Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:12:31 2013

Optimize a model with 908 rows, 12034 columns and 655643 nonzeros
Presolve removed 14 rows and 26 columns
Presolve time: 4.90s
Presolved: 894 rows, 12008 columns, 653999 nonzeros
Variable types: 0 continuous, 12008 integer (12008 binary)
Found heuristic solution: objective 7980.0000000
Found heuristic solution: objective 6797.0000000

Root relaxation: objective 5.493250e+03, 3128 iterations, 0.81 seconds

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

     0     0 5493.25000    0   40 6797.00000 5493.25000  19.2%     -    5s
H    0     0                    5694.0000000 5493.25000  3.53%     -    6s
     0     0 5513.00000    0    6 5694.00000 5513.00000  3.18%     -    6s
*    0     0               0    5513.0000000 5513.00000   0.0%     -    6s

Cutting planes:
  Clique: 3
  Zero half: 2

Explored 0 nodes (3232 simplex iterations) in 6.91 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.513000000000e+03, best bound 5.513000000000e+03, gap 0.0%