This book constitutes the refereed proceedings of the 6th International Conference on Test and Proofs, TAP 2012, held in Prague, Czech Republic, in May/June 2012, as part of the TOOLS 2012 Federated Conferences. The 9 revised full papers presented together with 2 invited papers, 4 short papers and one tutorial were carefully reviewed and selected from 29 submissions. The papers are devoted to the convergence of tests and proofs for developing novel techniques and application that support engineers in building secure, safe, and reliable systems. Among the topics covered are model-based testing; scenario-based testing; complex data structure generation; and the validation of protocols and libraries.

This book constitutes the refereed proceedings of the 7th International Conference of B Users, B 2007, held in Besancon, France in January 2007.

The 30 revised full papers presented together with 4 invited contributions were carefully reviewed and selected from numerous submissions. The topics of interest to the conference included: industrial applications and case studies using B, integration of model-based specification methods in the software development lifecycle, derivation of hardware-software architecture from model-based specifications, expressing and validating requirements through formal models, in particular verifying security policies, theoretical issues in formal development, model-based software testing, tools supporting the B method, development by composition of specifications, validation of assembly of COTS by model-based specification methods, B extensions and/or standardization.