2017 XCSP3 competition: mini-solver track (sequential and parallel solvers): ranking of solvers

This page presents the ranking of the different solvers. Solvers are ranked on the number of solved instances. Ties are broken by considering the minimum total solution time.

Solvers which gave a wrong answer in a category are excluded from the ranking in that category.

The Virtual Best Solver (VBS) is a theoretical construction which returns the best answer provided by one of the submitted solver. It corresponds to the 'Best result' column in the bench per bench view of the results. It can be considered as a meta solver which uses a perfect oracle to guess instantaneously which of the submitted solver will be the most efficient to solve the instance. Another way to look at it is to consider this VBS as a solver which would run all other solvers in parallel, bringing together all the solvers strenghs. This VBS is essentially the same notion as State Of The Art (SOTA) solver defined in "Evaluating general purpose automated theorem proving systems", Artificial Intelligence, Volume 131, Issues 1-2, September 2001, Pages 39-54 Geoff Sutcliffe, Christian Suttner. However, SOTA is a more general notion: the VBS can be seen as the least powerful SOTA solver.

Category "optimization problem" (COP): OPT+UNSAT answers

Rank SolverVersion Number of
solved instances
Detail % of all instances% of VBSCumulated CPU time
on solved instances
Median CPU timeAverage CPU time
per solved instance
Cumulated WC time
on solved instances
Median WC timeAverage WC time
per solved instance
CPU/WC
Total number of instances in the category: 117
Virtual Best Solver (VBS)4343 OPT37%100%7379.221.09171.61----
1cosoco-mini1.124242 OPT36%98%6648.261.10158.296649.591.15158.321.00
2Naxos1.1.03333 OPT28%77%4439.776.47134.544439.926.47134.541.00

Category "optimization problem" (COP): OPT answers

Rank SolverVersion Number of
solved instances
% of all instances% of VBSCumulated CPU time
on solved instances
Median CPU timeAverage CPU time
per solved instance
Cumulated WC time
on solved instances
Median WC timeAverage WC time
per solved instance
CPU/WC
Total number of instances in the category: 117
Virtual Best Solver (VBS)4337%100%7379.221.09171.61----
1cosoco-mini1.124236%98%6648.261.10158.296649.591.15158.321.00
2Naxos1.1.03328%77%4439.776.47134.544439.926.47134.541.00

Category "optimization problem" (COP): UNSAT answers

Rank SolverVersion Number of
solved instances
% of all instances% of VBSCumulated CPU time
on solved instances
Median CPU timeAverage CPU time
per solved instance
Cumulated WC time
on solved instances
Median WC timeAverage WC time
per solved instance
CPU/WC
Total number of instances in the category: 117
Virtual Best Solver (VBS)00%-0.000.00-----
1Naxos1.1.000%-0.000.00-0.000.00--
2cosoco-mini1.1200%-0.000.00-0.000.00--

Category "decision problem" (CSP): SAT+UNSAT answers

Rank SolverVersion Number of
solved instances
Detail % of all instances% of VBSCumulated CPU time
on solved instances
Median CPU timeAverage CPU time
per solved instance
Cumulated WC time
on solved instances
Median WC timeAverage WC time
per solved instance
CPU/WC
Total number of instances in the category: 242
Virtual Best Solver (VBS)190122 SAT, 68 UNSAT79%100%12425.840.8165.40----
1cosoco-mini1.12181119 SAT, 62 UNSAT75%95%7689.530.6442.487692.970.6542.501.00
2miniBTD2017-08-10163105 SAT, 58 UNSAT67%86%8741.740.7653.638747.750.8453.671.00
3Naxos1.1.0143102 SAT, 41 UNSAT59%75%24780.004.06173.2924782.044.06173.301.00

Category "decision problem" (CSP): SAT answers

Rank SolverVersion Number of
solved instances
% of all instances% of VBSCumulated CPU time
on solved instances
Median CPU timeAverage CPU time
per solved instance
Cumulated WC time
on solved instances
Median WC timeAverage WC time
per solved instance
CPU/WC
Total number of instances in the category: 242
Virtual Best Solver (VBS)12250%100%7968.960.8165.32----
1cosoco-mini1.1211949%98%3313.840.3627.853316.100.3627.871.00
2miniBTD2017-08-1010543%86%5922.170.5656.405926.510.6156.441.00
3Naxos1.1.010242%84%15141.922.33148.4515143.012.33148.461.00

Category "decision problem" (CSP): UNSAT answers

Rank SolverVersion Number of
solved instances
% of all instances% of VBSCumulated CPU time
on solved instances
Median CPU timeAverage CPU time
per solved instance
Cumulated WC time
on solved instances
Median WC timeAverage WC time
per solved instance
CPU/WC
Total number of instances in the category: 242
Virtual Best Solver (VBS)6828%100%4456.880.7365.54----
1cosoco-mini1.126226%91%4375.692.4470.584376.872.4870.591.00
2miniBTD2017-08-105824%85%2819.570.8948.612821.250.9148.641.00
3Naxos1.1.04117%60%9638.086.35235.089639.036.35235.101.00