Goal:
    A : Type  P : nat → A → Type  k : nat  l : list A
  ============================
   (Alli P k l → Alli (λ k' : nat, P (Nat.pred #|l| - k' + k)) 0 (List.rev l))


DEBUG:Going to execute:
<coq-core.plugins.ltac::revert@0> $1