∀ (a b : Lean.Expr) (natStructId : ℕ) (la lb : Lean.Meta.Grind.Arith.Linear.LinExpr) (a_1 b_1 : Lean.Expr)
  (natStructId_1 : ℕ) (la_1 lb_1 : Lean.Meta.Grind.Arith.Linear.LinExpr),
  (Lean.Meta.Grind.Arith.Linear.IneqCnstrProof.ofEqOfNat a b natStructId la lb =
      Lean.Meta.Grind.Arith.Linear.IneqCnstrProof.ofEqOfNat a_1 b_1 natStructId_1 la_1 lb_1) =
    (a = a_1 ∧ b = b_1 ∧ natStructId = natStructId_1 ∧ la = la_1 ∧ lb = lb_1)