Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:17:45 2012 Optimize a model with 501 rows, 462 columns and 1712 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 501 rows, 444 columns, 1694 nonzeros Variable types: 0 continuous, 444 integer (443 binary) Found heuristic solution: objective 101.0000000 Root relaxation: objective 0.000000e+00, 238 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 0 189 101.00000 0.00000 100% - 0s H 0 0 82.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s 0 0 0.33069 0 191 69.00000 0.33069 100% - 0s H 0 0 64.0000000 0.33069 99.5% - 0s 0 0 0.89489 0 195 64.00000 0.89489 98.6% - 0s H 0 0 59.0000000 0.89489 98.5% - 0s H 0 0 41.0000000 0.89489 97.8% - 0s 0 0 0.89520 0 197 41.00000 0.89520 97.8% - 0s 0 0 0.89520 0 197 41.00000 0.89520 97.8% - 0s 0 2 0.89520 0 197 41.00000 0.89520 97.8% - 0s H 27 27 33.0000000 1.00000 97.0% 36.2 0s H 54 54 29.0000000 1.00000 96.6% 26.9 0s H 107 69 26.0000000 1.00000 96.2% 18.2 0s H 109 46 24.0000000 1.00000 95.8% 17.9 0s H 182 81 22.0000000 1.00000 95.5% 19.5 0s * 231 98 32 21.0000000 1.00000 95.2% 20.1 0s H 275 96 18.0000000 1.07905 94.0% 23.7 0s 3675 1008 15.41975 19 185 18.00000 11.80451 34.4% 20.9 5s 7790 1145 cutoff 24 18.00000 13.83871 23.1% 20.1 10s Explored 12165 nodes (238200 simplex iterations) in 14.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%