Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:02 2012

Optimize a model with 140 rows, 71 columns and 280 nonzeros
Presolve removed 39 rows and 14 columns
Presolve time: 0.00s
Presolved: 101 rows, 57 columns, 205 nonzeros
Variable types: 0 continuous, 57 integer (57 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.400000e+01, 72 iterations, 0.00 seconds

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

     0     0   34.00000    0   52   30.00000   34.00000  13.3%     -    0s
     0     0   33.00000    0   50   30.00000   33.00000  10.0%     -    0s
H    0     0                      31.0000000   33.00000  6.45%     -    0s
     0     0   33.00000    0   56   31.00000   33.00000  6.45%     -    0s
     0     0   33.00000    0   52   31.00000   33.00000  6.45%     -    0s
H    0     0                      32.0000000   33.00000  3.12%     -    0s
     0     2   33.00000    0   52   32.00000   33.00000  3.12%     -    0s

Explored 3 nodes (290 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%