Gurobi 5.0.1 (linux64) logging started Wed Apr 24 09:25:21 2013 Optimize a model with 99099 rows, 98109 columns and 392139 nonzeros Presolve removed 3182 rows and 0 columns Presolve time: 0.72s Presolved: 95917 rows, 98109 columns, 385775 nonzeros Variable types: 98010 continuous, 99 integer (99 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 18457 1.3600159e+05 6.279222e+03 0.000000e+00 5s 23225 1.3951153e+05 0.000000e+00 0.000000e+00 8s Root relaxation: objective 1.395115e+05, 23225 iterations, 8.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 139511.528 0 3 - 139511.528 - - 9s H 0 0 144766.00000 139511.528 3.63% - 9s 0 0 139513.528 0 5 144766.000 139513.528 3.63% - 10s 0 0 139513.596 0 5 144766.000 139513.596 3.63% - 11s H 0 0 141709.00000 139513.596 1.55% - 14s 0 2 139514.377 0 5 141709.000 139514.377 1.55% - 18s * 4 3 4 139633.00000 139599.910 0.02% 192 19s Cutting planes: Gomory: 2 Flow cover: 2 Explored 6 nodes (24111 simplex iterations) in 19.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.396330000000e+05, best bound 1.396194582461e+05, gap 0.0097%