Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:20 2012 Optimize a model with 319 rows, 117 columns and 638 nonzeros Presolve removed 45 rows and 0 columns Presolve time: 0.00s Presolved: 274 rows, 117 columns, 573 nonzeros Variable types: 0 continuous, 117 integer (117 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.250000e+01, 148 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52.50000 0 91 41.00000 52.50000 28.0% - 0s H 0 0 42.0000000 52.50000 25.0% - 0s 0 0 51.26667 0 110 42.00000 51.26667 22.1% - 0s H 0 0 45.0000000 51.26667 13.9% - 0s 0 0 50.75610 0 111 45.00000 50.75610 12.8% - 0s H 0 0 46.0000000 50.75610 10.3% - 0s 0 0 50.16667 0 110 46.00000 50.16667 9.06% - 0s 0 0 50.10417 0 111 46.00000 50.10417 8.92% - 0s H 0 0 47.0000000 50.10417 6.60% - 0s 0 0 49.96800 0 111 47.00000 49.96800 6.31% - 0s 0 0 49.89041 0 111 47.00000 49.89041 6.15% - 0s 0 0 49.74026 0 113 47.00000 49.74026 5.83% - 0s 0 0 49.68421 0 112 47.00000 49.68421 5.71% - 0s 0 0 49.59259 0 112 47.00000 49.59259 5.52% - 0s 0 0 49.46341 0 110 47.00000 49.46341 5.24% - 0s 0 0 49.45574 0 110 47.00000 49.45574 5.22% - 0s 0 0 49.45574 0 109 47.00000 49.45574 5.22% - 0s 0 2 49.44865 0 109 47.00000 49.44865 5.21% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 48 Explored 31 nodes (1505 simplex iterations) in 0.08 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%