Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012

Optimize a model with 231 rows, 68 columns and 462 nonzeros
Presolve removed 70 rows and 0 columns
Presolve time: 0.00s
Presolved: 161 rows, 68 columns, 370 nonzeros
Variable types: 0 continuous, 68 integer (68 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 2.750000e+01, 87 iterations, 0.00 seconds

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

     0     0   27.50000    0   54   25.00000   27.50000  10.0%     -    0s
H    0     0                      26.0000000   27.50000  5.77%     -    0s
     0     0   27.33333    0   63   26.00000   27.33333  5.13%     -    0s
     0     0   27.00000    0   58   26.00000   27.00000  3.85%     -    0s
     0     0     cutoff    0        26.00000   26.99997  3.85%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 17

Explored 0 nodes (173 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%