Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:35:56 2012 Optimize a model with 1 rows, 166 columns and 166 nonzeros Model has 139 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 140 rows, 278 columns, 556 nonzeros Variable types: 0 continuous, 278 integer (277 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 0.000000e+00, 167 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 38.00000 0.00000 100% - 0s 0 0 0.00000 0 35 38.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s 0 0 0.00000 0 40 33.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 20.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 17.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 11.00000 0.00000 100% - 0s 0 0 0.00000 0 14 11.00000 0.00000 100% - 0s 0 0 0.00000 0 14 11.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 2 0.00000 0 14 8.00000 0.00000 100% - 0s H 54 32 7.0000000 0.00000 100% 2.7 0s H 81 41 6.0000000 0.00000 100% 3.5 0s * 257 79 21 5.0000000 0.00000 100% 5.0 0s H 435 109 3.0000000 0.00000 100% 6.2 0s H 495 61 2.0000000 0.18182 90.9% 7.7 0s H 500 0 1.0000000 0.36842 63.2% 7.7 0s Cutting planes: Cover: 238 MIR: 2 Zero half: 1 Explored 500 nodes (4486 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+00, best bound 1.000000000000e+00, gap 0.0%