{P : Sort u} →
  {c c' : Lean.Meta.Grind.Arith.Cutsat.CooperSplit} →
    Lean.Meta.Grind.Arith.Cutsat.DvdCnstrProof.cooper₂ c = Lean.Meta.Grind.Arith.Cutsat.DvdCnstrProof.cooper₂ c' →
      (c = c' → P) → P