Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:27 2012 Optimize a model with 384 rows, 123 columns and 768 nonzeros Presolve removed 73 rows and 6 columns Presolve time: 0.00s Presolved: 311 rows, 117 columns, 653 nonzeros Variable types: 0 continuous, 117 integer (117 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.400000e+01, 172 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.00000 0 96 43.00000 54.00000 25.6% - 0s 0 0 53.50000 0 103 43.00000 53.50000 24.4% - 0s H 0 0 44.0000000 53.50000 21.6% - 0s 0 0 53.15385 0 116 44.00000 53.15385 20.8% - 0s 0 0 52.25806 0 114 44.00000 52.25806 18.8% - 0s H 0 0 45.0000000 52.25806 16.1% - 0s 0 0 51.88889 0 112 45.00000 51.88889 15.3% - 0s 0 0 51.63194 0 117 45.00000 51.63194 14.7% - 0s 0 0 51.07972 0 116 45.00000 51.07972 13.5% - 0s 0 0 50.99197 0 116 45.00000 50.99197 13.3% - 0s 0 0 50.89394 0 116 45.00000 50.89394 13.1% - 0s 0 0 50.83636 0 116 45.00000 50.83636 13.0% - 0s 0 0 50.64706 0 116 45.00000 50.64706 12.5% - 0s 0 0 50.57638 0 117 45.00000 50.57638 12.4% - 0s 0 0 50.56045 0 117 45.00000 50.56045 12.4% - 0s 0 0 50.56045 0 116 45.00000 50.56045 12.4% - 0s H 0 0 46.0000000 50.56045 9.91% - 0s 0 2 50.56045 0 115 46.00000 50.56045 9.91% - 0s * 64 18 9 47.0000000 49.50000 5.32% 29.4 0s Cutting planes: Gomory: 1 Zero half: 94 Explored 112 nodes (3964 simplex iterations) in 0.17 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%