Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:04:28 2012 Optimize a model with 455 rows, 428 columns and 1563 nonzeros Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 455 rows, 404 columns, 1539 nonzeros Variable types: 0 continuous, 404 integer (403 binary) Found heuristic solution: objective 81.0000000 Root relaxation: objective 0.000000e+00, 244 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 0 176 81.00000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s 0 0 0.42817 0 178 59.00000 0.42817 99.3% - 0s H 0 0 43.0000000 0.42817 99.0% - 0s 0 0 0.66667 0 179 43.00000 0.66667 98.4% - 0s H 0 0 42.0000000 0.66667 98.4% - 0s 0 0 0.66667 0 181 42.00000 0.66667 98.4% - 0s 0 0 0.66667 0 181 42.00000 0.66667 98.4% - 0s 0 2 0.66667 0 178 42.00000 0.66667 98.4% - 0s * 53 42 35 19.0000000 1.00000 94.7% 30.7 0s * 99 61 32 18.0000000 1.00000 94.4% 28.4 0s H 121 51 14.0000000 1.00000 92.9% 30.0 0s * 152 63 19 13.0000000 1.00000 92.3% 31.0 0s H 191 78 12.0000000 1.00000 91.7% 32.5 0s Cutting planes: Gomory: 2 Zero half: 1 Mod-K: 2 Explored 1116 nodes (38190 simplex iterations) in 1.39 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%