Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:21 2012 Optimize a model with 349 rows, 351 columns and 1221 nonzeros Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 349 rows, 323 columns, 1193 nonzeros Variable types: 0 continuous, 323 integer (322 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 0.000000e+00, 217 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 0 142 56.00000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 38.0000000 0.00000 100% - 0s 0 0 0.27536 0 144 38.00000 0.27536 99.3% - 0s H 0 0 36.0000000 0.27536 99.2% - 0s H 0 0 35.0000000 0.27536 99.2% - 0s 0 0 0.79726 0 147 35.00000 0.79726 97.7% - 0s H 0 0 34.0000000 0.79726 97.7% - 0s H 0 0 30.0000000 0.79726 97.3% - 0s H 0 0 22.0000000 0.79726 96.4% - 0s H 0 0 21.0000000 0.79726 96.2% - 0s 0 2 0.79739 0 147 21.00000 0.79739 96.2% - 0s H 27 27 13.0000000 0.97577 92.5% 23.3 0s * 39 25 25 9.0000000 0.97577 89.2% 18.6 0s * 256 88 23 8.0000000 1.23002 84.6% 17.9 0s Cutting planes: Gomory: 4 Zero half: 1 Mod-K: 1 Explored 532 nodes (10941 simplex iterations) in 0.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%