Weakest Precondition
File "bench/ce/real.mlw", line 5, characters 28-47:
Goal test1.
Prover result is: Unknown (sat)
The following counterexample model has not been verified
  (not checking CE model, missing option --check-ce):
File real.mlw:
  Line 5:
    x [@introduced] = {"type": "Fraction", "val": "1/2"}

File "bench/ce/real.mlw", line 7, characters 28-35:
Goal test2.
Prover result is: Unknown (sat)
The following counterexample model has not been verified
  (not checking CE model, missing option --check-ce):
File real.mlw:
  Line 7:
    x [@introduced] = {"type": "Decimal", "val": "0.0"}

