Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:19:16 2013 Optimize a model with 858 rows, 60918 columns and 121758 nonzeros Presolve time: 0.09s Presolved: 858 rows, 60918 columns, 121758 nonzeros Variable types: 60840 continuous, 78 integer (78 binary) Root relaxation: objective 8.768146e+04, 2188 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 87681.4551 0 8 - 87681.4551 - - 0s H 0 0 89843.000000 87681.4551 2.41% - 0s H 0 0 87962.000000 87681.4551 0.32% - 0s 0 0 87827.4817 0 6 87962.0000 87827.4817 0.15% - 0s 0 0 87827.4817 0 8 87962.0000 87827.4817 0.15% - 0s 0 0 87834.5841 0 6 87962.0000 87834.5841 0.14% - 0s 0 0 87847.4252 0 5 87962.0000 87847.4252 0.13% - 0s 0 0 87850.5024 0 4 87962.0000 87850.5024 0.13% - 0s 0 0 87850.7489 0 4 87962.0000 87850.7489 0.13% - 1s 0 0 87850.7939 0 4 87962.0000 87850.7939 0.13% - 1s 0 0 87851.6525 0 6 87962.0000 87851.6525 0.13% - 1s 0 0 87853.4365 0 5 87962.0000 87853.4365 0.12% - 1s 0 0 87853.4365 0 5 87962.0000 87853.4365 0.12% - 1s 0 0 87853.4365 0 5 87962.0000 87853.4365 0.12% - 1s 0 0 87853.4387 0 5 87962.0000 87853.4387 0.12% - 1s 0 0 87864.6417 0 3 87962.0000 87864.6417 0.11% - 1s 0 0 87865.1371 0 4 87962.0000 87865.1371 0.11% - 1s 0 0 87865.1728 0 3 87962.0000 87865.1728 0.11% - 1s 0 2 87870.0519 0 3 87962.0000 87870.0519 0.10% - 1s * 6 1 5 87932.000000 87930.2833 0.00% 36.5 1s Cutting planes: Implied bound: 105 Flow cover: 5 Explored 7 nodes (4679 simplex iterations) in 1.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.793200000000e+04, best bound 8.793028325128e+04, gap 0.0020%