Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:51:54 2013

Optimize a model with 57075 rows, 56325 columns and 225075 nonzeros
Presolve removed 4377 rows and 0 columns
Presolve time: 0.35s
Presolved: 52698 rows, 56325 columns, 216321 nonzeros
Variable types: 56250 continuous, 75 integer (75 binary)

Root relaxation: objective 8.458436e+04, 11676 iterations, 2.60 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 84584.3629    0    2          - 84584.3629     -      -    3s
H    0     0                    84971.000000 84584.3629  0.46%     -    3s
     0     0 84586.0973    0    3 84971.0000 84586.0973  0.45%     -    3s
     0     0 84586.0973    0    2 84971.0000 84586.0973  0.45%     -    5s
     0     0 84586.1105    0    3 84971.0000 84586.1105  0.45%     -    6s
     0     2 84586.4581    0    3 84971.0000 84586.4581  0.45%     -    7s
*   11     7               8    84883.000000 84654.0071  0.27%   124    8s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 19 nodes (18397 simplex iterations) in 8.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.488300000000e+04, best bound 8.488300000000e+04, gap 0.0%