Build (method = -2) #dp: 5465 Step-3' Graph: 42 vertices and 1121 arcs (0.02s) Step-4' Graph: 42 vertices and 1121 arcs (0.02s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.02s) Optimize a model with 122 rows, 1122 columns and 3305 nonzeros Presolve removed 32 rows and 32 columns Presolve time: 0.01s Presolved: 90 rows, 1090 columns, 3211 nonzeros Variable types: 0 continuous, 1090 integer (27 binary) Found heuristic solution: objective 1480.0000000 Found heuristic solution: objective 1006.0000000 Optimize a model with 90 rows, 1090 columns and 3211 nonzeros Presolved: 90 rows, 1090 columns, 3211 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.729e+03 Factor NZ : 2.822e+03 Factor Ops : 1.102e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.31663936e+04 -3.00372794e+04 1.65e+04 6.03e-02 3.00e+02 0s 1 5.77208558e+03 -1.84505980e+04 2.13e+03 6.66e-16 4.44e+01 0s 2 1.80913704e+03 -7.85348266e+03 1.62e+02 3.77e-15 6.24e+00 0s 3 1.38010958e+03 -1.93036899e+03 2.41e+01 7.11e-15 1.62e+00 0s 4 1.08082931e+03 -1.15702073e+02 1.55e+00 1.78e-15 5.42e-01 0s 5 8.73486672e+02 3.20681265e+02 5.62e-01 5.55e-16 2.49e-01 0s 6 7.43863483e+02 5.05170102e+02 2.06e-01 4.44e-16 1.08e-01 0s 7 7.06028930e+02 5.79679185e+02 1.23e-01 3.60e-16 5.69e-02 0s 8 6.79703660e+02 6.28016095e+02 6.61e-02 3.29e-16 2.33e-02 0s 9 6.65291644e+02 6.32944132e+02 3.46e-02 4.44e-16 1.46e-02 0s 10 6.60411706e+02 6.39887749e+02 2.36e-02 3.51e-16 9.24e-03 0s 11 6.55434330e+02 6.45698995e+02 1.11e-02 2.72e-16 4.38e-03 0s 12 6.52810434e+02 6.49813603e+02 2.91e-03 3.48e-16 1.35e-03 0s 13 6.51486212e+02 6.51045526e+02 4.73e-06 3.33e-16 1.98e-04 0s 14 6.51275016e+02 6.51265093e+02 1.93e-09 4.44e-16 4.45e-06 0s 15 6.51272727e+02 6.51272727e+02 9.17e-13 3.86e-16 8.75e-12 0s Barrier solved model in 15 iterations and 0.01 seconds Optimal objective 6.51272727e+02 Root relaxation: objective 6.512727e+02, 223 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 651.27273 0 19 1006.00000 651.27273 35.3% - 0s H 0 0 655.0000000 651.27273 0.57% - 0s H 0 0 652.0000000 651.27273 0.11% - 0s Explored 0 nodes (308 simplex iterations) in 0.04 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.520000000000e+02, best bound 6.520000000000e+02, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.04 seconds Total run time: 0.08 seconds Objective: 652 Solution: 9 x [27, 76] 23 x [16, 27] 16 x [40, 72, 73] 10 x [17, 63] 22 x [42, 61] 12 x [17, 61] 17 x [10, 36] 1 x [10, 31] 20 x [19, 31] 7 x [17, 31, 51] 26 x [20, 33] 15 x [30, 68] 4 x [30, 46] 17 x [46, 70] 11 x [46, 57, 72] 3 x [67, 69] 1 x [64, 71] 2 x [55, 64] 6 x [12, 39, 64] 14 x [49, 69] 18 x [34, 44] 4 x [11, 39, 44] 6 x [6, 13, 44] 2 x [22, 38] 1 x [20, 38] 5 x [13, 38, 40] 22 x [15, 62] 1 x [15, 20] 12 x [15, 24, 24, 39] 31 x [8, 75] 2 x [62, 75] 12 x [21, 53] 8 x [51, 53, 62] 10 x [14, 53, 76] 1 x [79, 80] 4 x [20, 50, 80] 1 x [29, 79] 9 x [29, 41] 10 x [7, 29] 2 x [1, 23] 14 x [1, 65, 76] 1 x [1, 20, 76] 1 x [48, 74] 23 x [2, 54] 2 x [2, 74] 12 x [47, 78] 2 x [45, 78] 3 x [72, 72, 74, 78] 27 x [35, 37] 1 x [3, 35] 2 x [25, 43] 5 x [32, 43, 60] 27 x [32, 43, 59] 5 x [28, 39, 51, 60] 18 x [23, 28, 50] 1 x [9] 21 x [9, 47] 1 x [9, 25] 8 x [9, 58, 60] 16 x [52, 66] 5 x [26, 66] 14 x [18, 77] 8 x [77, 77] 23 x [26, 56] 7 x [4, 11, 59] 1 x [4, 4] 6 x [4, 4, 24] 1 x [5, 59]