<div dir="ltr"><span id="gmail-docs-internal-guid-c5789b23-7fff-dd9e-88f1-b668daf500be"><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">(apologies for multiple copies)</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Call for Papers</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">8th Workshop on Horn Clauses for Verification and Synthesis (HCVS) Co-located with</span><a href="https://etaps.org/" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:700;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> ETAPS 2021</span></a></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">28 March 2021 - Virtual</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><a href="https://www.sci.unich.it/hcvs21/">https://www.sci.unich.it/hcvs21/</a></span></p><br><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Invited speakers:</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">TBA. Please visit the webpage for updates. </span></p><br><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Submission deadlines:</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">- Paper submission: Jan 28, 2021</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">- Paper notification: Feb 27, 2021</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">- Workshop: Mar 28, 2021</span></p><br><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Many Program Verification and Synthesis problems of interest can be modelled directly using Horn clauses and many recent advances in the CLP and CAV communities have centred around efficiently solving problems presented as Horn clauses.</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">This series of workshops aims to bring together researchers working in the two communities of Constraint/Logic Programming (e.g., ICLP and CP), Program Verification (e.g., CAV, TACAS, and VMCAI), and Automated Deduction (e.g., CADE, IJCAR), on the topic of Horn clause based analysis, verification, and synthesis.</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Horn clauses for verification and synthesis have been advocated by these communities at different times and from different perspectives and HCVS is organized to stimulate interaction and a fruitful exchange and integration of experiences.</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The workshop follows seven previous meetings: HCVS 2020 in Dublin, Ireland (ETAPS 2020), HCVS 2019 in Prague, Czech Republic (ETAPS 2019), HCVS 2018 in Oxford, UK (CAV, ICLP and IJCAR at FLoC 2018), HCVS 2017 in Gothenburg, Sweden (CADE), HCVS 2016 in Eindhoven, The Netherlands (ETAPS), HCVS 2015 in San Francisco, CA, USA (CAV), and HCVS 2014 in Vienna, Austria (VSL).</span></p><br><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Topics of interest include, but are not limited to the use of Horn clauses, constraints, and related formalisms in the following areas:</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Analysis and verification of programs and systems of various kinds (e.g., imperative, object-oriented, functional, logic, higher-order, concurrent, transition systems, Petri-nets, smart contracts)</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Program synthesis</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Program testing</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Program transformation</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Constraint solving</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Type systems</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Machine learning and automated reasoning</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-CHC encoding of analysis and verification problems</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Resource analysis</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Case studies and tools</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Challenging problems</span></p><br><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">We solicit regular papers describing the theory and implementation of Horn-clause based analysis and tool descriptions. We also solicit extended abstracts describing work-in-progress, as well as presentations covering previously published results and posters that are of interest to the workshop.</span></p><br><h3 dir="ltr" style="line-height:1.8;text-align:justify;margin-top:0pt;margin-bottom:11pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">CHC Competition: </span></h3><p dir="ltr" style="line-height:1.656;text-align:justify;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">HCVS 2021 will host the 4th competition on constraint Horn clauses (</span><a href="https://chc-comp.github.io/" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> CHC-COMP</span></a><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">), which will compare state-of-the-art tools for CHC solving for performance and effectiveness on a set of publicly available benchmarks. A report on the 4th CHC-COMP will be part of the workshop's proceedings. The report also contains tool descriptions of the participating solvers.</span></p><br><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Program Committee: </span></p><br><ul style="margin-top:0px;margin-bottom:0px"><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://bishoksan.github.io/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Bishoksan Kafle</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, IMDEA Software Institute, Madrid, Spain (co-chair)</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://www.cs.rit.edu/~hh/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Hossein Hojjat</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Rochester Institute of Technology, NY, USA (co-chair)</span></p></li></ul><ul style="margin-top:0px;margin-bottom:0px"><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://utdallas.edu/chairs/profiles/dr-gopal-gupta/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Gopal Gupta</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, University of Texas at Dallas, USA</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="http://webhotel4.ruc.dk/~jpg/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">John Gallagher</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Roskilde University, Denmark</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://katalog.uu.se/profile/?id=N11-35" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Philipp Ruemmer</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Uppsala