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

Optimize a model with 342 rows, 117 columns and 684 nonzeros
Presolve removed 59 rows and 2 columns
Presolve time: 0.00s
Presolved: 283 rows, 115 columns, 596 nonzeros
Variable types: 0 continuous, 115 integer (115 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.150000e+01, 176 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   85   42.00000   51.50000  22.6%     -    0s
H    0     0                      45.0000000   51.50000  14.4%     -    0s
     0     0   51.00000    0   82   45.00000   51.00000  13.3%     -    0s
     0     0   50.41667    0  112   45.00000   50.41667  12.0%     -    0s
H    0     0                      46.0000000   50.41667  9.60%     -    0s
     0     0   49.90000    0  112   46.00000   49.90000  8.48%     -    0s
     0     0   49.65520    0  115   46.00000   49.65520  7.95%     -    0s
     0     0   49.31349    0  110   46.00000   49.31349  7.20%     -    0s
     0     0   49.12500    0  112   46.00000   49.12500  6.79%     -    0s
     0     0   49.04566    0  115   46.00000   49.04566  6.62%     -    0s
     0     0   49.03113    0  115   46.00000   49.03113  6.59%     -    0s
     0     0   49.03113    0  115   46.00000   49.03113  6.59%     -    0s
     0     2   49.02083    0  115   46.00000   49.02083  6.57%     -    0s

Cutting planes:
  Zero half: 65

Explored 46 nodes (1856 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%