Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012

Optimize a model with 316 rows, 112 columns and 632 nonzeros
Presolve removed 58 rows and 5 columns
Presolve time: 0.00s
Presolved: 258 rows, 107 columns, 538 nonzeros
Variable types: 0 continuous, 107 integer (107 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 4.983333e+01, 180 iterations, 0.00 seconds

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

     0     0   49.83333    0  102   40.00000   49.83333  24.6%     -    0s
H    0     0                      47.0000000   49.83333  6.03%     -    0s
     0     0   48.66667    0   92   47.00000   48.66667  3.55%     -    0s
     0     0   48.50000    0  104   47.00000   48.50000  3.19%     -    0s
     0     0   48.11111    0   97   47.00000   48.11111  2.36%     -    0s
     0     0     cutoff    0        47.00000   47.99995  2.13%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 61

Explored 0 nodes (410 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%