File "bench/check-ce/anonymous6.mlw", line 6, characters 18-27:
Sub-goal Postcondition of goal f'vc.
Prover result is: Valid (0.01s, 152 steps).

<check-ce>Check model 0 ("bench/check-ce/anonymous6.mlw", line 7, characters 10-15)
<check-ce>Checking model:
          File anonymous6.mlw:
            Line 6:
              z =
                {"type": "Record",
                 "val":
                  {"Field":
                    [{"field": "contents",
                      "value": {"type": "Integer", "val": "3"}}]}}
            Line 7:
              z =
                {"type": "Record",
                 "val":
                  {"Field":
                    [{"field": "contents",
                      "value": {"type": "Integer", "val": "3"}}]}}
<check-ce>Giant-step RAC
<rac-values>RHS evaluated for global `zero` at "WHY3DATA/stdlib/int.mlw", line 13, characters 15-19: 0
<rac-values>RHS evaluated for global `one` at "WHY3DATA/stdlib/int.mlw", line 14, characters 15-18: 1
<rac-values>Type default value for parameter `_` at NO LOC: ()
<rac-values>Value computed from postcondition for return value of call to ref at "bench/check-ce/anonymous6.mlw", line 5, characters 14-15 at "bench/check-ce/anonymous6.mlw", line 5, characters 14-15: {contents=
                                                                    0}
<rac-values>Value from model for variable `z` at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40 at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40: {contents=
                                                                    3}
<rac-values>Type default value for return value of call at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40 at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40: ()
<check-ce>Normal RAC
<rac-values>RHS evaluated for global `zero` at "WHY3DATA/stdlib/int.mlw", line 13, characters 15-19: 0
<rac-values>RHS evaluated for global `one` at "WHY3DATA/stdlib/int.mlw", line 14, characters 15-18: 1
<rac-values>Type default value for parameter `_` at NO LOC: ()
<check-ce>Result of checking model 0: SW
            - Concrete RAC: NORMAL
              File int.mlw:
                Line 13:
                  Constant zero initialization
                  zero = 0
                Line 14:
                  Constant one initialization
                  one = 1
              Unknown location:
                  _ = ()
              File anonymous6.mlw:
                Line 4:
                  _ = ()
                  Execution of main function `f` with env:
                    _ = ()
                    zero = 0
                    one = 1
                Line 5:
                  Normal execution of function `ref` with args:
                    contents = 0
                  Normal execution of function `ref'mk` with args:
                    contents = 0
                Line 6:
                  Normal execution of anonymous function with args:
                    z = {contents= 0}
                Line 4:
                  Execution of main function terminated normally
            - Abstract RAC: FAILURE (assertion at "bench/check-ce/anonymous6.mlw", line 7, characters 10-15)
              File int.mlw:
                Line 13:
                  Constant zero initialization
                  zero = 0
                Line 14:
                  Constant one initialization
                  one = 1
              Unknown location:
                  _ = ()
              File anonymous6.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 anonymous function with args:
                    z = {contents= 0}
                  z = {contents= 3}
                  result = ()
                Line 7:
                  Property failure at assertion with:
                    z = {contents= 3}
<check-ce>Check model 1 ("bench/check-ce/anonymous6.mlw", line 7, characters 10-15)
<check-ce>Checking model:
          
<check-ce>Giant-step RAC
<rac-values>RHS evaluated for global `zero` at "WHY3DATA/stdlib/int.mlw", line 13, characters 15-19: 0
<rac-values>RHS evaluated for global `one` at "WHY3DATA/stdlib/int.mlw", line 14, characters 15-18: 1
<rac-values>Type default value for parameter `_` at NO LOC: ()
<rac-values>Value computed from postcondition for return value of call to ref at "bench/check-ce/anonymous6.mlw", line 5, characters 14-15 at "bench/check-ce/anonymous6.mlw", line 5, characters 14-15: {contents=
                                                                    0}
<rac-values>Type default value for variable `z` at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40 at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40: {contents=
                                                                    0}
<rac-values>No value for return value of call at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40 at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40
<check-ce>Normal RAC
<rac-values>RHS evaluated for global `zero` at "WHY3DATA/stdlib/int.mlw", line 13, characters 15-19: 0
<rac-values>RHS evaluated for global `one` at "WHY3DATA/stdlib/int.mlw", line 14, characters 15-18: 1
<rac-values>Type default value for parameter `_` at NO LOC: ()
<check-ce>Result of checking model 1: INCOMPLETE
            - Concrete RAC: NORMAL
              File int.mlw:
                Line 13:
                  Constant zero initialization
                  zero = 0
                Line 14:
                  Constant one initialization
                  one = 1
              Unknown location:
                  _ = ()
              File anonymous6.mlw:
                Line 4:
                  _ = ()
                  Execution of main function `f` with env:
                    _ = ()
                    zero = 0
                    one = 1
                Line 5:
                  Normal execution of function `ref` with args:
                    contents = 0
                  Normal execution of function `ref'mk` with args:
                    contents = 0
                Line 6:
                  Normal execution of anonymous function with args:
                    z = {contents= 0}
                Line 4:
                  Execution of main function terminated normally
            - Abstract RAC: INCOMPLETE (terminated because missing value for return value of call at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40)
              
<check-ce-summary>Results:
- Selected model 0: SW
  - Concrete RAC: NORMAL
  - Abstract RAC: FAILURE (assertion at "bench/check-ce/anonymous6.mlw", line 7, characters 10-15)
- Checked model 1: INCOMPLETE
  - Concrete RAC: NORMAL
  - Abstract RAC: INCOMPLETE (terminated because missing value for return value of call at "bench/check-ce/anonymous6.mlw", line 6, characters 2-40)
File "bench/check-ce/anonymous6.mlw", line 7, characters 10-15:
Sub-goal Assertion of goal f'vc.
Prover result is: Unknown (unknown) (0.37s, 3000049 steps).
The contracts of some function or loop are too weak, 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 anonymous6.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 anonymous function with args:
      z = {contents= 0}
    z = {contents= 3}
    result = ()
  Line 7:
    Property failure at assertion with:
      z = {contents= 3}

