Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:31:33 2013

Optimize a model with 5140 rows, 16020 columns and 42010 nonzeros
Presolve removed 20 rows and 30 columns
Presolve time: 0.23s
Presolved: 5120 rows, 15990 columns, 31980 nonzeros
Variable types: 11000 continuous, 4990 integer (4990 binary)

Root relaxation: objective 2.207062e+04, 159 iterations, 0.01 seconds

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

     0     0 22070.6191    0    1          - 22070.6191     -      -    0s
     0     0 22071.2829    0    2          - 22071.2829     -      -    0s
     0     0 22071.3325    0    2          - 22071.3325     -      -    0s
     0     0 22071.4238    0    2          - 22071.4238     -      -    0s
     0     0 22071.4271    0    2          - 22071.4271     -      -    0s
     0     0 22071.4271    0    2          - 22071.4271     -      -    0s
     0     0 22071.4271    0    2          - 22071.4271     -      -    0s
     0     0 22071.4271    0    2          - 22071.4271     -      -    0s
H    0     0                    23349.018438 22071.4271  5.47%     -    1s
     0     2 22071.8881    0    2 23349.0184 22071.8881  5.47%     -    1s
H   60    60                    22333.165576 22102.5736  1.03%   1.4    2s
  1222   187 22254.3309   22    1 22333.1656 22245.9443  0.39%   1.9    5s
  4623   120 22286.8222   88    1 22333.1656 22280.5278  0.24%   2.0   10s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 6668 nodes (14150 simplex iterations) in 13.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.233316557625e+04, best bound 2.233119712931e+04, gap 0.0088%