Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:30:25 2013 Optimize a model with 2400 rows, 102800 columns and 215900 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.19s Presolved: 2300 rows, 102700 columns, 213800 nonzeros Variable types: 102200 continuous, 500 integer (500 binary) Root relaxation: objective 8.654105e+05, 6649 iterations, 0.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 6 - 865410.545 - - 0s H 0 0 983809.60150 865410.545 12.0% - 0s 0 0 865463.393 0 6 983809.601 865463.393 12.0% - 1s 0 0 865500.300 0 6 983809.601 865500.300 12.0% - 1s 0 0 865511.212 0 6 983809.601 865511.212 12.0% - 1s 0 0 865517.443 0 6 983809.601 865517.443 12.0% - 1s 0 0 865522.625 0 8 983809.601 865522.625 12.0% - 1s 0 0 865529.032 0 8 983809.601 865529.032 12.0% - 2s 0 0 865530.480 0 6 983809.601 865530.480 12.0% - 2s 0 0 865531.684 0 8 983809.601 865531.684 12.0% - 2s 0 0 865531.684 0 8 983809.601 865531.684 12.0% - 2s 0 0 865531.684 0 8 983809.601 865531.684 12.0% - 3s 0 0 865531.684 0 8 983809.601 865531.684 12.0% - 3s 0 0 865531.684 0 8 983809.601 865531.684 12.0% - 4s 0 2 865554.928 0 8 983809.601 865554.928 12.0% - 4s 2 4 866544.413 2 9 983809.601 866230.849 12.0% 413 5s H 27 15 867964.64616 866307.477 0.19% 106 10s H 108 18 867071.83940 866550.441 0.06% 43.0 14s 110 20 867003.171 70 1 867071.839 866550.441 0.06% 42.3 15s H 142 3 866919.96195 866770.650 0.02% 38.1 16s Cutting planes: Flow cover: 18 Explored 145 nodes (14222 simplex iterations) in 16.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.669199619480e+05, best bound 8.668392381912e+05, gap 0.0093%