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

Optimize a model with 286 rows, 78 columns and 572 nonzeros
Presolve removed 85 rows and 2 columns
Presolve time: 0.00s
Presolved: 201 rows, 76 columns, 461 nonzeros
Variable types: 0 continuous, 76 integer (76 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.125000e+01, 125 iterations, 0.00 seconds

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

     0     0   31.25000    0   62   24.00000   31.25000  30.2%     -    0s
     0     0   30.87500    0   69   24.00000   30.87500  28.6%     -    0s
H    0     0                      26.0000000   30.87500  18.7%     -    0s
     0     0   30.20000    0   72   26.00000   30.20000  16.2%     -    0s
     0     0   30.00000    0   71   26.00000   30.00000  15.4%     -    0s
H    0     0                      27.0000000   30.00000  11.1%     -    0s
     0     0   30.00000    0   67   27.00000   30.00000  11.1%     -    0s
     0     0   30.00000    0   74   27.00000   30.00000  11.1%     -    0s
     0     0   30.00000    0   73   27.00000   30.00000  11.1%     -    0s
     0     2   30.00000    0   73   27.00000   30.00000  11.1%     -    0s
H    3     3                      28.0000000   29.66667  5.95%  47.3    0s

Cutting planes:
  Gomory: 1
  Zero half: 30

Explored 20 nodes (805 simplex iterations) in 0.04 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%