Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:46 2012

Optimize a model with 255 rows, 75 columns and 510 nonzeros
Presolve removed 81 rows and 2 columns
Presolve time: 0.00s
Presolved: 174 rows, 73 columns, 396 nonzeros
Variable types: 0 continuous, 73 integer (73 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.040000e+01, 136 iterations, 0.00 seconds

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

     0     0   30.40000    0   67   24.00000   30.40000  26.7%     -    0s
H    0     0                      26.0000000   30.40000  16.9%     -    0s
H    0     0                      27.0000000   30.40000  12.6%     -    0s
     0     0   29.62921    0   69   27.00000   29.62921  9.74%     -    0s
     0     0   29.50556    0   72   27.00000   29.50556  9.28%     -    0s
     0     0   29.15385    0   67   27.00000   29.15385  7.98%     -    0s
     0     0   29.05556    0   70   27.00000   29.05556  7.61%     -    0s
     0     0   28.95714    0   69   27.00000   28.95714  7.25%     -    0s
     0     0   28.88889    0   72   27.00000   28.88889  7.00%     -    0s
     0     0   28.77778    0   68   27.00000   28.77778  6.58%     -    0s
     0     0   28.77778    0   68   27.00000   28.77778  6.58%     -    0s
     0     0   28.77778    0   62   27.00000   28.77778  6.58%     -    0s
     0     2   28.77778    0   62   27.00000   28.77778  6.58%     -    0s

Cutting planes:
  Zero half: 28

Explored 20 nodes (797 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%