ExpandedGuardednessNeg.dfy(8,17): Error: cannot prove termination; try supplying a decreases clause (note that calls cannot be co-recursive in this context)
Execution trace:
    (0,0): anon0
    (0,0): anon6_Else
    (0,0): anon7_Then
ExpandedGuardednessNeg.dfy(8,17): Error: decreases expression must be bounded below by 0
ExpandedGuardednessNeg.dfy(6,27): Related location
Execution trace:
    (0,0): anon0
    (0,0): anon6_Else
    (0,0): anon7_Then
ExpandedGuardednessNeg.dfy(13,16): Error: cannot prove termination; try supplying a decreases clause
Execution trace:
    (0,0): anon0
    (0,0): anon6_Else
    (0,0): anon7_Then
ExpandedGuardednessNeg.dfy(13,16): Error: decreases expression must be bounded below by 0
ExpandedGuardednessNeg.dfy(11,21): Related location
Execution trace:
    (0,0): anon0
    (0,0): anon6_Else
    (0,0): anon7_Then

Dafny program verifier finished with 0 verified, 4 errors
