ACL2 Version 4.0 News

Table of Contents

• ACL2 Books Repository
• Performance Comparisons
• ACL2 Course Materials

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 various cases below correspond to runs of the ACL2 regression suite (distributed and workshop books) for ACL2 executables built on different platforms, as indicated. In each case below, the first number, User time in seconds, is probably the best one to use for comparisons (as opposed to System time or Elapsed time), for especially the 64-bit runs, where there may have been other user processes on the machines. Not shown here are a Windows run using GCL 2.6.7. Also, we successfully ran the entire regression suite very shortly before final testing, using safety 3 (CCL).

Statistics shown below for Linux are for running make regression on 8-core machines. The option -j 8 was used (i.e., up to 8 parallel jobs) for these, so again, the first number in each case (marked with "u"), User seconds, is more relevant than the rest. Each Linux regression run was on a 2.2 GHz AMD Opteron (tm) Processor 850 running Ubuntu Linux. One such machine was used for the 32-bit OS runs; others for the 64-bit OS runs. Each Macintosh run used `make/ with option -j 2, on a 2.4GHz Intel Core 2 Duo with 4 GB of RAM. NOTE: The 64-bit and Macintosh runs skipped the directory books/clause-processors/SULFA/, which accounts for about 4 or 5 minutes of User time.

32-bit Linux runs

64-bit Linux runs

ACL2 Course Materials

• The following two interfaces to ACL2 support the teaching of ACL2 to undergraduates:
  • The ACL2 Sedan (ACL2s)
  • DrACuLa
• Here is a link to the web page for Yishai Feldman's Computer-Aided Reasoning course at The Interdisciplinary Center, Herzliya.
• John Cowles, COSC5010: Formalizing the JVM in ACL2, Univ. of Wyoming.
• Links to some of Warren Hunt's courses, many of which use ACL2, may be found here.
• Logic and Computation, a freshman class taught by Pete Manolios and Riccardo Pucella at Northeastern.
• Here are links to web pages for courses taught by Pete Manolios at Georgia Tech:
  • CS 8803 Computational Logic (Spring 2005)
  • CS 8001 Hardware Verification Fall 2004
  • CS 3220 Processor Design.
• Links to some of J Moore's courses, many of which use ACL2, may be found here.
• A course taught by Rex Page at the Univ. of Oklahoma, and related links.
• Eric Smith's web page for a class at Stanford