The ACL2 Workshop Series

We hold regular workshops. In 2010, the ACL2 Workshop did a one-time merger with TPHOLs to form the first International Conference on Interactive Theorem Proving (ITP). Such a merger may occur again, but whether or not that happens, the ACL2 community is encouraged to participate in ITP. Other conferences of particular interest to the ACL2 community include CAV (Computer Aided Verification) and FMCAD (Formal Methods in Computer Aided Design).

ACL2 Workshop 2025: May 12-13, 2025, Austin, Texas, USA and also online.
ACL2 Workshop 2023: November 13-14, 2023, Austin, Texas, USA and also online.
ACL2 Workshop 2022: May 26-27, 2022, Austin, Texas, USA and also online.
ACL2 Workshop 2020: May 28-29, 2020 (held online via video streaming).
ACL2 Workshop 2018: November 5-6, 2018, Austin, Texas, USA.
ACL2 Workshop 2017: May 22 - 23, 2017, Austin, Texas, USA.
ACL2 Workshop 2015: October 1-2, 2015, Austin, Texas, USA. (Co-located with FMCAD 2015.)
ACL2 Workshop 2014: July 12-13, 2014, Vienna, Austria, as an ITP-affiliated workshop of FLoC (part of the Vienna Summer of Logic).
- Slides
- Proceedings
ACL2 Workshop 2013: May 30-31, 2013, University of Wyoming, Laramie, Wyoming, USA.
- Proceedings
ACL2 Workshop 2011: November 3-4, 2011, Austin, Texas, USA. (Co-located with FMCAD 2011.)
- Proceedings
ITP 2010: Int'l Conference on Interactive Theorem Proving (ITP) 2010: July 11-14, 2010, Edinburgh, Scotland; part of FLoC 2010.
ACL2 Workshop 2009: May 11-12, 2009, Boston, Massachusetts, USA. (Proceedings available from ACM Digital Library.)
ACL2 Workshop 2007: November 15-16, 2007, Austin, Texas, USA.
ACL2 Workshop 2006: August 15-16, 2006, Seattle, Washington, USA. (Proceedings available from ACM Digital Library.)
ACL2 Workshop 2004: November 18-19, 2004, Austin, Texas, USA.
ACL2 Workshop 2003: July 13-14, 2003, Boulder, Colorado, USA.
ACL2 Workshop 2002: April 8-9, 2002, Grenoble, France.
ACL2 Workshop 2000: October 30-31, 2000, Austin, Texas, USA.
ACL2 Workshop 1999: March 29-31, 1999, Austin, Texas, USA.

Here is a list of past ACL2 Workshop slogans.

1999: It ain't over til the last Q.E.D.
2000: Just prove it.
2002: Accumulated Persistence
2003: No software too trivial. No error too obscure.
2004: Defun starts here
2006: ACM Software Systems Award Winner!
2007: Save the world. Use make-event.
2009: None
2011: We aim to prove
2013: Pain is temporary; theorems are forever.
2014: I love the smell of parentheses in the morning.
2015: 25 years of rewriting history
2017: In Proof We Trust
2018: Sometimes you feel like alist, sometimes you don't
2020: (defaxiom acl2-2020 "Damn nil. Full speed ahead!" (not (lexorder 'acl2 'covid-19)))
2022: supporting (in-theory ...) local events
2023: Certifiable

Jared Davis and Keshav Kini have graciously supplied a listing of bibtex entries for the ACL2 workshops through 2017 (would be nice if extended past 2017; any volunteers?).

ACL2 input files (certifiable books) from the preceding workshops are available in the ACL2+Books GitHub repository, specifically, in its subdirectory for workshop contributions.

ACL2 Seminar at UT

An ACL2 seminar has met regularly at the University of Texas. A list of past talks, generally accompanied by abstracts and sometimes slides, may be found on the UT ACL2 seminar page.

ACL2 Course Materials

See this course-materials documentation topic.