Build (method = -2) #dp: 2426 Step-3' Graph: 68 vertices and 261 arcs (0.01s) Step-4' Graph: 31 vertices and 187 arcs (0.01s) #V4/#V3 = 0.46 #A4/#A3 = 0.72 Ready! (0.01s) Optimize a model with 51 rows, 188 columns and 509 nonzeros Presolve removed 3 rows and 5 columns Presolve time: 0.00s Presolved: 48 rows, 183 columns, 502 nonzeros Variable types: 0 continuous, 183 integer (0 binary) Found heuristic solution: objective 883.0000000 Found heuristic solution: objective 658.0000000 Optimize a model with 48 rows, 183 columns and 502 nonzeros Presolved: 48 rows, 183 columns, 502 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.610e+02 Factor NZ : 7.010e+02 Factor Ops : 1.178e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.80457997e+03 -1.90017399e+04 8.73e+03 2.22e-16 3.36e+02 0s 1 2.16610137e+03 -7.15731257e+03 8.36e+02 4.44e-16 4.47e+01 0s 2 7.94347671e+02 -1.53027067e+03 3.36e+01 2.33e-15 6.46e+00 0s 3 4.22197539e+02 -2.63214525e+02 3.31e+00 3.33e-16 1.79e+00 0s 4 2.71841712e+02 9.09663934e+01 7.46e-01 4.16e-16 4.70e-01 0s 5 2.49547236e+02 2.31339464e+02 6.69e-02 2.72e-16 4.72e-02 0s 6 2.44015534e+02 2.43959161e+02 2.36e-04 2.22e-16 1.46e-04 0s 7 2.44000000e+02 2.44000000e+02 2.40e-10 3.33e-16 1.52e-10 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 2.44000000e+02 Root relaxation: objective 2.440000e+02, 123 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 244.0000000 244.00000 0.0% - 0s Explored 0 nodes (123 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.440000000000e+02, best bound 2.440000000000e+02, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 244 Solution: 24 x [5, 14, 16, 18] 1 x [3, 6, 14, 18] 43 x [6, 7, 14, 18] 3 x [6, 14, 14, 18] 20 x [4, 6, 8, 14] 10 x [3, 11, 12, 19] 42 x [3, 4, 9, 15] 1 x [1, 1, 3, 5] 25 x [11, 13, 17, 20] 4 x [1, 17, 20, 20] 18 x [1, 19, 20, 20] 1 x [1, 10, 12, 19] 8 x [8, 9, 9, 18] 14 x [2, 8, 9, 9] 30 x [1, 1, 10, 11]