Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:25:35 2013 Optimize a model with 51262 rows, 50552 columns and 201782 nonzeros Presolve removed 71 rows and 0 columns Presolve time: 0.23s Presolved: 51191 rows, 50552 columns, 201711 nonzeros Variable types: 50481 continuous, 71 integer (71 binary) Root relaxation: objective 6.274385e+04, 6856 iterations, 4.56 seconds Total elapsed time = 5.04s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62743.8519 0 57 - 62743.8519 - - 5s H 0 0 101911.00000 62743.8519 38.4% - 9s 0 0 79447.2536 0 17 101911.000 79447.2536 22.0% - 16s H 0 0 99751.000000 79447.2536 20.4% - 18s 0 0 86073.8364 0 7 99751.0000 86073.8364 13.7% - 19s H 0 0 97330.864354 86073.8364 11.6% - 19s H 0 0 94112.000000 86073.8364 8.54% - 19s 0 0 86756.1628 0 4 94112.0000 86756.1628 7.82% - 20s H 0 0 92041.541565 86756.1628 5.74% - 20s H 0 0 91443.000000 86756.1628 5.13% - 20s 0 2 86756.5419 0 4 91443.0000 86756.5419 5.13% - 21s H 2 2 89567.583333 86783.9483 3.11% 47.5 21s H 3 3 89513.172824 86823.9276 3.00% 54.3 21s H 6 6 88322.968254 86846.3956 1.67% 107 22s H 9 9 87602.000000 86846.3956 0.86% 109 22s * 26 11 26 87402.000000 86846.3956 0.64% 96.6 24s 30 11 87126.1136 5 4 87402.0000 86989.5007 0.47% 112 25s * 41 16 14 87387.000000 86989.5007 0.45% 111 26s H 50 19 87360.000000 86999.4686 0.41% 117 26s * 51 19 13 87300.000000 86999.4686 0.34% 117 26s * 78 2 10 87099.000000 87009.6021 0.10% 98.1 27s Cutting planes: Implied bound: 70 Explored 81 nodes (22664 simplex iterations) in 27.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.709900000000e+04, best bound 8.709900000000e+04, gap 0.0%