Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:47 2012 Optimize a model with 103 rows, 83 columns and 338 nonzeros Presolve time: 0.00s Presolved: 103 rows, 83 columns, 338 nonzeros Variable types: 0 continuous, 83 integer (83 binary) Found heuristic solution: objective 20.0000000 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 31 20.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.48387 0 32 12.00000 0.48387 96.0% - 0s 0 0 1.00000 0 32 12.00000 1.00000 91.7% - 0s 0 0 1.00000 0 32 12.00000 1.00000 91.7% - 0s H 0 0 11.0000000 1.00000 90.9% - 0s 0 2 1.00000 0 31 11.00000 1.00000 90.9% - 0s * 11 11 6 10.0000000 3.14286 68.6% 20.9 0s * 16 8 10 9.0000000 3.14286 65.1% 15.4 0s * 31 4 5 8.0000000 5.55000 30.6% 14.8 0s Cutting planes: Gomory: 2 Zero half: 3 Explored 36 nodes (701 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%