Bug88.dfy(6,0): Error: a postcondition could not be proved on this return path
Bug88.dfy(5,12): Related location: this is the postcondition that could not be proved
Bug88.dfy(14,0): Error: a postcondition could not be proved on this return path
Bug88.dfy(13,10): Related location: this is the postcondition that could not be proved

Dafny program verifier finished with 0 verified, 2 errors
