Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:38 2012

Optimize a model with 112 rows, 45 columns and 224 nonzeros
Presolve removed 38 rows and 2 columns
Presolve time: 0.00s
Presolved: 74 rows, 43 columns, 167 nonzeros
Variable types: 0 continuous, 43 integer (43 binary)
Found heuristic solution: objective 17.0000000

Root relaxation: objective 1.950000e+01, 46 iterations, 0.00 seconds

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

     0     0   19.50000    0   17   17.00000   19.50000  14.7%     -    0s
H    0     0                      18.0000000   19.50000  8.33%     -    0s
H    0     0                      19.0000000   19.50000  2.63%     -    0s

Explored 0 nodes (78 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%