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

Optimize a model with 228 rows, 644 columns and 1682 nonzeros
Presolve removed 218 rows and 616 columns
Presolve time: 0.01s
Presolved: 10 rows, 28 columns, 56 nonzeros
Variable types: 24 continuous, 4 integer (4 binary)

Root relaxation: objective 5.497312e+03, 5 iterations, 0.00 seconds

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

     0     0 5497.31217    0    1          - 5497.31217     -      -    0s
H    0     0                    5507.2686356 5497.31217  0.18%     -    0s
H    0     0                    5503.9213056 5497.31217  0.12%     -    0s
     0     0     cutoff    0      5503.92131 5503.92131   0.0%     -    0s

Cutting planes:
  Cover: 1

Explored 0 nodes (6 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.503921305564e+03, best bound 5.503921305564e+03, gap 0.0%