This page reports on all changes to the instance data and web page since the release of MIPLIB 2017.

2019

January

Solu File Version 4

  • cvs16r128-89 moved from hard to easy because it can be solved with default GCG/SoPlex in about 2000 sec.
  • neos-3214367-sovi moved from open to hard because it was reported solved after 21 days with four restarted runs of ParaXpress.
  • neos-3631363-vilnia moved from open to hard because it was reported infeasible by ParaSCIP in 4632 sec, confirmed by ParaXpress.
  • neos-3211096-shag moved from open to hard because it was reported infeasible by ParaSCIP in 42484 sec and confirmed using ParaXpress.

  • first feasible solution reported for kottenpark09

  • improved incumbent solutions for ramos3 from 220 to 195.

Instance Updates

2018

November

Solu File Version 3

Solu File Version 2

Scripts

  • version 1.0.1 of the test scripts that fix a conversion issue between CPLEX XML SOL format and the Solution checker format

Bibliography and Other Data

  • add bibliography for academictimetablebig and academictimetablesmall
  • update bibliography of submissions by Sascha Kurz and Daniel Heinlein.
  • update descriptions of instances in the group ‘genus’.
  • add model data for the instance group ‘seqsolve’.
  • update bibliography for the group ‘8div’.
  • show objective as ‘INFEASIBLE’/‘UNBOUNDED’ also on single instance pages.

Last Update Jan 29, 2019 by Gregor Hendel
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