Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:02 2012 Optimize a model with 169 rows, 123 columns and 543 nonzeros Presolve time: 0.00s Presolved: 169 rows, 123 columns, 543 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 0.000000e+00, 72 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 39 37.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.66905 0 41 31.00000 0.66905 97.8% - 0s 0 0 0.68058 0 41 31.00000 0.68058 97.8% - 0s 0 0 0.85459 0 42 31.00000 0.85459 97.2% - 0s H 0 0 21.0000000 0.85459 95.9% - 0s 0 0 0.88127 0 47 21.00000 0.88127 95.8% - 0s 0 0 0.88433 0 51 21.00000 0.88433 95.8% - 0s 0 2 0.90904 0 51 21.00000 0.90904 95.7% - 0s * 20 16 10 20.0000000 4.21053 78.9% 22.6 0s * 27 19 12 19.0000000 4.21053 77.8% 18.6 0s * 116 31 8 18.0000000 9.61538 46.6% 18.2 0s * 120 23 9 16.0000000 9.61538 39.9% 17.9 0s Cutting planes: Gomory: 1 Zero half: 3 Mod-K: 1 Explored 164 nodes (2984 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%