Submitter Variables Constraints Density Status Group Objective MPS File
J. Goessens, S. v. Hoessel, L. Kroon 14101 1761 1.17175e-02 easy sp9 660705645.759 sp97ar.mps.gz

Railway line planning instance. Solved with Gurobi 4.5.1 on a 12-core Linux system in 2678.77 sec.

Imported from MIPLIB2010.

Instance Statistics

Detailed explanation of the following tables can be found here.

Size Related Properties
Original Presolved
Variables 14101 14101
Constraints 1761 1739
Binaries 14101 14101
Integers 0 0
Continuous 0 0
Implicit Integers 0 0
Fixed Variables 0 0
Nonzero Density 0.0117175 0.0118648
Nonzeroes 290968 290945
Constraint Classification Properties
Original Presolved
Total 1761 1739
Empty 0 0
Free 0 0
Singleton 22 0
Aggregations 0 0
Precedence 0 0
Variable Bound 52 52
Set Partitioning 0 0
Set Packing 1140 1140
Set Covering 129 130
Cardinality 0 0
Invariant Knapsack 0 0
Equation Knapsack 0 0
Bin Packing 0 0
Knapsack 0 0
Integer Knapsack 0 0
Mixed Binary 418 417
General Linear 0 0
Indicator 0 0

Structure

Available nonzero structure and decomposition information. Further information can be found here.

value min median mean max
Components 3.075912
Constraint % 0.0575043 0.0576010 0.0575043 0.172513
Variable % 0.0141834 0.0839025 0.0921920 0.141834
Score 0.684877

Best Known Solution(s)

Find solutions below. Download the archive containing all solutions from the Download page.

ID Objective Exact Int. Viol Cons. Viol Obj. Viol Submitter Date Description
1 660705646 660705646 0 0 1e-07 - 2018-10-12 Solution found during MIPLIB2017 problem selection.

Similar instances in collection

The following instances are most similar to sp97ar in the collection. This similarity analysis is based on 100 scaled instance features describing properties of the variables, objective function, bounds, constraints, and right hand sides.

Instance Variables Binaries Integers Continuous Constraints Nonz. Submitter Group Status Objective
sp98ar 15085 15085 0 0 1435 426148 J. Goessens, S. v. Hoessel, L. Kroon sp9 easy 529740623
sp98ic 10894 10894 0 0 825 316317 J. Goessens, S. v. Hoessel, L. Kroon sp9 easy 449144758
sp97ic 12497 12497 0 0 1033 316629 J. Goessens, S. v. Hoessel, L. Kroon sp9 easy 427684488
neos-1516309 4500 4500 0 0 489 30400 NEOS Server Submission neos-pseudoapplication-26 easy 35954
n3div36 22120 22120 0 0 4484 340740 R. Meirich nseq easy 130800

Reference

@article{FischettiLodi2003,
 author = {Fischetti, Matteo and Lodi, Andrea},
 issn = {0025-5610},
 issue = {1},
 journal = {Mathematical Programming},
 keyword = {Mathematics and Statistics},
 pages = {23-47},
 publisher = {Springer},
 title = {Local branching},
 volume = {98},
 year = {2003}
}

@article{GoossensHoeselKroon2004,
 author = {J.-W. Goossens and S. van Hoesel and L. G. Kroon},
 journal = {Transportation Science},
 language = {English},
 number = {3},
 pages = {379--393},
 title = {A Branch-and-Cut Approach for Solving Railway Line-Planning Problems},
 volume = {38},
 year = {2004}
}

Last Update Nov 09, 2018 by Gregor Hendel
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