Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:59:28 2013 Optimize a model with 2000 rows, 102100 columns and 206700 nonzeros Presolve removed 100 rows and 700 columns Presolve time: 0.56s Presolved: 1900 rows, 101400 columns, 205700 nonzeros Variable types: 101100 continuous, 300 integer (300 binary) Root relaxation: objective 7.918217e+05, 5296 iterations, 1.24 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 791821.709 0 2 - 791821.709 - - 2s H 0 0 856648.37185 791821.709 7.57% - 2s 0 0 791888.424 0 2 856648.372 791888.424 7.56% - 3s 0 0 791945.556 0 2 856648.372 791945.556 7.55% - 3s 0 0 791945.990 0 2 856648.372 791945.990 7.55% - 4s 0 0 791951.200 0 2 856648.372 791951.200 7.55% - 4s 0 0 791960.174 0 2 856648.372 791960.174 7.55% - 4s 0 0 791962.067 0 2 856648.372 791962.067 7.55% - 5s 0 0 791964.897 0 2 856648.372 791964.897 7.55% - 5s 0 0 791966.558 0 2 856648.372 791966.558 7.55% - 6s 0 0 791967.560 0 2 856648.372 791967.560 7.55% - 6s 0 0 791967.851 0 2 856648.372 791967.851 7.55% - 6s 0 0 791968.477 0 2 856648.372 791968.477 7.55% - 7s 0 0 791968.856 0 2 856648.372 791968.856 7.55% - 8s 0 0 791968.856 0 2 856648.372 791968.856 7.55% - 8s 0 2 792023.446 0 2 856648.372 792023.446 7.54% - 10s * 17 8 16 793357.35859 792676.590 0.09% 61.1 14s 21 5 792787.012 5 1 793357.359 792787.012 0.07% 55.8 15s * 34 3 4 793200.24980 792833.906 0.05% 58.7 17s Cutting planes: Flow cover: 20 Explored 48 nodes (9342 simplex iterations) in 18.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.932002498024e+05, best bound 7.931571161541e+05, gap 0.0054%