Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:27 2012 Optimize a model with 842 rows, 59 columns and 1684 nonzeros Presolve removed 583 rows and 0 columns Presolve time: 0.01s Presolved: 259 rows, 59 columns, 1458 nonzeros Variable types: 0 continuous, 59 integer (59 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.025219e+01, 133 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.25219 0 53 6.00000 10.25219 70.9% - 0s H 0 0 7.0000000 10.25219 46.5% - 0s H 0 0 8.0000000 10.25219 28.2% - 0s 0 0 9.95063 0 55 8.00000 9.95063 24.4% - 0s 0 0 9.83288 0 56 8.00000 9.83288 22.9% - 0s 0 0 9.80146 0 58 8.00000 9.80146 22.5% - 0s 0 0 9.79587 0 57 8.00000 9.79587 22.4% - 0s 0 0 9.79020 0 58 8.00000 9.79020 22.4% - 0s 0 0 9.78916 0 58 8.00000 9.78916 22.4% - 0s 0 2 9.78896 0 58 8.00000 9.78896 22.4% - 0s Cutting planes: Clique: 26 Zero half: 11 Explored 16 nodes (840 simplex iterations) in 0.12 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%