Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:00 2012

Optimize a model with 110 rows, 61 columns and 220 nonzeros
Presolve removed 28 rows and 12 columns
Presolve time: 0.00s
Presolved: 82 rows, 49 columns, 166 nonzeros
Variable types: 0 continuous, 49 integer (49 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.000000e+01, 61 iterations, 0.00 seconds

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

     0     0   30.00000    0   46   27.00000   30.00000  11.1%     -    0s
     0     0   28.60000    0   45   27.00000   28.60000  5.93%     -    0s
     0     0   28.50000    0   35   27.00000   28.50000  5.56%     -    0s
H    0     0                      28.0000000   28.50000  1.79%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 7

Explored 0 nodes (110 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%