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

Optimize a model with 351 rows, 117 columns and 702 nonzeros
Presolve removed 71 rows and 2 columns
Presolve time: 0.00s
Presolved: 280 rows, 115 columns, 600 nonzeros
Variable types: 0 continuous, 115 integer (115 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.150000e+01, 183 iterations, 0.00 seconds

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

     0     0   51.50000    0   87   42.00000   51.50000  22.6%     -    0s
     0     0   50.77778    0  105   42.00000   50.77778  20.9%     -    0s
H    0     0                      45.0000000   50.77778  12.8%     -    0s
     0     0   49.83333    0  110   45.00000   49.83333  10.7%     -    0s
H    0     0                      47.0000000   49.83333  6.03%     -    0s
     0     0   49.66667    0   97   47.00000   49.66667  5.67%     -    0s
     0     0   49.63158    0  107   47.00000   49.63158  5.60%     -    0s
H    0     0                      48.0000000   49.63158  3.40%     -    0s
     0     0   49.41667    0  110   48.00000   49.41667  2.95%     -    0s
     0     0   49.35714    0   79   48.00000   49.35714  2.83%     -    0s
     0     0   49.29167    0  107   48.00000   49.29167  2.69%     -    0s
     0     0   49.23529    0  102   48.00000   49.23529  2.57%     -    0s
     0     0   49.18182    0   91   48.00000   49.18182  2.46%     -    0s
     0     0   49.17949    0   91   48.00000   49.17949  2.46%     -    0s
     0     0   49.17949    0   88   48.00000   49.17949  2.46%     -    0s
     0     2   49.17949    0   88   48.00000   49.17949  2.46%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 24

Explored 3 nodes (746 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%