Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:51:30 2012

Optimize a model with 8215 rows, 2862 columns and 27295 nonzeros
Presolve time: 0.07s
Presolved: 8215 rows, 2862 columns, 27679 nonzeros
Variable types: 0 continuous, 2862 integer (2862 binary)
Found heuristic solution: objective 32.0000000

Root relaxation: objective 2.000000e+00, 5125 iterations, 0.60 seconds

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

     0     0    2.00000    0  106   32.00000    2.00000  93.8%     -    0s
H    0     0                      10.0000000    2.00000  80.0%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    2.00000    0  106    5.00000    2.00000  60.0%     -    1s
     0     0    2.00000    0  106    5.00000    2.00000  60.0%     -    1s
     0     0    2.00000    0  106    5.00000    2.00000  60.0%     -    2s
H    0     0                       4.0000000    2.00000  50.0%     -    2s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -    2s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -    2s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -    2s
     0     2    2.00000    0  106    4.00000    2.00000  50.0%     -    3s
     1     3    2.50000    1  225    4.00000    2.00908  49.8%  7968    5s
    26     4     cutoff    7         4.00000    2.66667  33.3%  1227   10s
    53     3    3.00000    3  232    4.00000    3.00000  25.0%  1090   15s

Cutting planes:
  Clique: 26

Explored 63 nodes (77825 simplex iterations) in 16.77 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%