Gurobi 5.0.1 (linux64) logging started Wed Apr 24 14:00:26 2013 Optimize a model with 2970 rows, 729270 columns and 1458270 nonzeros Presolve removed 0 rows and 0 columns (presolve time = 5s) ... Presolve time: 5.27s Presolved: 2970 rows, 729270 columns, 1458270 nonzeros Variable types: 729000 continuous, 270 integer (270 binary) Starting sifting (using dual simplex for sub-problems)... Iter Pivots Primal Obj Dual Obj Time 0 0 infinity 4.8067000e+04 0s 1 11567 1.4735000e+10 8.1283111e+04 0s 2 20231 2.1245051e+07 8.2241761e+04 1s 3 26287 1.1686131e+06 8.6032166e+04 1s 4 35858 8.9329206e+05 1.2990253e+05 1s 5 45796 8.1024384e+05 2.5120534e+05 1s 6 57154 7.8163087e+05 4.7815570e+05 1s 7 67464 7.7727649e+05 6.0351294e+05 2s 8 78851 7.6478935e+05 6.3182868e+05 2s 9 88683 7.6465339e+05 7.0834816e+05 2s 10 97339 7.6446229e+05 7.5974309e+05 2s Sifting complete Root relaxation: objective 7.642973e+05, 101909 iterations, 2.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 764297.329 0 6 - 764297.329 - - 8s H 0 0 855653.00000 764297.329 10.7% - 10s 0 0 764581.575 0 4 855653.000 764581.575 10.6% - 15s H 0 0 851506.75953 764581.575 10.2% - 15s H 0 0 850694.00000 764581.575 10.1% - 16s 0 0 764644.691 0 5 850694.000 764644.691 10.1% - 18s H 0 0 839272.98238 764644.691 8.89% - 18s H 0 0 837699.00000 764644.691 8.72% - 18s 0 0 764666.139 0 5 837699.000 764666.139 8.72% - 20s 0 0 764673.405 0 4 837699.000 764673.405 8.72% - 22s 0 0 764684.391 0 5 837699.000 764684.391 8.72% - 24s 0 0 764691.702 0 4 837699.000 764691.702 8.72% - 26s 0 0 764696.969 0 3 837699.000 764696.969 8.71% - 28s H 0 0 822333.66495 764696.969 7.01% - 29s H 0 0 820886.00000 764696.969 6.84% - 29s 0 0 764696.969 0 3 820886.000 764696.969 6.84% - 30s 0 0 764696.969 0 3 820886.000 764696.969 6.84% - 32s H 0 0 820842.00000 764696.969 6.84% - 33s 0 0 764696.969 0 3 820842.000 764696.969 6.84% - 34s 0 0 764696.969 0 3 820842.000 764696.969 6.84% - 36s 0 2 764699.125 0 3 820842.000 764699.125 6.84% - 42s 1 3 764915.752 1 4 820842.000 764915.752 6.81% 349 45s H 2 2 798584.19609 764915.752 4.22% 174 50s 3 5 764969.192 2 4 798584.196 764969.192 4.21% 981 55s H 4 4 793907.41052 764969.192 3.65% 736 56s H 5 5 792307.71498 765005.168 3.45% 613 58s H 6 4 766157.97872 765054.516 0.14% 602 61s H 7 5 765931.00000 765054.516 0.11% 617 61s H 8 5 765867.00000 765054.516 0.11% 547 62s * 11 4 10 765494.00000 765054.516 0.06% 416 63s 17 0 cutoff 5 765494.000 765494.000 0.0% 334 65s Cutting planes: Implied bound: 196 Flow cover: 3 Explored 18 nodes (108775 simplex iterations) in 65.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.654940000000e+05, best bound 7.654940000000e+05, gap 0.0%