Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:18:53 2013

Optimize a model with 61698 rows, 60918 columns and 243438 nonzeros
Presolve removed 4845 rows and 0 columns
Presolve time: 0.38s
Presolved: 56853 rows, 60918 columns, 233748 nonzeros
Variable types: 60840 continuous, 78 integer (78 binary)

Root relaxation: objective 8.980930e+04, 12310 iterations, 2.44 seconds

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

     0     0 89809.2955    0    3          - 89809.2955     -      -    2s
H    0     0                    92376.000000 89809.2955  2.78%     -    3s
     0     0 89815.1278    0    4 92376.0000 89815.1278  2.77%     -    3s
     0     0 89815.2388    0    4 92376.0000 89815.2388  2.77%     -    4s
H    0     0                    91264.260546 89815.2388  1.59%     -    5s
H    0     0                    90721.906458 89815.2388  1.00%     -    5s
H    0     0                    90469.000000 89815.2388  0.72%     -    5s
     0     0 89815.2388    0    3 90469.0000 89815.2388  0.72%     -    8s
     0     0 89818.4265    0    5 90469.0000 89818.4265  0.72%     -    8s
     0     0 89818.6154    0    5 90469.0000 89818.6154  0.72%     -    8s
     0     2 89830.5443    0    5 90469.0000 89830.5443  0.71%     -   10s
H    4     3                    90104.000000 89936.7807  0.19%   349   10s
H    5     3                    90098.200000 89936.7807  0.18%   316   11s
H    6     4                    90083.579710 89936.7807  0.16%   264   11s
*    8     3               7    90066.000000 89936.7807  0.14%   208   11s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 12 nodes (21339 simplex iterations) in 11.39 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.006600000000e+04, best bound 9.006600000000e+04, gap 0.0%