Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:33:40 2012

Optimize a model with 7696 rows, 2756 columns and 25636 nonzeros
Presolve time: 0.07s
Presolved: 7696 rows, 2756 columns, 26098 nonzeros
Variable types: 0 continuous, 2756 integer (2756 binary)
Found heuristic solution: objective 35.0000000

Root relaxation: objective 2.000000e+00, 2734 iterations, 0.09 seconds

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

     0     0    2.00000    0  104   35.00000    2.00000  94.3%     -    0s
H    0     0                      13.0000000    2.00000  84.6%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  104    5.00000    2.00000  60.0%     -    1s
H    0     0                       4.0000000    2.00000  50.0%     -    1s
     0     0    2.00000    0  104    4.00000    2.00000  50.0%     -    3s
     0     0    2.00000    0  104    4.00000    2.00000  50.0%     -    5s
     0     0    2.00000    0  104    4.00000    2.00000  50.0%     -    7s
     0     0    2.00000    0  104    4.00000    2.00000  50.0%     -    9s
     0     2    2.00000    0  104    4.00000    2.00000  50.0%     -   17s
     2     4    2.50000    1  101    4.00000    2.50000  37.5% 11270   22s
    27    11     cutoff    8         4.00000    2.50000  37.5%  1481   25s
   122    11     cutoff    7         4.00000    3.00000  25.0%   594   30s

Cutting planes:
  Clique: 111

Explored 172 nodes (124258 simplex iterations) in 31.01 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%