Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:22 2012 Optimize a model with 1509 rows, 77 columns and 3018 nonzeros Presolve removed 1085 rows and 0 columns Presolve time: 0.03s Presolved: 424 rows, 77 columns, 2822 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Found heuristic solution: objective 9.0000000 Root relaxation: objective 1.180688e+01, 214 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.80688 0 69 9.00000 11.80688 31.2% - 0s 0 0 11.36419 0 74 9.00000 11.36419 26.3% - 0s 0 0 11.29934 0 72 9.00000 11.29934 25.5% - 0s 0 0 11.26197 0 74 9.00000 11.26197 25.1% - 0s 0 0 11.25390 0 73 9.00000 11.25390 25.0% - 0s 0 0 11.24511 0 73 9.00000 11.24511 24.9% - 0s 0 0 11.24359 0 73 9.00000 11.24359 24.9% - 0s 0 0 11.24022 0 73 9.00000 11.24022 24.9% - 0s 0 0 11.23623 0 75 9.00000 11.23623 24.8% - 0s 0 0 11.23466 0 75 9.00000 11.23466 24.8% - 0s 0 0 11.23390 0 75 9.00000 11.23390 24.8% - 0s 0 2 11.23322 0 75 9.00000 11.23322 24.8% - 0s Cutting planes: Clique: 43 Zero half: 2 Explored 17 nodes (1351 simplex iterations) in 0.44 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%