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

Optimize a model with 262 rows, 76 columns and 524 nonzeros
Presolve removed 87 rows and 5 columns
Presolve time: 0.00s
Presolved: 175 rows, 71 columns, 394 nonzeros
Variable types: 0 continuous, 71 integer (71 binary)
Found heuristic solution: objective 29.0000000

Root relaxation: objective 3.176471e+01, 120 iterations, 0.00 seconds

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

     0     0   31.76471    0   69   29.00000   31.76471  9.53%     -    0s
H    0     0                      30.0000000   31.76471  5.88%     -    0s
     0     0   31.20930    0   64   30.00000   31.20930  4.03%     -    0s
     0     0     cutoff    0        30.00000   30.99997  3.33%     -    0s

Cutting planes:
  Gomory: 4
  Zero half: 38

Explored 0 nodes (199 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%