Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:36 2012

Optimize a model with 71 rows, 35 columns and 142 nonzeros
Presolve removed 46 rows and 15 columns
Presolve time: 0.00s
Presolved: 25 rows, 20 columns, 53 nonzeros
Variable types: 0 continuous, 20 integer (20 binary)
Found heuristic solution: objective 14.0000000

Root relaxation: objective 1.550000e+01, 17 iterations, 0.00 seconds

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

     0     0   15.50000    0   17   14.00000   15.50000  10.7%     -    0s
H    0     0                      15.0000000   15.50000  3.33%     -    0s

Explored 0 nodes (22 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%