def difference(timeseries, interval=1):
    diff = []
    for i in range(interval, len(timeseries)):
        value = timeseries[i] - timeseries[i - interval]
        diff.append(value)
    return np.array(diff)

diff_ts = difference(trend_ts)

plt.figure(figsize=(12, 6))
plt.plot(time[1:], diff_ts, label='Дифференцированный ряд')
plt.legend()
plt.title('Ряд после дифференцирования')
plt.show()

adf_test(diff_ts)