Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:30 2012

Optimize a model with 394 rows, 125 columns and 788 nonzeros
Presolve removed 54 rows and 0 columns
Presolve time: 0.00s
Presolved: 340 rows, 125 columns, 711 nonzeros
Variable types: 0 continuous, 125 integer (125 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.600000e+01, 150 iterations, 0.00 seconds

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

     0     0   56.00000    0  110   42.00000   56.00000  33.3%     -    0s
     0     0   54.75000    0  121   42.00000   54.75000  30.4%     -    0s
     0     0   53.73333    0  123   42.00000   53.73333  27.9%     -    0s
H    0     0                      45.0000000   53.73333  19.4%     -    0s
     0     0   53.08854    0  125   45.00000   53.08854  18.0%     -    0s
     0     0   52.15385    0  122   45.00000   52.15385  15.9%     -    0s
     0     0   51.63402    0  122   45.00000   51.63402  14.7%     -    0s
     0     0   51.32840    0  124   45.00000   51.32840  14.1%     -    0s
     0     0   51.22917    0  125   45.00000   51.22917  13.8%     -    0s
     0     0   51.12274    0  125   45.00000   51.12274  13.6%     -    0s
     0     0   51.07307    0  125   45.00000   51.07307  13.5%     -    0s
     0     0   51.07307    0  125   45.00000   51.07307  13.5%     -    0s
H    0     0                      47.0000000   51.07307  8.67%     -    0s
H    0     0                      48.0000000   51.07307  6.40%     -    0s
     0     2   51.06895    0  125   48.00000   51.06895  6.39%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 84

Explored 51 nodes (2471 simplex iterations) in 0.13 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%