Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:28:18 2013

Optimize a model with 160 rows, 2810 columns and 28155 nonzeros
Presolve removed 5 rows and 5 columns
Presolve time: 0.05s
Presolved: 155 rows, 2805 columns, 25650 nonzeros
Variable types: 2760 continuous, 45 integer (45 binary)

Root relaxation: objective 1.204447e+04, 46 iterations, 0.00 seconds

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

     0     0 12044.4669    0    3          - 12044.4669     -      -    0s
     0     0 12044.5648    0    3          - 12044.5648     -      -    0s
     0     0 12090.0730    0    3          - 12090.0730     -      -    0s
     0     0 12095.5236    0    3          - 12095.5236     -      -    0s
     0     0 12097.6211    0    3          - 12097.6211     -      -    0s
     0     0 12097.6211    0    3          - 12097.6211     -      -    0s
H    0     0                    12418.550106 12097.6211  2.58%     -    0s
H    0     0                    12109.086921 12097.6211  0.09%     -    0s
     0     0 12097.6855    0    1 12109.0869 12097.6855  0.09%     -    0s
     0     0 12097.6855    0    1 12109.0869 12097.6855  0.09%     -    0s
     0     0 12097.7390    0    1 12109.0869 12097.7390  0.09%     -    0s
     0     0 12097.7390    0    1 12109.0869 12097.7390  0.09%     -    0s
     0     2 12097.7664    0    1 12109.0869 12097.7664  0.09%     -    0s
*   11     4              11    12102.500584 12097.7757  0.04%   4.5    0s
*   15     0               4    12097.776310 12097.7763   0.0%   3.6    0s

Cutting planes:
  Flow cover: 1

Explored 16 nodes (301 simplex iterations) in 0.51 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.209777630968e+04, best bound 1.209777630968e+04, gap 0.0%