Goal:
  
  A : Type
  P : list A → list A → A → A → Type
  a : A
  Γ : list A
  d' : A
  Γ'0 : list A
  Hrel : All2_fold P Γ Γ'0
  p : P Γ Γ'0 a d'
  ============================
   (list A → A → A → Type)


DEBUG:Going to execute:
exact (id0 id1)
DEBUG LTAC Evaluated term: (list A → A → A → Type)