Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012

Optimize a model with 187 rows, 62 columns and 374 nonzeros
Presolve removed 42 rows and 0 columns
Presolve time: 0.00s
Presolved: 145 rows, 62 columns, 318 nonzeros
Variable types: 0 continuous, 62 integer (62 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.650000e+01, 84 iterations, 0.00 seconds

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

     0     0   26.50000    0   49   20.00000   26.50000  32.5%     -    0s
H    0     0                      21.0000000   26.50000  26.2%     -    0s
H    0     0                      22.0000000   26.50000  20.5%     -    0s
     0     0   26.00000    0   46   22.00000   26.00000  18.2%     -    0s
     0     0   25.50000    0   56   22.00000   25.50000  15.9%     -    0s
H    0     0                      23.0000000   25.50000  10.9%     -    0s
     0     0   25.23077    0   60   23.00000   25.23077  9.70%     -    0s
     0     0   25.00000    0   60   23.00000   25.00000  8.70%     -    0s
     0     0   24.80000    0   61   23.00000   24.80000  7.83%     -    0s
     0     0   24.78652    0   61   23.00000   24.78652  7.77%     -    0s
     0     0   24.78652    0   60   23.00000   24.78652  7.77%     -    0s
     0     2   24.78652    0   59   23.00000   24.78652  7.77%     -    0s

Cutting planes:
  Zero half: 26

Explored 25 nodes (520 simplex iterations) in 0.03 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%