Build (method = -2) #dp: 3204 Step-3' Graph: 90 vertices and 875 arcs (0.01s) Step-4' Graph: 59 vertices and 813 arcs (0.01s) #V4/#V3 = 0.66 #A4/#A3 = 0.93 Ready! (0.01s) Optimize a model with 117 rows, 814 columns and 2329 nonzeros Presolve removed 26 rows and 38 columns Presolve time: 0.02s Presolved: 91 rows, 776 columns, 2216 nonzeros Variable types: 0 continuous, 776 integer (405 binary) Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 63.0000000 Optimize a model with 91 rows, 776 columns and 2216 nonzeros Presolved: 91 rows, 776 columns, 2216 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.287e+03 Factor NZ : 2.634e+03 Factor Ops : 1.029e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.91817187e+03 -4.44217859e+03 6.77e+03 2.57e-01 2.55e+01 0s 1 5.49828133e+02 -1.28269981e+03 1.23e+03 5.55e-16 4.80e+00 0s 2 1.29463582e+02 -4.10501415e+02 1.08e+02 1.44e-15 6.21e-01 0s 3 6.67648999e+01 -2.94919431e+01 6.00e+00 5.00e-16 7.11e-02 0s 4 4.98495355e+01 1.98138466e+01 8.28e-01 4.44e-16 1.98e-02 0s 5 4.50688359e+01 3.00393731e+01 2.43e-01 4.44e-16 9.68e-03 0s 6 4.31673286e+01 3.73858474e+01 8.83e-02 5.55e-16 3.70e-03 0s 7 4.23484056e+01 3.97533073e+01 3.44e-02 5.75e-16 1.66e-03 0s 8 4.18428207e+01 4.08144591e+01 7.61e-03 6.66e-16 6.55e-04 0s 9 4.16029836e+01 4.11610542e+01 2.29e-03 6.66e-16 2.81e-04 0s 10 4.15095490e+01 4.13802315e+01 6.33e-04 4.44e-16 8.24e-05 0s 11 4.14682209e+01 4.14489794e+01 7.81e-05 4.73e-16 1.23e-05 0s 12 4.14607185e+01 4.14599641e+01 2.06e-06 3.39e-16 4.80e-07 0s 13 4.14603177e+01 4.14603173e+01 1.09e-09 7.77e-16 2.74e-10 0s 14 4.14603175e+01 4.14603175e+01 4.50e-14 5.55e-16 2.84e-16 0s Barrier solved model in 14 iterations and 0.01 seconds Optimal objective 4.14603175e+01 Root relaxation: objective 4.146032e+01, 70 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.46032 0 35 63.00000 41.46032 34.2% - 0s H 0 0 43.0000000 41.46032 3.58% - 0s H 0 0 42.0000000 41.46032 1.28% - 0s Explored 0 nodes (203 simplex iterations) in 0.05 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.05 seconds Total run time: 0.08 seconds Objective: 42 Solution: 1 x [20, 58] 1 x [21, 57] 1 x [20, 57] 1 x [4, 57] 2 x [22, 56] 1 x [22, 55] 1 x [24, 54] 1 x [23, 54] 1 x [6, 54] 1 x [25, 53] 1 x [1, 13, 53] 1 x [2, 12, 52] 1 x [3, 11, 52] 1 x [5, 52] 1 x [27, 51] 1 x [28, 50] 2 x [29, 49] 1 x [7, 12, 49] 1 x [9, 10, 49] 1 x [30, 48] 1 x [5, 15, 47] 1 x [6, 14, 47] 1 x [31, 46] 1 x [10, 12, 46] 2 x [32, 45] 1 x [1, 19, 44] 1 x [34, 43] 1 x [33, 43] 1 x [35, 42] 2 x [36, 41] 1 x [37, 40] 1 x [7, 18, 39] 1 x [12, 17, 39] 1 x [8, 18, 38] 1 x [10, 19, 35] 1 x [9, 22, 32] 1 x [16, 19, 28] 1 x [11, 26, 27]