Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:53:16 2013

Optimize a model with 640 rows, 14240 columns and 118620 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.23s
Presolved: 620 rows, 14220 columns, 108600 nonzeros
Variable types: 14040 continuous, 180 integer (180 binary)

Root relaxation: objective 3.839329e+04, 489 iterations, 0.02 seconds

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

     0     0 38393.2919    0    6          - 38393.2919     -      -    0s
     0     0 38393.8935    0    6          - 38393.8935     -      -    0s
     0     0 38394.3862    0    8          - 38394.3862     -      -    0s
     0     0 38394.7450    0    7          - 38394.7450     -      -    0s
     0     0 38394.8313    0    9          - 38394.8313     -      -    0s
     0     0 38394.8313    0    9          - 38394.8313     -      -    0s
     0     2 38394.9729    0    9          - 38394.9729     -      -    2s
*   45    11              44    38636.811662 38426.5039  0.54%   6.6    2s
*   49     9              43    38636.645310 38426.5039  0.54%   6.2    2s

Cutting planes:
  Flow cover: 6

Explored 78 nodes (1175 simplex iterations) in 2.92 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863664531049e+04, best bound 3.863427787291e+04, gap 0.0061%