Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:08:39 2013

Optimize a model with 4991 rows, 961 columns and 15376 nonzeros
Presolve removed 532 rows and 476 columns
Presolve time: 0.04s
Presolved: 4459 rows, 485 columns, 13992 nonzeros
Variable types: 22 continuous, 463 integer (463 binary)
Found heuristic solution: objective 18796.000000
Found heuristic solution: objective 17233.000000

Root relaxation: objective 1.228470e+04, 4770 iterations, 0.15 seconds

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

     0     0 12284.6957    0    9 17233.0000 12284.6957  28.7%     -    0s
H    0     0                    12302.000000 12284.6957  0.14%     -    0s
H    0     0                    12301.000000 12284.6957  0.13%     -    0s
H    0     0                    12289.000000 12284.6957  0.04%     -    0s
     0     0 12285.0000    0   19 12289.0000 12285.0000  0.03%     -    0s
     0     0 12285.0000    0   10 12289.0000 12285.0000  0.03%     -    0s
     0     0 12285.0000    0   20 12289.0000 12285.0000  0.03%     -    0s
     0     1 12285.0000    0   19 12289.0000 12285.0000  0.03%     -    0s
H    1     1                    12287.000000 12285.0000  0.02%  39.0    0s

Cutting planes:
  Gomory: 6
  Cover: 6
  Implied bound: 5
  Clique: 8
  MIR: 8
  GUB cover: 2
  Zero half: 15

Explored 5 nodes (5527 simplex iterations) in 0.33 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.228700000000e+04, best bound 1.228700000000e+04, gap 0.0%