Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:59 2012

Optimize a model with 85 rows, 81 columns and 291 nonzeros
Presolve removed 0 rows and 4 columns
Presolve time: 0.00s
Presolved: 85 rows, 77 columns, 287 nonzeros
Variable types: 0 continuous, 77 integer (76 binary)
Found heuristic solution: objective 17.0000000

Root relaxation: objective 0.000000e+00, 46 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   34   17.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     0    0.44118    0   35   11.00000    0.44118  96.0%     -    0s
H    0     0                      10.0000000    0.44118  95.6%     -    0s
     0     0    1.00000    0   36   10.00000    1.00000  90.0%     -    0s
H    0     0                       9.0000000    1.00000  88.9%     -    0s
H    0     0                       8.0000000    1.00000  87.5%     -    0s
     0     0    1.00000    0   37    8.00000    1.00000  87.5%     -    0s
     0     0    1.00000    0   32    8.00000    1.00000  87.5%     -    0s
H    0     0                       7.0000000    1.00000  85.7%     -    0s
     0     2    1.00000    0   32    7.00000    1.00000  85.7%     -    0s
*   38    26               8       6.0000000    1.00000  83.3%  12.6    0s
*   41    22               7       5.0000000    1.00000  80.0%  12.4    0s
H   55    19                       4.0000000    1.00000  75.0%  11.9    0s

Cutting planes:
  Gomory: 5
  Zero half: 1
  Mod-K: 2

Explored 160 nodes (2338 simplex iterations) in 0.04 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%