Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:25 2013

Optimize a model with 23568 rows, 23088 columns and 92208 nonzeros
Presolve removed 359 rows and 0 columns
Presolve time: 0.13s
Presolved: 23209 rows, 23088 columns, 91490 nonzeros
Variable types: 23040 continuous, 48 integer (48 binary)

Root relaxation: objective 5.246733e+04, 3565 iterations, 0.33 seconds

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

     0     0 52467.3339    0    5          - 52467.3339     -      -    0s
H    0     0                    52980.000000 52467.3339  0.97%     -    0s
     0     0 52474.5702    0    7 52980.0000 52474.5702  0.95%     -    0s
H    0     0                    52632.000000 52474.5702  0.30%     -    0s
     0     0 52474.6992    0    7 52632.0000 52474.6992  0.30%     -    0s
     0     0 52474.6992    0    7 52632.0000 52474.6992  0.30%     -    0s
     0     0 52477.6154    0    6 52632.0000 52477.6154  0.29%     -    1s
H    0     0                    52600.000000 52477.6154  0.23%     -    1s
     0     0 52477.6154    0    5 52600.0000 52477.6154  0.23%     -    1s
     0     0 52479.5140    0    6 52600.0000 52479.5140  0.23%     -    1s
     0     0 52479.5140    0    6 52600.0000 52479.5140  0.23%     -    2s
     0     0 52479.5140    0    6 52600.0000 52479.5140  0.23%     -    2s
     0     2 52484.0843    0    6 52600.0000 52484.0843  0.22%     -    2s
*    5     4               5    52560.000000 52532.6385  0.05%  30.6    2s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 9 nodes (6009 simplex iterations) in 2.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.256000000000e+04, best bound 5.256000000000e+04, gap 0.0%