Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:44:56 2012

Optimize a model with 7955 rows, 2756 columns and 26362 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.15s
Presolved: 8005 rows, 2754 columns, 28760 nonzeros
Variable types: 0 continuous, 2754 integer (2754 binary)
Found heuristic solution: objective 52.0000000

Root relaxation: objective 2.000000e+00, 1973 iterations, 0.05 seconds

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

     0     0    2.00000    0  104   52.00000    2.00000  96.2%     -    0s
H    0     0                      33.0000000    2.00000  93.9%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0  250    5.00000    2.66667  46.7%     -    0s
     0     0    2.68027    0 2543    5.00000    2.68027  46.4%     -    1s
     0     0    2.68027    0 2531    5.00000    2.68027  46.4%     -    2s
     0     0    2.68027    0 2539    5.00000    2.68027  46.4%     -    2s
     0     0    2.68027    0 2368    5.00000    2.68027  46.4%     -    4s
     0     0    2.68027    0 2369    5.00000    2.68027  46.4%     -    5s
     0     0    2.68027    0 2381    5.00000    2.68027  46.4%     -    6s
     0     0    2.68027    0 2391    5.00000    2.68027  46.4%     -    7s
     0     0    2.68027    0 2391    5.00000    2.68027  46.4%     -    8s
     0     2    3.00000    0 2391    5.00000    3.00000  40.0%     -   11s
*    6     4               6       4.0000000    3.00000  25.0%  1625   13s

Cutting planes:
  Clique: 164
  Zero half: 5

Explored 13 nodes (35892 simplex iterations) in 13.71 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%