Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:45 2012

Optimize a model with 612 rows, 111 columns and 1224 nonzeros
Presolve removed 239 rows and 0 columns
Presolve time: 0.00s
Presolved: 373 rows, 111 columns, 943 nonzeros
Variable types: 0 continuous, 111 integer (111 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.755556e+01, 254 iterations, 0.00 seconds

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

     0     0   37.55556    0  101   30.00000   37.55556  25.2%     -    0s
     0     0   37.26667    0  105   30.00000   37.26667  24.2%     -    0s
     0     0   36.97774    0  105   30.00000   36.97774  23.3%     -    0s
     0     0   36.90667    0  107   30.00000   36.90667  23.0%     -    0s
     0     0   36.65049    0  106   30.00000   36.65049  22.2%     -    0s
     0     0   36.53937    0  104   30.00000   36.53937  21.8%     -    0s
     0     0   36.33850    0  108   30.00000   36.33850  21.1%     -    0s
     0     0   36.33228    0  107   30.00000   36.33228  21.1%     -    0s
     0     0   36.32057    0  107   30.00000   36.32057  21.1%     -    0s
     0     0   36.32057    0  106   30.00000   36.32057  21.1%     -    0s
H    0     0                      31.0000000   36.32057  17.2%     -    0s
     0     2   36.32057    0  106   31.00000   36.32057  17.2%     -    0s
H    6     6                      33.0000000   36.01015  9.12%  60.0    0s

Cutting planes:
  Gomory: 1
  Clique: 2
  Zero half: 37

Explored 72 nodes (3345 simplex iterations) in 0.17 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%