Strongest Postcondition
File "bench/ce/recursive_model.mlw", line 11, characters 21-26:
Sub-goal Assertion of goal test'vc.
Prover result is: Unknown or time/memory/step limit.
The following counterexample model has not been verified
  (not checking CE model, missing option --check-ce):
File recursive_model.mlw:
  Line 8:
    i [@introduced] = {"type": "Integer", "val": "3"}

