Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:39 2013

Optimize a model with 520 rows, 6720 columns and 26260 nonzeros
Presolve removed 20 rows and 580 columns
Presolve time: 0.04s
Presolved: 500 rows, 6140 columns, 24260 nonzeros
Variable types: 6020 continuous, 120 integer (120 binary)

Root relaxation: objective 4.370285e+04, 485 iterations, 0.01 seconds

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

     0     0 43702.8549    0    6          - 43702.8549     -      -    0s
     0     0 43708.8008    0    6          - 43708.8008     -      -    0s
     0     0 43708.9552    0    9          - 43708.9552     -      -    0s
     0     0 43708.9775    0    9          - 43708.9775     -      -    0s
     0     0 43708.9785    0    9          - 43708.9785     -      -    0s
     0     0 43709.0246    0    9          - 43709.0246     -      -    0s
     0     0 43709.0246    0    9          - 43709.0246     -      -    0s
H    0     0                    47814.290702 43709.0246  8.59%     -    0s
     0     2 43709.5984    0    9 47814.2907 43709.5984  8.58%     -    0s
*   33    28              31    44136.592205 43839.0806  0.67%   9.8    0s
*   47    26              15    44112.980907 43847.3889  0.60%   8.9    0s
*   79    39              26    44076.030771 43853.2575  0.51%   8.0    0s
*   87    20              10    44052.747892 43878.2182  0.40%   7.6    0s
*  102    15              13    43935.302367 43878.2182  0.13%   7.4    0s
H  114     0                    43900.849511 43900.7573  0.00%   6.9    0s

Cutting planes:
  Flow cover: 8

Explored 114 nodes (1617 simplex iterations) in 0.63 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390084951135e+04, best bound 4.390075734716e+04, gap 0.0002%