Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:17 2013

Optimize a model with 228 rows, 644 columns and 1682 nonzeros
Presolve removed 212 rows and 595 columns
Presolve time: 0.01s
Presolved: 16 rows, 49 columns, 98 nonzeros
Variable types: 39 continuous, 10 integer (10 binary)

Root relaxation: objective 5.281733e+03, 6 iterations, 0.00 seconds

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

     0     0 5281.73269    0    1          - 5281.73269     -      -    0s
H    0     0                    5296.3109775 5281.73269  0.28%     -    0s
     0     0 5296.29352    0    2 5296.31098 5296.29352  0.00%     -    0s

Cutting planes:
  Cover: 1
  Flow cover: 1

Explored 0 nodes (14 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.296310977461e+03, best bound 5.296293522408e+03, gap 0.0003%