Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:14:07 2012

Optimize a model with 7300 rows, 2550 columns and 24250 nonzeros
Presolve time: 0.06s
Presolved: 7300 rows, 2550 columns, 24699 nonzeros
Variable types: 0 continuous, 2550 integer (2550 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 2.000000e+00, 2546 iterations, 0.08 seconds

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

     0     0    2.00000    0  100   30.00000    2.00000  93.3%     -    0s
H    0     0                      13.0000000    2.00000  84.6%     -    0s
H    0     0                       4.0000000    2.00000  50.0%     -    0s
     0     0    2.00000    0  100    4.00000    2.00000  50.0%     -    1s
     0     0    2.00000    0  100    4.00000    2.00000  50.0%     -    3s
     0     0    2.00000    0  100    4.00000    2.00000  50.0%     -    5s
     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     2    2.00000    0  100    4.00000    2.00000  50.0%     -   16s
     2     4    3.00000    1  139    4.00000    3.00000  25.0% 13044   22s
    16     2     cutoff    5         4.00000    3.00000  25.0%  2750   25s

Cutting planes:
  Clique: 102

Explored 65 nodes (106559 simplex iterations) in 28.83 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%