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[Florian Frohn <florian.frohn AT cs.rwth-aachen.de>]

12th Workshop on Horn Clauses for Verification and Synthesis (HCVS)
Call for Papers
22 July 2025, Zagreb, Croatia
Co-located with CAV 2025

https://www.sci.unich.it/hcvs25/

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* Important Dates *

Paper submission deadline: 16 May 2025
Paper notification: mid June 2025
Workshop: 22 July 2025

* Scope *

Many Program Verification and Synthesis problems of interest can be 
modeled directly using Horn clauses and many recent advances in the CLP 
and CAV communities have centered around efficiently solving problems 
presented as Horn clauses.

This series of workshops aims to bring together researchers working in 
the 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.

Horn clauses for verification and synthesis have been advocated by these 
communities in different times and from different perspectives and HCVS 
is organized to stimulate interaction and a fruitful exchange and 
integration of experiences.

Topics of interest include, but are not limited to the use of Horn 
clauses, constraints, and related formalisms in the following areas:

- 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)
- Program synthesis
- Program testing
- Program transformation
- Constraint solving
- Type systems
- Machine learning and automated reasoning
- CHC encoding of analysis and verification problems
- Resource analysis
- Case studies and tools
- Challenging problems

* Submission Guidelines *

We solicit regular papers describing 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, extended abstracts of doctoral 
theses, and overviews of research projects that are of interest to the 
workshop. At least one author of each accepted paper will be required to 
attend the workshop to present the contribution.

Submission has to be done in one of the following formats:

- Extended abstracts (up to 3 pages in EPTCS format), which describe 
work in progress or aim to initiate discussions.
- 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.
- Regular papers (up to 12 pages plus bibliography in EPTCS 
(http://www.eptcs.org/) format), which should present previously 
unpublished work (completed or in progress), including descriptions of 
research, tools, and applications.
- 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.

All submitted papers will be refereed by the program committee and will 
be selected for inclusion in accordance with the referee reports. If 
enough regular papers are accepted, both regular papers and extended 
abstracts will be published electronically. The publication of a paper 
is not intended to preclude later publication. Full versions of extended 
abstracts, or substantial revisions, may later be published elsewhere.

* Committees *

Program Chairs:

Emanuele De Angelis, IASI-CNR, Rome, Italy
Florian Frohn, RWTH Aachen University, Aachen, Germany

Program Committee:

TBA

* CHC Competition *

HCVS 2025 is planning to host the 8th competition on constraint Horn 
clauses (CHC-COMP https://chc-comp.github.io/), which will compare 
state-of-the-art tools for CHC solving for performance and effectiveness 
on a set of publicly available benchmarks.