Build (method = -2) #dp: 1531 Step-3' Graph: 65 vertices and 231 arcs (0.01s) Step-4' Graph: 10 vertices and 121 arcs (0.01s) #V4/#V3 = 0.15 #A4/#A3 = 0.52 Ready! (0.01s) Optimize a model with 70 rows, 122 columns and 351 nonzeros Presolve removed 15 rows and 15 columns Presolve time: 0.00s Presolved: 55 rows, 107 columns, 308 nonzeros Variable types: 0 continuous, 107 integer (0 binary) Found heuristic solution: objective 3900.0000000 Found heuristic solution: objective 3377.0000000 Found heuristic solution: objective 3270.0000000 Optimize a model with 55 rows, 107 columns and 308 nonzeros Presolved: 55 rows, 107 columns, 308 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.070e+02 Factor NZ : 8.440e+02 Factor Ops : 1.661e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.30410252e+04 -1.61711567e+04 4.01e+03 1.11e-16 4.27e+02 0s 1 6.60881183e+03 -4.08472454e+03 3.15e+02 4.44e-16 5.56e+01 0s 2 2.53841980e+03 4.17130501e+02 1.18e+00 3.77e-15 8.15e+00 0s 3 1.97471549e+03 1.70393054e+03 3.31e-02 4.44e-16 1.04e+00 0s 4 1.95246495e+03 1.94387500e+03 5.12e-13 4.44e-16 3.29e-02 0s 5 1.95150007e+03 1.95149961e+03 1.48e-12 6.66e-16 1.75e-06 0s 6 1.95150000e+03 1.95150000e+03 9.09e-13 4.44e-16 1.76e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 1.95150000e+03 Root relaxation: objective 1.951500e+03, 69 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1951.50000 0 2 3270.00000 1951.50000 40.3% - 0s H 0 0 1952.0000000 1951.50000 0.03% - 0s Explored 0 nodes (69 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.952000000000e+03, best bound 1.952000000000e+03, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 1952 Solution: 21 x [9, 14] 4 x [32, 60] 2 x [12, 32] 41 x [8, 35] 45 x [24, 47] 1 x [15, 33] 9 x [2, 33] 1 x [3, 31] 2 x [18, 31] 5 x [31, 42] 68 x [3, 48] 21 x [4, 8] 79 x [38, 55] 13 x [40, 46] 59 x [44, 51] 22 x [1, 47] 91 x [27, 43] 3 x [34, 45] 1 x [34, 56] 33 x [34, 51] 4 x [34, 47] 85 x [36, 59] 3 x [22, 59] 85 x [19, 23] 81 x [17, 30] 95 x [13, 15] 76 x [5, 6] 67 x [42, 54] 92 x [18, 52] 90 x [39, 58] 12 x [10, 22] 1 x [22, 30] 1 x [19, 22] 6 x [22, 50] 1 x [22, 41] 79 x [11, 53] 70 x [7, 45] 70 x [20, 60] 78 x [25, 50] 89 x [29, 49] 99 x [37, 41] 78 x [26, 56] 1 x [40, 58] 1 x [58, 58] 1 x [5] 44 x [12, 28] 30 x [12, 16] 77 x [2, 57] 3 x [9, 21] 12 x [8, 21]