Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:58:55 2013

Optimize a model with 68142 rows, 67322 columns and 269042 nonzeros
Presolve removed 6260 rows and 0 columns
Presolve time: 0.43s
Presolved: 61882 rows, 67322 columns, 256522 nonzeros
Variable types: 67240 continuous, 82 integer (82 binary)

Root relaxation: objective 8.584984e+04, 13072 iterations, 3.15 seconds

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

     0     0 85849.8390    0    5          - 85849.8390     -      -    3s
H    0     0                    88281.000000 85849.8390  2.75%     -    3s
H    0     0                    87345.000000 85849.8390  1.71%     -    4s
     0     0 85872.4021    0    6 87345.0000 85872.4021  1.69%     -    4s
     0     0 85872.4021    0    6 87345.0000 85872.4021  1.69%     -    4s
H    0     0                    87231.957447 85872.4021  1.56%     -    6s
H    0     0                    86548.000000 85872.4021  0.78%     -    6s
     0     2 85889.7133    0    6 86548.0000 85889.7133  0.76%     -    7s
*    4     4               3    86311.000000 86109.4777  0.23%   303    8s
*    8     3               5    86309.000000 86109.4777  0.23%   211    9s
    20     2     cutoff    2      86309.0000 86196.1909  0.13%   158   10s

Cutting planes:
  Gomory: 3
  Flow cover: 1

Explored 25 nodes (16882 simplex iterations) in 10.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.630900000000e+04, best bound 8.630900000000e+04, gap 0.0%