Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:40:25 2013

Optimize a model with 320 rows, 6120 columns and 57310 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.25s
Presolved: 310 rows, 6110 columns, 52300 nonzeros
Variable types: 6020 continuous, 90 integer (90 binary)

Root relaxation: objective 2.199252e+04, 128 iterations, 0.02 seconds

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

     0     0 21992.5209    0    6          - 21992.5209     -      -    0s
     0     0 21992.8054    0    6          - 21992.8054     -      -    0s
     0     0 22057.7158    0    6          - 22057.7158     -      -    0s
     0     0 22057.7158    0    6          - 22057.7158     -      -    0s
     0     2 22059.0266    0    6          - 22059.0266     -      -    1s
*   12     7              10    22136.330079 22060.4985  0.34%   7.6    1s
*   35     4              12    22135.316195 22119.2136  0.07%   5.2    1s

Cutting planes:
  Flow cover: 2

Explored 45 nodes (486 simplex iterations) in 1.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.213531619461e+04, best bound 2.213315014264e+04, gap 0.0098%