Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:53:14 2012

Optimize a model with 8851 rows, 2862 columns and 29203 nonzeros
Presolve time: 0.08s
Presolved: 8851 rows, 2862 columns, 29572 nonzeros
Variable types: 0 continuous, 2862 integer (2862 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: objective 2.000000e+00, 3815 iterations, 0.22 seconds

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

     0     0    2.00000    0  106   31.00000    2.00000  93.5%     -    1s
H    0     0                      11.0000000    2.00000  81.8%     -    1s
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%     -    4s
     0     0    2.00000    0  106    5.00000    2.00000  60.0%     -    6s
     0     0    2.00000    0  106    5.00000    2.00000  60.0%     -    9s
H    0     0                       4.0000000    2.00000  50.0%     -   10s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -   12s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -   15s
     0     2    2.00000    0  106    4.00000    2.00000  50.0%     -   21s
     1     3    3.00000    1  698    4.00000    2.00000  50.0% 28532   27s
     2     4    3.00000    1  658    4.00000    3.00000  25.0% 21084   32s
    10     4    3.00000    2  174    4.00000    3.00000  25.0%  5346   35s

Cutting planes:
  Clique: 96

Explored 37 nodes (126040 simplex iterations) in 39.66 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%