Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:08 2012

Optimize a model with 464 rows, 96 columns and 928 nonzeros
Presolve removed 166 rows and 0 columns
Presolve time: 0.00s
Presolved: 298 rows, 96 columns, 731 nonzeros
Variable types: 0 continuous, 96 integer (96 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.461084e+01, 196 iterations, 0.00 seconds

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

     0     0   34.61084    0   92   27.00000   34.61084  28.2%     -    0s
H    0     0                      30.0000000   34.61084  15.4%     -    0s
     0     0   34.07087    0   92   30.00000   34.07087  13.6%     -    0s
     0     0   33.93233    0   92   30.00000   33.93233  13.1%     -    0s
H    0     0                      31.0000000   33.93233  9.46%     -    0s
     0     0   33.73545    0   90   31.00000   33.73545  8.82%     -    0s
     0     0   33.60615    0   92   31.00000   33.60615  8.41%     -    0s
     0     0   33.49685    0   94   31.00000   33.49685  8.05%     -    0s
     0     0   33.45675    0   92   31.00000   33.45675  7.93%     -    0s
     0     0   33.35127    0   92   31.00000   33.35127  7.58%     -    0s
     0     0   33.30715    0   92   31.00000   33.30715  7.44%     -    0s
     0     0   33.28353    0   93   31.00000   33.28353  7.37%     -    0s
     0     0   33.27852    0   94   31.00000   33.27852  7.35%     -    0s
     0     0   33.27852    0   94   31.00000   33.27852  7.35%     -    0s
     0     2   33.27637    0   93   31.00000   33.27637  7.34%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 39

Explored 23 nodes (1376 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%