Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:38:42 2012 Optimize a model with 539 rows, 500 columns and 1845 nonzeros Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 539 rows, 476 columns, 1821 nonzeros Variable types: 0 continuous, 476 integer (475 binary) Found heuristic solution: objective 92.0000000 Root relaxation: objective 0.000000e+00, 266 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 0 193 92.00000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s 0 0 0.29933 0 195 77.00000 0.29933 100% - 0s H 0 0 60.0000000 0.29933 100% - 0s 0 0 0.82702 0 203 60.00000 0.82702 98.6% - 0s H 0 0 56.0000000 0.82702 98.5% - 0s 0 0 0.82702 0 203 56.00000 0.82702 98.5% - 0s H 0 0 54.0000000 0.82702 98.5% - 0s H 0 0 50.0000000 0.82702 98.3% - 0s H 0 0 48.0000000 0.82702 98.3% - 0s 0 2 0.83008 0 202 48.00000 0.83008 98.3% - 0s H 27 27 43.0000000 1.00000 97.7% 47.4 0s H 54 54 39.0000000 1.00000 97.4% 35.9 0s H 81 57 21.0000000 1.00000 95.2% 31.2 0s * 206 142 22 20.0000000 1.00000 95.0% 35.2 0s * 339 232 23 19.0000000 1.05337 94.5% 36.7 0s 2826 832 17.31757 22 177 19.00000 11.33333 40.4% 27.2 5s 6299 1299 18.00000 24 170 19.00000 13.39535 29.5% 24.5 10s 9981 1168 17.00000 20 202 19.00000 14.62791 23.0% 24.0 15s 13795 171 infeasible 23 19.00000 17.40000 8.42% 24.5 20s Explored 13980 nodes (341598 simplex iterations) in 20.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%