Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:16:29 2013

Optimize a model with 985 rows, 15695 columns and 776058 nonzeros
Presolve removed 8 rows and 7 columns (presolve time = 5s) ...
Presolve removed 17 rows and 25 columns (presolve time = 10s) ...
Presolve removed 59 rows and 272 columns
Presolve time: 14.46s
Presolved: 926 rows, 15423 columns, 758499 nonzeros
Variable types: 0 continuous, 15423 integer (15423 binary)
Found heuristic solution: objective 9006.0000000

Root relaxation: objective 6.648750e+03, 5053 iterations, 1.70 seconds

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

     0     0 6648.75000    0   47 9006.00000 6648.75000  26.2%     -   16s
H    0     0                    7267.0000000 6648.75000  8.51%     -   17s
*    0     0               0    6658.0000000 6658.00000   0.0%     -   20s

Cutting planes:
  Clique: 7
  Zero half: 2

Explored 0 nodes (6121 simplex iterations) in 20.40 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.657999999971e+03, best bound 6.657999999971e+03, gap 0.0%