(motive : MProd (Subarray (Lean.Compiler.LCNF.Arg Lean.Compiler.LCNF.Purity.pure)) Bool → Sort u_1) →
  (r : MProd (Subarray (Lean.Compiler.LCNF.Arg Lean.Compiler.LCNF.Purity.pure)) Bool) →
    ((s : Subarray (Lean.Compiler.LCNF.Arg Lean.Compiler.LCNF.Purity.pure)) → (ret : Bool) → motive ⟨s, ret⟩) → motive r