Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:59:53 2012

Optimize a model with 13419 rows, 4032 columns and 44037 nonzeros
Presolve time: 0.10s
Presolved: 13419 rows, 4032 columns, 44264 nonzeros
Variable types: 0 continuous, 4032 integer (4032 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 2.000000e+00, 5693 iterations, 0.57 seconds

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

     0     0    2.00000    0  126   40.00000    2.00000  95.0%     -    2s
H    0     0                      14.0000000    2.00000  85.7%     -    2s
H    0     0                       5.0000000    2.00000  60.0%     -    2s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -    3s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -    8s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   13s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   18s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   24s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   29s
     0     2    2.00000    0  126    5.00000    2.00000  60.0%     -   46s
     1     3    3.00000    1  869    5.00000    2.00000  60.0% 54044   63s
     2     4    3.00000    1  556    5.00000    3.00000  40.0% 36652   71s
*   25     6              20       4.0000000    3.00000  25.0%  3409   74s
    27     4 infeasible    3         4.00000    3.00000  25.0%  3242   75s
    32     3     cutoff    5         4.00000    3.00000  25.0%  3269   80s
    39     2     cutoff    4         4.00000    3.00000  25.0%  3118   85s

Cutting planes:
  Clique: 114

Explored 42 nodes (205621 simplex iterations) in 89.41 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%