Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:18:11 2012

Optimize a model with 7600 rows, 2550 columns and 25150 nonzeros
Presolve time: 0.07s
Presolved: 7600 rows, 2550 columns, 25750 nonzeros
Variable types: 0 continuous, 2550 integer (2550 binary)
Found heuristic solution: objective 33.0000000

Root relaxation: objective 2.000000e+00, 1897 iterations, 0.05 seconds

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

     0     0    2.00000    0  100   33.00000    2.00000  93.9%     -    0s
H    0     0                      10.0000000    2.00000  80.0%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  100    5.00000    2.00000  60.0%     -    0s
     0     0    2.00000    0  100    5.00000    2.00000  60.0%     -    2s
     0     0    2.00000    0  100    5.00000    2.00000  60.0%     -    4s
H    0     0                       4.0000000    2.00000  50.0%     -    4s
     0     0    2.00000    0  100    4.00000    2.00000  50.0%     -    6s
     0     0    2.00000    0  100    4.00000    2.00000  50.0%     -    8s
     0     0    2.00000    0  100    4.00000    2.00000  50.0%     -   10s
     0     2    2.00000    0  100    4.00000    2.00000  50.0%     -   18s
     1     3    2.52000    1  233    4.00000    2.00000  50.0% 14261   20s
    52     4    3.00000    3   88    4.00000    2.53846  36.5%   857   25s

Cutting planes:
  Clique: 87

Explored 75 nodes (96000 simplex iterations) in 25.74 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%