Build (method = -2) #dp: 4921 Step-3' Graph: 47 vertices and 645 arcs (0.03s) Step-4' Graph: 24 vertices and 599 arcs (0.03s) #V4/#V3 = 0.51 #A4/#A3 = 0.93 Ready! (0.03s) Optimize a model with 124 rows, 600 columns and 1759 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 122 rows, 598 columns, 1755 nonzeros Variable types: 0 continuous, 598 integer (52 binary) Found heuristic solution: objective 260.0000000 Optimize a model with 122 rows, 598 columns and 1755 nonzeros Presolved: 122 rows, 598 columns, 1755 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.930e+02 Factor NZ : 1.831e+03 Factor Ops : 4.041e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.01059900e+03 -6.74170070e+03 2.02e+03 6.83e-02 4.67e+01 0s 1 1.44967961e+03 -2.82118289e+03 2.69e+02 5.55e-16 7.68e+00 0s 2 4.03164303e+02 -9.92374279e+02 8.37e+00 5.55e-16 1.17e+00 0s 3 2.07271718e+02 1.24418572e+00 1.34e-13 3.33e-16 1.60e-01 0s 4 1.54354982e+02 1.03933788e+02 7.20e-13 3.33e-16 3.92e-02 0s 5 1.37592132e+02 1.35394038e+02 4.13e-13 4.44e-16 1.71e-03 0s 6 1.37000169e+02 1.36999762e+02 1.69e-12 3.33e-16 3.16e-07 0s 7 1.37000000e+02 1.37000000e+02 2.04e-13 3.33e-16 3.19e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.37000000e+02 Root relaxation: objective 1.370000e+02, 498 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 137.00000 0 8 260.00000 137.00000 47.3% - 0s H 0 0 138.0000000 137.00000 0.72% - 0s H 0 0 137.0000000 137.00000 0.0% - 0s Explored 0 nodes (681 simplex iterations) in 0.04 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.370000000000e+02, best bound 1.370000000000e+02, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.04 seconds Total run time: 0.08 seconds Objective: 137 Solution: 1 x [2, 11, 51, 89] 8 x [30, 42, 83, 89] 5 x [54, 65, 78, 87] 2 x [36, 55, 78, 91] 1 x [65, 86, 87, 100] 1 x [45, 67, 67, 72] 2 x [10, 35, 62, 66] 6 x [10, 35, 68, 79] 2 x [6, 34, 60, 82] 5 x [8, 13, 44, 67] 1 x [8, 33, 48, 97] 10 x [4, 21, 69, 94] 1 x [44, 52, 63, 98] 6 x [36, 47, 49, 98] 2 x [30, 77, 98, 100] 4 x [23, 31, 59, 96] 2 x [73, 74, 77, 95] 1 x [12, 57, 72, 95] 4 x [9, 43, 51, 92] 3 x [16, 46, 58, 85] 1 x [9, 27, 71, 72] 4 x [2, 9, 27, 53] 10 x [22, 25, 32, 61] 5 x [14, 24, 28, 76] 1 x [49, 63, 70, 76] 2 x [14, 63, 64, 88] 5 x [19, 23, 48, 52] 1 x [1, 52, 63, 84] 2 x [31, 50, 77, 99] 7 x [26, 29, 39, 80] 3 x [39, 48, 67, 97] 2 x [3, 38, 77, 99] 3 x [7, 26, 37, 84] 1 x [37, 48, 63, 70] 1 x [19, 40, 63, 70] 8 x [1, 5, 81, 88] 1 x [1, 14, 41, 56] 3 x [7, 75, 80, 90] 2 x [18, 63, 99, 99] 3 x [11, 15, 17, 20] 5 x [11, 15, 16, 93]