Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:37:33 2012 Optimize a model with 603 rows, 539 columns and 2044 nonzeros Presolve removed 0 rows and 11 columns Presolve time: 0.00s Presolved: 603 rows, 528 columns, 2033 nonzeros Variable types: 0 continuous, 528 integer (527 binary) Found heuristic solution: objective 119.0000000 Root relaxation: objective 0.000000e+00, 298 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 0 219 119.00000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s 0 0 0.31053 0 221 84.00000 0.31053 100% - 0s H 0 0 69.0000000 0.31053 100% - 0s 0 0 0.81171 0 226 69.00000 0.81171 98.8% - 0s 0 0 0.81246 0 226 69.00000 0.81246 98.8% - 0s 0 0 0.81246 0 225 69.00000 0.81246 98.8% - 0s H 0 0 61.0000000 0.81246 98.7% - 0s 0 2 0.81387 0 225 61.00000 0.81387 98.7% - 0s H 27 27 49.0000000 1.00000 98.0% 41.5 0s H 32 32 45.0000000 1.00000 97.8% 40.5 0s H 54 44 25.0000000 1.00000 96.0% 33.5 0s * 240 167 28 24.0000000 1.00000 95.8% 39.0 0s * 539 308 29 23.0000000 1.21991 94.7% 40.5 1s 2479 629 19.34010 22 230 23.00000 12.10345 47.4% 31.6 5s 5321 1074 cutoff 28 23.00000 15.00000 34.8% 28.0 10s 8220 1287 17.26601 21 234 23.00000 16.49315 28.3% 27.1 15s 11430 1317 cutoff 27 23.00000 17.56250 23.6% 26.2 20s 14647 1134 cutoff 24 23.00000 18.31818 20.4% 25.6 25s 18046 683 22.00000 25 206 23.00000 19.33333 15.9% 25.8 30s Explored 20076 nodes (518168 simplex iterations) in 32.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%