Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:35:11 2013 Optimize a model with 2600 rows, 105900 columns and 242200 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.32s Presolved: 2500 rows, 105800 columns, 237100 nonzeros Variable types: 105200 continuous, 600 integer (600 binary) Root relaxation: objective 8.570461e+05, 6875 iterations, 0.60 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 1011290.3926 857046.104 15.3% - 1s 0 0 857084.895 0 3 1011290.39 857084.895 15.2% - 1s 0 0 857098.918 0 3 1011290.39 857098.918 15.2% - 1s 0 0 857098.936 0 3 1011290.39 857098.936 15.2% - 2s 0 0 857103.192 0 3 1011290.39 857103.192 15.2% - 2s 0 0 857105.777 0 3 1011290.39 857105.777 15.2% - 2s 0 0 857107.325 0 3 1011290.39 857107.325 15.2% - 3s 0 0 857109.016 0 3 1011290.39 857109.016 15.2% - 3s 0 0 857109.484 0 3 1011290.39 857109.484 15.2% - 3s 0 0 857110.118 0 3 1011290.39 857110.118 15.2% - 3s 0 0 857110.118 0 3 1011290.39 857110.118 15.2% - 4s 0 0 857110.254 0 3 1011290.39 857110.254 15.2% - 4s 0 0 857110.254 0 3 1011290.39 857110.254 15.2% - 5s 0 2 857180.263 0 3 1011290.39 857180.263 15.2% - 5s 12 14 859012.178 12 3 1011290.39 858124.827 15.1% 126 10s H 27 27 878702.18380 858124.827 2.34% 75.1 13s 33 35 860153.760 33 4 878702.184 858124.827 2.34% 70.8 15s 69 63 863038.423 69 1 878702.184 858124.827 2.34% 53.3 20s H 81 37 863103.20523 858124.827 0.58% 45.7 20s 174 63 858888.029 6 3 863103.205 858125.568 0.58% 26.6 25s H 189 10 859304.61347 858125.568 0.14% 25.8 28s * 200 15 30 859281.71597 858125.568 0.13% 24.9 28s 213 25 858738.582 11 3 859281.716 858247.942 0.12% 27.8 30s H 270 35 859210.39245 858439.607 0.09% 31.2 33s 317 53 859170.601 35 3 859210.392 858685.547 0.06% 29.0 35s H 433 10 859029.76689 858904.273 0.01% 23.0 37s * 448 16 26 859025.39106 858907.023 0.01% 22.5 38s Cutting planes: Flow cover: 11 Explored 456 nodes (19871 simplex iterations) in 38.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.590253910645e+05, best bound 8.589465481629e+05, gap 0.0092%