Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:42:41 2012 Optimize a model with 1 rows, 175 columns and 175 nonzeros Model has 160 quadratic objective terms Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 161 rows, 311 columns, 631 nonzeros Variable types: 0 continuous, 311 integer (310 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 0.000000e+00, 204 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 51 46.00000 0.00000 100% - 0s 0 0 0.00000 0 30 46.00000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s 0 0 0.00000 0 54 29.00000 0.00000 100% - 0s 0 0 0.00000 0 23 29.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 2 0.00000 0 16 16.00000 0.00000 100% - 0s H 22 22 14.0000000 0.00000 100% 1.7 0s H 32 32 13.0000000 0.00000 100% 1.5 0s H 81 61 10.0000000 0.00000 100% 2.2 0s H 216 125 8.0000000 0.00000 100% 4.4 0s H 351 177 7.0000000 0.00000 100% 5.9 0s H 2135 1058 6.0000000 0.00000 100% 4.1 0s H 2851 1245 5.0000000 0.00000 100% 3.4 0s H 3018 1085 4.0000000 0.00000 100% 3.3 0s 40814 13874 2.00000 37 275 4.00000 1.00000 75.0% 1.6 5s Cutting planes: Gomory: 112 Cover: 201 MIR: 79 Flow cover: 111 Zero half: 244 Explored 40917 nodes (78630 simplex iterations) in 6.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%