Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:09 2012

Optimize a model with 280 rows, 100 columns and 560 nonzeros
Presolve removed 85 rows and 14 columns
Presolve time: 0.00s
Presolved: 195 rows, 86 columns, 410 nonzeros
Variable types: 0 continuous, 86 integer (86 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 4.500000e+01, 112 iterations, 0.00 seconds

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

     0     0   45.00000    0   66   40.00000   45.00000  12.5%     -    0s
     0     0   44.00000    0   81   40.00000   44.00000  10.0%     -    0s
H    0     0                      42.0000000   44.00000  4.76%     -    0s
     0     0   43.66667    0   67   42.00000   43.66667  3.97%     -    0s
     0     0   43.50000    0   82   42.00000   43.50000  3.57%     -    0s
H    0     0                      43.0000000   43.50000  1.16%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 13

Explored 0 nodes (231 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%