A program updating method is provided for a built-in ROM. The chip multiprocessor includes a plurality of processor cores, a memory controller, and stacked cache interface circuitry. In each of the two circumferential direction main grooves on corresponding tire shoulder sides, the fine grooves in the right and left walls are inclined to the tire circumferential direction in the same direction in a plan view in a tire radial direction. The model estimates the user activity information as user multimedia access demands during particular time periods within a day.