Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:05:32 2012

Optimize a model with 18215 rows, 4830 columns and 59131 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.60s
Presolved: 18213 rows, 4828 columns, 58603 nonzeros
Variable types: 0 continuous, 4828 integer (4828 binary)
Found heuristic solution: objective 69.0000000

Root relaxation: objective 2.000000e+00, 3344 iterations, 0.13 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                      66.0000000    2.00000  97.0%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 2556    5.00000    3.00000  40.0%     -    8s
     0     0    3.00000    0 2535    5.00000    3.00000  40.0%     -   10s
     0     0    3.00752    0 3673    5.00000    3.00752  39.8%     -   12s
     0     0    3.00752    0 3685    5.00000    3.00752  39.8%     -   14s
     0     0    3.00752    0 3686    5.00000    3.00752  39.8%     -   23s
     0     0    3.00752    0 3691    5.00000    3.00752  39.8%     -   31s
     0     0    3.00752    0 3689    5.00000    3.00752  39.8%     -   37s
     0     0    3.00752    0 3686    5.00000    3.00752  39.8%     -   46s
     0     0    3.00752    0 3686    5.00000    3.00752  39.8%     -   55s
     0     2    3.50000    0 3686    5.00000    3.50000  30.0%     -   72s
     8     8    4.00000    6  130    5.00000    4.00000  20.0%  3659   75s
*   26     3              19       4.0000000    4.00000   0.0%  1570   76s

Cutting planes:
  Clique: 55
  Zero half: 4

Explored 27 nodes (184213 simplex iterations) in 76.52 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%