Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:40 2012 Optimize a model with 1 rows, 56 columns and 56 nonzeros Model has 104 quadratic objective terms Presolve time: 0.00s Presolved: 105 rows, 160 columns, 368 nonzeros Variable types: 0 continuous, 160 integer (160 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 145 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 40 43.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 38.0000000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.00000 0 42 37.00000 0.00000 100% - 0s 0 0 0.00000 0 40 37.00000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 2 0.00000 0 30 30.00000 0.00000 100% - 0s H 39 39 27.0000000 0.00000 100% 2.2 0s H 102 82 24.0000000 0.00000 100% 4.5 0s H 200 127 21.0000000 0.00000 100% 6.9 0s * 247 141 10 20.0000000 0.00000 100% 8.6 0s * 271 137 15 19.0000000 0.00000 100% 9.0 0s H 402 142 18.0000000 3.00000 83.3% 12.9 0s H 516 103 17.0000000 7.00000 58.8% 16.8 0s * 536 60 8 15.0000000 8.50000 43.3% 18.7 0s Cutting planes: Gomory: 3 Cover: 199 Explored 630 nodes (12256 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%