Certified Programs and Proofs (CPP) 2021: First Call for Papers

Andrei Popescu andrei.h.popescu at gmail.com
Thu Apr 16 10:44:58 EDT 2020

Certified Programs and Proofs (CPP) is an international conference on
practical and theoretical topics in all areas that consider formal
verification and certification as an essential paradigm for their work. CPP
spans areas of computer science, mathematics, logic, and education.

CPP 2021 (https://popl21.sigplan.org/home/CPP-2021) will be held on 18-19
January 2021 and will be co-located with POPL 2021. CPP 2021 is sponsored
by ACM SIGPLAN, in cooperation with ACM SIGLOG.


* Due to the COVID-19 situation, it is currently uncertain whether CPP 2021
will be a physical conference in Copenhagen, Denmark or a virtual one.

* The submission deadline is one month earlier than usual.


* Abstract Deadline: 16 September 2020 at 23:59 AoE (UTC-12h)

* Paper Submission Deadline: 22 September 2020 at 23:59 AoE (UTC-12h)

* Notification (tentative): 19 November 2020

* Camera Ready Deadline (tentative): 10 December 2020

* Conference: 18-19 January 2021

Deadlines expire at the end of the day, anywhere on earth. Abstract and
submission deadlines are strict and there will be no extensions.


We welcome submissions in research areas related to formal certification of
programs and proofs. The following is a non-exhaustive list of topics of
interest to CPP:

* certified or certifying programming, compilation, linking, OS kernels,
runtime systems, security monitors, and hardware;

* certified mathematical libraries and mathematical theorems;

* proof assistants (e.g, ACL2, Agda, Coq, Dafny, F*, HOL4, HOL Light,
Idris, Isabelle, Lean, Mizar, Nuprl, PVS, etc);

* new languages and tools for certified programming;

* program analysis, program verification, and program synthesis;

* program logics, type systems, and semantics for certified code;

* logics for certifying concurrent and distributed systems;

* mechanized metatheory, formalized programming language semantics, and
logical frameworks;

* higher-order logics, dependent type theory, proof theory, logical
systems, separation logics, and logics for security;

* verification of correctness and security properties;

* formally verified blockchains and smart contracts;

* certificates for decision procedures, including linear algebra,
polynomial systems, SAT, SMT, and unification in algebras of interest;

* certificates for semi-decision procedures, including equality,
first-order logic, and higher-order unification;

* certificates for program termination;

* formal models of computation;

* mechanized (un)decidability and computational complexity proofs;

* formally certified methods for induction and coinduction;

* integration of interactive and automated provers;

* logical foundations of proof assistants;

* applications of AI and machine learning to formal certification;

* user interfaces for proof assistants and theorem provers;

* teaching mathematics and computer science with proof assistants.


Prior to the paper submission deadline, the authors should upload their
anonymized paper in PDF format through the HotCRP system at


The submissions must be written in English and provide sufficient detail to
allow the program committee to assess the merits of the contribution. They
must be formatted following the ACM SIGPLAN Proceedings format using the
acmart style with the sigplan option, which provides a two-column style,
using 10 point font for the main text, and a header for double blind review
submission, i.e.,


The submitted papers should not exceed 12 pages, including tables and
figures, but excluding bibliography and clearly marked appendices. The
papers should be self-contained without the appendices. Shorter papers are
welcome and will be given equal consideration. Submissions not conforming
to the requirements concerning format and maximum length may be rejected
without further consideration.

CPP 2021 will employ a lightweight double-blind reviewing process. To
facilitate this, the submissions must adhere to two rules:

(1) author names and institutions must be omitted, and

(2) references to authors’ own related work should be in the third person
(e.g., not "We build on our previous work ..." but rather "We build on the
work of ...").

The purpose of this process is to help the PC and external reviewers come
to an initial judgment about the paper without bias, not to make it
impossible for them to discover the authors if they were to try. Nothing
should be done in the name of anonymity that weakens the submission or
makes the job of reviewing it more difficult. In particular, important
background references should not be omitted or anonymized. In addition,
authors are free to disseminate their ideas or draft versions of their
papers as usual. For example, authors may post drafts of their papers on
the web or give talks on their research ideas. POPL has answers to
frequently asked questions addressing many common concerns:

We encourage the authors to provide any supplementary material that is
required to support the claims made in the paper, such as proof scripts or
experimental data. This material must be uploaded at submission time, as an
archive, not via a URL. Two forms of supplementary material may be

(1) Anonymous supplementary material is made available to the reviewers
before they submit their first-draft reviews.

