Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:47:10 2013 Optimize a model with 41664 rows, 41024 columns and 163904 nonzeros Presolve removed 3286 rows and 0 columns Presolve time: 0.24s Presolved: 38378 rows, 41024 columns, 157332 nonzeros Variable types: 40960 continuous, 64 integer (64 binary) Root relaxation: objective 6.072248e+04, 6004 iterations, 0.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 60722.4788 0 5 - 60722.4788 - - 1s H 0 0 63228.000000 60722.4788 3.96% - 1s H 0 0 62839.000000 60722.4788 3.37% - 1s 0 0 60723.3431 0 6 62839.0000 60723.3431 3.37% - 1s H 0 0 62837.000000 60723.3431 3.36% - 1s 0 0 60724.1064 0 6 62837.0000 60724.1064 3.36% - 1s 0 0 60724.1064 0 6 62837.0000 60724.1064 3.36% - 1s H 0 0 62612.000000 60724.1064 3.02% - 2s 0 2 60736.5486 0 6 62612.0000 60736.5486 3.00% - 2s H 4 4 61707.928571 61010.2744 1.13% 127 3s H 5 5 61415.585366 61010.2744 0.66% 170 3s H 11 8 61252.000000 61010.2744 0.39% 111 3s * 18 10 16 61235.000000 61010.2744 0.37% 85.7 3s * 29 11 9 61219.000000 61070.8630 0.24% 76.6 4s * 41 4 13 61179.000000 61122.0000 0.09% 77.5 4s Cutting planes: Gomory: 2 Flow cover: 6 Explored 46 nodes (9286 simplex iterations) in 4.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.117900000000e+04, best bound 6.117900000000e+04, gap 0.0%