Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:29:30 2013 Optimize a model with 2750 rows, 625250 columns and 1250250 nonzeros Presolve time: 2.29s Presolved: 2750 rows, 625250 columns, 1250250 nonzeros Variable types: 625000 continuous, 250 integer (250 binary) Root relaxation: objective 5.035445e+05, 18842 iterations, 4.78 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 503544.516 0 3 - 503544.516 - - 7s H 0 0 510795.00000 503544.516 1.42% - 8s 0 0 503634.405 0 3 510795.000 503634.405 1.40% - 10s 0 0 503634.405 0 3 510795.000 503634.405 1.40% - 15s H 0 0 506941.00000 503634.405 0.65% - 16s 0 0 503634.405 0 3 506941.000 503634.405 0.65% - 17s 0 0 503635.705 0 3 506941.000 503635.705 0.65% - 17s 0 2 503690.153 0 3 506941.000 503690.153 0.64% - 20s 4 4 503690.153 0 3 506941.000 503690.153 0.64% 0.0 26s 8 7 503690.153 0 4 506941.000 503690.153 0.64% 0.0 30s H 12 9 506812.21019 503690.153 0.62% 898 35s H 14 9 506230.00000 503756.221 0.49% 821 38s 16 12 503862.539 13 2 506230.000 503862.539 0.47% 798 40s H 22 12 505643.00000 503888.739 0.35% 669 44s 22 14 503890.132 16 1 505643.000 503890.132 0.35% 671 45s H 25 11 505141.00000 503891.726 0.25% 594 46s * 37 1 27 503903.00000 503903.000 0.0% 429 48s Cutting planes: Gomory: 1 Implied bound: 62 Flow cover: 3 Explored 38 nodes (46331 simplex iterations) in 48.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.039030000000e+05, best bound 5.039030000000e+05, gap 0.0%