Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:33 2012 Optimize a model with 977 rows, 62 columns and 1954 nonzeros Presolve removed 691 rows and 0 columns Presolve time: 0.02s Presolved: 286 rows, 62 columns, 1768 nonzeros Variable types: 0 continuous, 62 integer (62 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.006536e+01, 150 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.06536 0 51 6.00000 10.06536 67.8% - 0s H 0 0 7.0000000 10.06536 43.8% - 0s 0 0 9.69281 0 56 7.00000 9.69281 38.5% - 0s H 0 0 8.0000000 9.69281 21.2% - 0s 0 0 9.62524 0 55 8.00000 9.62524 20.3% - 0s 0 0 9.60981 0 57 8.00000 9.60981 20.1% - 0s 0 0 9.60002 0 58 8.00000 9.60002 20.0% - 0s 0 0 9.58786 0 57 8.00000 9.58786 19.8% - 0s 0 0 9.58302 0 57 8.00000 9.58302 19.8% - 0s 0 0 9.57884 0 58 8.00000 9.57884 19.7% - 0s 0 0 9.57884 0 58 8.00000 9.57884 19.7% - 0s 0 2 9.57487 0 58 8.00000 9.57487 19.7% - 0s Cutting planes: Gomory: 3 Clique: 24 Zero half: 6 Explored 9 nodes (720 simplex iterations) in 0.15 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%