Gurobi 5.0.1 (linux64) logging started Sun Nov 18 10:04:56 2012 Optimize a model with 313 rows, 870 columns and 870 nonzeros Model has 624 quadratic constraints Presolve removed 0 rows and 25 columns Presolve time: 3.68s Presolved: 313 rows, 845 columns, 845 nonzeros Variable types: 624 continuous, 221 integer (220 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 0 152.0000000 - - - 3s 0 0 0.00000 0 8 152.00000 0.00000 100% - 3s 0 0 0.00000 0 76 152.00000 0.00000 100% - 3s 0 0 0.00000 0 16 152.00000 0.00000 100% - 3s 0 2 0.00000 0 153 152.00000 0.00000 100% - 3s H 54 54 33.0000000 2.29457 93.0% 40.0 4s * 58 58 41 30.0000000 2.29457 92.4% 39.0 4s H 474 350 29.0000000 5.66234 80.5% 25.6 4s * 474 333 27 28.0000000 5.66234 79.8% 25.8 4s 605 398 27.34615 18 520 28.00000 6.66937 76.2% 25.9 5s 2080 696 27.07825 42 407 28.00000 15.47561 44.7% 35.1 10s 4142 1400 24.79441 38 511 28.00000 18.22449 34.9% 30.5 15s H 5318 1404 27.0000000 19.20792 28.9% 29.3 17s * 6014 1259 60 26.0000000 19.69781 24.2% 29.1 19s 6205 1253 22.92552 34 532 26.00000 19.85714 23.6% 29.1 20s 7391 1117 23.23377 36 412 26.00000 21.00000 19.2% 29.0 25s 7554 1098 24.37385 35 479 26.00000 21.07291 19.0% 29.1 30s 7778 1062 24.00000 36 494 26.00000 21.24615 18.3% 29.1 35s 7991 1022 24.88107 37 451 26.00000 21.46809 17.4% 29.1 40s 8428 942 24.15789 36 480 26.00000 21.83333 16.0% 29.1 45s 9365 671 cutoff 36 26.00000 22.77755 12.4% 29.2 50s Explored 10391 nodes (300873 simplex iterations) in 54.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%