Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:12:57 2012

Optimize a model with 16329 rows, 5112 columns and 53745 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.56s
Presolved: 16398 rows, 5110 columns, 58326 nonzeros
Variable types: 0 continuous, 5110 integer (5110 binary)
Found heuristic solution: objective 71.0000000

Root relaxation: objective 2.000000e+00, 3713 iterations, 0.15 seconds

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

     0     0    2.00000    0  142   71.00000    2.00000  97.2%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    2.66667    0 2222    5.00000    2.66667  46.7%     -    7s
     0     0    2.66990    0 4448    5.00000    2.66990  46.6%     -    8s
     0     0    2.66990    0 4453    5.00000    2.66990  46.6%     -   10s
     0     0    2.66990    0 4032    5.00000    2.66990  46.6%     -   12s
     0     0    2.66990    0 4071    5.00000    2.66990  46.6%     -   13s
     0     0    2.66990    0 4000    5.00000    2.66990  46.6%     -   15s
     0     0    2.66990    0 4010    5.00000    2.66990  46.6%     -   16s
     0     0    2.66990    0 4023    5.00000    2.66990  46.6%     -   17s
     0     0    2.66990    0 4067    5.00000    2.66990  46.6%     -   18s
     0     0    2.66990    0 4067    5.00000    2.66990  46.6%     -   18s
     0     2    2.80000    0 4067    5.00000    2.80000  44.0%     -   32s
*   31     4              23       4.0000000    3.00000  25.0%   291   34s
    35     0     cutoff    1         4.00000    4.00000   0.0%   391   35s

Cutting planes:
  Clique: 107
  Zero half: 4

Explored 36 nodes (63056 simplex iterations) in 35.94 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%