Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:47 2012

Optimize a model with 298 rows, 77 columns and 596 nonzeros
Presolve removed 104 rows and 2 columns
Presolve time: 0.00s
Presolved: 194 rows, 75 columns, 464 nonzeros
Variable types: 0 continuous, 75 integer (75 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 2.900000e+01, 123 iterations, 0.00 seconds

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

     0     0   29.00000    0   62   23.00000   29.00000  26.1%     -    0s
H    0     0                      27.0000000   29.00000  7.41%     -    0s
     0     0   28.70000    0   72   27.00000   28.70000  6.30%     -    0s
     0     0   28.50000    0   67   27.00000   28.50000  5.56%     -    0s
     0     0   28.00000    0   65   27.00000   28.00000  3.70%     -    0s
     0     0     cutoff    0        27.00000   27.99997  3.70%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 32

Explored 0 nodes (323 simplex iterations) in 0.02 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%