DTypes.dfy(182,3): Error BP5003: A postcondition might not hold on this return path.
DTypes.dfy(181,15): Related location: This is the postcondition that might not hold.
Execution trace:
    (0,0): anon0
DTypes.dfy(18,14): Error: assertion violation
Execution trace:
    (0,0): anon0
DTypes.dfy(56,18): Error: assertion violation
Execution trace:
    (0,0): anon0
DTypes.dfy(121,13): Error: assertion violation
DTypes.dfy(93,30): Related location
Execution trace:
    (0,0): anon0
DTypes.dfy(127,13): Error: assertion violation
DTypes.dfy(93,20): Related location
Execution trace:
    (0,0): anon0
DTypes.dfy(137,12): Error: assertion violation
DTypes.dfy(132,6): Related location
DTypes.dfy(93,20): Related location
Execution trace:
    (0,0): anon0
DTypes.dfy(158,12): Error: assertion violation
Execution trace:
    (0,0): anon0
    (0,0): anon5_Then
    (0,0): anon6_Then
    (0,0): anon4

Dafny program verifier finished with 36 verified, 7 errors