<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">*********************************************************************</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">VEST 2021: 2nd Workshop on Verification of Session Types</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-weight: 700; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Online </span><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">on</span><span class="" style="font-size: 11pt; font-family: Arial; font-weight: 700; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;"> July 12, 2021</span><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">, co-located with ICALP 2021</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><a href="https://sites.google.com/view/vest21/home" class="" style="text-decoration: none;"><span class="" style="font-size: 11pt; font-family: Arial; color: rgb(17, 85, 204); font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; text-decoration: underline; text-decoration-skip: none; vertical-align: baseline; white-space: pre-wrap;">https://sites.google.com/view/vest21/home</span></a></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-weight: 700; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Submission: Monday, 21st June 2021</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;">*********************************************************************</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class=""><br class=""></span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">* </span><span class="" style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;">Call for Short Talks:</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;"><br class=""></span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><font color="#000000" face="Arial" class=""><span class="" style="font-size: 14.666666984558105px; white-space: pre-wrap;">This is a call for short talks of 10-15 mins (exact details will follow after the notification).</span></font></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><font color="#000000" face="Arial" class=""><span class="" style="font-size: 14.666666984558105px; white-space: pre-wrap;"><br class=""></span></font></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><font color="#000000" face="Arial" class=""><span class="" style="font-size: 14.666666984558105px; white-space: pre-wrap;">To register your short talk, simply follow the submission link below and enter title, authors and abstract. Make sure you add ‘(Short Talk)' to your title.</span></font></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><div class="" style="line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">* Su</span><span class="" style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;">bmission Link:</span></div><div class="" style="line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;"><br class=""></span></div></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><a href="https://easychair.org/conferences/?conf=beat2019" class="" style="text-decoration: none;"><span class="" style="font-size: 11pt; font-family: Arial; color: rgb(84, 170, 255); font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; text-decoration: underline; text-decoration-skip: none; vertical-align: baseline; white-space: pre-wrap;">https://easychair.org/conferences/?conf=</span></a><span class="" style="font-size: 11pt; font-family: Arial; color: rgb(84, 170, 255); font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; text-decoration: underline; text-decoration-skip: none; vertical-align: baseline; white-space: pre-wrap;">vest21</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><font color="#000000" face="Arial" class=""><span class="" style="font-size: 14.666666984558105px; white-space: pre-wrap;"><br class=""></span></font></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">* About VEST</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">The goal of this workshop is to bring together researchers and build and strengthen a community working on verification of session types using various theorem provers such as Agda, Coq, Isabelle or any other.</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Session types are abstract representations of the sequences of operations that computational entities (such as channels or objects) must perform. Stateful entities offer services in a non-uniform way (one cannot pop from an empty stack); traditional type systems cannot guarantee that operations are only invoked when the entity is in the right state.</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Large-scale software systems rely on message-passing protocols: their correctness largely depends on sound protocol implementations. Session types can help in the specification of correct-by-construction systems, and in verifying that programs respect their intended protocols.</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Recent years have seen a steady stream of research on behavioural types: their foundations and their transfer to several programming languages. This has led to highly-cited papers in conferences such as POPL and journals such as TOPLAS. Research projects on behavioural types have advanced the theory and applications of behavioural types.</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Although the foundations of session types are now well established, and new works build on approaches that have become standard, there is still a lack of reusable libraries, namely machine-verified ones. As on one hand the basis of most works is common, and on the other hand the complexity of the formal systems is considerable and may lead to errors in the proofs of the soundness results, machine verifying the type systems proposed is vital. Libraries, or at least clear formalisations of common approaches, is crucial to avoid not only to repeat work but also to increase the confidence in the knowledge base. Moreover, as many of these systems have a goal to do static analysis to ensure some safety or liveness property, machine verification of these approaches leads to certified software for program analysis.</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">The goal of the VEST workshop is to gather the researchers working on mechanisations of behavioural types using various theorem provers, such as Agda, Coq, Isabelle or any other. The workshop will be a platform to present both the now well-established efforts and the ongoing works the community has put on verification. The workshop will also be a forum to discuss strengths and weaknesses of existing approaches, potential obstacles and to foster collaboration.</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">* Important Dates AoE (UTC-12h)</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-weight: 700; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Submission: Monday, 21st June 2021</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Notification: Friday, 25th June 2021</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">Workshop: Monday, 12th July 2021</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">* Invited Speakers:</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">- Jesper Bengtson (IT University of Copenhagen, Denmark)</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">- Andreia Mordido (University of Lisbon, Portugal)</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">*Tutorial, jointly delivered by:</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">- David Castro-Perez (University of Kent, UK)</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">- Francisco Ferreira-Ruiz (Imperial College, UK)</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">- Lorenzo Gheri (Imperial College, UK)</span></div><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">* Program Committee:</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span class="" style="font-size: 11pt; font-family: Arial; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; vertical-align: baseline; white-space: pre-wrap;">- Robert Atkey, University of Strathclyde, UK</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Laura Bocchi, University of Kent, UK</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Ornela Dardha, University of Glasgow, UK (Co-chair)</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Cinzia Di Giusto, Université Côte d'Azur, CNRS, I3S, France</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Wen Kokke, The University of Edinburgh, UK</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Robbert Krebbers, Radboud University Nijmegen, Netherlands</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Luca Padovani , Università di Torino, Italy</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Kirstin Peters, TU Darmstadt, Germany</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- António Ravara, NOVA University of Lisbon, Portugal (Co-chair)</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Ivan Scagnetto, University of Udine, Italy</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class="">- Peter Thiemann, Universität Freiburg, Germany</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); line-height: 1.656; margin-top: 0pt; margin-bottom: 0pt;"><span style="font-family: Arial; font-size: 11pt; white-space: pre-wrap;" class=""><br class=""></span></div></body></html>