Answer Set Programming

Answer Set Programming (ASP) is a modern approach towards true declarative programming (and declarative problem solving). Based on non monotonic reasoning, it represents an important logic-programming paradigm. Any program consists of (logical) rules, which describe the problem of interest. Programs are then evaluated under the answer-set semantics (or stable model semantics), such that each of the program's answer sets is a solution. Therefore, one is focused on describing some problem by the means of specifying appropriate rules, rather than bothering about how to solve the problem.
We are mainly interested in using ASP as efficient computational approach to tackle problems of our other research areas, for example, we compute different semantics of Argumentation Frameworks using an ASP based system ASPARTIX.

Former Research Associate
Knowledge-Based Systems

Dr. Johannes Fichte

Former Research Associate

M.Sc. Lukas Schweizer

Former Research Associate
Computational Logic

M.Sc. Satyadharma Tirtarasa

Former Research Associate
Automata Theory

Journal Articles

Johannes Klaus Fichte, Sarah Alice Gaggl, Markus Hecher, Dominik Rusovac
IASCAR: Incremental Answer Set Counting by Anytime Refinement
Theory and Practice of Logic Programming, 24(3):505-532, May 2024
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Tobias Philipp, Valentin Roland, Lukas Schweizer
Smoke Test Planning using Answer Set Programming
International Journal of Interactive Multimedia and Artificial Intelligence, 6(5):57--65, February 2021
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Sarah Alice Gaggl, Thomas Linsbichler, Marco Maratea, Stefan Woltran
Design and results of the second international competition on computational models of argumentation
Artificial Intelligence, 279:103193, February 2020
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Federico Cerutti, Sarah Alice Gaggl, Matthias Thimm, Johannes Peter Wallner
Foundations of Implementations for Formal Argumentation
The IfCoLog Journal of Logics and their Applications; Special Issue Formal Argumentation, 4:2623-2705, September 2017
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Wolfgang Dvořák, Sarah Alice Gaggl
Stage semantics and the SCC-recursive schema for argumentation semantics
Journal of Logic and Computation, 26(4):1149-1202, August 2016
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Günther Charwat, Wolfgang Dvořák, Sarah Alice Gaggl, Johannes Peter Wallner, Stefan Woltran
Methods for Solving Reasoning Problems in Abstract Argumentation – A Survey
Artificial Intelligence Journal, 220(0):28-63, March 2015
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Sarah Alice Gaggl, Norbert Manthey, Alessandro Ronca, Johannes Peter Wallner, Stefan Woltran
Improved Answer-Set Programming Encodings for Abstract Argumentation
Theory and Practice of Logic Programming (TPLP), 15(4-5):434-448, September 2015
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Uwe Egly, Sarah Alice Gaggl, Stefan Woltran
Answer-set programming encodings for argumentation frameworks
Argument & Computation, 1(2):147-177, 2010
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Proceedings Articles

