Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:23 2013

Optimize a model with 2028 rows, 2044 columns and 8082 nonzeros
Presolve removed 1896 rows and 1905 columns
Presolve time: 0.13s
Presolved: 132 rows, 139 columns, 404 nonzeros
Variable types: 76 continuous, 63 integer (63 binary)

Root relaxation: objective 5.420106e+03, 66 iterations, 0.00 seconds

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

     0     0 5420.10604    0    1          - 5420.10604     -      -    0s
H    0     0                    5441.6178882 5420.10604  0.40%     -    0s
     0     0 5441.61361    0    2 5441.61789 5441.61361  0.00%     -    0s

Cutting planes:
  Implied bound: 1
  Flow cover: 2

Explored 0 nodes (98 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.441617888152e+03, best bound 5.441613609645e+03, gap 0.0001%