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 › 2022

kissat_pre

Zhihan Chen, Xindi Zhang, Shaowei Cai, Pinyan Lu · version 1.0.3
solverKissatv1.0.3main1st · no-limits track 20222nd · main track 2022
licenceMIT
can doSATgzip input
statusRuns, checks failedunstableNot on Docker Hub yet

Awards

Status

exits with code 1 instead of 20 when the formula is refuted by its preprocessing (the s UNSATISFIABLE line is correct); search results use the standard codes

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 licence file kissat_pre/sources/LICENSE; this summary is informative, the licence text prevails. Corrections welcome by pull request.

Build it and run it

pip install satex && satex build kissat-pre:2022
docker run --rm -v $PWD:/data satex/kissat-pre:2022 instance.cnf proof.out

This image is not on Docker Hub yet (checked 2026-09-25): the images are pushed in batches, and some entries cannot be built. Until then, satex build makes it on your machine from the archived sources and the recipe below, and the run command is the same. Mount the directory that holds your instance on /data; the proof file is optional. Its full provenance is kept: the archived sources, the pinned build environment and the recipe are all listed below, and satex build kissat-pre:2022 rebuilds the same image on your own machine if you would rather not trust ours (slower, same solver).

Download the sources kissat_pre.zip, the competition submission as archived by SAT Heritage, to build it yourself with the recipe below. Downloaded 10 times.

Licence
MIT (licence file kissat_pre/sources/LICENSE)
Image
satex/kissat-pre:2022
Command
./kissat --default FILECNF
Compressed input
read natively
Competition
SAT Competition 2022

How it is built

Recipe
configure and make
Builder
generic/starexec-v2
Environment
debian:bullseye-20220711-slim@sha256:f576b8067b77ff85c70725c976b7b6cde960898e2f19b9abab3fb148407614e2 · APT snapshot 20220711T000000Z
Sources
kissat_pre.zip

Last verification

Run on 2026-09-17.

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-proof-run-resultfailexpected return code 20 (or wrapper code 0), got 1
unsat-proof-run-terminationok1
unsat-resultfailexpected return code 20 (or wrapper code 0), got 1
unsat-terminationok1