Dafny program verifier finished with 2 verified, 0 errors
Program compiled successfully
Running...

1 = 1
3 = 3
3 = 3
0 = 0
3 = 3
4 = 4
3 = 3
4 = 4
3 = 3
4 = 4
4 = 4
5 = 5
55 = 55
0 = 0
1 = 1