Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:58 2013 Optimize a model with 4280 rows, 8040 columns and 24020 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.18s Presolved: 4220 rows, 8000 columns, 19960 nonzeros Variable types: 6020 continuous, 1980 integer (1980 binary) Root relaxation: objective 4.370285e+04, 2024 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43702.8549 0 2 - 43702.8549 - - 0s 0 0 43728.0896 0 1 - 43728.0896 - - 0s 0 0 43728.0896 0 1 - 43728.0896 - - 0s 0 0 43728.0896 0 1 - 43728.0896 - - 0s 0 2 43728.5787 0 1 - 43728.5787 - - 0s H 203 170 44061.907536 43852.1529 0.48% 8.0 2s H 203 170 44061.777032 43852.1529 0.48% 8.0 2s H 213 140 44052.801317 43852.1529 0.46% 8.2 2s H 311 126 44040.345983 43861.0547 0.41% 8.2 3s * 469 52 13 43900.865943 43878.3893 0.05% 9.1 3s Cutting planes: Gomory: 2 Flow cover: 6 Explored 589 nodes (7297 simplex iterations) in 3.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390086594259e+04, best bound 4.389651922064e+04, gap 0.0099%