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

Optimize a model with 307 rows, 106 columns and 614 nonzeros
Presolve removed 55 rows and 2 columns
Presolve time: 0.00s
Presolved: 252 rows, 104 columns, 532 nonzeros
Variable types: 0 continuous, 104 integer (104 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 4.600000e+01, 148 iterations, 0.00 seconds

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

     0     0   46.00000    0   82   38.00000   46.00000  21.1%     -    0s
     0     0   44.66667    0   92   38.00000   44.66667  17.5%     -    0s
H    0     0                      39.0000000   44.66667  14.5%     -    0s
     0     0   44.25000    0   83   39.00000   44.25000  13.5%     -    0s
H    0     0                      41.0000000   44.25000  7.93%     -    0s
     0     0   44.16667    0  102   41.00000   44.16667  7.72%     -    0s
     0     0   43.95238    0  102   41.00000   43.95238  7.20%     -    0s
     0     0   43.71888    0  104   41.00000   43.71888  6.63%     -    0s
     0     0   43.39344    0  104   41.00000   43.39344  5.84%     -    0s
     0     0   43.25767    0  103   41.00000   43.25767  5.51%     -    0s
     0     0   43.20000    0  104   41.00000   43.20000  5.37%     -    0s
H    0     0                      42.0000000   43.20000  2.86%     -    0s
     0     0   43.16875    0  104   42.00000   43.16875  2.78%     -    0s
     0     0   43.16875    0  103   42.00000   43.16875  2.78%     -    0s
     0     2   43.15641    0  103   42.00000   43.15641  2.75%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 35

Explored 3 nodes (606 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%