Augusto Sampaio - Böcker

This volume contains papers presented at UTP 2019, the 7th International Symposium on Unifying Theories of Programming, held in Porto, Portugal, on the 8th of October 2019. The papers contained in this volume were invited, and friendly refereed, original contributions sought from the UTP community.

This Festschrift, dedicated to Jim Woodcock, contains papers written by many of his closest collaborators.After a PhD on software verification at the University of Liverpool, Jim has combined a successful career in academia with outstanding industry research, in particular he has been a pioneer in applying mathematical modelling approaches in critical industries. At GEC's Hirst Research Centre he worked on a novel distributed telephone exchange and a service specification of a PABX exchange. In Oxford he collaborated with IBM Hursley Laboratories on modelling of the CICS transaction processing system, one of the most significant software systems ever. As part of the UK government's cybersecurity strategy, he used Z techniques to develop secure office automation systems and a secure version of UNIX. He worked with the Smith Institute and BR Research to verify the safety of railway signalling systems, approaches developed further in safety-critical control systems for the UK Nuclear Installation Inspectorate and British Energy. He provided a technically complete theory of correctness for Z, verifying its soundness from first principles, and completed the verification of Mondex, a smartcard-based electronic cash system, the first application of a general theory of program correctness to an industrial product. He coordinated the experimental work of the Verified Software Initiative, an international grand challenge. More recently he extended the collection of standard Unifying Theories of Programming (UTP) with work on object orientation and hybrid systems. Currently he is working on a UTP theory of probabilistic programs with application to robotics.Jim has been a lecturer, research fellow, reader and professor at the University of Surrey, the University of Oxford, the University of Kent, and since 2004 the University of York, and he is a visiting professor at the Federal University of Pernambuco and Trinity College Dublin. He is a Fellow of the Royal Academy of Engineering, the British Computer Society, and the Formal Methods Europe association, and he was part of the team that won the Queen’s Award for Technological Achievement in 1992. He is the Editor-in-Chief of the ACM journal Formal Aspects of Computing, he has chaired major related academic conferences, and he has contributed to CCITT and Z ISO international standards.Throughout all these activities, Jim has been a guide and inspiration to colleagues and students, and collaborated successfully with researchers in the UK, Brazil, China, France, USA, Ireland, and Singapore. Many of these researchers show in their contributions to this volume the ongoing impact of his work.

The open access book set LNCS 16556 + 16557 constitutes the refereed proceedings of the 27th International Symposium on Formal Methods, FM 2026, held in Tokyo, Japan, during May 18–22, 2026. The 49 full and 2 short papers included in these proceedings were carefully reviewed and selected from 239 submissions. The proceedings also include 4 invited talks, 8 tutorial papers, and 9 papers from the industry day track. The contributions were organized in topical sections as follows:Part I: Invited Papers; and Main Track (1)Part II: Main Track (2); Tests and Proofs Track (TAP); Tutorial Track; and Industry Day Track

The open access book set LNCS 16556 + 16557 constitutes the refereed proceedings of the 27th International Symposium on Formal Methods, FM 2026, held in Tokyo, Japan, during May 18–22, 2026. The 49 full and 2 short papers included in these proceedings were carefully reviewed and selected from 239 submissions. The proceedings also include 4 invited talks, 8 tutorial papers, and 9 papers from the industry day track. The contributions were organized in topical sections as follows:Part I: Invited Papers; and Main Track (1)Part II: Main Track (2); Tests and Proofs Track (TAP); Tutorial Track; and Industry Day Track

This book constitutes the refereed proceedings of the 13th International Colloquium on Theoretical Aspects of Computing, ICTAC 2016, held in Taipei, Taiwan, in October 2016.The 23 revised full papers presented together with two short papers, two invited papers and one abstract of an invited paper were carefully reviewed and selected from 60 submissions. The papers are organized in topical sections on program verification; design, synthesis and testing; calculi; specifications; composition and transformation; automata; temporal logics; tool and short papers.

The Pernambuco School on Software Engineering (PSSE) 2004 was the ?rst in a series of events devoted to the study of advanced computer science and to the promotion of international scienti?c collaboration. The main theme in 2004 was re?nement (or rei?cation). Re?nement describes the veri?able relationship between a speci?cation and its implementation; it also describes the process of discoveringappropriateimplementations,givena speci?cation.Thus,in oneway or another, re?nement is at the heart of the programming process, and so is the major daily activity of everyprofessionalsoftwareengineer. The Summer School and its proceedings were intended to give a detailed tutorial introduction to the scienti?c basis of this activity. These proceedings record the contributions from the invited lecturers. Each chapter is the result of a thorough revision of the initial notes provided to the participants of the school. The revision was inspired by the synergy generated by the opportunity for the lecturers to present and discuss their work among themselves, and with the school’s attendees. The editors have tried to produce a coherent view of the topic by harmonizing these contributions, smoothing out di?erences in notation and approach, and providing links between the lectures. We apologize to the authors for any errors introduced by our extensive editing. Although the chapters are linked in severalways, each one is su?ciently se- contained to be read in isolation. Nevertheless, Chap. 1 should be read ?rst by those interested in an introduction to re?nement.

The Pernambuco School on Software Engineering (PSSE) 2007 was the second in a series of events devoted to the study of advanced computer science and to the promotion of international scienti?c collaboration. The main theme in 2007 was testing. Testing is nowadays a key activity for assuring software quality. The summer school and its proceedings were intended to give a detailed tutorial introduction to the scienti?c basis of this activity and its state of the art. Theseproceedingsrecordthecontributionsfromtheinvitedlecturers.Eachof thechaptersistheresultofathoroughrevisionoftheinitialnotesprovidedtothe participants of the school. The revision was inspired by the synergy generated by the opportunity for the lecturers to present and discuss their work among themselves and with the school’s attendees. The editors have tried to produce a coherent view of the topic by harmonizing these contributions, smoothing out di?erences in notation and approach, and providing links between the lectures. We apologize to the authors for any errors introduced by our extensive editing. Although the chapters are linked in severalways, each one is su?ciently se- contained to be read in isolation. Nevertheless, Chap. 1 should be read ?rst by those interested in an introduction to testing. Chapter 1 introduces the terminology adopted in this book. It also provides an overview of the testing process, and of the types (functional, structural, and so on)anddimensions(unit,integration,andsoon)ofthetestingactivity.Themain strategies employed in the central activity of test selection are also discussed. Most of the material presented in this introductory chapter is addressedin more depth in the following chapters.