Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:24:16 2012 Optimize a model with 283 rows, 213 columns and 918 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 283 rows, 212 columns, 917 nonzeros Variable types: 0 continuous, 212 integer (211 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 0.000000e+00, 109 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 70 61.00000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s 0 0 0.68810 0 71 48.00000 0.68810 98.6% - 0s H 0 0 44.0000000 0.68810 98.4% - 0s 0 0 1.13333 0 72 44.00000 1.13333 97.4% - 0s H 0 0 39.0000000 1.13333 97.1% - 0s 0 0 1.32362 0 74 39.00000 1.32362 96.6% - 0s 0 0 1.33304 0 75 39.00000 1.33304 96.6% - 0s 0 0 1.33304 0 75 39.00000 1.33304 96.6% - 0s 0 2 1.34161 0 75 39.00000 1.34161 96.6% - 0s * 27 27 17 29.0000000 3.66203 87.4% 28.6 0s * 32 29 21 28.0000000 3.66203 86.9% 25.7 0s * 66 49 20 27.0000000 3.74584 86.1% 25.8 0s * 88 56 14 25.0000000 6.00780 76.0% 26.2 0s * 122 70 14 24.0000000 6.01182 75.0% 27.2 0s * 149 88 13 23.0000000 8.19565 64.4% 28.5 0s * 257 95 13 22.0000000 9.83725 55.3% 26.4 0s Cutting planes: Gomory: 5 Mod-K: 1 Explored 1166 nodes (25625 simplex iterations) in 0.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%