Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:07:45 2012

Optimize a model with 15342 rows, 4556 columns and 50248 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.49s
Presolved: 15407 rows, 4554 columns, 54279 nonzeros
Variable types: 0 continuous, 4554 integer (4554 binary)
Found heuristic solution: objective 66.0000000

Root relaxation: objective 2.000000e+00, 3505 iterations, 0.14 seconds

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

     0     0    2.00000    0  134   66.00000    2.00000  97.0%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 3106    5.00000    3.00000  40.0%     -    4s
     0     0    3.00000    0 3106    5.00000    3.00000  40.0%     -   11s
     0     2    3.00000    0 3106    5.00000    3.00000  40.0%     -   23s
     3     5    3.00000    3  159    5.00000    3.00000  40.0%  7709   25s
*   26     6              19       4.0000000    3.00000  25.0%  1073   25s

Cutting planes:
  Clique: 41
  Zero half: 1

Explored 27 nodes (67885 simplex iterations) in 29.20 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%