University, Sweden</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://www.microsoft.com/en-us/research/people/rybal/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Andrey Rybalchenko</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Microsoft Research, Cambridge, UK</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://software.imdea.org/people/pedro.lopez/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Pedro Lopez-Garcia</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, CSIC and IMDEA Software Institute, Madrid, Spain</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="http://saks.iasi.cnr.it/emanuele/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Emanuele De Angelis</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, IASI-CNR, Italy</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://www.sci.unich.it/~fioravan/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Fabio Fioravanti</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, University of Chieti-Pescara, Italy</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://www.mpi-sws.org/people/neider/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Daniel Neider</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Max Planck Institute for Software Systems, Germany</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://arieg.bitbucket.io/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Arie Gurfinkel</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, University of Waterloo, Canada</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://ranjitjhala.github.io/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Ranjit Jhala</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, University of California San Diego, USA</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://www.martinschaef.de/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Martin Schäf</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, SRI International, USA</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"><a href="https://herowanzhu.github.io/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">He Zhu</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Rutgers University, New Brunswick, USA</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"><a href="http://www.bristol.ac.uk/engineering/people/steven-j-ramsay/index.html" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Steven Ramsay</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, University of Bristol, UK</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"><a href="https://www.cs.fsu.edu/~grigory/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Grigory Fedyukovich</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Florida State University, USA</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"><a href="https://www.sosy-lab.org/people/ernst/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Gidon Ernst</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, Ludwig Maximilian University of Munich, Germany</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"><a href="http://www-verimag.imag.fr/~monniaux/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">David Monniaux</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, CNRS, VERIMAG, France</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:14pt;font-family:Arial;color:rgb(91,91,91);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"><a href="https://jorgenavas.github.io/" style="text-decoration-line:none"><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Jorge A. Navas</span></a><span style="font-size:11pt;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, SRI International, USA</span></p></li></ul><p dir="ltr" style="line-height:1.38;margin-left:36pt;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"> </p><p dir="ltr" style="line-height:1.38;margin-left:36pt;background-color:rgb(251,251,251);margin-top:0pt;margin-bottom:0pt"> </p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The submission has to be done in one of the following formats:</span></p><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Regular papers (up to 12 pages plus bibliography in</span><a href="http://www.eptcs.org/" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> EPTCS</span></a><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> (<a href="http://www.eptcs.org/">http://www.eptcs.org/</a>) format), which should present previously unpublished work (completed or in progress), including descriptions of research, tools, and applications.</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Tool papers (up to 4 pages in EPTCS format), including the papers written by the CHC-COMP participants, which can outline the theoretical framework, the architecture, the usage, and experiments of the tool.</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Extended abstracts (up to 3 pages in EPTCS format), which describe work in progress or aim to initiate discussions.</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Presentation-only papers, i.e., papers already submitted or presented at a conference or another workshop. Such papers can be submitted in any format, and will not be included in the workshop post-proceedings.</span></p><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">-Posters that are of interest to the workshop</span></p><br><br><p dir="ltr" style="line-height:1.656;text-align:justify;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">All submitted papers will be refereed by the program committee and will be selected for inclusion in accordance with the referee reports. Accepted regular papers and extended abstracts will be published electronically as a volume in the Electronic Proceedings in Theoretical Computer Science (EPTCS) series, see</span><a href="http://www.eptcs.org/" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> http://www.eptcs.org/</span></a><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> (provided that enough regular papers are accepted).</span></p><br><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Papers must be submitted through the EasyChair system using the web page:</span><a href="https://easychair.org/conferences/?conf=hcvs2021" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> </span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">https://easychair.org/conferences/?conf=hcvs2021</span></a></span><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><h6><span>The race is not always won by the fastest runner, but sometimes by those who just keep running.</span></h6></div></div>