In a receiving apparatus which has an agent function of retrieving user’s favorite programs, if there is a program, among the favorite programs, which should be viewed in real time, a user is notified of the program before the broadcast start time. The program is decomposed for bounded model checking into subproblems by creating a tunnel based on disjunctive control paths through the program. One example embodiment includes exposing a cavity between at least two electrical parts within an electrical device, and routing a first electrical component through the cavity and routing a second electrical component in a divergent path to the first electrical component, wherein the first and second electrical component have a common start and end point.