Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:24:34 2012 Optimize a model with 902 rows, 840 columns and 3620 nonzeros Presolve removed 156 rows and 40 columns Presolve time: 0.02s Presolved: 746 rows, 800 columns, 3361 nonzeros Variable types: 380 continuous, 420 integer (420 binary) Root relaxation: objective 1.730321e+02, 694 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 173.03209 0 44 - 173.03209 - - 0s 0 0 188.39212 0 46 - 188.39212 - - 0s 0 0 189.16701 0 46 - 189.16701 - - 0s 0 0 197.43677 0 42 - 197.43677 - - 0s 0 0 199.38623 0 36 - 199.38623 - - 0s 0 0 204.00111 0 36 - 204.00111 - - 0s 0 0 204.34262 0 41 - 204.34262 - - 0s 0 0 204.66015 0 38 - 204.66015 - - 0s 0 0 204.67511 0 38 - 204.67511 - - 0s 0 0 204.67511 0 36 - 204.67511 - - 0s 0 0 204.67623 0 37 - 204.67623 - - 0s 0 0 204.67623 0 37 - 204.67623 - - 0s 0 2 204.83119 0 37 - 204.83119 - - 0s * 582 381 29 280.0000000 220.81150 21.1% 32.8 1s H 666 339 260.0000000 221.23826 14.9% 33.7 1s * 685 331 16 258.0000000 221.24580 14.2% 33.9 1s H 695 217 243.0000000 221.24967 8.95% 33.8 1s H 1080 172 240.0000000 224.05631 6.64% 37.1 2s Cutting planes: Gomory: 7 Cover: 55 Implied bound: 37 Flow cover: 38 GUB cover: 1 Explored 1709 nodes (63573 simplex iterations) in 3.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+02, best bound 2.400000000000e+02, gap 0.0%