Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:28:31 2013

Optimize a model with 63279 rows, 62489 columns and 249719 nonzeros
Presolve removed 5130 rows and 0 columns
Presolve time: 0.40s
Presolved: 58149 rows, 62489 columns, 239459 nonzeros
Variable types: 62410 continuous, 79 integer (79 binary)

Root relaxation: objective 8.746361e+04, 11887 iterations, 2.39 seconds

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

     0     0 87463.6052    0    2          - 87463.6052     -      -    2s
H    0     0                    88555.000000 87463.6052  1.23%     -    3s
H    0     0                    87656.000000 87463.6052  0.22%     -    3s
     0     0 87465.3076    0    3 87656.0000 87465.3076  0.22%     -    3s
     0     0 87465.3076    0    3 87656.0000 87465.3076  0.22%     -    4s
     0     0 87465.3076    0    3 87656.0000 87465.3076  0.22%     -    4s
     0     0 87589.9629    0    3 87656.0000 87589.9629  0.08%     -    5s
     0     0 87655.1250    0    1 87656.0000 87655.1250  0.00%     -    5s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 0 nodes (12291 simplex iterations) in 6.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.765600000000e+04, best bound 8.765512500000e+04, gap 0.0010%