Modules1.dfy(79,16): Error: assertion violation
Execution trace:
    (0,0): anon0
    (0,0): anon3_Then
Modules1.dfy(92,16): Error: assertion violation
Execution trace:
    (0,0): anon0
    (0,0): anon3_Then
Modules1.dfy(94,18): Error: assertion violation
Execution trace:
    (0,0): anon0
    (0,0): anon3_Else
Modules1.dfy(56,9): Error: decreases expression must be bounded below by 0
Modules1.dfy(54,13): Related location
Execution trace:
    (0,0): anon0
Modules1.dfy(62,9): Error: failure to decrease termination measure
Execution trace:
    (0,0): anon0

Dafny program verifier finished with 26 verified, 5 errors