Lukas Gerlach, David Carral, Markus Hecher
Finite Groundings for ASP with Functions: A Journey through Consistency (Technical Report)
In Kate Larson, eds., Proceedings of the Thirty-Third International Joint Conference on Artificial Intelligence, IJCAI-24, 3386-3394, August 2024. International Joint Conferences on Artificial Intelligence Organization
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Dominik Rusovac, Markus Hecher, Martin Gebser, Sarah Alice Gaggl, Johannes K. Fichte
Navigating and Querying Answer Sets: How Hard Is It Really and Why?
In Pierre Marquis, Magdalena Ortiz, Maurice Pagnucco, eds., Proceedings of the 21st International Conference on Principles of Knowledge Representation and Reasoning (KR 2024), 642–653, November 2024. IJCAI Organization
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Elisa Böhl, Sarah Alice Gaggl, Dominik Rusovac
Representative Answer Sets: Collecting Something of Everything
In Kobi Gal, Ann Nowé, Grzegorz J. Nalepa, Roy Fairstein, Roxana Radulescu, eds., Proceedings of the 26th European Conference on Artificial Intelligence (ECAI 2023), 271--278, September 2023. IOS Press
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Elisa Böhl, Sarah Alice Gaggl
Tunas - Fishing for Diverse Answer Sets: A Multi-Shot Trade up Strategy
In Georg Gottlob, Daniela Inclezan, Marco Maratea, eds., Proceedings of the 16th International Conference on Logic Programming and Non-monotonic Reasoning (LPNMR 2022), volume 13416 of Lecture Notes in Computer Science, 89-102, August 2022. Springer International Publishing
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Raimund Dachselt, Sarah Alice Gaggl, Markus Krötzsch, Julián Méndez, Dominik Rusovac, Mei Yang
NEXAS: A Visual Tool for Navigating and Exploring Argumentation Solution Spaces
In Francesca Toni, eds., Proceedings of the 9th International Conference on Computational Models of Argument (COMMA 2022), volume 220146 of FAIA, 116-127, September 2022. IOS Press
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Stefan Ellmauthaler, Sarah Alice Gaggl, Dominik Rusovac, Johannes P. Wallner
ADF - BDD : An ADF Solver Based on Binary Decision Diagrams
In Francesca Toni, eds., Proceedings of the 9th International Conference on Computational Models of Argument (COMMA 2022), volume 220146 of FAIA, 355-356, September 2022. IOS Press
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Johannes Klaus Fichte, Sarah Alice Gaggl, Markus Hecher, Dominik Rusovac
IASCAR: Incremental Answer Set Counting by Anytime Refinement
In Georg Gottlob, Daniela Inclezan, Marco Maratea, eds., Proceedings of the 16th International Conference on Logic Programming and Non-monotonic Reasoning (LPNMR 2022), volume 13416 of Lecture Notes in Computer Science, 217-230, August 2022. Springer International Publishing
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Johannes Klaus Fichte, Sarah Alice Gaggl, Dominik Rusovac
Rushing and Strolling among Answer Sets - Navigation Made Easy
Proceedings of the 36th AAAI Conference on Artificial Intelligence (AAAI 2022), volume 36 of 5, 5651-5659, June 2022
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Johannes Klaus Fichte, Sarah Alice Gaggl, Dominik Rusovac
Rushing and Strolling among Answer Sets – Navigation Made Easy (Extended Abstract)
In Yuliya Lierler, Jose F. Morales, Carmine Dodaro, Veronica Dahl, Martin Gebser, Tuncay Tekle, eds., Technical Communication Proceeding of the 38th International Conference on Logic Programming (ICLP 2022), volume 364 of EPTCS, 181-184, 2022. Open Publishing Association
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Sarah Alice Gaggl, Philipp Hanisch, Markus Krötzsch
Simulating Sets in Answer Set Programming
In Luc De Raedt, eds., Proceedings of the 31st International Joint Conference on Artificial Intelligence (IJCAI 2022), 2634--2640, 2022. ijcai.org
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Wolfgang Dvořák, Sarah Alice Gaggl, Anna Rapberger, Johannes Peter Wallner, Stefan Woltran
The ASPARTIX System Suite
Proceedings of the 8th International Conference on Computational Models of Argument (COMMA 2020), volume 326 of Frontiers in Artificial Intelligence and Applications, 461-462, September 2020
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Markus Krötzsch
Computing Cores for Existential Rules with the Standard Chase and ASP
In Diego Calvanese, Esra Erdem, Michael Thielscher, eds., Proceedings of the 17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020), 603-613, 2020. IJCAI
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Mei Yang, Sarah Alice Gaggl, Sebastian Rudolph
Neva – Extension Visualization for Argumentation Frameworks
Proceedings of the 8th International Conference on Computational Models of Argument (COMMA 2020), volume 326 of Frontiers in Artificial Intelligence and Applications, 477-478, September 2020
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Sebastian Rudolph, Lukas Schweizer, Zhihao Yao
SPARQL Queries over Ontologies Under the Fixed-Domain Semantics
