Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:27 2012 Optimize a model with 379 rows, 123 columns and 758 nonzeros Presolve removed 85 rows and 4 columns Presolve time: 0.00s Presolved: 294 rows, 119 columns, 633 nonzeros Variable types: 0 continuous, 119 integer (119 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.325000e+01, 182 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53.25000 0 96 43.00000 53.25000 23.8% - 0s 0 0 52.25000 0 101 43.00000 52.25000 21.5% - 0s 0 0 51.69444 0 115 43.00000 51.69444 20.2% - 0s H 0 0 47.0000000 51.69444 10.0% - 0s 0 0 50.75000 0 110 47.00000 50.75000 7.98% - 0s 0 0 50.48649 0 106 47.00000 50.48649 7.42% - 0s 0 0 50.37500 0 109 47.00000 50.37500 7.18% - 0s 0 0 50.24458 0 118 47.00000 50.24458 6.90% - 0s 0 0 50.12000 0 116 47.00000 50.12000 6.64% - 0s 0 0 49.89082 0 117 47.00000 49.89082 6.15% - 0s 0 0 49.66033 0 116 47.00000 49.66033 5.66% - 0s 0 0 49.52336 0 116 47.00000 49.52336 5.37% - 0s 0 0 49.38938 0 111 47.00000 49.38938 5.08% - 0s 0 0 49.30406 0 115 47.00000 49.30406 4.90% - 0s 0 0 49.27868 0 116 47.00000 49.27868 4.85% - 0s 0 0 49.27868 0 114 47.00000 49.27868 4.85% - 0s 0 2 49.27706 0 114 47.00000 49.27706 4.84% - 0s Cutting planes: Clique: 1 Zero half: 59 Explored 34 nodes (1702 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%