Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:23:18 2013 Optimize a model with 2800 rows, 126500 columns and 401500 nonzeros Presolve removed 100 rows and 5700 columns Presolve time: 0.91s Presolved: 2700 rows, 120800 columns, 381500 nonzeros Variable types: 120100 continuous, 700 integer (700 binary) Root relaxation: objective 8.951303e+05, 7296 iterations, 1.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 16 - 895130.293 - - 2s 0 0 895170.526 0 16 - 895170.526 - - 3s 0 0 895171.882 0 16 - 895171.882 - - 3s 0 0 895173.696 0 16 - 895173.696 - - 4s 0 0 895173.696 0 16 - 895173.696 - - 4s 0 0 895173.696 0 16 - 895173.696 - - 5s 0 0 895173.696 0 16 - 895173.696 - - 5s 0 0 895173.696 0 16 - 895173.696 - - 6s 0 0 895173.696 0 16 - 895173.696 - - 9s H 0 0 921143.21481 895173.696 2.82% - 10s 0 2 895176.002 0 16 921143.215 895176.002 2.82% - 11s 10 12 895564.283 10 4 921143.215 895469.735 2.79% 97.6 15s 20 22 895732.501 20 6 921143.215 895469.735 2.79% 71.2 20s H 27 27 907795.44555 895469.735 1.36% 58.0 23s 34 36 895886.612 34 4 907795.446 895469.735 1.36% 50.8 25s 54 50 896470.215 54 4 907795.446 895469.735 1.36% 37.3 30s 72 64 897083.388 72 6 907795.446 895469.735 1.36% 31.9 35s 81 66 897641.317 81 4 907795.446 895469.735 1.36% 32.2 40s * 86 50 86 898078.20513 895469.735 0.29% 31.6 42s 94 46 897621.187 9 7 898078.205 895533.504 0.28% 36.4 45s 163 101 897856.098 68 3 898078.205 895533.504 0.28% 26.0 50s 257 142 cutoff 12 898078.205 895636.584 0.27% 22.9 55s 354 141 897990.610 66 4 898078.205 895778.764 0.26% 22.7 60s 432 198 897220.469 66 1 898078.205 895844.164 0.25% 22.7 65s H 435 97 897467.79515 895844.164 0.18% 22.6 65s 499 115 897026.414 24 3 897467.795 896297.735 0.13% 22.1 70s H 504 48 897073.66303 896297.735 0.09% 21.9 70s * 542 11 22 896634.43616 896559.305 0.01% 23.6 72s Cutting planes: Flow cover: 16 Explored 543 nodes (22628 simplex iterations) in 72.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.966344361626e+05, best bound 8.965593048855e+05, gap 0.0084%