The book includes 32 revised full papers and 27 revised position papers, preceded by a general introduction to the area, which also presents the vision of a grand challenge project: the "verifying compiler". Most contributions are followed by a transcription of the vivid discussion that ensued between the author and the audience. The papers have been organized in topical sections on verification tools, guaranteeing correctness, software engineering aspects, verifying object-oriented programming, programming language and methodology aspects, components, static analysis, design, analysis and tools, as well as formal techniques.