Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:53:54 2012

Optimize a model with 8426 rows, 2862 columns and 27876 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.17s
Presolved: 8424 rows, 2860 columns, 27558 nonzeros
Variable types: 0 continuous, 2860 integer (2860 binary)
Found heuristic solution: objective 52.0000000

Root relaxation: objective 2.000000e+00, 2151 iterations, 0.06 seconds

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

     0     0    2.00000    0  106   52.00000    2.00000  96.2%     -    0s
H    0     0                      48.0000000    2.00000  95.8%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0  144    5.00000    2.66667  46.7%     -    1s
     0     0    2.67105    0 2591    5.00000    2.67105  46.6%     -    1s
     0     0    2.67105    0 2590    5.00000    2.67105  46.6%     -    2s
     0     0    2.67105    0 2596    5.00000    2.67105  46.6%     -    2s
     0     0    2.67105    0 2291    5.00000    2.67105  46.6%     -    3s
     0     0    2.67105    0 2338    5.00000    2.67105  46.6%     -    4s
     0     0    2.67105    0 2342    5.00000    2.67105  46.6%     -    4s
     0     0    2.67105    0 2391    5.00000    2.67105  46.6%     -    5s
     0     0    2.67105    0 2411    5.00000    2.67105  46.6%     -    6s
     0     0    2.67105    0 2359    5.00000    2.67105  46.6%     -    6s
     0     2    3.00000    0 2359    5.00000    3.00000  40.0%     -    8s
*   16     4              12       4.0000000    4.00000   0.0%   378    9s

Cutting planes:
  Clique: 74
  Zero half: 5

Explored 17 nodes (27175 simplex iterations) in 9.69 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%