File "bench/check-ce/for.mlw", line 8, characters 25-31:
Sub-goal Loop invariant init of goal f'vc.
Prover result is: Valid (246 steps).

<check_ce:categorization>Categorizations of models:
- Selected model 0: SW
  - Concrete RAC: NORMAL
  - Abstract RAC: FAILURE (loop invariant preservation at "bench/check-ce/for.mlw", line 8, characters 16-31)
- Checked model 1: SW
  - Concrete RAC: NORMAL
  - Abstract RAC: FAILURE (loop invariant preservation at "bench/check-ce/for.mlw", line 8, characters 16-31)
File "bench/check-ce/for.mlw", line 8, characters 25-31:
Sub-goal Loop invariant preservation of goal f'vc.
Prover result is: Unknown (unknown + incomplete) (533 steps).
The contracts of the following functions/loops are too weak :
  - Loop at "bench/check-ce/for.mlw", line 7, character 2 to line 13, character 6
  - Loop at "bench/check-ce/for.mlw", line 7, character 2 to line 13, character 6
, for example during the following execution:
File int.mlw:
  Line 13:
    Constant zero initialization
    zero = 0
  Line 14:
    Constant one initialization
    one = 1
Unknown location:
    _ = ()
File for.mlw:
  Line 4:
    _ = ()
    Execution of main function `f` with env:
      _ = ()
      zero = 0
      one = 1
  Line 5:
    Giant-step execution of function `ref` with args:
      contents = 0
    result of `ref` = {contents= 0}
  Line 6:
    Giant-step execution of function `ref` with args:
      contents = 0
    result of `ref` = {contents= 0}
  Line 7:
    Giant-step iteration of loop
    x1 = {contents= (- 1)}
    x2 = {contents= 0}
    i = 0
    Giant-step iteration of loop
  Line 9:
    Normal execution of function `(=)` with args:
      x = 0
      y = 0
  Line 10:
    Normal execution of function `contents` with args:
      arg = {contents= (- 1)}
    Normal execution of function `(+)` with args:
      _ = (- 1)
      _ = 1
  Line 8:
    Property failure at loop invariant preservation with:
      x1 = {contents= 0}
      i = 1

File "bench/check-ce/for.mlw", line 8, characters 25-31:
Sub-goal Loop invariant preservation of goal f'vc.
Prover result is: Valid (449 steps).

