Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:01 2012

Optimize a model with 415 rows, 92 columns and 830 nonzeros
Presolve removed 138 rows and 0 columns
Presolve time: 0.00s
Presolved: 277 rows, 92 columns, 659 nonzeros
Variable types: 0 continuous, 92 integer (92 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.387500e+01, 176 iterations, 0.00 seconds

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

     0     0   33.87500    0   83   27.00000   33.87500  25.5%     -    0s
     0     0   33.32258    0   92   27.00000   33.32258  23.4%     -    0s
     0     0   32.85633    0   89   27.00000   32.85633  21.7%     -    0s
     0     0   32.60253    0   89   27.00000   32.60253  20.8%     -    0s
     0     0   32.24781    0   90   27.00000   32.24781  19.4%     -    0s
     0     0   32.20414    0   91   27.00000   32.20414  19.3%     -    0s
     0     0   32.04908    0   90   27.00000   32.04908  18.7%     -    0s
     0     0   31.89220    0   91   27.00000   31.89220  18.1%     -    0s
H    0     0                      28.0000000   31.89220  13.9%     -    0s
     0     0   31.78707    0   92   28.00000   31.78707  13.5%     -    0s
     0     0   31.76809    0   91   28.00000   31.76809  13.5%     -    0s
     0     0   31.72692    0   90   28.00000   31.72692  13.3%     -    0s
     0     0   31.71693    0   90   28.00000   31.71693  13.3%     -    0s
     0     0   31.71693    0   89   28.00000   31.71693  13.3%     -    0s
     0     2   31.71362    0   89   28.00000   31.71362  13.3%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 1
  Zero half: 53

Explored 133 nodes (3956 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%