Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:03:08 2012 Optimize a model with 551 rows, 509 columns and 1884 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 551 rows, 487 columns, 1862 nonzeros Variable types: 0 continuous, 487 integer (486 binary) Found heuristic solution: objective 104.0000000 Root relaxation: objective 0.000000e+00, 274 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 0 199 104.00000 0.00000 100% - 0s H 0 0 98.0000000 0.00000 100% - 0s H 0 0 66.0000000 0.00000 100% - 0s 0 0 0.33041 0 201 66.00000 0.33041 99.5% - 0s H 0 0 65.0000000 0.33041 99.5% - 0s H 0 0 54.0000000 0.33041 99.4% - 0s 0 0 0.98432 0 203 54.00000 0.98432 98.2% - 0s H 0 0 44.0000000 0.98432 97.8% - 0s 0 0 0.98440 0 207 44.00000 0.98440 97.8% - 0s 0 0 0.98440 0 207 44.00000 0.98440 97.8% - 0s H 0 0 38.0000000 0.98440 97.4% - 0s 0 2 0.98459 0 204 38.00000 0.98459 97.4% - 0s H 27 27 35.0000000 1.00161 97.1% 49.3 0s H 54 54 25.0000000 1.00161 96.0% 33.5 0s * 71 54 44 24.0000000 1.00161 95.8% 27.6 0s H 209 139 23.0000000 1.08769 95.3% 29.4 0s H 338 157 21.0000000 1.39890 93.3% 30.3 0s * 500 185 18 20.0000000 5.54377 72.3% 31.3 0s 3360 228 cutoff 19 20.00000 15.75862 21.2% 26.2 5s Explored 3916 nodes (102303 simplex iterations) in 5.70 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%