))));
assertPrimVarNum(bounds.upperBound(ac1).size());
}
@Test
public final void testTotalOrdering() {
bounds.bound(to1, factory.area(factory.tuple("0", "0"), factory.tuple("4", "4")));
bounds.bound(ord1, factory.setOf("0", "1", "2", "3", "4"));
bounds.bound(first1, bounds.upperBound(ord1));
bounds.bound(last1, bounds.upperBound(ord1));
final Formula ordered1 = to1.totalOrder(ord1, first1, last1);
assertNotNull(solve(to1.some().and(ordered1)));
assertPrimVarNum(0);
assertAuxVarNum(0);
assertClauseNum(0);
bounds.bound(r1, factory.range(factory.tuple("0"), factory.tuple("4")));
assertNotNull(solve(to1.join(r1).some().and(ordered1)));
assertPrimVarNum(bounds.upperBound(r1).size());
bounds.boundExactly(r1, bounds.upperBound(r1));
assertNotNull(solve(to1.join(r1).some().and(ordered1)));
assertPrimVarNum(0);
bounds.bound(to2, factory.setOf("5", "6", "7", "8", "9").product(factory.setOf("5", "7", "8")));
bounds.bound(ord2, factory.setOf("5", "7", "8"));
bounds.bound(first2, bounds.upperBound(ord2));
bounds.bound(last2, bounds.upperBound(ord2));
final Formula ordered2 = to2.totalOrder(ord2, first2, last2);
assertNotNull(solve(to1.difference(to2).some().and(ordered2).and(ordered1)));
assertPrimVarNum(0);
assertAuxVarNum(0);
assertClauseNum(0);
bounds.bound(to3, factory.allOf(2));
bounds.bound(ord3, factory.allOf(1));
bounds.bound(first3, factory.setOf("9"));
bounds.bound(last3, factory.setOf("8"));
final Formula ordered3 = to3.totalOrder(ord3, first3, last3);
assertNotNull(solve(to3.product(to1).some().and(ordered1).and(ordered3)));
assertPrimVarNum(bounds.upperBound(to3).size() + bounds.upperBound(ord3).size() + 2);
// SAT solver takes a while
// bounds.boundExactly(r2, factory.setOf(factory.tuple("9","8")));
// assertNotNull(solve(r2.in(to3).and(ordered3)));
bounds.bound(to3, factory.allOf(2));
bounds.bound(ord3, factory.setOf("3"));
bounds.bound(first3, factory.allOf(1));
bounds.bound(last3, factory.allOf(1));
Instance instance = solve(ordered3);
assertNotNull(instance);
assertTrue(instance.tuples(to3).isEmpty());
assertTrue(instance.tuples(ord3).equals(bounds.upperBound(ord3)));
assertTrue(instance.tuples(first3).equals(bounds.upperBound(ord3)));
assertTrue(instance.tuples(last3).equals(bounds.upperBound(ord3)));
}
/**
* Returns the bounds for the given scope.
*
* @return the bounds for the given scope.
*/
public final Bounds bounds(int scope) {
assert scope > 0;
final int n = scope * 3;
final List<String> atoms = new ArrayList<String>(n);
for (int i = 0; i < scope; i++) atoms.add("Object" + i);
for (int i = 0; i < scope; i++) atoms.add("Name" + i);
for (int i = 0; i < scope; i++) atoms.add("DirEntry" + i);
final Universe u = new Universe(atoms);
final TupleFactory f = u.factory();
final Bounds b = new Bounds(u);
final int max = scope - 1;
b.bound(Obj, f.range(f.tuple("Object0"), f.tuple("Object" + max)));
b.boundExactly(Root, f.setOf("Object0"));
b.bound(Cur, b.upperBound(Obj));
b.bound(File, b.upperBound(Obj));
b.bound(Dir, b.upperBound(Obj));
b.bound(Name, f.range(f.tuple("Name0"), f.tuple("Name" + max)));
b.bound(DirEntry, f.range(f.tuple("DirEntry0"), f.tuple("DirEntry" + max)));
b.bound(entries, b.upperBound(Dir).product(b.upperBound(DirEntry)));
b.bound(parent, b.upperBound(Dir).product(b.upperBound(Dir)));
b.bound(name, b.upperBound(DirEntry).product(b.upperBound(Name)));
b.bound(contents, b.upperBound(DirEntry).product(b.upperBound(Obj)));
return b;
}