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

Optimize a model with 321 rows, 78 columns and 642 nonzeros
Presolve removed 99 rows and 0 columns
Presolve time: 0.00s
Presolved: 222 rows, 78 columns, 528 nonzeros
Variable types: 0 continuous, 78 integer (78 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.000000e+01, 136 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   73   24.00000   30.00000  25.0%     -    0s
H    0     0                      25.0000000   30.00000  20.0%     -    0s
     0     0   29.77059    0   74   25.00000   29.77059  19.1%     -    0s
     0     0   29.16667    0   75   25.00000   29.16667  16.7%     -    0s
H    0     0                      26.0000000   29.16667  12.2%     -    0s
H    0     0                      27.0000000   29.16667  8.02%     -    0s
     0     0   28.80000    0   73   27.00000   28.80000  6.67%     -    0s
     0     0   28.72093    0   76   27.00000   28.72093  6.37%     -    0s
     0     0   28.70370    0   75   27.00000   28.70370  6.31%     -    0s
     0     0   28.65789    0   76   27.00000   28.65789  6.14%     -    0s
     0     0   28.60784    0   76   27.00000   28.60784  5.95%     -    0s
     0     0   28.59184    0   76   27.00000   28.59184  5.90%     -    0s
     0     0   28.59184    0   74   27.00000   28.59184  5.90%     -    0s
     0     2   28.59184    0   73   27.00000   28.59184  5.90%     -    0s

Cutting planes:
  Zero half: 33

Explored 22 nodes (885 simplex iterations) in 0.05 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%