Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:17 2012 Optimize a model with 332 rows, 113 columns and 664 nonzeros Presolve removed 72 rows and 4 columns Presolve time: 0.00s Presolved: 260 rows, 109 columns, 557 nonzeros Variable types: 0 continuous, 109 integer (109 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.000000e+01, 163 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50.00000 0 84 42.00000 50.00000 19.0% - 0s 0 0 48.00000 0 82 42.00000 48.00000 14.3% - 0s 0 0 48.00000 0 97 42.00000 48.00000 14.3% - 0s H 0 0 43.0000000 48.00000 11.6% - 0s H 0 0 44.0000000 48.00000 9.09% - 0s 0 0 47.62319 0 104 44.00000 47.62319 8.23% - 0s 0 0 47.44369 0 107 44.00000 47.44369 7.83% - 0s 0 0 47.07635 0 108 44.00000 47.07635 6.99% - 0s 0 0 46.83333 0 106 44.00000 46.83333 6.44% - 0s 0 0 46.79177 0 106 44.00000 46.79177 6.34% - 0s 0 0 46.63636 0 107 44.00000 46.63636 5.99% - 0s 0 0 46.58416 0 106 44.00000 46.58416 5.87% - 0s 0 0 46.57143 0 106 44.00000 46.57143 5.84% - 0s 0 0 46.57143 0 104 44.00000 46.57143 5.84% - 0s 0 2 46.57143 0 104 44.00000 46.57143 5.84% - 0s * 11 5 7 45.0000000 46.37879 3.06% 25.6 0s Cutting planes: Gomory: 2 Zero half: 53 Explored 20 nodes (1196 simplex iterations) in 0.07 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%