Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:31:59 2012

Optimize a model with 81 rows, 58 columns and 162 nonzeros
Presolve removed 49 rows and 30 columns
Presolve time: 0.00s
Presolved: 32 rows, 28 columns, 66 nonzeros
Variable types: 0 continuous, 28 integer (28 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 2.962500e+01, 30 iterations, 0.00 seconds

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

     0     0   29.62500    0   28   27.00000   29.62500  9.72%     -    0s
H    0     0                      28.0000000   29.62500  5.80%     -    0s
     0     0     cutoff    0        28.00000   28.99997  3.57%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 5

Explored 0 nodes (31 simplex iterations) in 0.00 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%