Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:42 2012

Optimize a model with 469 rows, 131 columns and 938 nonzeros
Presolve removed 131 rows and 7 columns
Presolve time: 0.00s
Presolved: 338 rows, 124 columns, 736 nonzeros
Variable types: 0 continuous, 124 integer (124 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.475000e+01, 194 iterations, 0.00 seconds

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

     0     0   54.75000    0  100   45.00000   54.75000  21.7%     -    0s
     0     0   53.88889    0  119   45.00000   53.88889  19.8%     -    0s
H    0     0                      47.0000000   53.88889  14.7%     -    0s
     0     0   53.31081    0  123   47.00000   53.31081  13.4%     -    0s
     0     0   52.95000    0  119   47.00000   52.95000  12.7%     -    0s
     0     0   52.63030    0  119   47.00000   52.63030  12.0%     -    0s
     0     0   52.30187    0  122   47.00000   52.30187  11.3%     -    0s
     0     0   52.19792    0  120   47.00000   52.19792  11.1%     -    0s
     0     0   52.11429    0  119   47.00000   52.11429  10.9%     -    0s
     0     0   51.91348    0  120   47.00000   51.91348  10.5%     -    0s
     0     0   51.88392    0  122   47.00000   51.88392  10.4%     -    0s
     0     0   51.86655    0  122   47.00000   51.86655  10.4%     -    0s
     0     0   51.86655    0  122   47.00000   51.86655  10.4%     -    0s
     0     2   51.86406    0  122   47.00000   51.86406  10.3%     -    0s
H    6     6                      48.0000000   51.68226  7.67%  44.7    0s

Cutting planes:
  Gomory: 1
  Zero half: 80

Explored 127 nodes (4181 simplex iterations) in 0.19 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%