Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:50 2012

Optimize a model with 561 rows, 106 columns and 1122 nonzeros
Presolve removed 211 rows and 0 columns
Presolve time: 0.00s
Presolved: 350 rows, 106 columns, 882 nonzeros
Variable types: 0 continuous, 106 integer (106 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.860550e+01, 235 iterations, 0.01 seconds

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

     0     0   38.60550    0  105   30.00000   38.60550  28.7%     -    0s
H    0     0                      31.0000000   38.60550  24.5%     -    0s
     0     0   38.09311    0  106   31.00000   38.09311  22.9%     -    0s
     0     0   37.70954    0  103   31.00000   37.70954  21.6%     -    0s
H    0     0                      32.0000000   37.70954  17.8%     -    0s
     0     0   37.29413    0  102   32.00000   37.29413  16.5%     -    0s
     0     0   37.11968    0  103   32.00000   37.11968  16.0%     -    0s
     0     0   37.00869    0  104   32.00000   37.00869  15.7%     -    0s
     0     0   36.99744    0  102   32.00000   36.99744  15.6%     -    0s
     0     0   36.98673    0  104   32.00000   36.98673  15.6%     -    0s
     0     0   36.98673    0  104   32.00000   36.98673  15.6%     -    0s
     0     2   36.98463    0  104   32.00000   36.98463  15.6%     -    0s
H   13     7                      33.0000000   36.98320  12.1%  34.0    0s

Cutting planes:
  Clique: 6
  Zero half: 38

Explored 137 nodes (4637 simplex iterations) in 0.22 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%