Goal:
    x : V.t  s : VSet.t
  ============================
   (~ VSet.In x (VSet.remove x s))


DEBUG:Going to execute:
match type of P with
           | Prop =>
               match goal with
               | H':context [ H ] |- _ => clear dependent H'
               end
           | _ => fail
           end; VSetDecide.MSetDecideAuxiliary.no_logical_interdep