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

Optimize a model with 343 rows, 120 columns and 686 nonzeros
Presolve removed 70 rows and 6 columns
Presolve time: 0.00s
Presolved: 273 rows, 114 columns, 572 nonzeros
Variable types: 0 continuous, 114 integer (114 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.325000e+01, 142 iterations, 0.00 seconds

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

     0     0   53.25000    0   98   43.00000   53.25000  23.8%     -    0s
     0     0   51.10000    0  113   43.00000   51.10000  18.8%     -    0s
H    0     0                      44.0000000   51.10000  16.1%     -    0s
H    0     0                      45.0000000   51.10000  13.6%     -    0s
     0     0   50.25000    0  112   45.00000   50.25000  11.7%     -    0s
H    0     0                      46.0000000   50.25000  9.24%     -    0s
     0     0   49.80000    0  108   46.00000   49.80000  8.26%     -    0s
     0     0   49.61538    0  113   46.00000   49.61538  7.86%     -    0s
     0     0   49.40000    0  106   46.00000   49.40000  7.39%     -    0s
     0     0   49.35714    0  110   46.00000   49.35714  7.30%     -    0s
     0     0   49.32143    0  107   46.00000   49.32143  7.22%     -    0s
     0     0   49.28571    0  111   46.00000   49.28571  7.14%     -    0s
     0     0   49.28571    0  108   46.00000   49.28571  7.14%     -    0s
H    0     0                      47.0000000   49.28571  4.86%     -    0s
     0     2   49.28571    0  106   47.00000   49.28571  4.86%     -    0s

Cutting planes:
  Zero half: 43

Explored 24 nodes (1377 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%