Exemple #1
0
 /**
  * Constructs a new Decls with the specified head and tail.
  *
  * @requires head.size > 0 && tail.size > 0
  * @ensures this.size' = head.size + tail.size && (all i: [0..head.size) | this.decls[i] =
  *     head.decls[i]) && (all i: [head.size..this.size') | this.decls[i] = tail.decls[i])
  * @throws NullPointerException head = null || tail is null
  */
 private Decls(Decls head, Decls tail) {
   this.decls = new Decl[head.size() + tail.size()];
   System.arraycopy(head.decls, 0, decls, 0, head.size());
   System.arraycopy(tail.decls, 0, decls, head.size(), tail.size());
 }
  public static void main(String[] args) throws Exception {

    Relation x0 = Relation.unary("Int/min");
    Relation x1 = Relation.unary("Int/zero");
    Relation x2 = Relation.unary("Int/max");
    Relation x3 = Relation.nary("Int/next", 2);
    Relation x4 = Relation.unary("seq/Int");
    Relation x5 = Relation.unary("String");
    Relation x6 = Relation.unary("this/A");
    Relation x7 = Relation.unary("this/Relation");
    Relation x8 = Relation.nary("this/Relation.r", 4);

    List<String> atomlist =
        Arrays.asList(
            "-1",
            "-2",
            "-3",
            "-4",
            "-5",
            "-6",
            "-7",
            "-8",
            "0",
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "A$0",
            "A$1",
            "A$2",
            "Relation$0",
            "unused0",
            "unused1");

    Universe universe = new Universe(atomlist);
    TupleFactory factory = universe.factory();
    Bounds bounds = new Bounds(universe);

    TupleSet x0_upper = factory.noneOf(1);
    x0_upper.add(factory.tuple("-8"));
    bounds.boundExactly(x0, x0_upper);

    TupleSet x1_upper = factory.noneOf(1);
    x1_upper.add(factory.tuple("0"));
    bounds.boundExactly(x1, x1_upper);

    TupleSet x2_upper = factory.noneOf(1);
    x2_upper.add(factory.tuple("7"));
    bounds.boundExactly(x2, x2_upper);

    TupleSet x3_upper = factory.noneOf(2);
    x3_upper.add(factory.tuple("-8").product(factory.tuple("-7")));
    x3_upper.add(factory.tuple("-7").product(factory.tuple("-6")));
    x3_upper.add(factory.tuple("-6").product(factory.tuple("-5")));
    x3_upper.add(factory.tuple("-5").product(factory.tuple("-4")));
    x3_upper.add(factory.tuple("-4").product(factory.tuple("-3")));
    x3_upper.add(factory.tuple("-3").product(factory.tuple("-2")));
    x3_upper.add(factory.tuple("-2").product(factory.tuple("-1")));
    x3_upper.add(factory.tuple("-1").product(factory.tuple("0")));
    x3_upper.add(factory.tuple("0").product(factory.tuple("1")));
    x3_upper.add(factory.tuple("1").product(factory.tuple("2")));
    x3_upper.add(factory.tuple("2").product(factory.tuple("3")));
    x3_upper.add(factory.tuple("3").product(factory.tuple("4")));
    x3_upper.add(factory.tuple("4").product(factory.tuple("5")));
    x3_upper.add(factory.tuple("5").product(factory.tuple("6")));
    x3_upper.add(factory.tuple("6").product(factory.tuple("7")));
    bounds.boundExactly(x3, x3_upper);

    TupleSet x4_upper = factory.noneOf(1);
    x4_upper.add(factory.tuple("0"));
    x4_upper.add(factory.tuple("1"));
    x4_upper.add(factory.tuple("2"));
    bounds.boundExactly(x4, x4_upper);

    TupleSet x5_upper = factory.noneOf(1);
    bounds.boundExactly(x5, x5_upper);

    TupleSet x6_upper = factory.noneOf(1);
    x6_upper.add(factory.tuple("A$0"));
    x6_upper.add(factory.tuple("A$1"));
    x6_upper.add(factory.tuple("A$2"));
    bounds.boundExactly(x6, x6_upper);

    TupleSet x7_upper = factory.noneOf(1);
    x7_upper.add(factory.tuple("unused0"));
    x7_upper.add(factory.tuple("unused1"));
    x7_upper.add(factory.tuple("Relation$0"));
    bounds.bound(x7, x7_upper);

    TupleSet x8_upper = factory.noneOf(4);
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("unused1")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1"))
            .product(factory.tuple("A$2")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$0")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$1")));
    x8_upper.add(
        factory
            .tuple("Relation$0")
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2"))
            .product(factory.tuple("A$2")));
    bounds.bound(x8, x8_upper);

    bounds.boundExactly(-8, factory.range(factory.tuple("-8"), factory.tuple("-8")));
    bounds.boundExactly(-7, factory.range(factory.tuple("-7"), factory.tuple("-7")));
    bounds.boundExactly(-6, factory.range(factory.tuple("-6"), factory.tuple("-6")));
    bounds.boundExactly(-5, factory.range(factory.tuple("-5"), factory.tuple("-5")));
    bounds.boundExactly(-4, factory.range(factory.tuple("-4"), factory.tuple("-4")));
    bounds.boundExactly(-3, factory.range(factory.tuple("-3"), factory.tuple("-3")));
    bounds.boundExactly(-2, factory.range(factory.tuple("-2"), factory.tuple("-2")));
    bounds.boundExactly(-1, factory.range(factory.tuple("-1"), factory.tuple("-1")));
    bounds.boundExactly(0, factory.range(factory.tuple("0"), factory.tuple("0")));
    bounds.boundExactly(1, factory.range(factory.tuple("1"), factory.tuple("1")));
    bounds.boundExactly(2, factory.range(factory.tuple("2"), factory.tuple("2")));
    bounds.boundExactly(3, factory.range(factory.tuple("3"), factory.tuple("3")));
    bounds.boundExactly(4, factory.range(factory.tuple("4"), factory.tuple("4")));
    bounds.boundExactly(5, factory.range(factory.tuple("5"), factory.tuple("5")));
    bounds.boundExactly(6, factory.range(factory.tuple("6"), factory.tuple("6")));
    bounds.boundExactly(7, factory.range(factory.tuple("7"), factory.tuple("7")));

