Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:03 2012 Optimize a model with 436 rows, 93 columns and 872 nonzeros Presolve removed 138 rows and 0 columns Presolve time: 0.00s Presolved: 298 rows, 93 columns, 712 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.425000e+01, 164 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.25000 0 86 25.00000 34.25000 37.0% - 0s H 0 0 27.0000000 34.25000 26.9% - 0s 0 0 33.58967 0 89 27.00000 33.58967 24.4% - 0s 0 0 33.36866 0 92 27.00000 33.36866 23.6% - 0s 0 0 33.01695 0 92 27.00000 33.01695 22.3% - 0s 0 0 32.73484 0 92 27.00000 32.73484 21.2% - 0s 0 0 32.64058 0 92 27.00000 32.64058 20.9% - 0s 0 0 32.47888 0 92 27.00000 32.47888 20.3% - 0s 0 0 32.35199 0 92 27.00000 32.35199 19.8% - 0s 0 0 32.32543 0 92 27.00000 32.32543 19.7% - 0s 0 0 32.27237 0 92 27.00000 32.27237 19.5% - 0s 0 0 32.22992 0 92 27.00000 32.22992 19.4% - 0s 0 0 32.20966 0 92 27.00000 32.20966 19.3% - 0s 0 0 32.20966 0 92 27.00000 32.20966 19.3% - 0s H 0 0 29.0000000 32.20966 11.1% - 0s 0 2 32.20513 0 92 29.00000 32.20513 11.1% - 0s Cutting planes: Clique: 1 Zero half: 41 Explored 73 nodes (2736 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%