\input zb-basic \input zb-ioport \iteman{io-port 06011475} \itemau{Joshi, Rajeev (ed.); M\"uller, Peter (ed.); Podelski, Andreas (ed.)} \itemti{Verified software: Theories, tools, experiments. 4th international conference, VSTTE 2012, Philadelphia, PA, USA, January 28--29, 2012. Proceedings.} \itemso{Lecture Notes in Computer Science 7152. Berlin: Springer (ISBN 978-3-642-27704-7/pbk). x, 327~p. EUR~57.78 (2012).} \itemab For the preceding conference see Zbl 1193.68011. \itemrv{~} \itemcc{} \itemut{} \itemli{doi:10.1007/978-3-642-27705-4} \end