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

Optimize a model with 101 rows, 62 columns and 202 nonzeros
Presolve removed 75 rows and 43 columns
Presolve time: 0.00s
Presolved: 26 rows, 19 columns, 53 nonzeros
Variable types: 0 continuous, 19 integer (19 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: cutoff, 15 iterations, 0.00 seconds

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

     0     0     cutoff    0        31.00000   31.99997  3.23%     -    0s

Explored 0 nodes (15 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%