LetExpr.dfy(8,12): Error: assertion violation
Execution trace:
    (0,0): anon0
LetExpr.dfy(107,21): Error: assertion violation
Execution trace:
    (0,0): anon0
    (0,0): anon11_Then
LetExpr.dfy(251,19): Error: value assigned to a nat must be non-negative
Execution trace:
    (0,0): anon0
    (0,0): anon5_Then
LetExpr.dfy(254,19): Error: value assigned to a nat must be non-negative
Execution trace:
    (0,0): anon0
    (0,0): anon6_Then
LetExpr.dfy(256,24): Error: value assigned to a nat must be non-negative
Execution trace:
    (0,0): anon0
    (0,0): anon6_Else
LetExpr.dfy(285,14): Error: RHS is not certain to look like the pattern 'Agnes'
Execution trace:
    (0,0): anon0
    (0,0): anon3_Else
LetExpr.dfy(302,42): Error: value assigned to a nat must be non-negative
Execution trace:
    (0,0): anon0
    (0,0): anon6_Else
LetExpr.dfy(304,12): Error: assertion violation
Execution trace:
    (0,0): anon0
    (0,0): anon6_Else

Dafny program verifier finished with 38 verified, 8 errors

Dafny program verifier finished with 0 verified, 0 errors