Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:33 2013

Optimize a model with 560 rows, 6200 columns and 26500 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.03s
Presolved: 540 rows, 6180 columns, 24480 nonzeros
Variable types: 6040 continuous, 140 integer (140 binary)

Root relaxation: objective 4.636776e+04, 577 iterations, 0.02 seconds

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

     0     0 46367.7551    0    6          - 46367.7551     -      -    0s
     0     0 46370.4636    0    6          - 46370.4636     -      -    0s
     0     0 46370.4636    0    6          - 46370.4636     -      -    0s
     0     2 46382.7738    0    6          - 46382.7738     -      -    0s
*   24    11              24    46675.477885 46402.0119  0.59%   9.0    0s
H   27     5                    46663.712319 46404.3626  0.56%   9.0    0s
*   32     9               7    46656.829196 46404.3626  0.54%   8.3    0s
*   42    10               7    46653.827166 46561.1245  0.20%   7.9    0s

Cutting planes:
  Flow cover: 2

Explored 50 nodes (1123 simplex iterations) in 0.60 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.665382716636e+04, best bound 4.665200516253e+04, gap 0.0039%