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

Optimize a model with 92 rows, 56 columns and 184 nonzeros
Presolve removed 40 rows and 19 columns
Presolve time: 0.00s
Presolved: 52 rows, 37 columns, 108 nonzeros
Variable types: 0 continuous, 37 integer (37 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 2.800000e+01, 43 iterations, 0.00 seconds

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

     0     0   28.00000    0   18   26.00000   28.00000  7.69%     -    0s
H    0     0                      27.0000000   28.00000  3.70%     -    0s
     0     0   28.00000    0   34   27.00000   28.00000  3.70%     -    0s
     0     0 infeasible    0        27.00000   27.99997  3.70%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 5

Explored 0 nodes (79 simplex iterations) in 0.00 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%