Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:29:13 2012 Optimize a model with 974 rows, 140 columns and 1948 nonzeros Presolve removed 375 rows and 0 columns Presolve time: 0.01s Presolved: 599 rows, 140 columns, 1553 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 4.637059e+01, 410 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.37059 0 139 31.00000 46.37059 49.6% - 0s H 0 0 32.0000000 46.37059 44.9% - 0s 0 0 45.81383 0 138 32.00000 45.81383 43.2% - 0s H 0 0 33.0000000 45.81383 38.8% - 0s 0 0 45.52095 0 139 33.00000 45.52095 37.9% - 0s 0 0 45.05556 0 139 33.00000 45.05556 36.5% - 0s 0 0 44.83070 0 138 33.00000 44.83070 35.9% - 0s 0 0 44.75773 0 137 33.00000 44.75773 35.6% - 0s 0 0 44.69602 0 138 33.00000 44.69602 35.4% - 0s 0 0 44.67111 0 139 33.00000 44.67111 35.4% - 0s 0 0 44.61557 0 139 33.00000 44.61557 35.2% - 0s 0 0 44.58082 0 139 33.00000 44.58082 35.1% - 0s 0 0 44.57393 0 138 33.00000 44.57393 35.1% - 0s 0 0 44.56773 0 139 33.00000 44.56773 35.1% - 0s 0 0 44.56773 0 138 33.00000 44.56773 35.1% - 0s 0 2 44.56726 0 138 33.00000 44.56726 35.1% - 0s * 52 29 16 34.0000000 43.97650 29.3% 37.4 0s * 106 47 11 35.0000000 43.48358 24.2% 42.2 0s 611 219 37.00000 8 139 35.00000 41.40988 18.3% 38.6 5s 620 225 38.23881 6 140 35.00000 41.40988 18.3% 38.0 10s 1884 626 38.50000 20 87 35.00000 40.22078 14.9% 43.1 15s 5063 965 36.16667 34 81 35.00000 38.00000 8.57% 33.9 20s Cutting planes: Clique: 7 Zero half: 85 Explored 8021 nodes (239662 simplex iterations) in 23.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%