Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:22:53 2013 Optimize a model with 616 rows, 31416 columns and 62776 nonzeros Presolve time: 0.04s Presolved: 616 rows, 31416 columns, 62776 nonzeros Variable types: 31360 continuous, 56 integer (56 binary) Root relaxation: objective 5.242083e+04, 999 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52420.8266 0 8 - 52420.8266 - - 0s H 0 0 54451.000000 52420.8266 3.73% - 0s H 0 0 52808.000000 52420.8266 0.73% - 0s 0 0 52541.3649 0 7 52808.0000 52541.3649 0.50% - 0s 0 0 52559.5599 0 4 52808.0000 52559.5599 0.47% - 0s 0 0 52559.9494 0 5 52808.0000 52559.9494 0.47% - 0s H 0 0 52781.000000 52559.9494 0.42% - 0s 0 0 52563.7188 0 5 52781.0000 52563.7188 0.41% - 0s 0 0 52564.2410 0 5 52781.0000 52564.2410 0.41% - 0s 0 0 52566.9661 0 5 52781.0000 52566.9661 0.41% - 0s 0 0 52567.1308 0 5 52781.0000 52567.1308 0.41% - 0s 0 0 52567.1533 0 4 52781.0000 52567.1533 0.41% - 0s 0 0 52567.1533 0 4 52781.0000 52567.1533 0.41% - 0s 0 0 52567.1533 0 4 52781.0000 52567.1533 0.41% - 0s 0 0 52567.3936 0 4 52781.0000 52567.3936 0.40% - 0s H 0 0 52670.000000 52567.3936 0.19% - 0s 0 0 52567.3936 0 5 52670.0000 52567.3936 0.19% - 0s 0 0 52567.3936 0 5 52670.0000 52567.3936 0.19% - 0s 0 0 52567.4834 0 4 52670.0000 52567.4834 0.19% - 0s 0 0 52569.2922 0 2 52670.0000 52569.2922 0.19% - 0s 0 0 52569.2922 0 2 52670.0000 52569.2922 0.19% - 0s 0 2 52569.4168 0 2 52670.0000 52569.4168 0.19% - 1s Cutting planes: Implied bound: 61 Flow cover: 4 Explored 12 nodes (2492 simplex iterations) in 1.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.267000000000e+04, best bound 5.267000000000e+04, gap 0.0%