Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:48 2013

Optimize a model with 300 rows, 3110 columns and 22280 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.03s
Presolved: 290 rows, 3100 columns, 20270 nonzeros
Variable types: 3020 continuous, 80 integer (80 binary)

Root relaxation: objective 1.791602e+04, 134 iterations, 0.00 seconds

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

     0     0 17916.0191    0    9          - 17916.0191     -      -    0s
     0     0 17916.5551    0    9          - 17916.5551     -      -    0s
     0     0 17916.6771    0    9          - 17916.6771     -      -    0s
     0     0 17916.8597    0    9          - 17916.8597     -      -    0s
     0     0 17916.8597    0   11          - 17916.8597     -      -    0s
     0     0 17920.2502    0    6          - 17920.2502     -      -    0s
     0     0 17920.2502    0    6          - 17920.2502     -      -    0s
H    0     0                    18395.198750 17920.2502  2.58%     -    0s
     0     2 17920.2502    0    6 18395.1987 17920.2502  2.58%     -    0s
*   13    11              12    17985.524725 17962.3582  0.13%  10.1    0s
*   16    10              15    17984.572112 17962.3582  0.12%   8.8    0s
*   30    11               9    17984.443210 17969.2629  0.08%   6.1    0s

Cutting planes:
  Flow cover: 3

Explored 35 nodes (507 simplex iterations) in 0.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.798444321043e+04, best bound 1.798326736966e+04, gap 0.0065%