Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:29 2012 Optimize a model with 380 rows, 124 columns and 760 nonzeros Presolve removed 56 rows and 0 columns Presolve time: 0.00s Presolved: 324 rows, 124 columns, 684 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.400000e+01, 162 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.00000 0 106 41.00000 54.00000 31.7% - 0s 0 0 51.72222 0 120 41.00000 51.72222 26.2% - 0s 0 0 51.37500 0 123 41.00000 51.37500 25.3% - 0s 0 0 51.04167 0 123 41.00000 51.04167 24.5% - 0s 0 0 50.39649 0 122 41.00000 50.39649 22.9% - 0s 0 0 50.06292 0 123 41.00000 50.06292 22.1% - 0s H 0 0 42.0000000 50.06292 19.2% - 0s 0 0 49.77699 0 121 42.00000 49.77699 18.5% - 0s 0 0 49.60490 0 123 42.00000 49.60490 18.1% - 0s H 0 0 43.0000000 49.60490 15.4% - 0s 0 0 49.51932 0 122 43.00000 49.51932 15.2% - 0s 0 0 49.42152 0 121 43.00000 49.42152 14.9% - 0s 0 0 49.35104 0 122 43.00000 49.35104 14.8% - 0s 0 0 49.28807 0 122 43.00000 49.28807 14.6% - 0s 0 0 49.28807 0 120 43.00000 49.28807 14.6% - 0s 0 2 49.28444 0 120 43.00000 49.28444 14.6% - 0s * 12 10 8 44.0000000 49.09538 11.6% 31.9 0s * 43 19 8 45.0000000 48.92623 8.72% 28.4 0s * 151 1 3 47.0000000 48.14653 2.44% 25.8 0s Cutting planes: Gomory: 1 Zero half: 104 Explored 153 nodes (4891 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%