Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:37 2012

Optimize a model with 394 rows, 129 columns and 788 nonzeros
Presolve removed 84 rows and 6 columns
Presolve time: 0.00s
Presolved: 310 rows, 123 columns, 659 nonzeros
Variable types: 0 continuous, 123 integer (123 binary)
Found heuristic solution: objective 46.0000000

Root relaxation: objective 5.625000e+01, 169 iterations, 0.00 seconds

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

     0     0   56.25000    0  104   46.00000   56.25000  22.3%     -    0s
     0     0   55.50000    0  113   46.00000   55.50000  20.7%     -    0s
     0     0   54.81746    0  120   46.00000   54.81746  19.2%     -    0s
     0     0   54.25000    0  120   46.00000   54.25000  17.9%     -    0s
     0     0   53.75000    0  111   46.00000   53.75000  16.8%     -    0s
     0     0   53.42857    0  119   46.00000   53.42857  16.1%     -    0s
H    0     0                      49.0000000   53.42857  9.04%     -    0s
H    0     0                      51.0000000   53.42857  4.76%     -    0s
     0     0   53.08604    0  116   51.00000   53.08604  4.09%     -    0s
     0     0   52.84234    0  120   51.00000   52.84234  3.61%     -    0s
     0     0   52.73431    0  122   51.00000   52.73431  3.40%     -    0s
     0     0   52.73431    0  122   51.00000   52.73431  3.40%     -    0s
     0     0   52.73431    0  122   51.00000   52.73431  3.40%     -    0s
     0     2   52.73431    0  122   51.00000   52.73431  3.40%     -    0s

Cutting planes:
  Zero half: 51

Explored 15 nodes (1299 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%