Testing of Software and Communicating Systems [electronic resource] : 20th IFIP TC 6/WG 6.1 International Conference, TestCom 2008 8th International Workshop, FATES 2008 Tokyo, Japan, June 10-13, 2008 Proceedings / edited by Kenji Suzuki, Teruo Higashino, Andreas Ulrich, Toru Hasegawa.