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

Optimize a model with 224 rows, 64 columns and 448 nonzeros
Presolve removed 71 rows and 3 columns
Presolve time: 0.00s
Presolved: 153 rows, 61 columns, 344 nonzeros
Variable types: 0 continuous, 61 integer (61 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.600000e+01, 97 iterations, 0.00 seconds

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

     0     0   26.00000    0   55   20.00000   26.00000  30.0%     -    0s
H    0     0                      23.0000000   26.00000  13.0%     -    0s
     0     0   25.31250    0   58   23.00000   25.31250  10.1%     -    0s
     0     0   25.00000    0   57   23.00000   25.00000  8.70%     -    0s
     0     0   24.83333    0   57   23.00000   24.83333  7.97%     -    0s
     0     0   24.75000    0   48   23.00000   24.75000  7.61%     -    0s
     0     0   24.70588    0   59   23.00000   24.70588  7.42%     -    0s
     0     0   24.57143    0   60   23.00000   24.57143  6.83%     -    0s
     0     0   24.40426    0   59   23.00000   24.40426  6.11%     -    0s
     0     0   24.30000    0   56   23.00000   24.30000  5.65%     -    0s
     0     0   24.30000    0   59   23.00000   24.30000  5.65%     -    0s
     0     0   24.30000    0   56   23.00000   24.30000  5.65%     -    0s
     0     2   24.30000    0   56   23.00000   24.30000  5.65%     -    0s

Cutting planes:
  Zero half: 19

Explored 9 nodes (529 simplex iterations) in 0.04 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%