Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:31:37 2013 Optimize a model with 1800 rows, 100700 columns and 201900 nonzeros Presolve removed 300 rows and 200 columns Presolve time: 0.51s Presolved: 1500 rows, 100500 columns, 201100 nonzeros Variable types: 100400 continuous, 100 integer (100 binary) Root relaxation: objective 8.654105e+05, 7474 iterations, 1.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 2 - 865410.545 - - 1s H 0 0 876482.34250 865410.545 1.26% - 2s 0 0 865464.446 0 2 876482.342 865464.446 1.26% - 2s 0 0 865503.712 0 2 876482.342 865503.712 1.25% - 3s 0 0 865511.884 0 2 876482.342 865511.884 1.25% - 3s 0 0 865524.980 0 2 876482.342 865524.980 1.25% - 4s 0 0 865527.012 0 2 876482.342 865527.012 1.25% - 4s 0 0 865527.410 0 2 876482.342 865527.410 1.25% - 5s 0 0 865531.560 0 1 876482.342 865531.560 1.25% - 5s 0 0 865534.335 0 1 876482.342 865534.335 1.25% - 6s 0 0 865534.335 0 1 876482.342 865534.335 1.25% - 6s 0 0 865534.490 0 1 876482.342 865534.490 1.25% - 7s 0 0 865535.415 0 1 876482.342 865535.415 1.25% - 8s 0 0 865535.724 0 1 876482.342 865535.724 1.25% - 8s 0 0 865535.930 0 1 876482.342 865535.930 1.25% - 8s 0 0 865536.035 0 1 876482.342 865536.035 1.25% - 9s 0 0 865536.123 0 1 876482.342 865536.123 1.25% - 9s 0 0 865536.268 0 1 876482.342 865536.268 1.25% - 9s 0 0 865536.317 0 1 876482.342 865536.317 1.25% - 10s 0 0 865536.317 0 1 876482.342 865536.317 1.25% - 10s 0 2 865558.512 0 1 876482.342 865558.512 1.25% - 11s 11 13 867106.907 8 1 876482.342 866564.739 1.13% 258 15s * 18 12 13 867635.64956 866564.739 0.12% 177 15s * 43 9 12 866731.75201 866619.058 0.01% 116 18s Cutting planes: Flow cover: 22 Explored 50 nodes (14455 simplex iterations) in 18.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.667317520100e+05, best bound 8.666737562709e+05, gap 0.0067%