Gurobi 5.0.1 (linux64) logging started Sat Dec  8 02:35:13 2012

Optimize a model with 285 rows, 270 columns and 889 nonzeros
Presolve removed 22 rows and 13 columns
Presolve time: 0.00s
Presolved: 263 rows, 257 columns, 837 nonzeros
Variable types: 171 continuous, 86 integer (86 binary)

Root relaxation: objective 2.269454e+04, 128 iterations, 0.00 seconds

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

     0     0 22694.5449    0   37          - 22694.5449     -      -    0s
H    0     0                    35190.000000 22694.5449  35.5%     -    0s
     0     0 27279.7954    0   12 35190.0000 27279.7954  22.5%     -    0s
H    0     0                    30999.000000 27279.7954  12.0%     -    0s
     0     0 27533.9988    0    6 30999.0000 27533.9988  11.2%     -    0s
     0     0 27534.0989    0    3 30999.0000 27534.0989  11.2%     -    0s
     0     2 27534.7279    0    3 30999.0000 27534.7279  11.2%     -    0s
H    3     3                    28716.011561 27540.4563  4.09%   1.3    0s
H    4     4                    27834.000000 27540.4563  1.05%   2.0    0s
*    5     4               5    27738.000000 27540.4563  0.71%   2.2    0s
*   19     3               2    27635.000000 27574.0659  0.22%   2.6    0s
*   23     0               3    27608.000000 27608.0000   0.0%   2.6    0s

Cutting planes:
  Gomory: 11
  Cover: 1
  Implied bound: 1
  Flow cover: 26
  Flow path: 12

Explored 24 nodes (252 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.760800000000e+04, best bound 2.760800000000e+04, gap 0.0%