{P : Sort u} →
  {lo hi lo' hi' : Lean.Meta.Grind.Arith.Cutsat.SymbolicBound} →
    Lean.Meta.Grind.Arith.Cutsat.SymbolicIntInterval.co lo hi =
        Lean.Meta.Grind.Arith.Cutsat.SymbolicIntInterval.co lo' hi' →
      (lo = lo' → hi = hi' → P) → P