Goal:
  
  A : Type
  B : Type
  C : Type
  P : nat → A → B → Type
  Q : B → C → Type
  R : nat → A → C → Type
  S : nat → A → C → Type
  n : nat
  c1' : nat
  c1'0 : list A
  c1 : list C
  ============================
   (All2i R c1' c1'0 c1
    → {| pr1 := n; pr2 := {| pr1 := []; pr2 := [] |} |} =
      {| pr1 := c1'; pr2 := {| pr1 := c1'0; pr2 := c1 |} |}
      → let H := CoreTactics.block in
        (∀ (n : nat) (x : A) (y : B) (z : C),
           P n x y → Q y z → R n x z → S n x z)
        → let H0 := CoreTactics.block in All2i S n [] [])


DEBUG:Going to execute:
intros p