ACL2 Version 4.2 News

Table of Contents

ACL2 Books Repository

The acl2-books Google group allows you to contribute ACL2 books (input files), and also to update to the latest version if you don't want to wait for the next ACL2 release. Quoting from that web site:
This site is for community-driven development for the basic ACL2 libraries, which deal with topics like arithmetic, data structures, and hardware modelling. We're working with the authors of ACL2 and our changes are eventually incorporated into official ACL2 releases.

Performance Comparisons

The statistics below correspond to runs of make -j 8 regression using both distributed and workshop books, skipping directory books/clause-processors/SULFA/, for ACL2 executables built on Linux platforms as indicated. Not shown are results of testing on Windows and Mac OS X or of running a near-final version with safety 3 using CCL. Each regression was run on an 8-core 2.2 GHz AMD Opteron (tm) Processor 850 running Ubuntu Linux.

32-bit Linux runs using make -j 8

64-bit Linux runs using make -j 8

Note: We ran regression using CLISP 2.41 as well, but without the workshops/ books. The user time alone was 81,538 seconds, far exceeding each of the three user times below even though those include certification of the workshops/ books.

ACL2 Course Materials

At some point, perhaps "ACL2 Course Materials" may be a top-level link on the ACL2 home page. For now, we provide some links.