{motive_6 : Lean.Meta.Grind.Arith.Linear.DiseqCnstrProof → Sort u} →
  (t : Lean.Meta.Grind.Arith.Linear.DiseqCnstrProof) →
    t.ctorIdx = 2 →
      ((a b : Lean.Expr) →
          (natStructId : ℕ) →
            (lhs rhs : Lean.Meta.Grind.Arith.Linear.LinExpr) →
              motive_6 (Lean.Meta.Grind.Arith.Linear.DiseqCnstrProof.coreOfNat a b natStructId lhs rhs)) →
        motive_6 t