### Question:
BooleanAlgebra { public boolean hasNDistinctWitnesses(P predicate, Integer numOfWitnesses) { for (int witnessID = 0; witnessID < numOfWitnesses; witnessID++) { try { S witness = generateWitness(predicate); if (witness != null) { predicate = MkAnd(predicate, MkNot(MkAtom(witness))); } else { return false; } } catch (TimeoutException e) { e.printStackTrace(); System.out.println("Distinct witnesses check timeout."); return false; } } return true; }  abstract P MkAtom(S s); abstract P MkNot(P p); abstract P MkOr(Collection<P> pset); abstract P MkOr(P p1, P p2); abstract P MkAnd(Collection<P> pset); abstract P MkAnd(P p1, P p2); abstract P True(); abstract P False(); abstract boolean AreEquivalent(P p1, P p2); abstract boolean IsSatisfiable(P p1); abstract boolean HasModel(P p1, S el); abstract boolean HasModel(P p1, S el1, S el2); abstract S generateWitness(P p1); abstract Pair<S, S> generateWitnesses(P p1); boolean hasNDistinctWitnesses(P predicate, Integer numOfWitnesses); Collection<Pair<P, ArrayList<Integer>>> GetMinterms(
			ArrayList<P> predicates); Collection<Pair<P, ArrayList<Integer>>> GetMinterms(
			ArrayList<P> predicates, long timeout); ArrayList<P> GetSeparatingPredicates(
			ArrayList<Collection<S>> characterGroups, long timeout); ArrayList<P> GetSeparatingPredicatesFromPredicates(
			ArrayList<Collection<P>> predicateGroups, long timeout);  }### Answer:
@Test public void testHasNDistinctWitnesses() { CharPred integers = new CharPred('0', '9'); assertTrue(ba.hasNDistinctWitnesses(integers, 5)); assertTrue(ba.hasNDistinctWitnesses(integers, 0)); assertTrue(ba.hasNDistinctWitnesses(integers, 10)); assertFalse(ba.hasNDistinctWitnesses(integers, 11)); }