Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:46 2012

Optimize a model with 281 rows, 75 columns and 562 nonzeros
Presolve removed 93 rows and 0 columns
Presolve time: 0.00s
Presolved: 188 rows, 75 columns, 448 nonzeros
Variable types: 0 continuous, 75 integer (75 binary)
Found heuristic solution: objective 22.0000000

Root relaxation: objective 2.888889e+01, 124 iterations, 0.00 seconds

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

     0     0   28.88889    0   72   22.00000   28.88889  31.3%     -    0s
H    0     0                      24.0000000   28.88889  20.4%     -    0s
H    0     0                      25.0000000   28.88889  15.6%     -    0s
     0     0   28.00000    0   68   25.00000   28.00000  12.0%     -    0s
     0     0   28.00000    0   69   25.00000   28.00000  12.0%     -    0s
     0     0   28.00000    0   62   25.00000   28.00000  12.0%     -    0s
H    0     0                      26.0000000   28.00000  7.69%     -    0s
     0     2   28.00000    0   60   26.00000   28.00000  7.69%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 1
  Zero half: 9

Explored 24 nodes (905 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%