Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:44:47 2013 Optimize a model with 2200 rows, 101700 columns and 207600 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.44s Presolved: 2100 rows, 101600 columns, 206500 nonzeros Variable types: 101200 continuous, 400 integer (400 binary) Root relaxation: objective 8.570461e+05, 5632 iterations, 0.78 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 857046.104 0 3 - 857046.104 - - 1s H 0 0 896638.58028 857046.104 4.42% - 1s 0 0 857083.871 0 3 896638.580 857083.871 4.41% - 2s 0 0 857091.383 0 3 896638.580 857091.383 4.41% - 2s 0 0 857102.034 0 3 896638.580 857102.034 4.41% - 3s 0 0 857102.232 0 3 896638.580 857102.232 4.41% - 3s 0 0 857111.313 0 3 896638.580 857111.313 4.41% - 3s 0 0 857114.740 0 3 896638.580 857114.740 4.41% - 4s 0 0 857117.587 0 3 896638.580 857117.587 4.41% - 4s 0 0 857119.598 0 3 896638.580 857119.598 4.41% - 4s 0 0 857120.906 0 3 896638.580 857120.906 4.41% - 5s 0 0 857122.202 0 3 896638.580 857122.202 4.41% - 5s 0 0 857123.290 0 3 896638.580 857123.290 4.41% - 6s 0 0 857123.967 0 3 896638.580 857123.967 4.41% - 6s 0 0 857124.455 0 3 896638.580 857124.455 4.41% - 7s 0 0 857124.533 0 3 896638.580 857124.533 4.41% - 7s 0 0 857124.533 0 3 896638.580 857124.533 4.41% - 8s 0 2 857261.850 0 3 896638.580 857261.850 4.39% - 9s 1 3 858163.414 1 3 896638.580 858163.414 4.29% 692 10s 16 18 859524.865 16 3 896638.580 858210.856 4.29% 110 15s H 27 18 865225.35908 858210.856 0.81% 82.0 18s 38 21 861307.991 38 1 865225.359 858210.856 0.81% 71.1 20s 77 37 862687.549 77 1 865225.359 858210.856 0.81% 44.9 25s * 79 29 79 862690.31238 858210.856 0.52% 43.8 25s 93 34 858984.853 13 3 862690.312 858296.821 0.51% 48.3 30s * 99 10 18 859168.59169 858296.821 0.10% 46.3 30s * 143 20 13 859151.14532 858685.547 0.05% 42.4 33s * 161 5 17 859005.98790 858974.517 0.00% 38.8 33s Cutting planes: Flow cover: 14 Explored 162 nodes (14010 simplex iterations) in 33.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.590059879047e+05, best bound 8.589745174003e+05, gap 0.0037%