Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:25:22 2013 Optimize a model with 627 rows, 32547 columns and 65037 nonzeros Presolve time: 0.04s Presolved: 627 rows, 32547 columns, 65037 nonzeros Variable types: 32490 continuous, 57 integer (57 binary) Root relaxation: objective 6.418265e+04, 1356 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64182.6489 0 5 - 64182.6489 - - 0s H 0 0 65004.000000 64182.6489 1.26% - 0s 0 0 64518.1291 0 6 65004.0000 64518.1291 0.75% - 0s H 0 0 64634.000000 64518.1291 0.18% - 0s 0 0 64536.2794 0 2 64634.0000 64536.2794 0.15% - 0s 0 0 64536.2794 0 5 64634.0000 64536.2794 0.15% - 0s 0 0 64536.2794 0 7 64634.0000 64536.2794 0.15% - 0s 0 0 64536.2794 0 2 64634.0000 64536.2794 0.15% - 0s 0 0 64536.2794 0 2 64634.0000 64536.2794 0.15% - 0s 0 2 64541.4375 0 2 64634.0000 64541.4375 0.14% - 0s * 4 3 3 64585.000000 64585.0000 0.0% 34.8 0s Cutting planes: Implied bound: 53 Flow cover: 3 Explored 5 nodes (2830 simplex iterations) in 0.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.458500000000e+04, best bound 6.458500000000e+04, gap 0.0%