Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:19 2012 Optimize a model with 315 rows, 116 columns and 630 nonzeros Presolve removed 52 rows and 2 columns Presolve time: 0.00s Presolved: 263 rows, 114 columns, 557 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.250000e+01, 175 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 87 41.00000 52.50000 28.0% - 0s 0 0 51.50000 0 93 41.00000 51.50000 25.6% - 0s H 0 0 44.0000000 51.50000 17.0% - 0s 0 0 51.13514 0 110 44.00000 51.13514 16.2% - 0s 0 0 50.27273 0 109 44.00000 50.27273 14.3% - 0s 0 0 49.99296 0 110 44.00000 49.99296 13.6% - 0s 0 0 49.57360 0 111 44.00000 49.57360 12.7% - 0s 0 0 49.23077 0 104 44.00000 49.23077 11.9% - 0s 0 0 48.82432 0 109 44.00000 48.82432 11.0% - 0s 0 0 48.74214 0 109 44.00000 48.74214 10.8% - 0s 0 0 48.68056 0 105 44.00000 48.68056 10.6% - 0s H 0 0 45.0000000 48.68056 8.18% - 0s 0 0 48.63441 0 106 45.00000 48.63441 8.08% - 0s 0 0 48.63441 0 106 45.00000 48.63441 8.08% - 0s H 0 0 46.0000000 48.63441 5.73% - 0s 0 2 48.63441 0 105 46.00000 48.63441 5.73% - 0s * 36 3 5 47.0000000 48.00000 2.13% 22.4 0s Cutting planes: Gomory: 1 Zero half: 72 Explored 40 nodes (1536 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%