Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:07:46 2013

Optimize a model with 2028 rows, 6044 columns and 16082 nonzeros
Presolve removed 828 rows and 2446 columns
Presolve time: 0.19s
Presolved: 1200 rows, 3598 columns, 7196 nonzeros
Variable types: 2404 continuous, 1194 integer (1194 binary)

Root relaxation: objective 7.659086e+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 7659.08578    0    1          - 7659.08578     -      -    0s
H    0     0                    7673.8627950 7659.08578  0.19%     -    0s
H    0     0                    7664.8067361 7659.08578  0.07%     -    0s
     0     0 7664.38369    0    2 7664.80674 7664.38369  0.01%     -    0s

Cutting planes:
  Cover: 1

Explored 0 nodes (201 simplex iterations) in 0.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.664806736066e+03, best bound 7.664383686964e+03, gap 0.0055%