Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:52 2012

Optimize a model with 546 rows, 106 columns and 1092 nonzeros
Presolve removed 192 rows and 1 columns
Presolve time: 0.00s
Presolved: 354 rows, 105 columns, 866 nonzeros
Variable types: 0 continuous, 105 integer (105 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.801449e+01, 221 iterations, 0.00 seconds

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

     0     0   38.01449    0   98   27.00000   38.01449  40.8%     -    0s
H    0     0                      31.0000000   38.01449  22.6%     -    0s
     0     0   37.27778    0   97   31.00000   37.27778  20.3%     -    0s
     0     0   36.94111    0  101   31.00000   36.94111  19.2%     -    0s
     0     0   36.66275    0  101   31.00000   36.66275  18.3%     -    0s
     0     0   36.50696    0  105   31.00000   36.50696  17.8%     -    0s
     0     0   36.40230    0  105   31.00000   36.40230  17.4%     -    0s
     0     0   36.37931    0  105   31.00000   36.37931  17.4%     -    0s
     0     0   36.22745    0  102   31.00000   36.22745  16.9%     -    0s
     0     0   36.22437    0  103   31.00000   36.22437  16.9%     -    0s
     0     0   36.22437    0  102   31.00000   36.22437  16.9%     -    0s
     0     2   36.22223    0  102   31.00000   36.22223  16.8%     -    0s
*   14    10               9      32.0000000   36.22223  13.2%  41.6    0s
H   58    12                      33.0000000   35.26923  6.88%  31.1    0s

Cutting planes:
  Clique: 2
  Zero half: 40

Explored 94 nodes (3261 simplex iterations) in 0.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%