Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:45 2012

Optimize a model with 262 rows, 73 columns and 524 nonzeros
Presolve removed 59 rows and 0 columns
Presolve time: 0.00s
Presolved: 203 rows, 73 columns, 451 nonzeros
Variable types: 0 continuous, 73 integer (73 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.000000e+01, 119 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   50   27.00000   30.00000  11.1%     -    0s
     0     0   29.46154    0   72   27.00000   29.46154  9.12%     -    0s
     0     0   28.87079    0   72   27.00000   28.87079  6.93%     -    0s
     0     0   28.47518    0   72   27.00000   28.47518  5.46%     -    0s
     0     0   28.36436    0   73   27.00000   28.36436  5.05%     -    0s
     0     0   28.31519    0   73   27.00000   28.31519  4.87%     -    0s
     0     0   28.29390    0   73   27.00000   28.29390  4.79%     -    0s
     0     0   28.29390    0   73   27.00000   28.29390  4.79%     -    0s
     0     2   28.29390    0   73   27.00000   28.29390  4.79%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 29

Explored 7 nodes (541 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%