Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:15 2012 Optimize a model with 2295 rows, 96 columns and 4590 nonzeros Presolve removed 1608 rows and 0 columns Presolve time: 0.06s Presolved: 687 rows, 96 columns, 4587 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.370967e+01, 375 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.70967 0 91 7.00000 13.70967 95.9% - 0s H 0 0 8.0000000 13.70967 71.4% - 0s 0 0 13.35224 0 95 8.00000 13.35224 66.9% - 0s 0 0 13.30357 0 94 8.00000 13.30357 66.3% - 0s 0 0 13.28888 0 94 8.00000 13.28888 66.1% - 0s 0 0 13.28650 0 95 8.00000 13.28650 66.1% - 0s 0 0 13.28605 0 95 8.00000 13.28605 66.1% - 0s 0 2 13.28533 0 95 8.00000 13.28533 66.1% - 0s * 78 38 7 9.0000000 12.65251 40.6% 53.8 1s Cutting planes: Clique: 59 Explored 162 nodes (9336 simplex iterations) in 1.24 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%