    Variable x12 = Variable.unary("this");
    Decls x11 = x12.oneOf(x7);
    Expression x16 = x12.join(x8);
    Expression x18 = x6.product(x6);
    Expression x17 = x6.product(x18);
    Formula x15 = x16.in(x17);
    Variable x21 = Variable.unary("x21");
    Decls x20 = x21.oneOf(x6);
    Expression x25 = x21.join(x16);
    Expression x26 = x6.product(x6);
    Formula x24 = x25.in(x26);
    Variable x29 = Variable.unary("x29");
    Decls x28 = x29.oneOf(x6);
    Expression x32 = x29.join(x25);
    Formula x31 = x32.one();
    Formula x33 = x32.in(x6);
    Formula x30 = x31.and(x33);
    Formula x27 = x30.forAll(x28);
    Formula x23 = x24.and(x27);
    Variable x36 = Variable.unary("x36");
    Decls x35 = x36.oneOf(x6);
    Expression x38 = x25.join(x36);
    Formula x37 = x38.in(x6);
    Formula x34 = x37.forAll(x35);
    Formula x22 = x23.and(x34);
    Formula x19 = x22.forAll(x20);
    Formula x14 = x15.and(x19);
    Variable x42 = Variable.unary("x42");
    Decls x41 = x42.oneOf(Expression.UNIV);
    Variable x45 = Variable.unary("x45");
    Decls x44 = x45.oneOf(Expression.UNIV);
    Decls x40 = x41.and(x44);
    Expression x50 = x42.product(x45);
    Expression x51 = x6.product(x6);
    Formula x49 = x50.in(x51);
    Variable x54 = Variable.unary("x54");
    Decls x53 = x54.oneOf(x6);
    Expression x57 = x54.join(x50);
    Formula x56 = x57.one();
    Formula x58 = x57.in(x6);
    Formula x55 = x56.and(x58);
    Formula x52 = x55.forAll(x53);
    Formula x48 = x49.and(x52);
    Variable x61 = Variable.unary("x61");
    Decls x60 = x61.oneOf(x6);
    Expression x63 = x50.join(x61);
    Formula x62 = x63.in(x6);
    Formula x59 = x62.forAll(x60);
    Formula x47 = x48.and(x59);
    Expression x66 = x16.join(x45);
    Expression x65 = x66.join(x42);
    Formula x64 = x65.in(x6);
    Formula x46 = x47.implies(x64);
    Formula x39 = x46.forAll(x40);
    Formula x13 = x14.and(x39);
    Formula x10 = x13.forAll(x11);
    Expression x70 = x8.join(Expression.UNIV);
    Expression x69 = x70.join(Expression.UNIV);
    Expression x68 = x69.join(Expression.UNIV);
    Formula x67 = x68.in(x7);
    Formula x71 = x0.eq(x0);
    Formula x72 = x1.eq(x1);
    Formula x73 = x2.eq(x2);
    Formula x74 = x3.eq(x3);
    Formula x75 = x4.eq(x4);
    Formula x76 = x5.eq(x5);
    Formula x77 = x6.eq(x6);
    Formula x78 = x7.eq(x7);
    Formula x79 = x8.eq(x8);
    Formula x9 =
        Formula.compose(FormulaOperator.AND, x10, x67, x71, x72, x73, x74, x75, x76, x77, x78, x79);

    Solver solver = new Solver();
    solver.options().setSolver(SATFactory.DefaultSAT4J);
    solver.options().setBitwidth(4);
    solver.options().setFlatten(false);
    solver.options().setIntEncoding(Options.IntEncoding.TWOSCOMPLEMENT);
    solver.options().setSymmetryBreaking(20);
    solver.options().setSkolemDepth(0);

    System.out.println(PrettyPrinter.print(x9, 0));
    System.out.println(bounds);

    System.out.println("Solving...");
    System.out.flush();
    Solution sol = solver.solve(x9, bounds);
    System.out.println(sol.toString());

    Instance inst = sol.instance();
    Evaluator ev = new Evaluator(inst);

    System.out.println("Universe: " + ev.evaluate(Expression.UNIV));
    Formula xx = x46.forAll(x40).forAll(x11);
    System.out.println(PrettyPrinter.print(xx, 2));
    System.out.println(ev.evaluate(xx));

    System.out.println(PrettyPrinter.print(x46, 4));

    //        Variable r = Variable.unary("this");
    //        Variable u1 = Variable.unary("u1");
    //        Variable u2 = Variable.unary("u2");
    //
    //        Formula ff =
    // u1.product(u2).in(x6.product(x6)).forAll(u1.oneOf(Expression.UNIV).and(u2.oneOf(Expression.UNIV))).forAll(r.oneOf(x7));
    //        System.out.println(PrettyPrinter.print(ff, 0));
    //        System.out.println(ev.evaluate(ff));

  }
 /**
  * Returns the arity of this comprehension expression, which is the sum of the arities of declared
  * variables
  *
  * @return #this.decls
  */
 public int arity() {
   return decls.size();
 }