Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:55 2012

Optimize a model with 569 rows, 107 columns and 1138 nonzeros
Presolve removed 210 rows and 0 columns
Presolve time: 0.00s
Presolved: 359 rows, 107 columns, 895 nonzeros
Variable types: 0 continuous, 107 integer (107 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.811964e+01, 240 iterations, 0.00 seconds

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

     0     0   38.11964    0  107   27.00000   38.11964  41.2%     -    0s
H    0     0                      29.0000000   38.11964  31.4%     -    0s
     0     0   37.86484    0  103   29.00000   37.86484  30.6%     -    0s
H    0     0                      30.0000000   37.86484  26.2%     -    0s
     0     0   37.37592    0  106   30.00000   37.37592  24.6%     -    0s
     0     0   37.13277    0  106   30.00000   37.13277  23.8%     -    0s
H    0     0                      31.0000000   37.13277  19.8%     -    0s
     0     0   36.97581    0  104   31.00000   36.97581  19.3%     -    0s
     0     0   36.63215    0  103   31.00000   36.63215  18.2%     -    0s
     0     0   36.37324    0  105   31.00000   36.37324  17.3%     -    0s
     0     0   36.22122    0  106   31.00000   36.22122  16.8%     -    0s
     0     0   36.15701    0  104   31.00000   36.15701  16.6%     -    0s
     0     0   36.11693    0  105   31.00000   36.11693  16.5%     -    0s
     0     0   36.11212    0  105   31.00000   36.11212  16.5%     -    0s
     0     0   36.11212    0  104   31.00000   36.11212  16.5%     -    0s
     0     2   36.10539    0  104   31.00000   36.10539  16.5%     -    0s

Cutting planes:
  Clique: 1
  Zero half: 51

Explored 357 nodes (10268 simplex iterations) in 0.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%