Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:27:34 2013

Optimize a model with 34278 rows, 33698 columns and 134618 nonzeros
Presolve removed 3171 rows and 0 columns
Presolve time: 0.20s
Presolved: 31107 rows, 33698 columns, 128276 nonzeros
Variable types: 33640 continuous, 58 integer (58 binary)

Root relaxation: objective 5.460597e+04, 4867 iterations, 0.53 seconds

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

     0     0 54605.9701    0    2          - 54605.9701     -      -    0s
H    0     0                    54951.000000 54605.9701  0.63%     -    0s
     0     0 54609.4265    0    3 54951.0000 54609.4265  0.62%     -    1s
     0     0 54609.4265    0    3 54951.0000 54609.4265  0.62%     -    1s
     0     0 54609.4265    0    3 54951.0000 54609.4265  0.62%     -    1s
     0     0 54609.4265    0    2 54951.0000 54609.4265  0.62%     -    2s
     0     0 54609.4265    0    3 54951.0000 54609.4265  0.62%     -    2s
     0     2 54609.9362    0    3 54951.0000 54609.9362  0.62%     -    3s
H    5     5                    54847.000000 54696.1002  0.28%  57.0    3s
*    6     5               4    54818.000000 54696.1002  0.22%  63.8    3s
H    8     3                    54816.230769 54696.1002  0.22%  47.9    3s
*   10     3               5    54811.000000 54696.1002  0.21%  41.0    3s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 18 nodes (7890 simplex iterations) in 3.59 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.481100000000e+04, best bound 5.480700000000e+04, gap 0.0073%