SAT solvers from the first competitions to Knuth's programs, each as a Docker image with a binary ready to run, the most thorough traceability we can offer (original sources, dated build environment, recipe and verification), and reproducible in a few clicks on your own machine.

A collective site, still being completed: please check, correct and contribute. Everything on these pages is generated from the data of the sat-heritage/docker-images repository as it stands today: which solvers build, which answer correctly, who wrote them, under which licence, with which awards. Much of it was assembled recently, year by year, partly with the help of an AI assistant, and is still being verified. Treat every claim as provisional and check it against the original competition material before relying on it. We strongly encourage pull requests and verification reports: a corrected author line, a licence, a working recipe, a missing solver, or the outcome of running an image on your own machine are all welcome as pull requests or issues. The goal is a site maintained by the SAT community as a whole. Images not on Docker Hub yet can be built locally with satex build <solver>:<year> (pip install satex).
Catalogue › SAT Challenge 2012

clasp

Benjamin Kaufmann, Torsten Schaub, Marius Schneider · version 2.1.3
solverotherv2.1.3hard-combinatorialparallel
licenceMIT
can doSATUNSATparallel
statusVerifiedbuildsReady on Docker Hub 370 pulls of satex/clasp, all tags

Notes

The 2.1 series the challenge ran, from the source release published on SourceForge. It prints the competition lines but exits 30, a code of its answer-set heritage, so a launcher returns 10 or 20 instead.

Licence

permissive You can use it, modify it and ship it in your own software, commercial or not, as long as you keep the copyright notices.

Read from COPYING file of the archive; this summary is informative, the licence text prevails. Corrections welcome by pull request.

Pull it from Docker and run it

docker pull satex/clasp:2012
docker run --rm -v $PWD:/data satex/clasp:2012 instance.cnf

No build needed: the image is published on Docker Hub (checked 2026-11-13). Mount the directory that holds your instance on /data; the proof file is optional and not produced by this solver. Its full provenance is kept: the archived sources, the pinned build environment and the recipe are all listed below, and satex build clasp:2012 rebuilds the same image on your own machine if you would rather not trust ours (slower, same solver).

Download the sources clasp-2.1.3-source.tar.gz, the competition submission as archived by SAT Heritage, to build it yourself with the recipe below. Downloaded 12 times.

Licence
MIT (COPYING file of the archive)
Image
satex/clasp:2012
Command
./run-clasp.sh FILECNF
Compressed input
decompressed by the image
Event
SAT Challenge 2012

How it is built

Recipe
builder generic/v1
Builder
generic/v1
Environment
debian/eol:squeeze
Sources
clasp-2.1.3-source.tar.gz

Last verification

Run on 2026-10-25.

Build

build-environmentok
builder-base-imageok
compileok
docker-engineok
image-assembleok
runtime-baseok
runtime-base-imageok
runtime-dependenciesok
source-downloadok
source-extractok

Tests

launchok
sat-gzip-modelok
sat-gzip-resultokSAT
sat-gzip-terminationokSAT
sat-modelok
sat-resultokSAT
sat-terminationokSAT
unsat-proofskipunsupported
unsat-resultokUNSAT
unsat-terminationokUNSAT