Build (method = -2) #dp: 4360 Step-3' Graph: 755 vertices and 2258 arcs (0.05s) Step-4' Graph: 126 vertices and 1000 arcs (0.05s) #V4/#V3 = 0.17 #A4/#A3 = 0.44 Ready! (0.05s) Optimize a model with 186 rows, 1001 columns and 2755 nonzeros Presolve removed 13 rows and 38 columns Presolve time: 0.01s Presolved: 173 rows, 963 columns, 2680 nonzeros Variable types: 0 continuous, 963 integer (0 binary) Found heuristic solution: objective 2525.0000000 Found heuristic solution: objective 2270.0000000 Optimize a model with 173 rows, 963 columns and 2680 nonzeros Presolved: 173 rows, 963 columns, 2680 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.462e+03 Factor NZ : 4.519e+03 Factor Ops : 1.508e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.36622643e+05 -2.58784109e+05 1.01e+06 2.22e-16 1.60e+03 0s 1 3.33911412e+04 -7.79888122e+04 1.54e+05 1.78e-15 2.53e+02 0s 2 6.07749302e+03 -2.49118353e+04 1.66e+04 8.66e-15 3.47e+01 0s 3 2.45323955e+03 -7.79685162e+03 1.34e+03 1.30e-14 6.28e+00 0s 4 1.60482033e+03 -2.32768511e+03 1.75e+02 2.66e-15 2.08e+00 0s 5 1.31710369e+03 -2.31024689e+02 6.22e+01 1.22e-15 8.00e-01 0s 6 1.18622023e+03 5.61552228e+02 2.60e+01 1.24e-15 3.20e-01 0s 7 1.11489837e+03 8.33734595e+02 9.11e+00 1.33e-15 1.43e-01 0s 8 1.08055703e+03 9.34418706e+02 2.19e+00 1.14e-15 7.41e-02 0s 9 1.06792286e+03 1.02156211e+03 7.74e-01 1.28e-15 2.35e-02 0s 10 1.06211868e+03 1.04855623e+03 2.37e-01 1.37e-15 6.88e-03 0s 11 1.05973918e+03 1.05883360e+03 1.01e-03 1.31e-15 4.58e-04 0s 12 1.05966819e+03 1.05966580e+03 1.16e-10 1.28e-15 1.21e-06 0s 13 1.05966667e+03 1.05966667e+03 6.60e-11 1.45e-15 1.87e-12 0s Barrier solved model in 13 iterations and 0.01 seconds Optimal objective 1.05966667e+03 Root relaxation: objective 1.059667e+03, 382 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1059.66667 0 25 2270.00000 1059.66667 53.3% - 0s H 0 0 1061.0000000 1059.66667 0.13% - 0s * 0 0 0 1060.0000000 1060.00000 0.0% - 0s Cutting planes: Gomory: 1 Zero half: 1 Explored 0 nodes (666 simplex iterations) in 0.08 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.060000000000e+03, best bound 1.060000000000e+03, gap 0.0% Preprocessing time: 0.06 seconds Gurobi run time: 0.08 seconds Total run time: 0.14 seconds Objective: 1060 Solution: 28 x [14, 21, 22] 12 x [20, 21, 22] 5 x [11, 21, 22] 9 x [22, 29, 50] 21 x [22, 23, 26] 4 x [22, 26, 50] 20 x [5, 25, 30] 32 x [7, 30, 57] 18 x [7, 8, 30] 12 x [30, 40, 46] 23 x [6, 32, 34] 30 x [25, 32, 45] 4 x [5, 13, 44] 35 x [1, 3, 44] 1 x [8, 44] 15 x [9, 28, 35] 24 x [34, 35, 36] 22 x [17, 36, 58] 7 x [8, 34, 47] 10 x [27, 47, 58] 17 x [5, 25, 47] 38 x [4, 15, 47] 28 x [6, 34, 38] 7 x [9, 15, 34] 2 x [9, 34, 45] 16 x [2, 16, 18] 27 x [17, 18, 37] 67 x [10, 20, 56] 1 x [10, 11, 20] 9 x [2, 13, 26] 3 x [2, 13, 50] 22 x [11, 13, 29] 9 x [12, 13, 45] 49 x [14, 19, 59] 25 x [29, 35, 43] 12 x [5, 24, 43] 34 x [26, 43, 50] 34 x [21, 41, 55] 38 x [31, 33, 45] 2 x [8, 17, 25] 11 x [25, 29, 33] 2 x [25, 33, 41] 6 x [21, 25, 59] 2 x [21, 25, 45] 45 x [15, 58, 60] 20 x [8, 53, 58] 22 x [12, 48, 49] 9 x [49, 50, 52] 36 x [49, 50, 54] 2 x [6, 8, 49] 21 x [3, 35, 42] 9 x [5, 37, 42] 28 x [38, 42, 54] 21 x [16, 17, 40] 4 x [3, 37, 38] 2 x [3, 17, 37] 22 x [3, 40, 41] 6 x [17, 37, 39] 20 x [51, 53, 54]