Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:18:40 2012 Optimize a model with 543 rows, 507 columns and 1862 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 543 rows, 489 columns, 1844 nonzeros Variable types: 0 continuous, 489 integer (488 binary) Found heuristic solution: objective 111.0000000 Root relaxation: objective 0.000000e+00, 296 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 0 202 111.00000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s 0 0 0.24010 0 204 68.00000 0.24010 100% - 0s H 0 0 66.0000000 0.24010 100% - 0s 0 0 0.75358 0 205 66.00000 0.75358 98.9% - 0s H 0 0 58.0000000 0.75358 98.7% - 0s 0 0 0.75439 0 209 58.00000 0.75439 98.7% - 0s 0 0 0.75439 0 209 58.00000 0.75439 98.7% - 0s H 0 0 54.0000000 0.75439 98.6% - 0s 0 2 0.75493 0 206 54.00000 0.75493 98.6% - 0s H 27 27 53.0000000 0.88630 98.3% 42.4 0s * 45 43 25 20.0000000 0.88630 95.6% 36.0 0s * 99 69 17 19.0000000 1.00000 94.7% 35.1 0s * 249 152 20 18.0000000 2.56140 85.8% 38.0 0s 3326 897 16.16770 30 191 18.00000 11.26415 37.4% 24.5 5s 7416 1519 13.26316 23 196 18.00000 12.79412 28.9% 20.6 10s 11543 1719 16.75497 29 174 18.00000 13.88000 22.9% 20.4 15s 15838 1614 15.74359 30 176 18.00000 14.76101 18.0% 19.6 20s 20914 745 cutoff 26 18.00000 16.00000 11.1% 19.0 25s Explored 22253 nodes (421224 simplex iterations) in 26.44 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%