Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:28 2012 Optimize a model with 860 rows, 59 columns and 1720 nonzeros Presolve removed 605 rows and 0 columns Presolve time: 0.01s Presolved: 255 rows, 59 columns, 1460 nonzeros Variable types: 0 continuous, 59 integer (59 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.026517e+01, 116 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.26517 0 56 7.00000 10.26517 46.6% - 0s 0 0 9.99107 0 58 7.00000 9.99107 42.7% - 0s 0 0 9.92632 0 59 7.00000 9.92632 41.8% - 0s 0 0 9.91932 0 58 7.00000 9.91932 41.7% - 0s 0 0 9.90757 0 58 7.00000 9.90757 41.5% - 0s 0 0 9.90211 0 56 7.00000 9.90211 41.5% - 0s 0 0 9.89764 0 56 7.00000 9.89764 41.4% - 0s 0 0 9.89744 0 56 7.00000 9.89744 41.4% - 0s H 0 0 8.0000000 9.89744 23.7% - 0s 0 2 9.89594 0 56 8.00000 9.89594 23.7% - 0s Cutting planes: Gomory: 3 Clique: 20 Zero half: 4 Explored 11 nodes (762 simplex iterations) in 0.14 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%