Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:25 2012

Optimize a model with 402 rows, 121 columns and 804 nonzeros
Presolve removed 107 rows and 7 columns
Presolve time: 0.00s
Presolved: 295 rows, 114 columns, 631 nonzeros
Variable types: 0 continuous, 114 integer (114 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.150000e+01, 191 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   91   42.00000   51.50000  22.6%     -    0s
     0     0   50.75000    0  111   42.00000   50.75000  20.8%     -    0s
H    0     0                      44.0000000   50.75000  15.3%     -    0s
     0     0   50.30000    0  111   44.00000   50.30000  14.3%     -    0s
     0     0   49.82576    0  109   44.00000   49.82576  13.2%     -    0s
H    0     0                      45.0000000   49.82576  10.7%     -    0s
     0     0   49.63501    0  111   45.00000   49.63501  10.3%     -    0s
     0     0   49.48718    0  112   45.00000   49.48718  10.0%     -    0s
     0     0   49.41906    0  113   45.00000   49.41906  9.82%     -    0s
     0     0   49.40026    0  112   45.00000   49.40026  9.78%     -    0s
     0     0   49.34783    0  113   45.00000   49.34783  9.66%     -    0s
     0     0   49.33197    0  113   45.00000   49.33197  9.63%     -    0s
     0     0   49.33197    0  113   45.00000   49.33197  9.63%     -    0s
H    0     0                      47.0000000   49.33197  4.96%     -    0s
     0     2   49.33014    0  113   47.00000   49.33014  4.96%     -    0s

Cutting planes:
  Zero half: 54

Explored 20 nodes (1162 simplex iterations) in 0.08 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%