Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:43 2013

Optimize a model with 260 rows, 2360 columns and 11130 nonzeros
Presolve removed 10 rows and 290 columns
Presolve time: 0.01s
Presolved: 250 rows, 2070 columns, 10130 nonzeros
Variable types: 2010 continuous, 60 integer (60 binary)

Root relaxation: objective 1.836170e+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 18361.7044    0    3          - 18361.7044     -      -    0s
     0     0 18362.8356    0    6          - 18362.8356     -      -    0s
     0     0 18381.2294    0    3          - 18381.2294     -      -    0s
     0     0 18394.8400    0   11          - 18394.8400     -      -    0s
     0     0 18400.4801    0    8          - 18400.4801     -      -    0s
     0     0 18400.4801    0    8          - 18400.4801     -      -    0s
H    0     0                    18452.379216 18400.4801  0.28%     -    0s
H    0     0                    18426.564014 18400.4801  0.14%     -    0s
     0     0 18414.4344    0    4 18426.5640 18414.4344  0.07%     -    0s
     0     0 18414.5792    0   10 18426.5640 18414.5792  0.07%     -    0s
     0     0 18414.5792    0   10 18426.5640 18414.5792  0.07%     -    0s
     0     2 18414.5792    0   10 18426.5640 18414.5792  0.07%     -    0s
*    8     7               8    18424.271906 18414.5792  0.05%   7.4    0s
*   20     6               6    18418.241613 18417.4652  0.00%   4.1    0s

Cutting planes:
  Gomory: 2
  Flow cover: 1

Explored 21 nodes (678 simplex iterations) in 0.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.841824161337e+04, best bound 1.841746522294e+04, gap 0.0042%