{motive : Lean.Meta.Sym.Simp.Result → Sort u} →
  (t : Lean.Meta.Sym.Simp.Result) →
    t.ctorIdx = 1 →
      ((e' proof : Lean.Expr) → (done : Bool) → motive (Lean.Meta.Sym.Simp.Result.step e' proof done)) → motive t