[Bug-glpk] GLPK reports wrong solution for MIP

[Stefan Vigerske]

Hi,

for the attached model, GLPK 4.21 gives me a wrong solution.
CPLEX and CBC report 218.512850, but GLPK gives 197.55, and it's a 
minimization problem.
Fixing the variables to the reported integer solution and running GLPK 
on the resulting LP reports an infeasible problem (what is correct).

Maybe its a similar problem as reported last weak on the bug-glpk list, 
since the model is actually very bad scaled.

Best,
Stefan

-- 
Stefan Vigerske
Humboldt University Berlin, Numerical Mathematics
http://www.math.hu-berlin.de/~stefan

glpk_problem.mps
Description: Text document