Detecting and Analyzing State Inconsistencies in Multi-task Software

In this paper, we first reveal an important problem called a state inconsistency problem among tasks based on a design model of a CD/DVD systems.This problem is not only of CD/DVD systems but also of typical embedded software because it may occur in a typical structure that such software has. Thus, we propose a method to detect the problem in the design model with a model checking tool and to derive behavior in which it does not occur.