Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:07:33 2012

Optimize a model with 12078 rows, 3782 columns and 39772 nonzeros
Presolve time: 0.09s
Presolved: 12078 rows, 3782 columns, 39992 nonzeros
Variable types: 0 continuous, 3782 integer (3782 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 2.000000e+00, 3587 iterations, 0.14 seconds

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

     0     0    2.00000    0  122   36.00000    2.00000  94.4%     -    0s
H    0     0                      12.0000000    2.00000  83.3%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  122    5.00000    2.00000  60.0%     -    1s
H    0     0                       4.0000000    2.00000  50.0%     -    1s
     0     0    2.00000    0  122    4.00000    2.00000  50.0%     -    6s
     0     0    2.00000    0  122    4.00000    2.00000  50.0%     -   11s
     0     0    2.00000    0  122    4.00000    2.00000  50.0%     -   16s
     0     0    2.00000    0  122    4.00000    2.00000  50.0%     -   19s
     0     0    2.00000    0  122    4.00000    2.00000  50.0%     -   22s
     0     2    2.00000    0  122    4.00000    2.00000  50.0%     -   41s
     1     3    2.50000    1  215    4.00000    2.00000  50.0% 24537   47s
     2     4    2.50000    1  121    4.00000    2.50000  37.5% 21828   54s
     3     5    2.66667    2  163    4.00000    2.50000  37.5% 15440   55s
    31    13    3.00000    5  114    4.00000    2.50000  37.5%  1995   60s
    72    14    3.00000    4  120    4.00000    2.60000  35.0%  1138   65s

Cutting planes:
  Clique: 204

Explored 181 nodes (171878 simplex iterations) in 68.79 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%