Build (method = -2) #dp: 764 Step-3' Graph: 59 vertices and 168 arcs (0.00s) Step-4' Graph: 5 vertices and 60 arcs (0.00s) #V4/#V3 = 0.08 #A4/#A3 = 0.36 Ready! (0.00s) Optimize a model with 24 rows, 61 columns and 179 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 22 rows, 59 columns, 175 nonzeros Variable types: 0 continuous, 59 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1829.0000000 Optimize a model with 22 rows, 59 columns and 175 nonzeros Presolved: 22 rows, 59 columns, 175 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.000e+01 Factor NZ : 2.530e+02 Factor Ops : 3.795e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.50080077e+03 -5.50421886e+03 2.90e+02 0.00e+00 1.64e+02 0s 1 1.47071947e+03 -1.74205335e+03 1.87e+01 4.44e-16 2.74e+01 0s 2 8.03099604e+02 3.80258054e+02 1.15e-02 9.99e-16 3.10e+00 0s 3 6.73641196e+02 6.13522072e+02 2.68e-04 3.33e-16 4.39e-01 0s 4 6.66870316e+02 6.64186331e+02 7.84e-14 2.22e-16 1.96e-02 0s 5 6.66666874e+02 6.66666347e+02 2.18e-13 2.22e-16 3.85e-06 0s 6 6.66666667e+02 6.66666667e+02 2.87e-13 3.33e-16 3.88e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 6.66666667e+02 Root relaxation: objective 6.666667e+02, 50 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 666.66667 0 4 1829.00000 666.66667 63.6% - 0s H 0 0 667.0000000 666.66667 0.05% - 0s Explored 0 nodes (64 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.670000000000e+02, best bound 6.670000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 667 Solution: 171 x [5, 11, 12] 2 x [8, 11, 13] 2 x [2, 8, 9] 71 x [11, 13, 19] 21 x [12, 13, 18] 29 x [1, 11, 15] 14 x [4, 11, 17] 4 x [6, 14, 17] 55 x [1, 6, 17] 61 x [7, 17, 18] 150 x [4, 9, 16] 29 x [1, 2, 16] 1 x [6, 9, 14] 6 x [1, 14, 18] 20 x [1, 3, 6] 30 x [1, 2, 10] 1 x [9, 18]