Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:15:34 2013

Optimize a model with 828 rows, 12335 columns and 520315 nonzeros
Presolve removed 22 rows and 100 columns
Presolve time: 2.78s
Presolved: 806 rows, 12235 columns, 515861 nonzeros
Variable types: 0 continuous, 12235 integer (12235 binary)
Found heuristic solution: objective 5587.0000000

Root relaxation: objective 4.377000e+03, 2391 iterations, 0.56 seconds

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

     0     0 4377.00000    0   59 5587.00000 4377.00000  21.7%     -    3s
H    0     0                    4474.0000000 4377.00000  2.17%     -    3s
*    0     0               0    4385.0000000 4385.00000   0.0%     -    4s

Cutting planes:
  Clique: 4
  Zero half: 32

Explored 0 nodes (2847 simplex iterations) in 4.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.385000000000e+03, best bound 4.385000000000e+03, gap 0.0%