Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:04:14 2012

Optimize a model with 16835 rows, 4830 columns and 54991 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.56s
Presolved: 16833 rows, 4828 columns, 54503 nonzeros
Variable types: 0 continuous, 4828 integer (4828 binary)
Found heuristic solution: objective 69.0000000

Root relaxation: objective 2.000000e+00, 3902 iterations, 0.16 seconds

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

     0     0    2.00000    0  138   69.00000    2.00000  97.1%     -    1s
H    0     0                      61.0000000    2.00000  96.7%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 3113    5.00000    3.00000  40.0%     -    5s
     0     0    3.00000    0 3060    5.00000    3.00000  40.0%     -    8s
     0     0    3.00000    0 3075    5.00000    3.00000  40.0%     -   10s
     0     0    3.00000    0 3073    5.00000    3.00000  40.0%     -   16s
     0     0    3.00752    0 3357    5.00000    3.00752  39.8%     -   22s
H    0     0                       4.0000000    3.00752  24.8%     -   22s

Cutting planes:
  Clique: 52
  Zero half: 7

Explored 0 nodes (72003 simplex iterations) in 22.72 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%