Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:02:31 2012

Optimize a model with 12479 rows, 4290 columns and 41403 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.37s
Presolved: 12477 rows, 4288 columns, 41019 nonzeros
Variable types: 0 continuous, 4288 integer (4288 binary)
Found heuristic solution: objective 65.0000000

Root relaxation: objective 2.000000e+00, 2826 iterations, 0.09 seconds

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

     0     0    2.00000    0  130   65.00000    2.00000  96.9%     -    0s
H    0     0                      51.0000000    2.00000  96.1%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0 1967    5.00000    2.66667  46.7%     -    2s
H    0     0                       4.0000000    2.66667  33.3%     -    5s
     0     0    2.67021    0 3442    4.00000    2.67021  33.2%     -    6s
     0     0    2.67021    0 2980    4.00000    2.67021  33.2%     -   11s
     0     2    2.80000    0 2980    4.00000    2.80000  30.0%     -   14s
    12     0     cutoff    1         4.00000    4.00000   0.0%  1249   16s

Cutting planes:
  Clique: 52
  Zero half: 1

Explored 13 nodes (43658 simplex iterations) in 16.39 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%