Goal:
    A : Type  P : list A → list A → A → A → Type  Γ : list A
  ============================
   (All_fold (λ (Γ : list A) (d : A), P Γ Γ d d) Γ <~> All2_fold P Γ Γ)


DEBUG:Going to execute:
fun => <coq-core.plugins.ltac::split@0>