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

Optimize a model with 266 rows, 75 columns and 532 nonzeros
Presolve removed 82 rows and 2 columns
Presolve time: 0.00s
Presolved: 184 rows, 73 columns, 420 nonzeros
Variable types: 0 continuous, 73 integer (73 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.000000e+01, 112 iterations, 0.00 seconds

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

     0     0   30.00000    0   56   25.00000   30.00000  20.0%     -    0s
     0     0   29.72727    0   67   25.00000   29.72727  18.9%     -    0s
H    0     0                      26.0000000   29.72727  14.3%     -    0s
     0     0   29.51316    0   68   26.00000   29.51316  13.5%     -    0s
     0     0   29.39318    0   70   26.00000   29.39318  13.1%     -    0s
     0     0   29.31250    0   66   26.00000   29.31250  12.7%     -    0s
H    0     0                      27.0000000   29.31250  8.56%     -    0s
     0     0   29.27273    0   69   27.00000   29.27273  8.42%     -    0s
     0     0   29.19064    0   73   27.00000   29.19064  8.11%     -    0s
     0     0   28.98030    0   72   27.00000   28.98030  7.33%     -    0s
     0     0   28.80000    0   72   27.00000   28.80000  6.67%     -    0s
     0     0   28.75491    0   73   27.00000   28.75491  6.50%     -    0s
     0     0   28.71537    0   72   27.00000   28.71537  6.35%     -    0s
     0     0   28.70248    0   73   27.00000   28.70248  6.31%     -    0s
     0     0   28.70248    0   73   27.00000   28.70248  6.31%     -    0s
     0     2   28.69636    0   73   27.00000   28.69636  6.28%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 36

Explored 15 nodes (634 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%