Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:15 2012 Optimize a model with 283 rows, 110 columns and 566 nonzeros Presolve removed 58 rows and 5 columns Presolve time: 0.00s Presolved: 225 rows, 105 columns, 471 nonzeros Variable types: 0 continuous, 105 integer (105 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 4.950000e+01, 138 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49.50000 0 69 41.00000 49.50000 20.7% - 0s H 0 0 44.0000000 49.50000 12.5% - 0s H 0 0 45.0000000 49.50000 10.0% - 0s 0 0 47.83333 0 96 45.00000 47.83333 6.30% - 0s 0 0 47.57143 0 103 45.00000 47.57143 5.71% - 0s 0 0 47.48148 0 103 45.00000 47.48148 5.51% - 0s 0 0 47.12500 0 97 45.00000 47.12500 4.72% - 0s 0 0 46.91667 0 100 45.00000 46.91667 4.26% - 0s 0 0 46.85714 0 94 45.00000 46.85714 4.13% - 0s 0 0 46.75000 0 93 45.00000 46.75000 3.89% - 0s 0 0 46.69643 0 103 45.00000 46.69643 3.77% - 0s 0 0 46.66667 0 102 45.00000 46.66667 3.70% - 0s 0 0 46.47059 0 89 45.00000 46.47059 3.27% - 0s 0 0 46.42857 0 92 45.00000 46.42857 3.17% - 0s 0 0 46.40000 0 102 45.00000 46.40000 3.11% - 0s 0 0 46.40000 0 100 45.00000 46.40000 3.11% - 0s H 0 0 46.0000000 46.40000 0.87% - 0s Cutting planes: Gomory: 2 Zero half: 28 Explored 0 nodes (549 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%