Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012

Optimize a model with 298 rows, 111 columns and 596 nonzeros
Presolve removed 49 rows and 2 columns
Presolve time: 0.00s
Presolved: 249 rows, 109 columns, 526 nonzeros
Variable types: 0 continuous, 109 integer (109 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 5.100000e+01, 172 iterations, 0.00 seconds

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

     0     0   51.00000    0   86   44.00000   51.00000  15.9%     -    0s
     0     0   50.33333    0   92   44.00000   50.33333  14.4%     -    0s
H    0     0                      47.0000000   50.33333  7.09%     -    0s
     0     0   49.76754    0   98   47.00000   49.76754  5.89%     -    0s
     0     0   49.09091    0  104   47.00000   49.09091  4.45%     -    0s
     0     0   48.80000    0   92   47.00000   48.80000  3.83%     -    0s
     0     0   48.66667    0   99   47.00000   48.66667  3.55%     -    0s
     0     0   48.50000    0   99   47.00000   48.50000  3.19%     -    0s
     0     0   48.43750    0   96   47.00000   48.43750  3.06%     -    0s
     0     0   48.41667    0   93   47.00000   48.41667  3.01%     -    0s
     0     0   48.41667    0   93   47.00000   48.41667  3.01%     -    0s
     0     0   48.41667    0   84   47.00000   48.41667  3.01%     -    0s
H    0     0                      48.0000000   48.41667  0.87%     -    0s

Cutting planes:
  Zero half: 23

Explored 0 nodes (527 simplex iterations) in 0.04 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%