Build (method = -2) #dp: 11960 Step-3' Graph: 177 vertices and 588 arcs (0.06s) Step-4' Graph: 6 vertices and 246 arcs (0.06s) #V4/#V3 = 0.03 #A4/#A3 = 0.42 Ready! (0.06s) Optimize a model with 86 rows, 247 columns and 735 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 84 rows, 245 columns, 731 nonzeros Variable types: 0 continuous, 245 integer (0 binary) Found heuristic solution: objective 4041.0000000 Found heuristic solution: objective 3997.0000000 Optimize a model with 84 rows, 245 columns and 731 nonzeros Presolved: 84 rows, 245 columns, 731 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.470e+02 Factor NZ : 7.370e+02 Factor Ops : 1.228e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.35933448e+03 -1.14841078e+04 2.16e+02 0.00e+00 8.32e+01 0s 1 2.96225351e+03 -4.12501110e+03 1.23e+01 5.55e-16 1.43e+01 0s 2 1.63664559e+03 7.40646766e+02 1.50e-02 3.05e-15 1.58e+00 0s 3 1.35933856e+03 1.23848078e+03 2.71e-04 4.16e-16 2.12e-01 0s 4 1.34806075e+03 1.34250050e+03 9.59e-06 3.33e-16 9.75e-03 0s 5 1.34733451e+03 1.34732853e+03 1.41e-08 2.22e-16 1.05e-05 0s 6 1.34733333e+03 1.34733333e+03 7.13e-12 2.22e-16 1.05e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 1.34733333e+03 Root relaxation: objective 1.347333e+03, 209 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1347.33333 0 4 3997.00000 1347.33333 66.3% - 0s H 0 0 1348.0000000 1347.33333 0.05% - 0s Explored 0 nodes (294 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.348000000000e+03, best bound 1.348000000000e+03, gap 0.0% Preprocessing time: 0.07 seconds Gurobi run time: 0.01 seconds Total run time: 0.08 seconds Objective: 1348 Solution: 3 x [10, 13, 56] 2 x [10, 26, 64] 38 x [10, 33, 61] 1 x [10, 10, 23] 79 x [41, 62, 80] 11 x [42, 63, 65] 2 x [1, 18, 52] 61 x [54, 68, 72] 1 x [2, 19, 68] 4 x [2, 3, 42] 29 x [2, 6, 28] 81 x [15, 47, 57] 35 x [19, 56, 59] 52 x [12, 17, 23] 3 x [25, 49, 60] 70 x [32, 60, 67] 39 x [14, 22, 78] 1 x [8, 78] 9 x [41, 62, 79] 1 x [44, 58, 64] 26 x [4, 38, 64] 2 x [5, 17, 33] 2 x [37, 43, 45] 16 x [15, 20, 45] 3 x [58, 65, 75] 34 x [26, 34, 73] 1 x [27, 71, 73] 6 x [8, 21, 44] 1 x [8, 27, 41] 67 x [8, 39, 43] 55 x [1, 7, 69] 48 x [3, 21, 76] 9 x [50, 57, 79] 31 x [27, 49, 53] 1 x [27, 38, 49] 77 x [48, 70, 71] 5 x [7, 20, 71] 1 x [27, 54, 55] 1 x [54, 74] 1 x [5, 22, 51] 91 x [18, 51, 77] 58 x [9, 30, 74] 5 x [9, 18, 25] 83 x [13, 16, 65] 5 x [20, 22, 66] 74 x [11, 29, 36] 1 x [29, 30, 36] 65 x [24, 40, 53] 24 x [5, 46, 55] 20 x [35, 37, 75] 1 x [25, 30, 67] 4 x [37, 40, 67] 1 x [4, 11, 28] 4 x [11, 31, 34] 1 x [4, 24, 50] 1 x [4, 4, 50] 1 x [24, 31, 31]