Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:23 2012 Optimize a model with 83 rows, 54 columns and 259 nonzeros Presolve time: 0.00s Presolved: 83 rows, 54 columns, 259 nonzeros Variable types: 0 continuous, 54 integer (54 binary) Found heuristic solution: objective 21.0000000 Found heuristic solution: objective 20.0000000 Root relaxation: objective 0.000000e+00, 20 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 13 20.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.73510 0 22 18.00000 0.73510 95.9% - 0s 0 0 0.79487 0 15 18.00000 0.79487 95.6% - 0s 0 0 0.79487 0 15 18.00000 0.79487 95.6% - 0s 0 0 0.79487 0 15 18.00000 0.79487 95.6% - 0s 0 2 1.10000 0 15 18.00000 1.10000 93.9% - 0s * 14 10 7 16.0000000 5.00000 68.8% 11.6 0s * 86 9 7 15.0000000 11.00000 26.7% 8.1 0s Cutting planes: Gomory: 1 Mod-K: 3 Explored 108 nodes (893 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%