Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:36 2012 Optimize a model with 161 rows, 131 columns and 531 nonzeros Presolve time: 0.00s Presolved: 161 rows, 131 columns, 531 nonzeros Variable types: 0 continuous, 131 integer (131 binary) Found heuristic solution: objective 41.0000000 Found heuristic solution: objective 35.0000000 Root relaxation: objective 0.000000e+00, 88 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 51 35.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.39166 0 53 30.00000 0.39166 98.7% - 0s H 0 0 22.0000000 0.39166 98.2% - 0s H 0 0 19.0000000 0.39166 97.9% - 0s 0 0 0.44529 0 54 19.00000 0.44529 97.7% - 0s H 0 0 18.0000000 0.44529 97.5% - 0s 0 0 0.56810 0 57 18.00000 0.56810 96.8% - 0s 0 0 0.60591 0 59 18.00000 0.60591 96.6% - 0s 0 0 0.61579 0 58 18.00000 0.61579 96.6% - 0s 0 2 0.64202 0 58 18.00000 0.64202 96.4% - 0s * 23 22 14 15.0000000 2.71655 81.9% 17.6 0s * 43 26 12 14.0000000 2.74797 80.4% 19.6 0s * 85 37 11 13.0000000 5.00000 61.5% 19.7 0s * 228 38 11 12.0000000 6.17391 48.6% 16.2 0s Cutting planes: Gomory: 1 Zero half: 1 Mod-K: 3 Explored 350 nodes (5543 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%