Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:26:08 2012

Optimize a model with 21224 rows, 5700 columns and 68998 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.74s
Presolved: 21222 rows, 5698 columns, 68432 nonzeros
Variable types: 0 continuous, 5698 integer (5698 binary)
Found heuristic solution: objective 74.0000000

Root relaxation: objective 2.000000e+00, 4346 iterations, 0.20 seconds

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

     0     0    2.00000    0  150   74.00000    2.00000  97.3%     -    1s
H    0     0                      55.0000000    2.00000  96.4%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    2.66667    0 3851    5.00000    2.66667  46.7%     -   13s
     0     0    2.66667    0 3853    5.00000    2.66667  46.7%     -   15s
     0     0    2.66667    0  485    5.00000    2.66667  46.7%     -   18s
     0     2    2.66667    0  222    5.00000    2.66667  46.7%     -   24s
     1     3    3.00000    1  144    5.00000    2.66667  46.7%  6019   26s
    27    25    4.00000   23  108    5.00000    2.66667  46.7%  1022   31s
*   32     6              27       4.0000000    2.66667  33.3%  1015   32s

Cutting planes:
  Clique: 126
  Zero half: 2

Explored 39 nodes (82099 simplex iterations) in 32.62 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%