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

Optimize a model with 110 rows, 62 columns and 220 nonzeros
Presolve removed 72 rows and 33 columns
Presolve time: 0.00s
Presolved: 38 rows, 29 columns, 77 nonzeros
Variable types: 0 continuous, 29 integer (29 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.133333e+01, 35 iterations, 0.00 seconds

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

     0     0   31.33333    0   29   30.00000   31.33333  4.44%     -    0s
H    0     0                      31.0000000   31.33333  1.08%     -    0s

Explored 0 nodes (37 simplex iterations) in 0.00 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%