Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012

Optimize a model with 232 rows, 68 columns and 464 nonzeros
Presolve removed 55 rows and 0 columns
Presolve time: 0.00s
Presolved: 177 rows, 68 columns, 391 nonzeros
Variable types: 0 continuous, 68 integer (68 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 2.800000e+01, 102 iterations, 0.00 seconds

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

     0     0   28.00000    0   55   23.00000   28.00000  21.7%     -    0s
H    0     0                      25.0000000   28.00000  12.0%     -    0s
     0     0   27.28571    0   63   25.00000   27.28571  9.14%     -    0s
     0     0   27.09091    0   65   25.00000   27.09091  8.36%     -    0s
     0     0   26.66667    0   58   25.00000   26.66667  6.67%     -    0s
     0     0   26.50000    0   56   25.00000   26.50000  6.00%     -    0s
     0     0   26.47917    0   59   25.00000   26.47917  5.92%     -    0s
     0     0   26.32353    0   60   25.00000   26.32353  5.29%     -    0s
     0     0   26.28571    0   59   25.00000   26.28571  5.14%     -    0s
     0     0   26.18919    0   62   25.00000   26.18919  4.76%     -    0s
     0     0   26.14286    0   58   25.00000   26.14286  4.57%     -    0s
     0     0   26.00000    0   58   25.00000   26.00000  4.00%     -    0s
     0     0   26.00000    0   58   25.00000   26.00000  4.00%     -    0s
     0     0   26.00000    0   50   25.00000   26.00000  4.00%     -    0s
     0     2   26.00000    0   48   25.00000   26.00000  4.00%     -    0s

Explored 3 nodes (541 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%