MiscTypeInferenceTests.dfy(85,11): Warning: the type of the other operand is a non-null type, so this comparison with 'null' will always return 'false' (to make it possible for variable 'x' to have the value 'null', declare its type to be 'Node?')
MiscTypeInferenceTests.dfy(95,16): Warning: the type of the other operand is a set of non-null elements, so the non-inclusion test of 'null' will always return 'true'
MiscTypeInferenceTests.dfy(14,59): Error: value does not satisfy the subset constraints of 'neg'
Execution trace:
    (0,0): anon0
    (0,0): anon6_Then
    (0,0): anon7_Then
    (0,0): anon8_Then
MiscTypeInferenceTests.dfy(24,11): Error: value does not satisfy the subset constraints of 'int -> int'
Execution trace:
    (0,0): anon0
    (0,0): anon17_Then
    (0,0): anon18_Then
    (0,0): anon3
MiscTypeInferenceTests.dfy(27,11): Error: value does not satisfy the subset constraints of 'int ~> nat'
Execution trace:
    (0,0): anon0
    (0,0): anon19_Then
MiscTypeInferenceTests.dfy(50,13): Error: possible violation of function precondition
Execution trace:
    (0,0): anon0
MiscTypeInferenceTests.dfy(50,16): Error: assertion violation
Execution trace:
    (0,0): anon0
MiscTypeInferenceTests.dfy(109,18): Error: cannot establish the existence of LHS values that satisfy the such-that predicate
Execution trace:
    (0,0): anon0
    (0,0): anon3_Then
    (0,0): anon2
MiscTypeInferenceTests.dfy(110,18): Error: cannot establish the existence of LHS values that satisfy the such-that predicate
Execution trace:
    (0,0): anon0
    (0,0): anon3_Then
    (0,0): anon2
MiscTypeInferenceTests.dfy(143,15): Error: value does not satisfy the subset constraints of 'nat'
Execution trace:
    (0,0): anon0
MiscTypeInferenceTests.dfy(155,15): Error: value does not satisfy the subset constraints of 'nat'
Execution trace:
    (0,0): anon0

Dafny program verifier finished with 10 verified, 9 errors
