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 › 2011

clasp

Benjamin Kaufmann · version 2.0-R4092-crafted
solverotherv2.0-R4092-craftedcrafted1st UNSAT · crafted track 20112nd UNSAT · crafted track (wall-clock time) 2011
licenceGPL-2.0
can doSATUNSAT
statusVerifiedbuildsReady on Docker Hub 36 pulls of satex/clasp-2.0-r4092-crafted, all tags

Awards

Licence

copyleft (GPL) You can use and modify it freely, but a program you redistribute with this solver inside must be GPL too, with its sources.

Read from licence file clasp-2.0-R4092/COPYING; this summary is informative, the licence text prevails. Corrections welcome by pull request.

Pull it from Docker and run it

docker pull satex/clasp-2.0-r4092-crafted:2011
docker run --rm -v $PWD:/data satex/clasp-2.0-r4092-crafted:2011 instance.cnf

No build needed: the image is published on Docker Hub (checked 2026-09-25). 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-2.0-r4092-crafted:2011 rebuilds the same image on your own machine if you would rather not trust ours (slower, same solver).

Download the sources clasp-2.0-R4092.tar.gz, the competition submission as archived by SAT Heritage, to build it yourself with the recipe below. Downloaded 13 times.

Licence
GPL-2.0 (licence file clasp-2.0-R4092/COPYING)
Image
satex/clasp-2.0-r4092-crafted:2011
Command
./clasp --sat-p=20,25,120,-1,0 --berk-max=512 --berk-once --otfs=1 --recursive-str --dinit=800,10000 --dsched=20000,1.1 --reverse-arcs=2 FILECNF
Compressed input
decompressed by the image

How it is built

Recipe
builder generic/v1
Builder
generic/v1
Environment
debian/eol:squeeze
Sources
clasp-2.0-R4092.tar.gz

Last verification

Run on 2026-09-15.

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