Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:12:39 2013

Optimize a model with 575 rows, 7412 columns and 233060 nonzeros
Presolve removed 44 rows and 233 columns
Presolve time: 1.66s
Presolved: 531 rows, 7179 columns, 224886 nonzeros
Variable types: 0 continuous, 7179 integer (7179 binary)
Found heuristic solution: objective 3635.0000000

Root relaxation: objective 2.529750e+03, 1283 iterations, 0.17 seconds

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

     0     0 2529.75000    0   28 3635.00000 2529.75000  30.4%     -    1s
H    0     0                    2566.0000000 2529.75000  1.41%     -    2s
     0     0 2533.11765    0   69 2566.00000 2533.11765  1.28%     -    2s
H    0     0                    2563.0000000 2533.11765  1.17%     -    3s
     0     0 2533.11765    0   28 2563.00000 2533.11765  1.17%     -    3s
     0     0 2534.75000    0   67 2563.00000 2534.75000  1.10%     -    3s
H    0     0                    2559.0000000 2534.75000  0.95%     -    3s
*    0     0               0    2537.0000000 2537.00000   0.0%     -    3s

Cutting planes:
  Gomory: 1
  Clique: 9
  Zero half: 17

Explored 0 nodes (3119 simplex iterations) in 3.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.537000000000e+03, best bound 2.537000000000e+03, gap 0.0%