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

Optimize a model with 309 rows, 78 columns and 618 nonzeros
Presolve removed 101 rows and 0 columns
Presolve time: 0.00s
Presolved: 208 rows, 78 columns, 486 nonzeros
Variable types: 0 continuous, 78 integer (78 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 2.883733e+01, 123 iterations, 0.00 seconds

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

     0     0   28.83733    0   77   23.00000   28.83733  25.4%     -    0s
     0     0   28.34744    0   73   23.00000   28.34744  23.2%     -    0s
H    0     0                      25.0000000   28.34744  13.4%     -    0s
     0     0   28.16795    0   78   25.00000   28.16795  12.7%     -    0s
     0     0   28.10862    0   78   25.00000   28.10862  12.4%     -    0s
     0     0   28.00156    0   77   25.00000   28.00156  12.0%     -    0s
     0     0   27.96540    0   76   25.00000   27.96540  11.9%     -    0s
     0     0   27.81164    0   75   25.00000   27.81164  11.2%     -    0s
     0     0   27.77831    0   75   25.00000   27.77831  11.1%     -    0s
     0     0   27.75548    0   76   25.00000   27.75548  11.0%     -    0s
     0     0   27.74885    0   77   25.00000   27.74885  11.0%     -    0s
     0     0   27.74885    0   75   25.00000   27.74885  11.0%     -    0s
     0     2   27.74691    0   75   25.00000   27.74691  11.0%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 54

Explored 54 nodes (1547 simplex iterations) in 0.08 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%