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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 › 2018

Riss7.1

Norbert Manthey
solverothermain
licenceLGPL-2.1
can doSATUNSATgzip input
statusRuns, checks failedunstableReady on Docker Hub 316 pulls of satex/riss7.1, all tags

Status

Builds and answers correctly; the DRAT proof it writes for the UNSAT test instance fails verification by satex's checker at step 5 (a step that is neither RUP nor RAT), so the proof is not certified here.

Licence

weak copyleft You can use it in your own software, but changes to the solver itself must be published under the same licence.

Read from licence file Riss7.1/riss7/LICENSE; this summary is informative, the licence text prevails. Corrections welcome by pull request.

Pull it from Docker and run it

docker pull satex/riss7.1:2018
docker run --rm -v $PWD:/data satex/riss7.1:2018 instance.cnf proof.out

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. Its full provenance is kept: the archived sources, the pinned build environment and the recipe are all listed below, and satex build riss7.1:2018 rebuilds the same image on your own machine if you would rather not trust ours (slower, same solver).

Download the sources Riss7.1.zip, the competition submission as archived by SAT Heritage, to build it yourself with the recipe below. The Zenodo record holding the archives of this year was downloaded 2 113 times (Zenodo counts per record, not per file).

Licence
LGPL-2.1 (licence file Riss7.1/riss7/LICENSE)
Image
satex/riss7.1:2018
Command
./riss FILECNF
Compressed input
read natively

How it is built

Recipe
builder generic/v1
Builder
generic/v1
Environment
debian:9.5-slim
Sources
Riss7.1.zip

Last verification

Run on 2026-09-16.

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-prooffailproof step 5 is neither RUP nor RAT
unsat-proof-run-resultokUNSAT
unsat-proof-run-terminationokUNSAT
unsat-resultokUNSAT
unsat-terminationokUNSAT