Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:36 2013

Optimize a model with 520 rows, 6720 columns and 26260 nonzeros
Presolve removed 20 rows and 580 columns
Presolve time: 0.03s
Presolved: 500 rows, 6140 columns, 24260 nonzeros
Variable types: 6020 continuous, 120 integer (120 binary)

Root relaxation: objective 4.636776e+04, 590 iterations, 0.01 seconds

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

     0     0 46367.7551    0    6          - 46367.7551     -      -    0s
     0     0 46373.1667    0    6          - 46373.1667     -      -    0s
     0     0 46373.1667    0    6          - 46373.1667     -      -    0s
     0     2 46397.9980    0    6          - 46397.9980     -      -    0s
*   38    33              30    46970.859779 46403.7956  1.21%  12.7    0s
*   54    15              16    46692.134334 46405.7390  0.61%  10.9    0s
*   68    15              11    46685.131580 46455.7867  0.49%  10.1    0s
*   77    14              10    46665.599010 46505.1935  0.34%   9.8    0s
*   94     3               8    46657.308374 46648.2736  0.02%   9.0    0s

Cutting planes:
  Flow cover: 2

Explored 105 nodes (1664 simplex iterations) in 0.56 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.665730837396e+04, best bound 4.665367629932e+04, gap 0.0078%