Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:34 2012

Optimize a model with 77 rows, 72 columns and 262 nonzeros
Presolve removed 0 rows and 3 columns
Presolve time: 0.00s
Presolved: 77 rows, 69 columns, 259 nonzeros
Variable types: 0 continuous, 69 integer (68 binary)
Found heuristic solution: objective 15.0000000

Root relaxation: objective 0.000000e+00, 42 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   30   15.00000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
     0     0    0.53103    0   34    9.00000    0.53103  94.1%     -    0s
H    0     0                       8.0000000    0.53103  93.4%     -    0s
     0     0    1.06868    0   35    8.00000    1.06868  86.6%     -    0s
     0     0    1.08265    0   36    8.00000    1.08265  86.5%     -    0s
     0     0    1.08265    0   36    8.00000    1.08265  86.5%     -    0s
H    0     0                       5.0000000    1.08265  78.3%     -    0s
     0     2    1.08334    0   36    5.00000    1.08334  78.3%     -    0s
*    4     4               3       4.0000000    2.28205  42.9%  24.8    0s

Cutting planes:
  Gomory: 3
  Zero half: 1

Explored 11 nodes (337 simplex iterations) in 0.01 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%