Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:30:38 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 2.199252e+04, 125 iterations, 0.01 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 21993.1318    0    4          - 21993.1318     -      -    0s
     0     0 21993.1438    0    4          - 21993.1438     -      -    0s
     0     0 21993.1438    0    4          - 21993.1438     -      -    0s
     0     2 21993.3487    0    4          - 21993.3487     -      -    1s
   505   343 22282.3850  497    1          - 22065.4013     -    1.9    5s
*  507   317             498    22282.707851 22065.4013  0.98%   1.9    5s
*  510   312             499    22282.526625 22065.4013  0.97%   1.8    5s
H  600   390                    22278.358358 22065.4898  0.96%   1.8    5s
H  685   412                    22143.777952 22065.4898  0.35%   5.4    9s
*  751   374              98    22136.330079 22065.4898  0.32%   5.7    9s
   760   364 22065.4898   20    1 22136.3301 22065.4898  0.32%   5.7   10s
*  855   318              97    22134.958679 22065.4898  0.31%   6.3   10s
  3796  1361 22117.9499   85    1 22134.9587 22097.6496  0.17%   2.5   15s

Cutting planes:
  Gomory: 2
  Flow cover: 4

Explored 5412 nodes (15801 simplex iterations) in 19.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.213495867877e+04, best bound 2.213275003484e+04, gap 0.0100%