[SCIP] based on scip results, how to debug an infeasible binary model ?
usa usa
usact2012 at gmail.com
Wed Apr 29 05:32:12 CEST 2020
Hi,
I am trying to solve an Integer programming model by running java scip from
IntelliJ Idea (community 2019.2) on macbook pro.
My java is 11.
My scipoptsuite: 6.0.2.
My jscip cheked out from https://github.com/SCIP-Interfaces/JSCIPOpt
My model is not feasible.
Could anyone please suggest how I can debug the model based on the output
from SCIP ?
Are there some analysis results that SCIP can provide except
printStatistics() ?
The model has many variables and constraints.
I am not sure how and where I should focus on in the model ?
For example, which constraints are violated?
Thanks,
This is the output from printStatistics():
---------------------------
SCIP Status : problem is solved [infeasible]
Total Time : 0.05
solving : 0.05
presolving : 0.03 (included in solving)
reading : 0.00
copying : 0.00 (0 times copied the problem)
Original Problem :
Problem name : Binary_Example
Variables : 2871 (2871 binary, 0 integer, 0 implicit integer, 0
continuous)
Constraints : 1509 initial, 1509 maximal
Objective : maximize, 2610 non-zeros (abs.min = 2.994, abs.max =
68928)
Presolved Problem :
Problem name : t_LinearExample_1
Variables : 302 (302 binary, 0 integer, 0 implicit integer, 0
continuous)
Constraints : 1543 initial, 1543 maximal
Objective : minimize, 90 non-zeros (abs.min = 2.994, abs.max =
62611.3)
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