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

Optimize a model with 328 rows, 79 columns and 656 nonzeros
Presolve removed 125 rows and 3 columns
Presolve time: 0.00s
Presolved: 203 rows, 76 columns, 492 nonzeros
Variable types: 0 continuous, 76 integer (76 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 3.000000e+01, 147 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   63   23.00000   30.00000  30.4%     -    0s
H    0     0                      24.0000000   30.00000  25.0%     -    0s
     0     0   29.66667    0   62   24.00000   29.66667  23.6%     -    0s
H    0     0                      26.0000000   29.66667  14.1%     -    0s
     0     0   29.30556    0   71   26.00000   29.30556  12.7%     -    0s
H    0     0                      27.0000000   29.30556  8.54%     -    0s
     0     0   28.71429    0   71   27.00000   28.71429  6.35%     -    0s
     0     0   28.67089    0   74   27.00000   28.67089  6.19%     -    0s
     0     0   28.62896    0   73   27.00000   28.62896  6.03%     -    0s
     0     0   28.50000    0   68   27.00000   28.50000  5.56%     -    0s
     0     0   28.43366    0   75   27.00000   28.43366  5.31%     -    0s
     0     0   28.40487    0   75   27.00000   28.40487  5.20%     -    0s
     0     0   28.40299    0   75   27.00000   28.40299  5.20%     -    0s
     0     0   28.40299    0   74   27.00000   28.40299  5.20%     -    0s
     0     2   28.40299    0   74   27.00000   28.40299  5.20%     -    0s

Cutting planes:
  Zero half: 30

Explored 15 nodes (682 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%