Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:47 2012

Optimize a model with 310 rows, 77 columns and 620 nonzeros
Presolve removed 90 rows and 0 columns
Presolve time: 0.00s
Presolved: 220 rows, 77 columns, 513 nonzeros
Variable types: 0 continuous, 77 integer (77 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 3.000000e+01, 116 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   58   23.00000   30.00000  30.4%     -    0s
H    0     0                      25.0000000   30.00000  20.0%     -    0s
     0     0   29.31250    0   70   25.00000   29.31250  17.3%     -    0s
     0     0   28.77778    0   73   25.00000   28.77778  15.1%     -    0s
     0     0   28.45455    0   71   25.00000   28.45455  13.8%     -    0s
     0     0   28.25000    0   74   25.00000   28.25000  13.0%     -    0s
     0     0   28.17391    0   75   25.00000   28.17391  12.7%     -    0s
     0     0   28.08696    0   76   25.00000   28.08696  12.3%     -    0s
     0     0   28.07294    0   75   25.00000   28.07294  12.3%     -    0s
     0     0   27.97419    0   76   25.00000   27.97419  11.9%     -    0s
     0     0   27.94737    0   76   25.00000   27.94737  11.8%     -    0s
     0     0   27.94737    0   76   25.00000   27.94737  11.8%     -    0s
     0     0   27.94737    0   76   25.00000   27.94737  11.8%     -    0s
     0     2   27.90000    0   76   25.00000   27.90000  11.6%     -    0s

Cutting planes:
  Zero half: 63

Explored 91 nodes (2152 simplex iterations) in 0.09 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%