Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:38 2013

Optimize a model with 560 rows, 6200 columns and 26500 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.04s
Presolved: 540 rows, 6180 columns, 24480 nonzeros
Variable types: 6040 continuous, 140 integer (140 binary)

Root relaxation: objective 3.860476e+04, 476 iterations, 0.01 seconds

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

     0     0 38604.7615    0    9          - 38604.7615     -      -    0s
     0     0 38611.6943    0    9          - 38611.6943     -      -    0s
     0     0 38611.6943    0    9          - 38611.6943     -      -    0s
H    0     0                    43509.735179 38611.6943  11.3%     -    0s
     0     2 38611.6943    0    9 43509.7352 38611.6943  11.3%     -    0s
*   12     8              12    38861.053354 38830.2345  0.08%  13.4    0s

Cutting planes:
  Flow cover: 3

Explored 28 nodes (900 simplex iterations) in 0.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886105335407e+04, best bound 3.885753386077e+04, gap 0.0091%