ComputationsNeg.dfy(7,3): Error: failure to decrease termination measure
Execution trace:
    (0,0): anon0
    (0,0): anon3_Else
ComputationsNeg.dfy(11,1): Error BP5003: A postcondition might not hold on this return path.
ComputationsNeg.dfy(10,17): Related location: This is the postcondition that might not hold.
Execution trace:
    (0,0): anon0
ComputationsNeg.dfy(23,1): Error BP5003: A postcondition might not hold on this return path.
ComputationsNeg.dfy(22,11): Related location: This is the postcondition that might not hold.
Execution trace:
    (0,0): anon0
ComputationsNeg.dfy(36,13): Error: assertion violation
Execution trace:
    (0,0): anon0
ComputationsNeg.dfy(45,13): Error: assertion violation
Execution trace:
    (0,0): anon0

Dafny program verifier finished with 7 verified, 5 errors