Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:17:41 2012 Optimize a model with 557 rows, 514 columns and 1904 nonzeros Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 557 rows, 487 columns, 1877 nonzeros Variable types: 0 continuous, 487 integer (486 binary) Found heuristic solution: objective 109.0000000 Root relaxation: objective 0.000000e+00, 280 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 0 200 109.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.38013 0 203 72.00000 0.38013 99.5% - 0s H 0 0 60.0000000 0.38013 99.4% - 0s 0 0 0.99119 0 207 60.00000 0.99119 98.3% - 0s H 0 0 46.0000000 0.99119 97.8% - 0s 0 0 0.99119 0 207 46.00000 0.99119 97.8% - 0s 0 2 0.99252 0 207 46.00000 0.99252 97.8% - 0s H 27 27 41.0000000 1.00000 97.6% 40.0 0s H 108 100 29.0000000 1.00000 96.6% 23.4 0s * 115 69 68 28.0000000 1.00000 96.4% 23.2 0s H 194 115 26.0000000 1.25854 95.2% 26.9 0s H 544 291 24.0000000 2.24560 90.6% 29.8 0s * 1875 647 31 23.0000000 10.38710 54.8% 28.8 3s 2785 936 18.92216 24 204 23.00000 12.22857 46.8% 27.5 5s 5934 1549 cutoff 28 23.00000 14.65693 36.3% 25.8 10s 9118 1898 19.79618 25 194 23.00000 15.95349 30.6% 25.3 15s 12705 2029 21.16766 25 205 23.00000 17.00000 26.1% 24.6 20s 16357 1913 20.56522 26 151 23.00000 17.76744 22.8% 24.3 25s *17675 1593 30 22.0000000 18.00000 18.2% 24.4 26s 19690 1073 19.28358 27 172 22.00000 18.80000 14.5% 24.4 30s Explored 21672 nodes (525961 simplex iterations) in 32.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%