Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:37 2013

Optimize a model with 640 rows, 2520 columns and 6010 nonzeros
Presolve removed 20 rows and 30 columns
Presolve time: 0.04s
Presolved: 620 rows, 2490 columns, 4980 nonzeros
Variable types: 2000 continuous, 490 integer (490 binary)

Root relaxation: objective 2.199252e+04, 96 iterations, 0.00 seconds

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

     0     0 21992.5209    0    2          - 21992.5209     -      -    0s
     0     0 21997.4381    0    2          - 21997.4381     -      -    0s
     0     0 21997.6260    0    3          - 21997.6260     -      -    0s
     0     0 21997.8061    0    2          - 21997.8061     -      -    0s
     0     0 21997.8061    0    2          - 21997.8061     -      -    0s
H    0     0                    23630.146917 21997.8061  6.91%     -    0s
     0     2 22004.6156    0    2 23630.1469 22004.6156  6.88%     -    0s
*   18    16              13    22192.822543 22066.0433  0.57%   4.2    0s
*   20    13              13    22191.315127 22066.0433  0.56%   3.9    0s
*   31     9              12    22141.712813 22066.3329  0.34%   3.5    0s
*   70     8              11    22134.932338 22086.9773  0.22%   3.7    0s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 85 nodes (603 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.213493233821e+04, best bound 2.213493233821e+04, gap 0.0%