Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:03 2012

Optimize a model with 159 rows, 76 columns and 318 nonzeros
Presolve removed 36 rows and 7 columns
Presolve time: 0.00s
Presolved: 123 rows, 69 columns, 257 nonzeros
Variable types: 0 continuous, 69 integer (69 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.550000e+01, 83 iterations, 0.00 seconds

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

     0     0   35.50000    0   51   30.00000   35.50000  18.3%     -    0s
H    0     0                      31.0000000   35.50000  14.5%     -    0s
     0     0   35.00000    0   58   31.00000   35.00000  12.9%     -    0s
H    0     0                      32.0000000   35.00000  9.38%     -    0s
     0     0   34.60000    0   61   32.00000   34.60000  8.12%     -    0s
     0     0   34.50000    0   68   32.00000   34.50000  7.81%     -    0s
     0     0   34.22222    0   61   32.00000   34.22222  6.94%     -    0s
H    0     0                      33.0000000   34.22222  3.70%     -    0s
     0     0   34.00000    0   66   33.00000   34.00000  3.03%     -    0s
     0     0     cutoff    0        33.00000   33.99997  3.03%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 20

Explored 0 nodes (269 simplex iterations) in 0.02 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%