Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:19 2013

Optimize a model with 56 rows, 570 columns and 4110 nonzeros
Presolve removed 22 rows and 136 columns
Presolve time: 0.01s
Presolved: 34 rows, 434 columns, 3666 nonzeros
Variable types: 420 continuous, 14 integer (14 binary)

Root relaxation: objective 4.810927e+03, 16 iterations, 0.00 seconds

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

     0     0 4810.92679    0    8          - 4810.92679     -      -    0s
     0     0 4814.36943    0    8          - 4814.36943     -      -    0s
     0     0 4814.58172    0    8          - 4814.58172     -      -    0s
     0     0 4829.03699    0    6          - 4829.03699     -      -    0s
     0     0 4829.03699    0    6          - 4829.03699     -      -    0s
     0     0 4829.03699    0    6          - 4829.03699     -      -    0s
     0     0 4829.10938    0   12          - 4829.10938     -      -    0s
     0     0 4829.14939    0   12          - 4829.14939     -      -    0s
H    0     0                    4840.7315592 4829.14939  0.24%     -    0s
     0     2 4829.29622    0   12 4840.73156 4829.29622  0.24%     -    0s
*   11     5               9    4831.6051331 4829.29622  0.05%   2.5    0s
*   16     1               3    4831.1180431 4831.11804   0.0%   3.1    0s

Cutting planes:
  Gomory: 2
  Implied bound: 2
  Flow cover: 5

Explored 17 nodes (204 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831118043089e+03, best bound 4.831118043089e+03, gap 0.0%