Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012

Optimize a model with 150 rows, 55 columns and 300 nonzeros
Presolve removed 57 rows and 8 columns
Presolve time: 0.00s
Presolved: 93 rows, 47 columns, 205 nonzeros
Variable types: 0 continuous, 47 integer (47 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.400000e+01, 54 iterations, 0.00 seconds

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

     0     0   24.00000    0   38   20.00000   24.00000  20.0%     -    0s
H    0     0                      21.0000000   24.00000  14.3%     -    0s
     0     0   23.00000    0   44   21.00000   23.00000  9.52%     -    0s
H    0     0                      22.0000000   23.00000  4.55%     -    0s
*    0     0               0      23.0000000   23.00000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 20

Explored 0 nodes (131 simplex iterations) in 0.01 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%