Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:46:48 2012 Optimize a model with 2177 rows, 94 columns and 4354 nonzeros Presolve removed 1526 rows and 0 columns Presolve time: 0.06s Presolved: 651 rows, 94 columns, 4396 nonzeros Variable types: 0 continuous, 94 integer (94 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.395357e+01, 308 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.95357 0 84 6.00000 13.95357 133% - 0s H 0 0 8.0000000 13.95357 74.4% - 0s 0 0 13.42306 0 91 8.00000 13.42306 67.8% - 0s 0 0 13.34924 0 92 8.00000 13.34924 66.9% - 0s 0 0 13.32183 0 92 8.00000 13.32183 66.5% - 0s 0 0 13.31597 0 92 8.00000 13.31597 66.4% - 0s 0 0 13.31536 0 92 8.00000 13.31536 66.4% - 0s 0 0 13.31523 0 92 8.00000 13.31523 66.4% - 0s H 0 0 9.0000000 13.31523 47.9% - 0s 0 2 13.31092 0 92 9.00000 13.31092 47.9% - 0s Cutting planes: Clique: 61 Zero half: 1 Explored 140 nodes (8065 simplex iterations) in 1.17 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%