In Abhaya C. Nayak, Alok Sharma, eds., PRICAI 2019: Trends in Artificial Intelligence - 16th Pacific Rim International Conference on Artificial Intelligence, Cuvu, Yanuca Island, Fiji, August 26-30, 2019, Proceedings, Part I, volume 11670 of Lecture Notes in Computer Science, 486--499, August 2019. Springer
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Sebastian Rudolph, Lukas Schweizer, Satyadharma Tirtarasa
Justifications for the Description Logics Knowledge Bases under the Fixed-Domain Semantics
In Christoph Benzmüller, Francesco Ricca, Xavier Parent, Dumitru Roman, eds., Rules and Reasoning - Second International Joint Conference, RuleML+RR2018, Luxembourg, September 18-21, 2018, Proceedings, volume 11092 of Lecture Notes in Computer Science, 185--200, September 2018. Springer
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Sarah Alice Gaggl, Sebastian Rudolph, Lukas Schweizer
Practical Fixed-Domain Reasoning for Description Logics - Extended Abstract
In Juan L. Reutter, Divesh Srivastava, eds., Proceedings of the 11th Alberto Mendelzon International Workshop on Foundations of Data Management and the Web, Montevideo, Uruguay, June 7-9, 2017, volume 1912 of CEUR Workshop Proceedings, June 2017. CEUR-WS.org
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Sarah Alice Gaggl, Sebastian Rudolph, Lukas Schweizer
Fixed-Domain Reasoning for Description Logics
In Gal A. Kaminka, Maria Fox, Paolo Bouquet, Eyke Hüllermeier, Virginia Dignum, Frank Dignum, Frank van Harmelen, eds., Proceedings of the 22nd European Conference on Artificial Intelligence (ECAI 2016), volume 285 of Frontiers in Artificial Intelligence and Applications, 819 - 827, September 2016. IOS Press
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Sarah Alice Gaggl, Norbert Manthey, Alessandro Ronca, Johannes Peter Wallner, Stefan Woltran
Improved Answer-Set Programming Encodings for Abstract Argumentation
To appear in Theory and Practice of Logic Programming (TPLP), Proceedings of ICLP 2015, August 2015. arXiv:1507.06689
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Wolfgang Dvořák, Sarah Alice Gaggl, Johannes Peter Wallner, Stefan Woltran
Making Use of Advances in Answer-Set Programming for Abstract Argumentation Systems
In Hans Tompits, Salvador Abreu, Johannes Oetsch, Jörg Pührer, Dietmar Seipel, Masanobu Umeda, Armin Wolf, eds., 19th International Conference, INAP 2011, and 25th Workshop on Logic Programming, WLP 2011, Vienna, Austria, September 28-30, 2011, Revised Selected Papers, volume 7773 of Lecture Notes in Computer Science, 114-133, 2013. Springer
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Markus Krötzsch, Despoina Magka, Ian Horrocks
Concrete Results on Abstract Rules
Proc. 12th International Conference on Logic Programming and Nonmonotonic Reasoning (LPNMR'13), 414-426, September 2013. Springer
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Despoina Magka, Markus Krötzsch, Ian Horrocks
Computing Stable Models for Nonmonotonic Existential Rules
Proc. 23rd International Joint Conference on Artificial Intelligence (IJCAI'13), 1031-1038, August 2013. AAAI Press
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Despoina Magka, Markus Krötzsch, Ian Horrocks
Nonmonotonic Existential Rules for Non-Tree-Shaped Ontological Modelling
Proc. 26th International Workshop on Description Logics (DL'13), 390-402, July 2013. CEUR Workshop Proceedings
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Sarah Alice Gaggl, Stefan Woltran
cf2 Semantics Revisited
In Pietro Baroni, Federico Cerutti, Massimiliano Giacomin, Guillermo Ricardo Simari, eds., Proceedings of the Third International Conference on Computational Models of Argument (COMMA 2010), volume 216 of Frontiers in Artificial Intelligence and Applications, 243-254, September 2010. IOS Press
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Sarah Alice Gaggl
Towards a General Argumentation System based on Answer-Set Programming
In Manuel V. Hermenegildo, Torsten Schaub, eds., Technical Communications of the 26th International Conference on Logic Programming (ICLP 2010), volume 7 of LIPIcs, 265-269, July 2010. Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik
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Uwe Egly, Sarah Alice Gaggl, Stefan Woltran
ASPARTIX: Implementing Argumentation Frameworks Using Answer-Set Programming
In Maria Garcia de la Banda, Enrico Pontelli, eds., Proceedings of the 24th International Conference on Logic Programming, (ICLP 2008), volume 5366 of Lecture Notes in Computer Science, 734-738, 2008. Springer
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Pascal Hitzler, Markus Krötzsch
Querying formal contexts with answer set programs
In Henrik Schärfe, Pascal Hitzler, Peter Ohrstrom, eds., Conceptual Structures: Inspiration and Application, Proceedings of the 14th International Conference on Conceptual Structures, ICCS 2006, Aalborg, Denmark, July 2006, volume 4068 of Lecture Notes in Artificial Intelligence, 413-426, July 2006. Springer
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Book Chapters

