Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:17:25 2012 Optimize a model with 511 rows, 467 columns and 1742 nonzeros Presolve removed 0 rows and 21 columns Presolve time: 0.00s Presolved: 511 rows, 446 columns, 1721 nonzeros Variable types: 0 continuous, 446 integer (445 binary) Found heuristic solution: objective 99.0000000 Root relaxation: objective 0.000000e+00, 268 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 0 188 99.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.29181 0 190 72.00000 0.29181 100% - 0s H 0 0 64.0000000 0.29181 100% - 0s 0 0 0.75598 0 193 64.00000 0.75598 98.8% - 0s H 0 0 52.0000000 0.75598 98.5% - 0s 0 0 0.75598 0 193 52.00000 0.75598 98.5% - 0s 0 2 0.75810 0 193 52.00000 0.75810 98.5% - 0s H 27 27 51.0000000 1.00000 98.0% 36.7 0s H 54 47 24.0000000 1.00000 95.8% 28.0 0s * 111 55 39 20.0000000 2.63462 86.8% 27.5 0s 3893 1076 18.33588 21 160 20.00000 13.59783 32.0% 22.7 5s 8259 1093 cutoff 20 20.00000 15.64901 21.8% 22.2 10s Explored 12055 nodes (270075 simplex iterations) in 13.95 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%