Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:49 2012

Optimize a model with 294 rows, 80 columns and 588 nonzeros
Presolve removed 92 rows and 3 columns
Presolve time: 0.00s
Presolved: 202 rows, 77 columns, 463 nonzeros
Variable types: 0 continuous, 77 integer (77 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.255556e+01, 120 iterations, 0.00 seconds

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

     0     0   32.55556    0   75   24.00000   32.55556  35.6%     -    0s
H    0     0                      27.0000000   32.55556  20.6%     -    0s
     0     0   31.64356    0   76   27.00000   31.64356  17.2%     -    0s
     0     0   31.21990    0   76   27.00000   31.21990  15.6%     -    0s
H    0     0                      28.0000000   31.21990  11.5%     -    0s
     0     0   31.00000    0   64   28.00000   31.00000  10.7%     -    0s
     0     0   30.54545    0   72   28.00000   30.54545  9.09%     -    0s
     0     0   30.45934    0   73   28.00000   30.45934  8.78%     -    0s
     0     0   30.40000    0   73   28.00000   30.40000  8.57%     -    0s
     0     0   30.30000    0   76   28.00000   30.30000  8.21%     -    0s
     0     0   30.28947    0   76   28.00000   30.28947  8.18%     -    0s
     0     0   30.28947    0   75   28.00000   30.28947  8.18%     -    0s
     0     2   30.24118    0   75   28.00000   30.24118  8.00%     -    0s

Cutting planes:
  Zero half: 35

Explored 31 nodes (1102 simplex iterations) in 0.06 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%