Automata.Z3.Tests.Z3_TreeTransducerTests.TestRegularLookaheadComposition2 C# (CSharp) Method

        public void TestRegularLookaheadComposition2()
        {
            Z3Provider Z = new Z3Provider();
            var A = (Z.TT.MkRankedAlphabet("A", Z.IntSort, new string[] { "zeroA", "oneA", "twoA" }, new int[] { 0, 1, 2 }));
            var B = (Z.TT.MkRankedAlphabet("B", Z.IntSort, new string[] { "zeroB", "oneB", "twoB" }, new int[] { 0, 1, 2 }));
            var C = (Z.TT.MkRankedAlphabet("C", Z.IntSort, new string[] { "zeroC", "oneC", "twoC" }, new int[] { 0, 1, 2 }));

            var _0 = Z.MkInt(0);
            var _1 = Z.MkInt(1);
            var _2 = Z.MkInt(2);

            var AB_r0 = Z.TT.MkTreeRule(A, B, 0, "oneA", Z.MkEq(_0, A.AttrVar), B.MkTree("oneB", Z.MkAdd(_1, A.AttrVar), A.MkTrans(B, 1, 1)), new int[][] { new int[] { 1 } });
            var AB_r1 = Z.TT.MkTreeRule(A, B, 1, "oneA", Z.MkEq(_1, A.AttrVar), B.MkTree("oneB", Z.MkAdd(_1, A.AttrVar), A.MkTrans(B, 0, 1)), new int[][] { new int[] { 0 } });
            var AB_r2 = Z.TT.MkTreeRule(A, B, 1, "oneA", Z.MkEq(_2, A.AttrVar), B.MkTree("zeroB", Z.MkAdd(_1, A.AttrVar)));

            //just accept the input if the attribute is 1 and delete the child subtree
            var BC_r0 = Z.TT.MkTreeRule(B, C, 0, "oneB", Z.MkEq(_1, B.AttrVar), C.MkTree("zeroC", B.AttrVar));

            var AB = Z.TT.MkTreeAutomaton(0, A, B, new TreeRule[] { AB_r0, AB_r1, AB_r2});
            var BC = Z.TT.MkTreeAutomaton(0, B, C, new TreeRule[] { BC_r0 });

            var AC = TreeTransducer.ComposeR(AB, BC);

            Assert.AreEqual<int>(4, AC.RuleCount);
        }