Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:21 2012 Optimize a model with 355 rows, 118 columns and 710 nonzeros Presolve removed 66 rows and 2 columns Presolve time: 0.00s Presolved: 289 rows, 116 columns, 616 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.100000e+01, 167 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.00000 0 96 41.00000 51.00000 24.4% - 0s 0 0 50.14474 0 107 41.00000 50.14474 22.3% - 0s H 0 0 42.0000000 50.14474 19.4% - 0s 0 0 49.47727 0 113 42.00000 49.47727 17.8% - 0s H 0 0 43.0000000 49.47727 15.1% - 0s 0 0 48.88000 0 114 43.00000 48.88000 13.7% - 0s H 0 0 44.0000000 48.88000 11.1% - 0s 0 0 48.24270 0 113 44.00000 48.24270 9.64% - 0s 0 0 48.00000 0 112 44.00000 48.00000 9.09% - 0s H 0 0 46.0000000 48.00000 4.35% - 0s 0 0 47.86047 0 110 46.00000 47.86047 4.04% - 0s 0 0 47.76852 0 106 46.00000 47.76852 3.84% - 0s 0 0 47.72619 0 111 46.00000 47.72619 3.75% - 0s 0 0 47.67273 0 111 46.00000 47.67273 3.64% - 0s 0 0 47.64211 0 110 46.00000 47.64211 3.57% - 0s 0 0 47.55556 0 106 46.00000 47.55556 3.38% - 0s 0 0 47.48819 0 110 46.00000 47.48819 3.24% - 0s 0 0 47.44286 0 107 46.00000 47.44286 3.14% - 0s 0 0 47.41797 0 110 46.00000 47.41797 3.08% - 0s 0 0 47.41797 0 110 46.00000 47.41797 3.08% - 0s 0 2 47.41797 0 110 46.00000 47.41797 3.08% - 0s Cutting planes: Zero half: 44 Explored 9 nodes (1040 simplex iterations) in 0.08 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%