File "bench/check-ce/func_call2.mlw", line 8, characters 12-21:
Sub-goal Postcondition of goal g'vc.
Prover result is: Valid (9 steps).

<check_ce:categorization>Categorizations of models:
- Selected model 0: NC
  - Concrete RAC: FAILURE (postcondition at "bench/check-ce/func_call2.mlw", line 9, characters 12-26)
  - Abstract RAC: FAILURE (postcondition at "bench/check-ce/func_call2.mlw", line 9, characters 12-26)
- Checked model 1: NC
  - Concrete RAC: FAILURE (postcondition at "bench/check-ce/func_call2.mlw", line 9, characters 12-26)
  - Abstract RAC: FAILURE (postcondition at "bench/check-ce/func_call2.mlw", line 9, characters 12-26)
- Checked model 2: NC
  - Concrete RAC: FAILURE (postcondition at "bench/check-ce/func_call2.mlw", line 9, characters 12-26)
  - Abstract RAC: FAILURE (postcondition at "bench/check-ce/func_call2.mlw", line 9, characters 12-26)
File "bench/check-ce/func_call2.mlw", line 9, characters 12-26:
Sub-goal Postcondition of goal g'vc.
Prover result is: Unknown (unknown) (12 steps).
The program does not comply to the verification goal, for example during the
  following execution:
File int.mlw:
  Line 13:
    Constant zero initialization
    zero = 0
  Line 14:
    Constant one initialization
    one = 1
File func_call2.mlw:
  Line 4:
    Constant z initialization
    (giant-step) execution of unimplemented function with args:
    result = 0
    Normal execution of function `ref` with args:
      contents = 0
    Normal execution of function `ref'mk` with args:
      contents = 0
    z = {contents= 0}
  Line 6:
    x = 0
    x = 0
    Execution of main function `g` with env:
      z = {contents= 0}
      x = 0
      zero = 0
      one = 1
  Line 10:
    Normal execution of function `contents` with args:
      arg = {contents= 0}
    Normal execution of function `(+)` with args:
      _ = 0
      _ = 1
  Line 11:
    Normal execution of function `(+)` with args:
      _ = 0
      _ = 1
  Line 9:
    Property failure at postcondition of `g` with:
      x = 0
      result = 1

