Goal:
  
  A : Type
  B : Type
  C : Type
  f : A → B → C
  a : A
  l : list A
  IHl : ∀ l' : list B, #|map2 f l l'| = Init.Nat.min #|l| #|l'|
  ============================
   (BinNums.Z0 = BinNums.Z0)


DEBUG:Going to execute:
lazymatch Zify.zify_convert_to_euclidean_division_equations_flag
           with
           | true =>
               Zify.zify_internal_to_euclidean_division_equations
           | false => idtac
           end