Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:51 2012

Optimize a model with 319 rows, 82 columns and 638 nonzeros
Presolve removed 120 rows and 3 columns
Presolve time: 0.00s
Presolved: 199 rows, 79 columns, 472 nonzeros
Variable types: 0 continuous, 79 integer (79 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.160000e+01, 137 iterations, 0.00 seconds

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

     0     0   31.60000    0   68   25.00000   31.60000  26.4%     -    0s
H    0     0                      28.0000000   31.60000  12.9%     -    0s
H    0     0                      29.0000000   31.60000  8.97%     -    0s
     0     0   31.13953    0   71   29.00000   31.13953  7.38%     -    0s
     0     0   30.75294    0   74   29.00000   30.75294  6.04%     -    0s
     0     0   30.25000    0   68   29.00000   30.25000  4.31%     -    0s
     0     0   30.00000    0   60   29.00000   30.00000  3.45%     -    0s
     0     0     cutoff    0        29.00000   29.99997  3.45%     -    0s

Cutting planes:
  Zero half: 39

Explored 0 nodes (432 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%