Bug73.dfy(7,14): Error: assertion violation
Execution trace:
    (0,0): anon0
    Bug73.dfy(7,19): anon3_Else
    (0,0): anon2
Bug73.dfy(13,14): Error: assertion violation
Execution trace:
    (0,0): anon0
    Bug73.dfy(13,20): anon3_Else
    (0,0): anon2

Dafny program verifier finished with 2 verified, 2 errors