Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:38:18 2013 Optimize a model with 2750 rows, 625250 columns and 1250250 nonzeros Presolve time: 2.31s Presolved: 2750 rows, 625250 columns, 1250250 nonzeros Variable types: 625000 continuous, 250 integer (250 binary) Root relaxation: objective 6.151866e+05, 17505 iterations, 3.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 615186.624 0 5 - 615186.624 - - 6s H 0 0 675220.00000 615186.624 8.89% - 8s H 0 0 615961.00000 615186.624 0.13% - 10s 0 0 615464.033 0 5 615961.000 615464.033 0.08% - 11s 0 0 615464.033 0 5 615961.000 615464.033 0.08% - 15s 0 0 615464.727 0 5 615961.000 615464.727 0.08% - 16s 0 0 615525.142 0 4 615961.000 615525.142 0.07% - 16s 0 0 615537.381 0 4 615961.000 615537.381 0.07% - 17s 0 0 615541.838 0 5 615961.000 615541.838 0.07% - 17s 0 0 615551.621 0 4 615961.000 615551.621 0.07% - 18s 0 0 615560.177 0 4 615961.000 615560.177 0.07% - 18s 0 0 615560.226 0 4 615961.000 615560.226 0.07% - 19s 0 0 615565.575 0 3 615961.000 615565.575 0.06% - 19s 0 0 615565.575 0 3 615961.000 615565.575 0.06% - 20s 0 0 615566.890 0 2 615961.000 615566.890 0.06% - 20s 0 0 615566.890 0 2 615961.000 615566.890 0.06% - 21s 0 0 615566.890 0 2 615961.000 615566.890 0.06% - 21s 0 0 615568.511 0 3 615961.000 615568.511 0.06% - 22s 0 0 615568.511 0 3 615961.000 615568.511 0.06% - 22s 0 0 615568.511 0 3 615961.000 615568.511 0.06% - 22s 0 0 615568.511 0 3 615961.000 615568.511 0.06% - 23s 0 0 615568.512 0 2 615961.000 615568.512 0.06% - 23s 0 2 615572.372 0 2 615961.000 615572.372 0.06% - 25s * 10 4 9 615899.00000 615708.662 0.03% 105 27s Cutting planes: Implied bound: 125 Flow cover: 1 Explored 15 nodes (27849 simplex iterations) in 28.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.158990000000e+05, best bound 6.158990000000e+05, gap 0.0%