Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:20:39 2013

Optimize a model with 1230 rows, 22132 columns and 1230716 nonzeros
Presolve removed 31 rows and 0 columns
Presolve time: 1.14s
Presolved: 1199 rows, 22132 columns, 1229516 nonzeros
Variable types: 0 continuous, 22132 integer (22132 binary)
Found heuristic solution: objective 9754.0000000

Root relaxation: objective 8.484333e+03, 6445 iterations, 3.08 seconds

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

     0     0 8484.33333    0   53 9754.00000 8484.33333  13.0%     -    4s
H    0     0                    8554.0000000 8484.33333  0.81%     -    6s
*    0     0               0    8489.0000000 8489.00000   0.0%     -    7s

Cutting planes:
  Clique: 3
  Zero half: 36

Explored 0 nodes (8022 simplex iterations) in 7.62 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.489000000000e+03, best bound 8.489000000000e+03, gap 0.0%