Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:48:29 2012 Optimize a model with 523 rows, 483 columns and 1788 nonzeros Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 523 rows, 459 columns, 1764 nonzeros Variable types: 0 continuous, 459 integer (458 binary) Found heuristic solution: objective 89.0000000 Root relaxation: objective 0.000000e+00, 271 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 89.00000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.39828 0 190 72.00000 0.39828 99.4% - 0s H 0 0 66.0000000 0.39828 99.4% - 0s 0 0 1.00744 0 192 66.00000 1.00744 98.5% - 0s H 0 0 58.0000000 1.00744 98.3% - 0s 0 0 1.22946 0 193 58.00000 1.22946 97.9% - 0s H 0 0 48.0000000 1.22946 97.4% - 0s 0 0 1.23181 0 195 48.00000 1.23181 97.4% - 0s 0 0 1.23181 0 195 48.00000 1.23181 97.4% - 0s H 0 0 46.0000000 1.23181 97.3% - 0s H 0 0 43.0000000 1.23181 97.1% - 0s H 0 0 35.0000000 1.23181 96.5% - 0s 0 2 1.23325 0 193 35.00000 1.23325 96.5% - 0s H 27 27 30.0000000 1.30355 95.7% 53.7 0s H 54 54 29.0000000 1.30355 95.5% 37.0 0s * 59 53 34 24.0000000 1.30355 94.6% 34.6 0s * 197 134 30 23.0000000 1.45400 93.7% 33.9 0s * 253 146 29 21.0000000 1.48312 92.9% 33.8 0s * 672 307 26 20.0000000 4.17866 79.1% 36.4 1s 2856 161 18.59574 25 177 20.00000 15.04762 24.8% 29.8 5s Explored 3346 nodes (97583 simplex iterations) in 5.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%