Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:10 2012

Optimize a model with 75 rows, 63 columns and 248 nonzeros
Presolve time: 0.00s
Presolved: 75 rows, 63 columns, 248 nonzeros
Variable types: 0 continuous, 63 integer (63 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 0.000000e+00, 38 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   25   18.00000    0.00000   100%     -    0s
H    0     0                      12.0000000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
     0     0    0.61414    0   28   10.00000    0.61414  93.9%     -    0s
     0     0    0.65887    0   30   10.00000    0.65887  93.4%     -    0s
H    0     0                       7.0000000    0.65887  90.6%     -    0s
     0     0    0.68182    0   28    7.00000    0.68182  90.3%     -    0s
H    0     0                       4.0000000    0.68182  83.0%     -    0s
     0     0    0.69697    0   32    4.00000    0.69697  82.6%     -    0s
     0     0    0.72246    0   32    4.00000    0.72246  81.9%     -    0s
     0     2    0.73939    0   32    4.00000    0.73939  81.5%     -    0s

Cutting planes:
  Gomory: 1
  Mod-K: 4

Explored 7 nodes (239 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%