Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:18 2012

Optimize a model with 310 rows, 115 columns and 620 nonzeros
Presolve removed 79 rows and 16 columns
Presolve time: 0.00s
Presolved: 231 rows, 99 columns, 470 nonzeros
Variable types: 0 continuous, 99 integer (99 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.400000e+01, 123 iterations, 0.00 seconds

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

     0     0   54.00000    0   86   45.00000   54.00000  20.0%     -    0s
     0     0   53.00000    0   88   45.00000   53.00000  17.8%     -    0s
H    0     0                      47.0000000   53.00000  12.8%     -    0s
     0     0   52.33333    0   96   47.00000   52.33333  11.3%     -    0s
H    0     0                      49.0000000   52.33333  6.80%     -    0s
     0     0   51.66667    0   97   49.00000   51.66667  5.44%     -    0s
     0     0   51.33333    0   99   49.00000   51.33333  4.76%     -    0s
     0     0   50.82353    0   99   49.00000   50.82353  3.72%     -    0s
     0     0   50.27778    0   98   49.00000   50.27778  2.61%     -    0s
     0     0   50.16129    0   97   49.00000   50.16129  2.37%     -    0s
     0     0     cutoff    0        49.00000   49.99995  2.04%     -    0s

Cutting planes:
  Zero half: 70

Explored 0 nodes (472 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%