View source for Termination Competition

= Annual International Termination Competition =

During the 90's a number of new, powerful termination methods
was developed. Thus, at the beginning of the millennium
many research groups started to develop [[:Category:Tools | tools for fully-automated termination analysis]].

After a tool demonstration at the Termination Workshop 2003 (Valencia),
the community then decided to install an annual termination competition, and to collect benchmarks,
to spur the development of tools and new termination techniques.

== Upcoming Competitions ==

* The [[Termination Competition 2024]] will be held during [https://merz.gitlabpages.inria.fr/2024-ijcar/ IJCAR 2024], July 1-6, Nancy, France.

== Organization ==

Questions and suggestions regarding the competition
should go to [[Termtools|the termtools mailing list]].
Discussion is open and happens primarily on the list.
Decisions will be made by votes among the [[Termination Competition Steering Committee]], with current members
* [https://ffrohn.github.io Florian Frohn] (Chair), RWTH Aachen
* [https://verify.rwth-aachen.de/giesl/ Jürgen Giesl], RWTH Aachen
* [http://cl-informatik.uibk.ac.at/users/georg/ Georg Moser], University of Innsbruck
* [http://lim.univ-reunion.fr/staff/epayet/ Étienne Payet], Université de La Réunion
* [https://www.cs.upc.edu/~albert/ Albert Rubio],  Complutense University of Madrid
* [https://group-mmm.org/~ayamada/ Akihisa Yamada], AIST Tokyo Waterfront

From 2004 till 2007, the competition organizer was Claude March&eacute;, [http://www.lri.fr/~marche/termination-competition/ Paris].
From 2008 to 2013 the competition was run by Ren&eacute; Thiemann, [http://termcomp.uibk.ac.at Innsbruck].
From 2014 to 2017, the competition organizer was Johannes Waldmann. Jobs were run on the [https://www.starexec.org/ Star Exec] platform at U Iowa.
From 2018 to 2023, the organizer was Akihisa Yamada.
From 2024 on, the organizer is Florian Frohn. Jobs are run on Star-Exec.

== Competition Categories ==

Currently, the competition features the following categories:
* termination of [[Term Rewriting|string and term rewriting]]
* [[Logic_Programming|termination of logic programs]]
* [[Certified_Termination|certified termination]] of string and term rewriting (since 2007)
* [[Functional_Programming|termination of functional programs]] (since 2007)
* [http://cl-informatik.uibk.ac.at/users/georg/cbr/competition/ complexity of rewrite systems] (since 2008)
* [[Java_Bytecode|termination of Java Bytecode programs]] (since 2009)
* [[Higher_Order|termination of higher order rewriting]] (since 2010)
* [[C_Programs|termination of C programs]] (since 2014)
* [[C_Complexity|complexity of C programs]]
* termination of [[Transition_Systems|integer transition systems]] (since 2014)
* [[ITRS|integer term rewriting]] (since 2014)
<!--* [[C_Integer_Programs|termination of C integer programs]]-->
* [[Cycle_Rewriting|termination of cycle rewriting]]
* [[Prob_Rewriting|termination of probabilistic term rewriting]] (since 2024)

== Termination Problems Data Base ==

The [[TPDB|Termination Problems Data Base]] collects all the problems used in the competitions. 

We welcome problem submissions from non-participants.

== History of Termination Competitions ==

The following competitions have taken place:

* [[Termination Competition 2023]] affiliated with [[WST2023]], [https://termcomp.github.io/Y2023/ Results].
* [[Termination Competition 2022]] affiliated with [https://easychair.org/smart-program/FLoC2022/IJCAR-index.html IJCAR 2022], [https://termcomp.github.io/Y2022/ Results].
* [[Termination Competition 2021]] affiliated with [http://www.cs.cmu.edu/~mheule/CADE28/ CADE 2021], [https://termcomp.github.io/Y2021/ Results].
* [[Termination Competition 2020]] affiliated with [https://ijcar2020.org/ IJCAR 2020], [https://termcomp.github.io/Y2020/ Results].
* [[Termination Competition 2019]] affiliated with [https://tacas.info/toolympics.php Toolympics at TACAS 2019], [https://termcomp.github.io/Y2019/ Results].
* [[Termination Competition 2018]] affiliated with FLoC 2018, Oxford, UK, July 13, 2018, [https://termcomp.github.io/Y2018/ Results].

