Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:43:27 2012 Optimize a model with 317 rows, 334 columns and 1124 nonzeros Presolve removed 0 rows and 30 columns Presolve time: 0.00s Presolved: 317 rows, 304 columns, 1094 nonzeros Variable types: 0 continuous, 304 integer (303 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 0.000000e+00, 211 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 0 128 54.00000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.13746 0 130 37.00000 0.13746 100% - 0s H 0 0 28.0000000 0.13746 100% - 0s H 0 0 22.0000000 0.13746 99.4% - 0s 0 0 0.67886 0 135 22.00000 0.67886 96.9% - 0s 0 0 0.67886 0 140 22.00000 0.67886 96.9% - 0s 0 0 0.67886 0 139 22.00000 0.67886 96.9% - 0s H 0 0 20.0000000 0.67886 96.6% - 0s H 0 0 18.0000000 0.67886 96.2% - 0s 0 2 0.67914 0 136 18.00000 0.67914 96.2% - 0s H 27 25 8.0000000 1.00000 87.5% 25.8 0s * 166 38 30 7.0000000 1.00000 85.7% 21.6 0s * 478 75 22 6.0000000 1.97590 67.1% 21.7 0s Cutting planes: Gomory: 4 Zero half: 1 Mod-K: 2 Explored 592 nodes (16204 simplex iterations) in 0.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%