Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:14 2012 Optimize a model with 283 rows, 108 columns and 566 nonzeros Presolve removed 42 rows and 7 columns Presolve time: 0.00s Presolved: 241 rows, 101 columns, 493 nonzeros Variable types: 0 continuous, 101 integer (101 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 4.900000e+01, 126 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49.00000 0 72 42.00000 49.00000 16.7% - 0s 0 0 48.50000 0 83 42.00000 48.50000 15.5% - 0s 0 0 48.16667 0 98 42.00000 48.16667 14.7% - 0s H 0 0 43.0000000 48.16667 12.0% - 0s 0 0 47.00000 0 66 43.00000 47.00000 9.30% - 0s 0 0 46.81250 0 100 43.00000 46.81250 8.87% - 0s 0 0 46.68421 0 100 43.00000 46.68421 8.57% - 0s 0 0 46.18750 0 94 43.00000 46.18750 7.41% - 0s H 0 0 44.0000000 46.18750 4.97% - 0s 0 0 46.06522 0 100 44.00000 46.06522 4.69% - 0s 0 0 45.95833 0 99 44.00000 45.95833 4.45% - 0s 0 0 45.94444 0 98 44.00000 45.94444 4.42% - 0s 0 0 45.89744 0 84 44.00000 45.89744 4.31% - 0s 0 0 45.87764 0 98 44.00000 45.87764 4.27% - 0s 0 0 45.87764 0 98 44.00000 45.87764 4.27% - 0s 0 2 45.87764 0 98 44.00000 45.87764 4.27% - 0s * 25 2 5 45.0000000 45.70498 1.57% 17.4 0s Cutting planes: Gomory: 1 Zero half: 68 Explored 26 nodes (1069 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%