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

Optimize a model with 293 rows, 76 columns and 586 nonzeros
Presolve removed 90 rows and 0 columns
Presolve time: 0.00s
Presolved: 203 rows, 76 columns, 477 nonzeros
Variable types: 0 continuous, 76 integer (76 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.000000e+01, 130 iterations, 0.00 seconds

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

     0     0   30.00000    0   56   25.00000   30.00000  20.0%     -    0s
     0     0   29.54545    0   71   25.00000   29.54545  18.2%     -    0s
     0     0   29.30769    0   71   25.00000   29.30769  17.2%     -    0s
     0     0   28.80000    0   70   25.00000   28.80000  15.2%     -    0s
     0     0   28.73913    0   71   25.00000   28.73913  15.0%     -    0s
     0     0   28.58283    0   73   25.00000   28.58283  14.3%     -    0s
H    0     0                      26.0000000   28.58283  9.93%     -    0s
     0     0   28.46429    0   71   26.00000   28.46429  9.48%     -    0s
     0     0   28.45455    0   72   26.00000   28.45455  9.44%     -    0s
     0     0   28.45455    0   72   26.00000   28.45455  9.44%     -    0s
     0     2   28.45455    0   72   26.00000   28.45455  9.44%     -    0s
*   15     2               6      27.0000000   28.33333  4.94%  15.6    0s

Cutting planes:
  Zero half: 30

Explored 22 nodes (790 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%