Tools and algorithms for the construction and analysis of systems : 13th International Conference, TACAS 2007, held as a part of the Joint European Conferences on Theory and Practice of Software, ETAPS 2007 : Braga, Portugal, March 24-April 1, 2007 : proceedings - Grumberg, Orna, 1952-; Huth, Michael, 1962- (Lecture notes in computer science ;, 2007)