Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:52:04 2013

Optimize a model with 57075 rows, 56325 columns and 225075 nonzeros
Presolve removed 2874 rows and 0 columns
Presolve time: 0.37s
Presolved: 54201 rows, 56325 columns, 219327 nonzeros
Variable types: 56250 continuous, 75 integer (75 binary)

Root relaxation: objective 8.371143e+04, 11394 iterations, 2.04 seconds

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

     0     0 83711.4251    0    6          - 83711.4251     -      -    2s
H    0     0                    85712.000000 83711.4251  2.33%     -    2s
H    0     0                    84262.000000 83711.4251  0.65%     -    3s
     0     0 83715.2273    0    7 84262.0000 83715.2273  0.65%     -    3s
     0     0 83715.5358    0    7 84262.0000 83715.5358  0.65%     -    3s
H    0     0                    84024.726496 83715.5358  0.37%     -    5s
H    0     0                    83970.000000 83715.5358  0.30%     -    5s
     0     0 83715.5358    0    6 83970.0000 83715.5358  0.30%     -    7s
     0     0 83715.6446    0    7 83970.0000 83715.6446  0.30%     -    7s
     0     2 83717.3085    0    7 83970.0000 83717.3085  0.30%     -    9s
    12     5 83966.8571    8    2 83970.0000 83839.6181  0.16%   111   10s
*   17     0               5    83945.000000 83945.0000   0.0%   111   10s

Cutting planes:
  Gomory: 2
  Flow cover: 1

Explored 18 nodes (18335 simplex iterations) in 10.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.394500000000e+04, best bound 8.394500000000e+04, gap 0.0%