Build (method = -2) #dp: 2317 Step-3' Graph: 87 vertices and 277 arcs (0.01s) Step-4' Graph: 24 vertices and 151 arcs (0.01s) #V4/#V3 = 0.28 #A4/#A3 = 0.55 Ready! (0.01s) Optimize a model with 91 rows, 152 columns and 413 nonzeros Presolve removed 53 rows and 62 columns Presolve time: 0.00s Presolved: 38 rows, 90 columns, 226 nonzeros Variable types: 0 continuous, 90 integer (17 binary) Found heuristic solution: objective 71.0000000 Found heuristic solution: objective 55.0000000 Optimize a model with 38 rows, 90 columns and 226 nonzeros Presolved: 38 rows, 90 columns, 226 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.300e+01 Factor NZ : 4.330e+02 Factor Ops : 6.391e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.62202955e+03 -1.42847858e+03 2.11e+02 2.22e-16 4.91e+01 0s 1 3.72332931e+02 -4.76415957e+02 2.94e+01 1.28e-15 7.75e+00 0s 2 8.88744432e+01 -4.82584953e+01 1.12e+00 1.24e-14 7.75e-01 0s 3 5.76008801e+01 1.44404108e+01 1.09e-02 4.88e-15 2.20e-01 0s 4 5.04945029e+01 4.68698624e+01 2.47e-04 1.44e-15 1.85e-02 0s 5 5.00050228e+01 4.99805198e+01 1.11e-06 1.67e-15 1.25e-04 0s 6 5.00000000e+01 5.00000000e+01 1.18e-12 1.33e-15 1.56e-10 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 42 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (42 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 50 Solution: 1 x [15, 67] 3 x [13, 66] 1 x [17, 65] 1 x [18, 64] 1 x [14, 63] 1 x [11, 62] 1 x [9, 61] 2 x [19, 60] 1 x [8, 59] 1 x [4, 58] 1 x [24, 57] 1 x [4, 56] 2 x [25, 55] 2 x [6, 54] 3 x [5, 53] 1 x [29, 52] 1 x [30, 51] 1 x [33, 50] 1 x [29, 49] 3 x [34, 48] 1 x [28, 47] 1 x [2, 46] 2 x [40, 45] 1 x [40, 44] 1 x [39, 43] 1 x [39, 42] 1 x [40, 41] 1 x [1, 38] 1 x [1, 37] 1 x [28, 36] 1 x [29, 35] 1 x [32, 33] 1 x [29, 31] 1 x [3, 27] 1 x [3, 26] 1 x [7, 23] 2 x [16, 22] 1 x [10, 21] 1 x [12, 20]