Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:36:47 2012

Optimize a model with 18359 rows, 5256 columns and 59974 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.66s
Presolved: 18357 rows, 5254 columns, 59464 nonzeros
Variable types: 0 continuous, 5254 integer (5254 binary)
Found heuristic solution: objective 72.0000000

Root relaxation: objective 2.000000e+00, 3725 iterations, 0.14 seconds

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

     0     0    2.00000    0  144   72.00000    2.00000  97.2%     -    1s
H    0     0                      63.0000000    2.00000  96.8%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 3521    5.00000    3.00000  40.0%     -    9s
     0     0    3.00000    0 3521    5.00000    3.00000  40.0%     -   17s
     0     2    3.00000    0 3521    5.00000    3.00000  40.0%     -   36s
*   24     6              19       4.0000000    3.00000  25.0%  1166   37s

Cutting planes:
  Clique: 40
  Zero half: 5

Explored 25 nodes (83432 simplex iterations) in 40.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%