Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:49:58 2012

Optimize a model with 323 rows, 339 columns and 1144 nonzeros
Presolve removed 0 rows and 27 columns
Presolve time: 0.00s
Presolved: 323 rows, 312 columns, 1117 nonzeros
Variable types: 0 continuous, 312 integer (311 binary)
Found heuristic solution: objective 60.0000000

Root relaxation: objective 0.000000e+00, 210 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  133   60.00000    0.00000   100%     -    0s
H    0     0                      52.0000000    0.00000   100%     -    0s
H    0     0                      36.0000000    0.00000   100%     -    0s
H    0     0                      31.0000000    0.00000   100%     -    0s
     0     0    0.14332    0  135   31.00000    0.14332   100%     -    0s
H    0     0                      30.0000000    0.14332   100%     -    0s
     0     0    0.73590    0  139   30.00000    0.73590  97.5%     -    0s
H    0     0                      22.0000000    0.73590  96.7%     -    0s
H    0     0                      13.0000000    0.73590  94.3%     -    0s
     0     0    0.73590    0  139   13.00000    0.73590  94.3%     -    0s
     0     2    0.73719    0  139   13.00000    0.73719  94.3%     -    0s
H   27    27                       8.0000000    1.00000  87.5%  24.0    0s
*   29    13              20       4.0000000    1.00000  75.0%  23.3    0s

Cutting planes:
  Gomory: 4
  Zero half: 8

Explored 74 nodes (3297 simplex iterations) in 0.17 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%