Build (method = -2) #dp: 2562 Step-3' Graph: 116 vertices and 1317 arcs (0.01s) Step-4' Graph: 111 vertices and 1307 arcs (0.01s) #V4/#V3 = 0.96 #A4/#A3 = 0.99 Ready! (0.01s) Optimize a model with 151 rows, 1308 columns and 3706 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.03s Presolved: 131 rows, 1288 columns, 3684 nonzeros Variable types: 0 continuous, 1288 integer (856 binary) Found heuristic solution: objective 24.0000000 Optimize a model with 131 rows, 1288 columns and 3684 nonzeros Presolved: 131 rows, 1288 columns, 3684 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.664e+03 Factor NZ : 5.986e+03 Factor Ops : 3.766e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.61550643e+03 -3.52397758e+03 2.52e+03 1.84e-01 1.36e+01 0s 1 4.41006100e+02 -1.68260765e+03 5.34e+02 6.66e-16 3.12e+00 0s 2 1.08328002e+02 -6.04681152e+02 5.83e+01 4.72e-16 4.99e-01 0s 3 4.33325193e+01 -6.53650431e+01 4.59e+00 4.44e-16 5.56e-02 0s 4 2.66842389e+01 -1.38858744e+01 8.44e-01 3.78e-16 1.74e-02 0s 5 2.19474828e+01 -1.83916842e+00 3.85e-01 2.45e-16 9.72e-03 0s 6 1.88071078e+01 7.74879895e+00 1.45e-01 2.22e-16 4.39e-03 0s 7 1.84306444e+01 1.28284595e+01 1.24e-01 2.22e-16 2.22e-03 0s 8 1.73099263e+01 1.49780897e+01 5.23e-02 1.83e-16 9.15e-04 0s 9 1.67370829e+01 1.57892167e+01 1.10e-02 3.33e-16 3.69e-04 0s 10 1.65789969e+01 1.62146200e+01 2.81e-03 2.22e-16 1.41e-04 0s 11 1.65518862e+01 1.63502868e+01 2.02e-03 2.22e-16 7.82e-05 0s 12 1.65269407e+01 1.64021715e+01 1.29e-03 1.53e-16 4.84e-05 0s 13 1.65086392e+01 1.64333103e+01 8.34e-04 2.22e-16 2.92e-05 0s 14 1.64925564e+01 1.64480473e+01 4.12e-04 1.64e-16 1.72e-05 0s 15 1.64877167e+01 1.64606454e+01 3.14e-04 1.33e-16 1.05e-05 0s 16 1.64817513e+01 1.64680983e+01 7.25e-05 1.11e-16 5.29e-06 0s 17 1.64812297e+01 1.64792311e+01 4.70e-05 1.61e-16 7.74e-07 0s 18 1.64805400e+01 1.64796789e+01 2.06e-05 2.22e-16 3.34e-07 0s 19 1.64800112e+01 1.64797791e+01 3.60e-07 1.39e-16 8.99e-08 0s 20 1.64800000e+01 1.64800000e+01 9.63e-14 2.22e-16 1.92e-12 0s Barrier solved model in 20 iterations and 0.02 seconds Optimal objective 1.64800000e+01 Root relaxation: objective 1.648000e+01, 875 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.48000 0 31 24.00000 16.48000 31.3% - 0s H 0 0 20.0000000 16.48000 17.6% - 0s H 0 0 18.0000000 16.48000 8.44% - 0s H 0 0 17.0000000 16.48000 3.06% - 0s Explored 0 nodes (1870 simplex iterations) in 0.13 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.13 seconds Total run time: 0.15 seconds Objective: 17 Solution: 1 x [1, 5, 7, 40] 1 x [22, 39] 1 x [23, 38] 1 x [4, 17, 37] 1 x [6, 6, 14, 36] 1 x [6, 8, 12, 36] 1 x [2, 36] 1 x [29, 35] 1 x [10, 19, 34] 1 x [31, 33] 1 x [13, 18, 32] 1 x [3, 15, 16, 30] 1 x [9, 28, 29] 1 x [12, 26, 27] 1 x [11, 26, 26] 1 x [18, 20, 25] 1 x [17, 21, 24]