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

Optimize a model with 251 rows, 75 columns and 502 nonzeros
Presolve removed 92 rows and 5 columns
Presolve time: 0.00s
Presolved: 159 rows, 70 columns, 370 nonzeros
Variable types: 0 continuous, 70 integer (70 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.033333e+01, 104 iterations, 0.00 seconds

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

     0     0   30.33333    0   65   26.00000   30.33333  16.7%     -    0s
     0     0   29.50000    0   63   26.00000   29.50000  13.5%     -    0s
     0     0   29.33333    0   65   26.00000   29.33333  12.8%     -    0s
H    0     0                      27.0000000   29.33333  8.64%     -    0s
     0     0   29.21053    0   66   27.00000   29.21053  8.19%     -    0s
     0     0   29.07143    0   66   27.00000   29.07143  7.67%     -    0s
     0     0   28.97260    0   67   27.00000   28.97260  7.31%     -    0s
     0     0   28.90909    0   65   27.00000   28.90909  7.07%     -    0s
H    0     0                      28.0000000   28.90909  3.25%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 18

Explored 0 nodes (317 simplex iterations) in 0.02 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%