Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:01 2012

Optimize a model with 124 rows, 66 columns and 248 nonzeros
Presolve removed 44 rows and 16 columns
Presolve time: 0.00s
Presolved: 80 rows, 50 columns, 161 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.250000e+01, 56 iterations, 0.00 seconds

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

     0     0   32.50000    0   39   30.00000   32.50000  8.33%     -    0s
     0     0   31.50000    0   27   30.00000   31.50000  5.00%     -    0s
H    0     0                      31.0000000   31.50000  1.61%     -    0s

Cutting planes:
  Zero half: 4

Explored 0 nodes (87 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%