Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:11:25 2012

Optimize a model with 8549 rows, 3306 columns and 28669 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.19s
Presolved: 8604 rows, 3304 columns, 31618 nonzeros
Variable types: 0 continuous, 3304 integer (3304 binary)
Found heuristic solution: objective 57.0000000

Root relaxation: objective 2.000000e+00, 2407 iterations, 0.07 seconds

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

     0     0    2.00000    0  114   57.00000    2.00000  96.5%     -    0s
H    0     0                       4.0000000    2.00000  50.0%     -    0s
     0     0    2.66667    0  195    4.00000    2.66667  33.3%     -    1s
     0     0    2.67485    0 2540    4.00000    2.67485  33.1%     -    1s
     0     0    2.67485    0 2544    4.00000    2.67485  33.1%     -    3s
     0     0    2.67485    0 2225    4.00000    2.67485  33.1%     -    7s
     0     0    2.67485    0 2222    4.00000    2.67485  33.1%     -   10s
     0     0    2.67485    0 2225    4.00000    2.67485  33.1%     -   13s
     0     0    2.67485    0 2230    4.00000    2.67485  33.1%     -   16s
     0     0    2.67485    0 2288    4.00000    2.67485  33.1%     -   18s
     0     0    2.67485    0 2277    4.00000    2.67485  33.1%     -   21s
     0     0    2.67485    0 2201    4.00000    2.67485  33.1%     -   25s
     0     0    2.67485    0 2326    4.00000    2.67485  33.1%     -   28s
     0     0    2.67485    0 2326    4.00000    2.67485  33.1%     -   30s
     0     1    3.00000    0 2326    4.00000    3.00000  25.0%     -   39s
     1     2    3.00000    1  133    4.00000    3.00000  25.0%  6996   40s

Cutting planes:
  Clique: 48
  Zero half: 17

Explored 8 nodes (128740 simplex iterations) in 41.04 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%