Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:11:52 2012 Optimize a model with 3000 rows, 2970 columns and 11328 nonzeros Presolve removed 202 rows and 27 columns Presolve time: 0.02s Presolved: 2798 rows, 2943 columns, 10906 nonzeros Variable types: 2769 continuous, 174 integer (174 binary) Root relaxation: objective 6.308998e+04, 284 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63089.9843 0 11 - 63089.9843 - - 0s H 0 0 65034.000000 63089.9843 2.99% - 0s 0 0 63143.7514 0 23 65034.0000 63143.7514 2.91% - 0s H 0 0 63574.000000 63143.7514 0.68% - 0s 0 0 63146.0586 0 23 63574.0000 63146.0586 0.67% - 0s 0 0 63153.8487 0 24 63574.0000 63153.8487 0.66% - 0s 0 0 63154.6082 0 26 63574.0000 63154.6082 0.66% - 0s 0 0 63155.0382 0 28 63574.0000 63155.0382 0.66% - 0s 0 0 63155.4656 0 30 63574.0000 63155.4656 0.66% - 0s 0 0 63156.1376 0 26 63574.0000 63156.1376 0.66% - 0s H 0 0 63363.000000 63156.1376 0.33% - 0s 0 0 63156.1376 0 10 63363.0000 63156.1376 0.33% - 0s 0 0 63156.1376 0 23 63363.0000 63156.1376 0.33% - 0s 0 0 63156.1376 0 21 63363.0000 63156.1376 0.33% - 0s 0 0 63156.1376 0 21 63363.0000 63156.1376 0.33% - 0s 0 0 63164.9912 0 20 63363.0000 63164.9912 0.31% - 0s 0 0 63165.9586 0 23 63363.0000 63165.9586 0.31% - 0s 0 0 63167.4838 0 23 63363.0000 63167.4838 0.31% - 0s 0 0 63168.0785 0 25 63363.0000 63168.0785 0.31% - 0s 0 0 63169.0963 0 23 63363.0000 63169.0963 0.31% - 0s 0 2 63169.5949 0 23 63363.0000 63169.5949 0.31% - 0s * 22 13 20 63361.000000 63182.5100 0.28% 2.5 0s * 39 18 17 63348.000000 63245.7424 0.16% 2.7 0s * 50 20 13 63333.000000 63246.2286 0.14% 2.6 0s Cutting planes: Gomory: 4 Flow cover: 15 Explored 97 nodes (892 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.333300000000e+04, best bound 6.333300000000e+04, gap 0.0%