(2) Non-anonymous supplementary material is made available to the reviewers
after they have submitted their first-draft reviews and have learned the
identity of the authors.

Please use anonymous supplementary material whenever possible, so that it
can be taken into account from the beginning of the reviewing process.

The submitted papers must adhere to the SIGPLAN Republication Policy (
https://www.sigplan.org/Resources/Policies/Republication/) and the ACM
Policy on Plagiarism (https://www.acm.org/publications/policies/plagiarism).
Concurrent submissions to other conferences, journals, workshops with
proceedings, or similar forums of publication are not allowed. The PC
chairs should be informed of closely related work submitted to a conference
or journal in advance of submission. One author of each accepted paper is
expected to present it at the (possibly virtual) conference.


The CPP proceedings will be published by the ACM, and authors of accepted
papers will be required to choose one of the following publication options:

(1) Author retains copyright of the work and grants ACM a non-exclusive
permission-to-publish license and, optionally, licenses the work under a
Creative Commons license.

(2) Author retains copyright of the work and grants ACM an exclusive
permission-to-publish license.

(3) Author transfers copyright of the work to ACM.

For authors who can afford it, we recommend option (1), which will make the
paper Gold Open Access, and also encourage such authors to license their
work under the CC-BY license. ACM will charge you an article processing fee
for this option (currently, US$700), which you have to pay directly with
the ACM.

For everyone else, we recommend option (2), which is free and allows you to
achieve Green Open Access, by uploading a preprint of your paper to a
repository that guarantees permanent archival such as arXiv or HAL. This is
anyway a good idea for timely dissemination even if you chose option 1.
Ensuring timely dissemination is particularly important for this edition,
since, because of the very tight schedule, the official proceedings might
not be available in time for CPP.

The official CPP 2021 proceedings will also be available via SIGPLAN
OpenTOC (http://www.sigplan.org/OpenTOC/#cpp).

For ACM’s take on this, see their Copyright Policy (
http://www.acm.org/publications/policies/copyright-policy) and Author
Rights (http://authors.acm.org/main.html).


Cătălin Hriţcu, Inria Paris, France (co-chair)

Andrei Popescu, Middlesex University London, UK (co-chair)

Reynald Affeldt, National Institute of Advanced Industrial Science and
Technology (AIST), Japan

June Andronick, CSIRO's Data61 and UNSW, Australia

Arthur Azevedo de Amorim, Carnegie Mellon University, USA

Joachim Breitner, DFINITY Foundation, Germany

Jesper Cockx, TU Delft, Netherlands

Cyril Cohen, Université Côte d’Azur, Inria, France

Nils Anders Danielsson, University of Gothenburg / Chalmers University of
Technology, Sweden

Brijesh Dongol, University of Surrey, UK

Floris van Doorn, University of Pittsburgh, USA

Yannick Forster, Saarland University, Germany

Shilpi Goel, Centaur Technology, Inc., USA

Chung-Kil Hur, Seoul National University, South Korea

Moa Johansson, Chalmers University of Technology, Sweden

Ekaterina Komendantskaya, Heriot-Watt University, UK

Angeliki Koutsoukou-Argyraki, University of Cambridge, UK

Robert Y. Lewis, Vrije Universiteit Amsterdam, Netherlands

Hongjin Liang, Nanjing University, China

Andreas Lochbihler, Digital Asset GmbH, Switzerland

Petar Maksimović, Imperial College London, UK

William Mansky, University of Illinois at Chicago, USA

Anders Mörtberg, Stockholm University, Sweden

Sam Owre, SRI International, USA

Karl Palmskog, KTH Royal Institute of Technology, Sweden

Johannes Åman Pohjola, CSIRO's Data61 / University of New South Wales,

Damien Pous, CNRS, ENS Lyon, France

Tahina Ramananandro, Microsoft Research, USA

Ilya Sergey, Yale-NUS College and National University of Singapore,

Natarajan Shankar, SRI International, USA

Kathrin Stark, Princeton University, USA

René Thiemann, University of Innsbruck, Austria

Amin Timany, Aarhus University, Denmark

Josef Urban, Czech Technical University in Prague, Czech Republic

Christoph Weidenbach, MPI-INF, Germany

Freek Wiedijk, Radboud University Nijmegen, Netherlands

Yannick Zakowski, University of Pennsylvania, USA


For any questions please contact the two PC chairs:

Cătălin Hriţcu <catalin.hritcu at gmail.com>,

Andrei Popescu <andrei.h.popescu at gmail.com>
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