Gurobi 5.0.1 (linux64) logging started Wed Apr 24 06:17:16 2013 Optimize a model with 83811 rows, 82901 columns and 331331 nonzeros Presolve removed 3630 rows and 0 columns Presolve time: 0.60s Presolved: 80181 rows, 82901 columns, 324071 nonzeros Variable types: 82810 continuous, 91 integer (91 binary) Root relaxation: objective 1.224129e+05, 19000 iterations, 4.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 122412.920 0 4 - 122412.920 - - 5s H 0 0 130960.00000 122412.920 6.53% - 5s H 0 0 130026.00000 122412.920 5.86% - 5s H 0 0 125773.00000 122412.920 2.67% - 6s 0 0 122418.873 0 6 125773.000 122418.873 2.67% - 6s 0 0 122418.904 0 7 125773.000 122418.904 2.67% - 7s 0 0 122418.905 0 6 125773.000 122418.905 2.67% - 8s H 0 0 125672.08411 122418.905 2.59% - 11s 0 2 122419.064 0 6 125672.084 122419.064 2.59% - 12s H 4 4 123594.41379 122648.406 0.77% 525 14s H 6 6 123339.60923 122648.406 0.56% 457 15s * 9 9 7 122818.00000 122648.406 0.14% 339 15s Cutting planes: Gomory: 3 Flow cover: 5 Explored 25 nodes (23101 simplex iterations) in 16.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.228180000000e+05, best bound 1.228180000000e+05, gap 0.0%