This book constitutes the thoroughly refereed post-workshop proceedings of the 9th International Workshop on Web Services and Formal Methods, WS-FM 2012, held in Tallinn, Estonia, in September 2012. The 9 papers presented were carefully reviewed and selected from 19 submissions. They cover aspects such as the modeling and analysis of web services, service discovery, and service coordination with formal methods like BPEL, CSP, Maude, and Petri nets.

This book constitutes the refereed proceedings of the Joint 21st International Workshop on Formal Methods for Industrial Critical Systems and the 16th International Workshop on Automated Verification of Critical Systems, FMICS-AVoCS 2016, held in Pisa, Italy, in September 2016.The 11 full papers and 4 short papers presented together with one invited talk were carefully reviewed and selected from 24 submissions. They are organized in the following sections: automated verification techniques; model-based system analysis; and applications and case studies.