Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:29:37 2012

Optimize a model with 8305 rows, 3080 columns and 27775 nonzeros
Presolve time: 0.07s
Presolved: 8305 rows, 3080 columns, 28087 nonzeros
Variable types: 0 continuous, 3080 integer (3080 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 2.000000e+00, 3280 iterations, 0.12 seconds

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

     0     0    2.00000    0  110   30.00000    2.00000  93.3%     -    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  110    5.00000    2.00000  60.0%     -    1s
     0     0    2.00000    0  110    5.00000    2.00000  60.0%     -    4s
     0     0    2.00000    0  110    5.00000    2.00000  60.0%     -    6s
H    0     0                       4.0000000    2.00000  50.0%     -    7s
     0     0    2.00000    0  110    4.00000    2.00000  50.0%     -    9s
     0     0    2.00000    0  110    4.00000    2.00000  50.0%     -   11s
     0     0    2.00000    0  110    4.00000    2.00000  50.0%     -   14s
     0     2    2.00000    0  110    4.00000    2.00000  50.0%     -   26s
     1     3    2.50000    1  176    4.00000    2.00000  50.0% 31875   33s
     2     4    3.00000    1  510    4.00000    2.50000  37.5% 20590   36s
    40    12     cutoff    7         4.00000    3.00000  25.0%  1556   40s
   140    13     cutoff    8         4.00000    3.00000  25.0%   718   45s
   168    13     cutoff   11         4.00000    3.00000  25.0%   781   50s

Cutting planes:
  Clique: 127

Explored 234 nodes (216337 simplex iterations) in 53.94 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%