\bibitem{PCousot-PPDP-15} P.~Cousot. \newblock Verification by Abstract Interpretation, Soundness and Abstract Induction. \newblock In \emph{Proceedings of the 17th International Symposium on Principles and Practice of Declarative Programming (PPDP 2015)}, Siena, Italy, July 14-16, 2015, Elvira Albert and Moreno Falaschi (Eds), \textcopy~ACM SIGPLAN, 2015.