Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012

Optimize a model with 158 rows, 57 columns and 316 nonzeros
Presolve removed 39 rows and 2 columns
Presolve time: 0.00s
Presolved: 119 rows, 55 columns, 257 nonzeros
Variable types: 0 continuous, 55 integer (55 binary)
Found heuristic solution: objective 22.0000000

Root relaxation: objective 2.477778e+01, 72 iterations, 0.00 seconds

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

     0     0   24.77778    0   46   22.00000   24.77778  12.6%     -    0s
H    0     0                      23.0000000   24.77778  7.73%     -    0s
     0     0   24.00000    0   40   23.00000   24.00000  4.35%     -    0s
     0     0   24.00000    0   38   23.00000   24.00000  4.35%     -    0s
     0     0   24.00000    0   42   23.00000   24.00000  4.35%     -    0s
     0     0   24.00000    0   42   23.00000   24.00000  4.35%     -    0s
     0     2   24.00000    0   42   23.00000   24.00000  4.35%     -    0s

Explored 3 nodes (245 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%