Goal:
    A : Type  P : A → Prop  p : A → bool  Hp : ∀ x : A, reflect (P x) (p x)
  ============================
   (true → Forall P [])


DEBUG:Going to execute:
done
DEBUG LTAC Evaluated term: Prop
DEBUG LTAC Evaluated term: Prop
DEBUG LTAC Evaluated term: Prop
DEBUG LTAC Evaluated term: Prop