Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:24:07 2013

Optimize a model with 1009 rows, 18735 columns and 793911 nonzeros
Presolve removed 41 rows and 130 columns
Presolve time: 2.84s
Presolved: 968 rows, 18605 columns, 789975 nonzeros
Variable types: 0 continuous, 18605 integer (18605 binary)
Found heuristic solution: objective 10104.000000

Root relaxation: objective 6.507500e+03, 4271 iterations, 1.46 seconds
Total elapsed time = 5.04s

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

     0     0 6507.50000    0   47 10104.0000 6507.50000  35.6%     -    5s
H    0     0                    7271.0000000 6507.50000  10.5%     -    5s
H    0     0                    7213.0000000 6507.50000  9.78%     -    7s
*    0     0               0    6513.0000000 6513.00000   0.0%     -    8s

Cutting planes:
  Clique: 4
  Zero half: 5

Explored 0 nodes (5343 simplex iterations) in 8.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.513000000000e+03, best bound 6.513000000000e+03, gap 0.0%