Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:12:23 2012 Optimize a model with 421 rows, 419 columns and 1469 nonzeros Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 421 rows, 396 columns, 1446 nonzeros Variable types: 0 continuous, 396 integer (395 binary) Found heuristic solution: objective 82.0000000 Root relaxation: objective 0.000000e+00, 251 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 0 166 82.00000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s 0 0 0.27276 0 169 56.00000 0.27276 100% - 0s H 0 0 53.0000000 0.27276 99.5% - 0s 0 0 0.75881 0 177 53.00000 0.75881 98.6% - 0s H 0 0 51.0000000 0.75881 98.5% - 0s 0 0 0.75881 0 180 51.00000 0.75881 98.5% - 0s 0 0 0.75881 0 180 51.00000 0.75881 98.5% - 0s H 0 0 45.0000000 0.75881 98.3% - 0s H 0 0 42.0000000 0.75881 98.2% - 0s H 0 0 40.0000000 0.75881 98.1% - 0s H 0 0 38.0000000 0.75881 98.0% - 0s 0 2 0.77429 0 174 38.00000 0.77429 98.0% - 0s H 18 18 17.0000000 1.00000 94.1% 83.6 0s H 27 27 12.0000000 1.00000 91.7% 60.3 0s * 31 22 23 9.0000000 1.00000 88.9% 58.9 0s Cutting planes: Gomory: 4 Mod-K: 1 Explored 349 nodes (13155 simplex iterations) in 0.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%