Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:37:57 2012

Optimize a model with 57 rows, 51 columns and 191 nonzeros
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 57 rows, 50 columns, 190 nonzeros
Variable types: 0 continuous, 50 integer (49 binary)
Found heuristic solution: objective 12.0000000

Root relaxation: objective 0.000000e+00, 30 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   21   12.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
H    0     0                       7.0000000    0.00000   100%     -    0s
H    0     0                       5.0000000    0.00000   100%     -    0s
     0     0    0.47619    0   22    5.00000    0.47619  90.5%     -    0s
     0     0    1.05585    0   24    5.00000    1.05585  78.9%     -    0s
     0     0    1.05980    0   25    5.00000    1.05980  78.8%     -    0s
     0     0    1.05980    0   25    5.00000    1.05980  78.8%     -    0s
H    0     0                       4.0000000    1.05980  73.5%     -    0s
     0     2    1.08772    0   25    4.00000    1.08772  72.8%     -    0s

Cutting planes:
  Gomory: 3
  Zero half: 3

Explored 6 nodes (217 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%