Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:01:19 2012 Optimize a model with 553 rows, 501 columns and 1881 nonzeros Presolve removed 0 rows and 21 columns Presolve time: 0.00s Presolved: 553 rows, 480 columns, 1860 nonzeros Variable types: 0 continuous, 480 integer (479 binary) Found heuristic solution: objective 110.0000000 Root relaxation: objective 0.000000e+00, 269 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 0 199 110.00000 0.00000 100% - 0s H 0 0 94.0000000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 78.0000000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s 0 0 0.31913 0 201 70.00000 0.31913 100% - 0s H 0 0 68.0000000 0.31913 100% - 0s 0 0 0.88355 0 202 68.00000 0.88355 98.7% - 0s 0 0 0.88406 0 204 68.00000 0.88406 98.7% - 0s 0 0 0.88406 0 203 68.00000 0.88406 98.7% - 0s 0 2 0.88551 0 203 68.00000 0.88551 98.7% - 0s H 27 27 52.0000000 1.00000 98.1% 43.0 0s H 54 54 28.0000000 1.00000 96.4% 31.4 0s * 61 43 39 25.0000000 1.00000 96.0% 33.5 0s H 299 186 24.0000000 1.00000 95.8% 38.1 0s 2830 1086 20.77419 28 196 24.00000 12.91509 46.2% 27.5 5s 6022 1953 cutoff 29 24.00000 15.15646 36.8% 25.4 10s * 9210 2190 35 23.0000000 16.22876 29.4% 25.0 14s 9312 2187 19.94286 23 170 23.00000 16.26667 29.3% 25.0 15s 12610 1962 21.19540 25 214 23.00000 17.37288 24.5% 25.4 20s 15913 1460 cutoff 28 23.00000 18.63934 19.0% 25.9 25s Explored 19329 nodes (494562 simplex iterations) in 29.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%