Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:54 2012

Optimize a model with 353 rows, 86 columns and 706 nonzeros
Presolve removed 114 rows and 0 columns
Presolve time: 0.00s
Presolved: 239 rows, 86 columns, 564 nonzeros
Variable types: 0 continuous, 86 integer (86 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.367742e+01, 163 iterations, 0.00 seconds

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

     0     0   33.67742    0   85   27.00000   33.67742  24.7%     -    0s
H    0     0                      29.0000000   33.67742  16.1%     -    0s
     0     0   33.00000    0   82   29.00000   33.00000  13.8%     -    0s
H    0     0                      31.0000000   33.00000  6.45%     -    0s
     0     0   32.94286    0   82   31.00000   32.94286  6.27%     -    0s
     0     0   32.43163    0   82   31.00000   32.43163  4.62%     -    0s
     0     0   32.16667    0   80   31.00000   32.16667  3.76%     -    0s
     0     0   32.08247    0   82   31.00000   32.08247  3.49%     -    0s
     0     0     cutoff    0        31.00000   31.99997  3.23%     -    0s

Cutting planes:
  Zero half: 84

Explored 0 nodes (440 simplex iterations) in 0.04 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%