Federico Cerutti, Sarah Alice Gaggl, Matthias Thimm, Johannes Peter Wallner
Foundations of Implementations for Formal Argumentation
In Pietro Baroni; Dov Gabbay; Massimiliano Giacomin; Leendert van der Torre, eds., Handbook on Formal Argumentation, chapter Foundations of implementations for formal argumentation, 688-767. College Publications, February 2018
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Wolfgang Dvořák, Sarah Alice Gaggl, Thomas Linsbichler, Johannes Peter Wallner
Reduction-Based Approaches to Implement Modgil’s Extended Argumentation Frameworks
In Eiter, Thomas and Strass, Hannes and Truszczyński, Mirosław and Woltran, Stefan, eds., Advances in Knowledge Representation, Logic Programming, and Abstract Argumentation - Essays Dedicated to Gerhard Brewka on the Occasion of His 60th Birthday, volume 9060 of Lecture Notes in Computer Science, chapter Abstract Argumentation, 249-264. Springer International Publishing, 2015
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Edited Proceedings

Enrico Pontelli, Stefania Costantini, Carmine Dodaro, Sarah Alice Gaggl, Roberta Calegari, Artur D'Avila Garcez, Francesco Fabiano, Alessandra Russo, Francesca Toni
Proceedings 39th International Conference on Logic Programming
Volume 385, September 2023. Open Publishing Association
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Markus Krötzsch, Daria Stepanova
Explainable Artificial Intelligence. Proceedings of the 15th Reasoning Web Summer School
Volume 11810 of LNCS, 2019. Springer
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Sarah Alice Gaggl, Juan Carlos Nieves, Hannes Straß
Proceedings of the First International Workshop on Argumentation in Logic Programming and Non-Monotonic Reasoning (Arg-LPNMR 2016)
Volume abs/1611.02439, November 2016. CoRR
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Steffen Hölldobler, Markus Krötzsch, Rafael Peñaloza Nyssen, Sebastian Rudolph
KI 2015: Advances in Artificial Intelligence - Proceedings of the 38th Annual German Conference on AI
Volume 9324 of LNAI, 2015. Springer
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Doctoral Theses

Sarah Alice Gaggl
A Comprehensive Analysis of the cf2 Argumentation Semantics: From Characterization to Implementation
Phd thesis, TU Wien, 2013/03/04
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Technical Reports

Elisa Böhl, Stefan Ellmauthaler, Sarah Alice Gaggl
Winning Snake: Design Choices in Multi-Shot ASP
Technical Report, arXiv.org, volume arXiv:2408.08150, August 2024. to appear in Theory and Practice of Logic Programming (TPLP), Proceedings of ICLP 2024
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Johannes Klaus Fichte, Sarah Alice Gaggl, Markus Hecher, Dominik Rusovac
IASCAR: Incremental Answer Set Counting by Anytime Refinement
Technical Report, arXiv.org, volume arXiv:2311.07233, November 2023. Under consideration in Theory and Practice of Logic Programming (TPLP)
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Johannes Klaus Fichte, Sarah Alice Gaggl, Dominik Rusovac
Rushing and Strolling among Answer Sets - Navigation Made Easy
Technical Report, arXiv.org, volume CoRR abs/2112.07596, December 2021
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Sarah Alice Gaggl, Thomas Linsbichler, Marco Maratea, Stefan Woltran
Design and Results of the Second International Competition on Computational Models of Argumentation
Technical Report, arXiv.org, volume CoRR abs/1909.00621, September 2019
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Wolfgang Dvořák, Sarah Alice Gaggl, Johannes Peter Wallner, Stefan Woltran
Making Use of Advances in Answer-Set Programming for Abstract Argumentation System
Technical Report, arXiv.org, volume abs/1108.4942, 2011. Paper appears in the Proceedings of the 19th International Conference on Applications of Declarative Programming and Knowledge Management (INAP 2011)
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Uwe Egly, Sarah Alice Gaggl, Stefan Woltran
Answer-Set Programming Encodings for Argumentation Frameworks
Technical Report, Technische Universität Wien, volume DBAI-TR-2008-62, 2008
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Talks and Miscellaneous

Sarah Alice Gaggl
Navigating ASP Solution Spaces
Invited Talk at the 22nd International Workshop on Nonmonotonic Reasoning (NMR 2024), November 2024
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Johannes Klaus Fichte, Sarah Alice Gaggl, Dominik Rusovac
Rushing and Strolling among Answer Sets - Navigation Made Easy (Extended Abstract)
KR Recently Published Research Track (KR 2022), August 2022
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Sarah Alice Gaggl
Scalable Understanding: Navigation Approaches for Answer Sets
Invited talk at the Artificial Intelligence Group (AIG) at the FernUnversität in Hagen, October 2022
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Dominik Rusovac
Answer Set Navigation: Probleme Besser Verstehen
Invited talk at Security Networks AG Dresden (remotely held), May 2022
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Dominik Rusovac
Rushing and Strolling among Answer Sets - Navigation Made Easy
International Workshop on Counting and Sampling in Haifa, Israel at FLoC 2022, August 2022
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Sarah Alice Gaggl, Norbert Manthey
ASPARTIX-D Ready for the Competition
Presentation at Argumentation Spring Meeting 2015, Leipzig, April 2015
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Uwe Egly, Sarah Alice Gaggl, Paul Wandl, Stefan Woltran
ASPARTIX Conquers the Web
Software demonstration at the 3rd International Conference on Computational Models of Argument (COMMA 2010), 2010
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Sarah Alice Gaggl
ASPARTIX: A System for Computing Different Argumentation Semantics in Answer-Set Programming
Poster at Advanced Course on Artificial Intelligence Summer School (ACAI 2009), 2009
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