* [[Termination_Competition_2017|Termination Competition 2017]] affiliated with [http://www.cs.ox.ac.uk/conferences/fscd2017/ FSCD], [http://termcomp.imn.htwk-leipzig.de/competitions/Y2017 Results of Competition], [http://termcomp.imn.htwk-leipzig.de/competitions/67 Results of demonstration]. 

* [[Termination_Competition_2016|Termination Competition 2016]] affiliated with [http://cl-informatik.uibk.ac.at/events/wst-2016/ WST (Workshop on Termination)], [http://termcomp.imn.htwk-leipzig.de/competitions/Y2016 Results of Competition]. [http://www.cs.upc.edu/~albert/papers/termcomp2016_slides.pdf Presentation at WST]

* [[Termination Competition 2015]], [http://termcomp.imn.htwk-leipzig.de/competitions/Y2015 Results of Competition], [http://www.cs.upc.edu/~albert/papers/termCompCADE2015.pdf Description paper at CADE-25] [http://www.cs.upc.edu/~albert/papers/termcomp2015_slides.pdf Report]

* [[Termination Competition 2014]], [http://termcomp.imn.htwk-leipzig.de/competitions/Y2014 Results of Competition], [http://nfa.imn.htwk-leipzig.de/termcomp/competition/23 Results of Demonstration]

*  [[Termination Competition 2013]], [http://termcomp.uibk.ac.at/termcomp/competition/competitionSummary.seam?comp=437763 Results], [http://termcomp.uibk.ac.at/2013/competition2013.pdf Report]

*  [[Termination Competition 2012]], [http://termcomp.uibk.ac.at/termcomp/competition/competitionSummary.seam?comp=362062 Results], [http://verify.rwth-aachen.de/giesl/competition2012.pdf Report]

*  [[Termination Competition 2011]], [http://termcomp.uibk.ac.at/termcomp/competition/competitionSummary.seam?comp=230715 Results], [http://termcomp.uibk.ac.at/2011/competition2011.pdf Report]

*  [[Termination Competition 2010]], [http://termcomp.uibk.ac.at/termcomp/competition/competitionSummary.seam?comp=185404 Results] 

*  Termination Competition 2009 [http://termcomp.uibk.ac.at/termcomp/competition/competitionSummary.seam?comp=101722 Results], [http://lists.lri.fr/pipermail/termtools/2009-November/000778.html Announcement]

* [[Termination_Competition_2008|Termination Competition 2008]], [http://termcomp.uibk.ac.at/termcomp/competition/competitionSummary.seam?comp=15991 Results], [http://www.imn.htwk-leipzig.de/~waldmann/talk/09/wst/ Report]
* [http://www.lri.fr/~marche/termination-competition/2007/ Termination Competition 2007], [http://www.imn.htwk-leipzig.de/~waldmann/talk/07/wst/competition/ Report]
* [http://www.lri.fr/~marche/termination-competition/2006/ Termination Competition 2006], [http://www.lri.fr/~marche/termination-competition/2006/reportCompetition2006.pdf Report]
* [http://www.lri.fr/~marche/termination-competition/2005/ Termination Competition 2005], [http://www.lri.fr/~marche/termination-competition/2005/TC.ppt Report]
* [http://www.lri.fr/~marche/termination-competition/2004/ Termination Competition 2004], [http://www.lri.fr/~marche/termination-competition/2004/slides-1jun2004.ps Report]

At the "tool demonstration" in 2003, participating provers (including AProVe, Torpa, Matchbox)
were run on the laptop computers of their developers in the room. Termination problems were announced 
on the spot by participants, then written on the blackboard, then typed in by everyone, and when a team's program
could solve it, they shouted "solved".

== Static Backups of Results ==

For many previous competitions, static backups of the results are available [https://aprove-developers.github.io/termcomp_results/ here].