Gurobi 5.0.1 (linux64) logging started Wed Nov 28 03:52:10 2012 Optimize a model with 1367 rows, 1296 columns and 7630 nonzeros Presolve removed 35 rows and 1 columns Presolve time: 0.05s Presolved: 1332 rows, 1295 columns, 7490 nonzeros Variable types: 35 continuous, 1260 integer (1260 binary) Found heuristic solution: objective 5365.0000000 Root relaxation: objective 1.413500e+03, 168 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1413.50000 0 41 5365.00000 1413.50000 73.7% - 0s H 0 0 4092.0000000 1413.50000 65.5% - 0s 0 0 1420.41338 0 44 4092.00000 1420.41338 65.3% - 0s 0 0 1420.41963 0 44 4092.00000 1420.41963 65.3% - 0s H 0 0 3882.0000000 1420.41963 63.4% - 0s 0 0 1420.41963 0 44 3882.00000 1420.41963 63.4% - 0s H 0 0 1539.0000000 1420.41963 7.71% - 0s 0 0 1420.41963 0 41 1539.00000 1420.41963 7.71% - 0s 0 0 1420.73944 0 48 1539.00000 1420.73944 7.68% - 0s 0 0 1420.75537 0 48 1539.00000 1420.75537 7.68% - 0s 0 0 1420.75537 0 43 1539.00000 1420.75537 7.68% - 0s H 0 0 1524.0000000 1420.75537 6.77% - 0s 0 2 1420.85531 0 43 1524.00000 1420.85531 6.77% - 0s H 81 16 1484.0000000 1432.61630 3.46% 8.8 0s H 108 30 1475.0000000 1434.00533 2.78% 11.1 0s * 607 37 7 1473.0000000 1464.00000 0.61% 12.1 1s Cutting planes: Gomory: 5 Cover: 1 Implied bound: 20 MIR: 27 Mod-K: 2 Explored 684 nodes (8580 simplex iterations) in 1.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.473000000000e+03, best bound 1.473000000000e+03, gap 0.0%