Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:56:35 2012 Optimize a model with 557 rows, 502 columns and 1892 nonzeros Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 557 rows, 479 columns, 1869 nonzeros Variable types: 0 continuous, 479 integer (478 binary) Found heuristic solution: objective 105.0000000 Root relaxation: objective 0.000000e+00, 282 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 0 196 105.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 0.32176 0 198 85.00000 0.32176 100% - 0s H 0 0 71.0000000 0.32176 100% - 0s H 0 0 64.0000000 0.32176 99.5% - 0s 0 0 0.82889 0 200 64.00000 0.82889 98.7% - 0s H 0 0 54.0000000 0.82889 98.5% - 0s 0 0 0.82889 0 200 54.00000 0.82889 98.5% - 0s H 0 0 40.0000000 0.82889 97.9% - 0s 0 2 0.83025 0 200 40.00000 0.83025 97.9% - 0s H 54 49 27.0000000 1.00000 96.3% 36.0 0s * 186 138 33 25.0000000 1.00000 96.0% 34.9 0s * 383 227 30 24.0000000 4.54930 81.0% 35.7 0s H 767 377 23.0000000 7.86705 65.8% 34.1 1s 3040 1093 18.66860 27 211 23.00000 14.38961 37.4% 24.1 5s 6595 1925 20.96386 26 206 23.00000 16.06667 30.1% 21.6 10s 9916 1704 19.40828 26 208 23.00000 17.25984 25.0% 22.4 15s 13171 1102 20.06024 27 204 23.00000 18.73684 18.5% 23.8 20s *13957 652 41 22.0000000 19.29771 12.3% 24.2 21s Explored 15005 nodes (355886 simplex iterations) in 22.92 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%