Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:53:51 2013

Optimize a model with 640 rows, 14240 columns and 118620 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.19s
Presolved: 620 rows, 14220 columns, 108600 nonzeros
Variable types: 14040 continuous, 180 integer (180 binary)

Root relaxation: objective 4.013975e+04, 440 iterations, 0.02 seconds

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

     0     0 40139.7487    0    6          - 40139.7487     -      -    0s
     0     0 40139.7487    0    6          - 40139.7487     -      -    0s
     0     0 40139.7487    0    6          - 40139.7487     -      -    0s
     0     0 40139.7708    0    6          - 40139.7708     -      -    0s
     0     0 40139.7708    0    6          - 40139.7708     -      -    0s
     0     2 40141.6354    0    6          - 40141.6354     -      -    1s
*   26    11              22    40195.342854 40143.6853  0.13%   8.2    1s
H   27     8                    40195.260475 40143.6853  0.13%   7.9    1s
*   46    14              18    40195.186168 40185.1477  0.02%   6.4    1s

Cutting planes:
  Flow cover: 3

Explored 49 nodes (1064 simplex iterations) in 1.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019518616787e+04, best bound 4.019142768952e+04, gap 0.0094%