Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:31:56 2012

Optimize a model with 37 rows, 36 columns and 74 nonzeros
Presolve removed 22 rows and 23 columns
Presolve time: 0.00s
Presolved: 15 rows, 13 columns, 30 nonzeros
Variable types: 0 continuous, 13 integer (13 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 2.250000e+01, 14 iterations, 0.00 seconds

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

     0     0   22.50000    0   13   21.00000   22.50000  7.14%     -    0s
H    0     0                      22.0000000   22.50000  2.27%     -    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 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%