Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:50:10 2012 Optimize a model with 251 rows, 722 columns and 722 nonzeros Model has 500 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 2.92s Presolved: 251 rows, 702 columns, 702 nonzeros Variable types: 500 continuous, 202 integer (201 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 121.0000000 - - - 2s 0 0 0.00000 0 47 121.00000 0.00000 100% - 2s 0 0 0.00000 0 97 121.00000 0.00000 100% - 2s 0 0 0.00000 0 97 121.00000 0.00000 100% - 3s 0 2 0.00000 0 84 121.00000 0.00000 100% - 3s H 48 48 27.0000000 1.90625 92.9% 36.5 3s * 53 51 43 25.0000000 1.90625 92.4% 36.5 3s H 84 74 19.0000000 1.96667 89.6% 28.6 3s * 485 290 26 18.0000000 4.54167 74.8% 18.3 3s 701 387 6.21512 16 97 18.00000 4.88660 72.9% 30.1 5s * 882 394 44 15.0000000 5.79310 61.4% 34.3 5s * 1263 274 37 14.0000000 8.52381 39.1% 32.9 6s Explored 1696 nodes (59069 simplex iterations) in 7.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.400000000000e+01, best bound 1.400000000000e+01, gap 0.0%