Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:23:19 2013 Optimize a model with 32032 rows, 31472 columns and 125552 nonzeros Presolve removed 56 rows and 0 columns Presolve time: 0.14s Presolved: 31976 rows, 31472 columns, 125496 nonzeros Variable types: 31416 continuous, 56 integer (56 binary) Root relaxation: objective 4.607054e+04, 3953 iterations, 1.43 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46070.5358 0 46 - 46070.5358 - - 1s H 0 0 60318.000000 46070.5358 23.6% - 2s 0 0 53502.3776 0 8 60318.0000 53502.3776 11.3% - 4s H 0 0 57941.766715 53502.3776 7.66% - 4s H 0 0 56931.000000 53502.3776 6.02% - 4s H 0 0 56699.000000 53502.3776 5.64% - 4s 0 0 53950.3578 0 6 56699.0000 53950.3578 4.85% - 5s H 0 0 55853.000000 53950.3578 3.41% - 5s 0 0 53981.2543 0 3 55853.0000 53981.2543 3.35% - 5s H 0 0 54479.000000 53981.2543 0.91% - 5s H 0 0 54280.000000 53981.2543 0.55% - 5s H 0 0 54155.000000 53981.2543 0.32% - 5s H 0 0 54082.000000 53981.2543 0.19% - 6s 0 2 53981.4459 0 3 54082.0000 53981.4459 0.19% - 6s * 7 3 6 54071.000000 54025.2738 0.08% 110 6s * 14 3 8 54059.000000 54051.0000 0.01% 75.4 6s Cutting planes: Implied bound: 50 Explored 17 nodes (8053 simplex iterations) in 6.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.405900000000e+04, best bound 5.405514388161e+04, gap 0.0071%