{motive_4 : Lean.Meta.Grind.Arith.Linear.IneqCnstrProof → Sort u} →
  (t : Lean.Meta.Grind.Arith.Linear.IneqCnstrProof) →
    t.ctorIdx = 5 →
      ((c₁ c₂ : Lean.Meta.Grind.Arith.Linear.IneqCnstr) →
          motive_4 (Lean.Meta.Grind.Arith.Linear.IneqCnstrProof.combine c₁ c₂)) →
        motive_4 t