Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:04:20 2012 Optimize a model with 577 rows, 522 columns and 1962 nonzeros Presolve removed 0 rows and 14 columns Presolve time: 0.00s Presolved: 577 rows, 508 columns, 1948 nonzeros Variable types: 0 continuous, 508 integer (507 binary) Found heuristic solution: objective 117.0000000 Root relaxation: objective 0.000000e+00, 313 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 0 210 117.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.46276 0 211 72.00000 0.46276 99.4% - 0s H 0 0 64.0000000 0.46276 99.3% - 0s 0 0 0.82093 0 216 64.00000 0.82093 98.7% - 0s H 0 0 61.0000000 0.82093 98.7% - 0s 0 0 0.82093 0 216 61.00000 0.82093 98.7% - 0s 0 0 0.82093 0 216 61.00000 0.82093 98.7% - 0s H 0 0 60.0000000 0.82093 98.6% - 0s 0 2 0.82276 0 216 60.00000 0.82276 98.6% - 0s H 27 27 48.0000000 1.75202 96.3% 50.5 0s * 56 50 31 26.0000000 1.75202 93.3% 35.6 0s * 105 76 27 25.0000000 1.80342 92.8% 32.2 0s * 386 205 24 23.0000000 7.04348 69.4% 32.7 0s 2654 740 19.87349 22 203 23.00000 12.37838 46.2% 28.9 5s 5744 1179 19.40000 19 201 23.00000 15.00000 34.8% 26.8 10s 8858 1372 18.58333 18 211 23.00000 16.34783 28.9% 26.6 15s 12204 1296 21.97619 21 205 23.00000 17.44118 24.2% 26.6 20s 15326 1003 21.16296 23 171 23.00000 18.27273 20.6% 26.6 25s 18853 129 cutoff 22 23.00000 21.12500 8.15% 26.9 30s Explored 18991 nodes (512129 simplex iterations) in 30.15 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%