Tools and Algorithms for the Construction and Analysis of Systems 20th International Conference, TACAS 2014, Held as Part of the European Joint Conferences on Theory and Practice of Software, ETAPS 2014, Grenoble, France, April 5-13, 2014. Proceedings - Ábrahám, Erika; Havelund, Klaus (Springer Berlin Heidelberg : Imprint: Springer, 2014)