Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:51 2012 Optimize a model with 447 rows, 134 columns and 894 nonzeros Presolve removed 84 rows and 0 columns Presolve time: 0.00s Presolved: 363 rows, 134 columns, 771 nonzeros Variable types: 0 continuous, 134 integer (134 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.700000e+01, 224 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57.00000 0 108 43.00000 57.00000 32.6% - 0s 0 0 55.63636 0 132 43.00000 55.63636 29.4% - 0s H 0 0 44.0000000 55.63636 26.4% - 0s 0 0 55.19154 0 132 44.00000 55.19154 25.4% - 0s H 0 0 45.0000000 55.19154 22.6% - 0s 0 0 54.70909 0 129 45.00000 54.70909 21.6% - 0s H 0 0 47.0000000 54.70909 16.4% - 0s H 0 0 49.0000000 54.70909 11.7% - 0s 0 0 54.28707 0 134 49.00000 54.28707 10.8% - 0s 0 0 54.07958 0 134 49.00000 54.07958 10.4% - 0s 0 0 53.90323 0 134 49.00000 53.90323 10.0% - 0s 0 0 53.82383 0 133 49.00000 53.82383 9.84% - 0s 0 0 53.75711 0 133 49.00000 53.75711 9.71% - 0s 0 0 53.58674 0 133 49.00000 53.58674 9.36% - 0s 0 0 53.56990 0 133 49.00000 53.56990 9.33% - 0s 0 0 53.56990 0 131 49.00000 53.56990 9.33% - 0s 0 2 53.56584 0 131 49.00000 53.56584 9.32% - 0s * 57 14 5 50.0000000 52.81500 5.63% 32.8 0s Cutting planes: Gomory: 1 Zero half: 94 Explored 122 nodes (4680 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%