Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:43:46 2012 Optimize a model with 1 rows, 176 columns and 176 nonzeros Model has 147 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 148 rows, 295 columns, 589 nonzeros Variable types: 0 continuous, 295 integer (294 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 0.000000e+00, 182 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 35 31.00000 0.00000 100% - 0s 0 0 0.00000 0 31 31.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 19.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 13.00000 0.00000 100% - 0s 0 0 0.00000 0 31 13.00000 0.00000 100% - 0s 0 0 0.00000 0 31 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 29 12.00000 0.00000 100% - 0s H 27 27 10.0000000 0.00000 100% 2.6 0s * 69 58 28 9.0000000 0.00000 100% 2.4 0s H 81 48 8.0000000 0.00000 100% 2.5 0s H 271 151 7.0000000 0.00000 100% 7.5 0s H 298 93 5.0000000 0.00000 100% 7.8 0s H 451 96 4.0000000 0.00000 100% 8.6 0s H 543 70 3.0000000 0.38710 87.1% 11.2 0s * 581 5 12 2.0000000 1.00000 50.0% 14.8 0s Cutting planes: Cover: 254 MIR: 2 Zero half: 3 Explored 587 nodes (9010 simplex iterations) in 0.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%