Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:59 2012

Optimize a model with 404 rows, 90 columns and 808 nonzeros
Presolve removed 125 rows and 0 columns
Presolve time: 0.00s
Presolved: 279 rows, 90 columns, 661 nonzeros
Variable types: 0 continuous, 90 integer (90 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.400000e+01, 173 iterations, 0.00 seconds

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

     0     0   34.00000    0   86   24.00000   34.00000  41.7%     -    0s
H    0     0                      28.0000000   34.00000  21.4%     -    0s
     0     0   33.19672    0   87   28.00000   33.19672  18.6%     -    0s
     0     0   33.07787    0   90   28.00000   33.07787  18.1%     -    0s
     0     0   32.62392    0   89   28.00000   32.62392  16.5%     -    0s
     0     0   32.41852    0   89   28.00000   32.41852  15.8%     -    0s
     0     0   32.25242    0   90   28.00000   32.25242  15.2%     -    0s
     0     0   32.08772    0   90   28.00000   32.08772  14.6%     -    0s
     0     0   31.99906    0   90   28.00000   31.99906  14.3%     -    0s
     0     0   31.89796    0   90   28.00000   31.89796  13.9%     -    0s
     0     0   31.81815    0   90   28.00000   31.81815  13.6%     -    0s
     0     0   31.81302    0   90   28.00000   31.81302  13.6%     -    0s
     0     2   31.80751    0   90   28.00000   31.80751  13.6%     -    0s
H    5     5                      29.0000000   31.55556  8.81%  45.4    0s

Cutting planes:
  Gomory: 1
  Zero half: 41

Explored 49 nodes (2191 simplex iterations) in 0.12 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%