Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:31:54 2012 Optimize a model with 265 rows, 209 columns and 869 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 265 rows, 208 columns, 868 nonzeros Variable types: 0 continuous, 208 integer (207 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 0.000000e+00, 114 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 75 50.00000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s 0 0 0.35893 0 77 41.00000 0.35893 99.1% - 0s 0 0 1.00164 0 80 41.00000 1.00164 97.6% - 0s H 0 0 36.0000000 1.00164 97.2% - 0s 0 0 1.02461 0 81 36.00000 1.02461 97.2% - 0s H 0 0 33.0000000 1.02461 96.9% - 0s 0 0 1.03509 0 82 33.00000 1.03509 96.9% - 0s H 0 0 31.0000000 1.03509 96.7% - 0s H 0 0 29.0000000 1.03509 96.4% - 0s 0 2 1.03618 0 82 29.00000 1.03618 96.4% - 0s * 25 25 15 24.0000000 2.40396 90.0% 33.8 0s * 109 72 20 23.0000000 5.58804 75.7% 25.2 0s * 145 84 14 22.0000000 5.60457 74.5% 25.0 0s * 187 99 15 21.0000000 7.96000 62.1% 25.5 0s * 200 94 9 20.0000000 8.00000 60.0% 25.0 0s * 388 86 11 19.0000000 11.63158 38.8% 21.5 0s Cutting planes: Gomory: 4 Mod-K: 2 Explored 681 nodes (13467 simplex iterations) in 0.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%