Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:24 2012

Optimize a model with 399 rows, 120 columns and 798 nonzeros
Presolve removed 107 rows and 8 columns
Presolve time: 0.00s
Presolved: 292 rows, 112 columns, 623 nonzeros
Variable types: 0 continuous, 112 integer (112 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.250000e+01, 148 iterations, 0.00 seconds

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

     0     0   52.50000    0   93   43.00000   52.50000  22.1%     -    0s
H    0     0                      44.0000000   52.50000  19.3%     -    0s
     0     0   50.66667    0  106   44.00000   50.66667  15.2%     -    0s
H    0     0                      46.0000000   50.66667  10.1%     -    0s
     0     0   49.44809    0  110   46.00000   49.44809  7.50%     -    0s
     0     0   49.18323    0  109   46.00000   49.18323  6.92%     -    0s
     0     0   49.03330    0  111   46.00000   49.03330  6.59%     -    0s
     0     0   48.89171    0  112   46.00000   48.89171  6.29%     -    0s
     0     0   48.66667    0  108   46.00000   48.66667  5.80%     -    0s
     0     0   48.56977    0  107   46.00000   48.56977  5.59%     -    0s
     0     0   48.49941    0  110   46.00000   48.49941  5.43%     -    0s
     0     0   48.48500    0  109   46.00000   48.48500  5.40%     -    0s
H    0     0                      47.0000000   48.48500  3.16%     -    0s
     0     0   48.43582    0  110   47.00000   48.43582  3.05%     -    0s
     0     0   48.43582    0  108   47.00000   48.43582  3.05%     -    0s
     0     2   48.43582    0  107   47.00000   48.43582  3.05%     -    0s

Cutting planes:
  Zero half: 43

Explored 9 nodes (1018 simplex iterations) in 0.07 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%