Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:32:43 2013 Optimize a model with 52704 rows, 51984 columns and 207504 nonzeros Presolve removed 72 rows and 0 columns Presolve time: 0.24s Presolved: 52632 rows, 51984 columns, 207432 nonzeros Variable types: 51912 continuous, 72 integer (72 binary) Root relaxation: objective 6.352834e+04, 6956 iterations, 4.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63528.3420 0 53 - 63528.3420 - - 4s H 0 0 105484.00000 63528.3420 39.8% - 7s 0 0 82202.2322 0 22 105484.000 82202.2322 22.1% - 15s H 0 0 97761.000000 82202.2322 15.9% - 17s 0 0 87644.2561 0 8 97761.0000 87644.2561 10.3% - 20s H 0 0 97753.000000 87644.2561 10.3% - 20s 0 0 87936.5869 0 4 97753.0000 87936.5869 10.0% - 21s H 0 0 94468.049721 87936.5869 6.91% - 21s H 0 0 93604.000000 87936.5869 6.05% - 21s H 0 0 88810.000000 87936.5869 0.98% - 22s H 0 0 88772.677419 87936.5869 0.94% - 22s H 0 0 88533.000000 87936.5869 0.67% - 23s 0 2 87938.2449 0 4 88533.0000 87938.2449 0.67% - 24s 2 4 88137.3677 1 3 88533.0000 88103.9739 0.48% 588 25s * 25 8 24 88479.000000 88104.0489 0.42% 151 27s * 49 14 7 88465.000000 88146.7622 0.36% 144 29s 57 10 88281.4834 5 2 88465.0000 88198.5430 0.30% 150 30s * 62 8 8 88396.000000 88198.5430 0.22% 148 30s Cutting planes: Implied bound: 70 Explored 73 nodes (26508 simplex iterations) in 30.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.839600000000e+04, best bound 8.838929711752e+04, gap 0.0076%