Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:06:05 2012

Optimize a model with 7938 rows, 2970 columns and 26568 nonzeros
Presolve removed 1 rows and 54 columns
Presolve time: 0.07s
Presolved: 7937 rows, 2916 columns, 26873 nonzeros
Variable types: 0 continuous, 2916 integer (2916 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 2.000000e+00, 3358 iterations, 0.18 seconds

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

     0     0    2.00000    0  106   30.00000    2.00000  93.3%     -    0s
H    0     0                       9.0000000    2.00000  77.8%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  106    5.00000    2.00000  60.0%     -    1s
H    0     0                       4.0000000    2.00000  50.0%     -    1s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -    3s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -    6s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -    8s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -   10s
     0     0    2.00000    0  106    4.00000    2.00000  50.0%     -   12s
     0     2    2.00000    0  106    4.00000    2.00000  50.0%     -   21s
     1     3    3.00000    1  545    4.00000    2.00000  50.0% 28433   27s
     2     4    3.00000    1  473    4.00000    3.00000  25.0% 19396   30s
    62     2     cutoff    5         4.00000    3.00000  25.0%  1125   35s

Cutting planes:
  Clique: 97
  Zero half: 6

Explored 67 nodes (129548 simplex iterations) in 36.85 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%