File: recursive_model.mlw

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module Test
  use int.Int

  type nat = Z | S nat

  val global : nat

  let test (i : int)
  = assert {
      let _p = (0, 0) in (* <- The tuple introduces polymorphism! *)
      global <> Z -> i = 0
    }
end

(* adapted from https://gitlab.inria.fr/why3/why3/-/issues/578 *)