Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:19 2012

Optimize a model with 77 rows, 50 columns and 240 nonzeros
Presolve time: 0.00s
Presolved: 77 rows, 50 columns, 240 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 23.0000000
Found heuristic solution: objective 20.0000000

Root relaxation: objective 0.000000e+00, 18 iterations, 0.00 seconds

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

     0     0    0.00000    0   12   20.00000    0.00000   100%     -    0s
H    0     0                      18.0000000    0.00000   100%     -    0s
     0     0    1.00000    0   14   18.00000    1.00000  94.4%     -    0s
     0     0    1.12500    0   14   18.00000    1.12500  93.8%     -    0s
     0     0    1.18142    0   20   18.00000    1.18142  93.4%     -    0s
     0     0    1.25000    0   14   18.00000    1.25000  93.1%     -    0s
     0     0    1.25000    0   14   18.00000    1.25000  93.1%     -    0s
     0     0    1.25000    0   14   18.00000    1.25000  93.1%     -    0s
H    0     0                      15.0000000    1.25000  91.7%     -    0s
     0     2    1.39344    0   14   15.00000    1.39344  90.7%     -    0s

Cutting planes:
  Gomory: 1
  Mod-K: 5

Explored 76 nodes (708 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%