Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:24:17 2013

Optimize a model with 1045 rows, 19727 columns and 881355 nonzeros
Presolve removed 8 rows and 11 columns (presolve time = 6s) ...
Presolve removed 8 rows and 11 columns
Presolve time: 5.87s
Presolved: 1037 rows, 19716 columns, 880592 nonzeros
Variable types: 0 continuous, 19716 integer (19716 binary)
Found heuristic solution: objective 13009.000000
Found heuristic solution: objective 10258.000000

Root relaxation: objective 7.058105e+03, 5373 iterations, 2.23 seconds

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

     0     0 7058.10526    0   94 10258.0000 7058.10526  31.2%     -    8s
H    0     0                    7319.0000000 7058.10526  3.56%     -    8s
     0     0 7080.28571    0   85 7319.00000 7080.28571  3.26%     -   10s
     0     0 7080.28571    0   70 7319.00000 7080.28571  3.26%     -   20s
*    0     0               0    7081.0000000 7081.00000   0.0%     -   21s

Cutting planes:
  Clique: 6
  Zero half: 10

Explored 0 nodes (11797 simplex iterations) in 21.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.081000000000e+03, best bound 7.081000000000e+03, gap 0.0%