Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:36:18 2012

Optimize a model with 11656 rows, 3906 columns and 38626 nonzeros
Presolve time: 0.10s
Presolved: 11656 rows, 3906 columns, 38925 nonzeros
Variable types: 0 continuous, 3906 integer (3906 binary)
Found heuristic solution: objective 39.0000000

Root relaxation: objective 2.000000e+00, 5396 iterations, 0.55 seconds

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

     0     0    2.00000    0  124   39.00000    2.00000  94.9%     -    3s
H    0     0                      14.0000000    2.00000  85.7%     -    3s
H    0     0                       5.0000000    2.00000  60.0%     -    3s
     0     0    2.00000    0  124    5.00000    2.00000  60.0%     -    3s
     0     0    2.00000    0  124    5.00000    2.00000  60.0%     -    8s
     0     0    2.00000    0  124    5.00000    2.00000  60.0%     -   12s
     0     0    2.00000    0  124    5.00000    2.00000  60.0%     -   16s
     0     0    2.00000    0  124    5.00000    2.00000  60.0%     -   22s
     0     0    2.00000    0  124    5.00000    2.00000  60.0%     -   26s
     0     2    2.00000    0  124    5.00000    2.00000  60.0%     -   40s
     1     3    2.50000    1  545    5.00000    2.00000  60.0% 28711   47s
     2     4    2.50000    1  822    5.00000    2.50000  50.0% 24798   55s
H   27    13                       4.0000000    2.50000  37.5%  2037   56s
    54    13    2.66667    3  278    4.00000    2.50000  37.5%  1240   60s
   111    16    2.50000    3  170    4.00000    2.50000  37.5%   836   65s

Cutting planes:
  Clique: 120

Explored 185 nodes (172585 simplex iterations) in 66.94 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%