Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:13 2012 Optimize a model with 299 rows, 107 columns and 598 nonzeros Presolve removed 66 rows and 12 columns Presolve time: 0.00s Presolved: 233 rows, 95 columns, 480 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 4.900000e+01, 123 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 76 40.00000 49.00000 22.5% - 0s 0 0 47.66667 0 85 40.00000 47.66667 19.2% - 0s H 0 0 42.0000000 47.66667 13.5% - 0s 0 0 47.00000 0 70 42.00000 47.00000 11.9% - 0s 0 0 46.69048 0 92 42.00000 46.69048 11.2% - 0s H 0 0 43.0000000 46.69048 8.58% - 0s 0 0 46.00000 0 72 43.00000 46.00000 6.98% - 0s H 0 0 44.0000000 46.00000 4.55% - 0s 0 0 45.90000 0 87 44.00000 45.90000 4.32% - 0s 0 0 45.83333 0 88 44.00000 45.83333 4.17% - 0s 0 0 45.74468 0 90 44.00000 45.74468 3.97% - 0s 0 0 45.65909 0 92 44.00000 45.65909 3.77% - 0s 0 0 45.60000 0 95 44.00000 45.60000 3.64% - 0s 0 0 45.60000 0 94 44.00000 45.60000 3.64% - 0s 0 0 45.59044 0 95 44.00000 45.59044 3.61% - 0s 0 0 45.59044 0 91 44.00000 45.59044 3.61% - 0s 0 2 45.57789 0 91 44.00000 45.57789 3.59% - 0s Cutting planes: Gomory: 1 Zero half: 37 Explored 9 nodes (669 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.400000000000e+01, best bound 4.400000000000e+01, gap 0.0%