Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012 Optimize a model with 324 rows, 112 columns and 648 nonzeros Presolve removed 73 rows and 5 columns Presolve time: 0.00s Presolved: 251 rows, 107 columns, 539 nonzeros Variable types: 0 continuous, 107 integer (107 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 4.775000e+01, 172 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47.75000 0 71 39.00000 47.75000 22.4% - 0s 0 0 46.83333 0 95 39.00000 46.83333 20.1% - 0s H 0 0 42.0000000 46.83333 11.5% - 0s 0 0 46.39474 0 101 42.00000 46.39474 10.5% - 0s 0 0 46.16667 0 97 42.00000 46.16667 9.92% - 0s 0 0 46.00000 0 102 42.00000 46.00000 9.52% - 0s 0 0 45.89655 0 99 42.00000 45.89655 9.28% - 0s 0 0 45.75000 0 101 42.00000 45.75000 8.93% - 0s 0 0 45.70400 0 105 42.00000 45.70400 8.82% - 0s 0 0 45.66667 0 106 42.00000 45.66667 8.73% - 0s 0 0 45.63736 0 106 42.00000 45.63736 8.66% - 0s 0 0 45.63736 0 106 42.00000 45.63736 8.66% - 0s 0 2 45.62069 0 106 42.00000 45.62069 8.62% - 0s H 18 6 43.0000000 45.38255 5.54% 22.3 0s H 23 5 44.0000000 45.38255 3.14% 21.5 0s Cutting planes: Gomory: 3 Zero half: 39 Explored 29 nodes (1211 simplex iterations) in 0.07 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%