Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:03:26 2012

Optimize a model with 15342 rows, 4556 columns and 50248 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.48s
Presolved: 15340 rows, 4554 columns, 49790 nonzeros
Variable types: 0 continuous, 4554 integer (4554 binary)
Found heuristic solution: objective 67.0000000

Root relaxation: objective 2.000000e+00, 3226 iterations, 0.11 seconds

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

     0     0    2.00000    0  134   67.00000    2.00000  97.0%     -    0s
H    0     0                      61.0000000    2.00000  96.7%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 1024    5.00000    3.00000  40.0%     -    8s
     0     0    3.00775    0 3097    5.00000    3.00775  39.8%     -   10s
     0     0    3.00775    0 3155    5.00000    3.00775  39.8%     -   12s
     0     0    3.00775    0 3158    5.00000    3.00775  39.8%     -   18s
     0     0    3.00775    0 3158    5.00000    3.00775  39.8%     -   24s
     0     0    3.00775    0 3158    5.00000    3.00775  39.8%     -   29s
     0     2    3.33333    0 3158    5.00000    3.33333  33.3%     -   42s
*   26     2              21       4.0000000    4.00000   0.0%   889   43s

Cutting planes:
  Clique: 40
  Zero half: 2

Explored 27 nodes (118219 simplex iterations) in 43.40 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%