Build (method = -2) #dp: 8273 Step-3' Graph: 315 vertices and 3800 arcs (0.06s) Step-4' Graph: 206 vertices and 3555 arcs (0.06s) #V4/#V3 = 0.65 #A4/#A3 = 0.94 Ready! (0.06s) Optimize a model with 250 rows, 3556 columns and 10261 nonzeros Presolve removed 10 rows and 14 columns Presolve time: 0.04s Presolved: 240 rows, 3542 columns, 10258 nonzeros Variable types: 0 continuous, 3542 integer (1112 binary) Found heuristic solution: objective 66.0000000 Optimize a model with 240 rows, 3542 columns and 10258 nonzeros Presolved: 240 rows, 3542 columns, 10258 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.709e+03 Factor NZ : 1.445e+04 (roughly 2 MBytes of memory) Factor Ops : 1.141e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.44774930e+03 -3.92231991e+04 4.08e+04 1.81e-01 5.59e+01 0s 1 1.52498494e+03 -1.07759220e+04 8.82e+03 7.77e-16 1.21e+01 0s 2 3.70358115e+02 -4.64957645e+03 8.80e+02 9.99e-16 1.66e+00 0s 3 2.38011506e+02 -1.19304784e+03 1.47e+02 3.72e-15 3.19e-01 0s 4 1.44602018e+02 -2.47872298e+02 4.17e+01 2.22e-15 7.98e-02 0s 5 1.01417653e+02 -1.23240577e+02 2.43e+01 3.55e-15 4.35e-02 0s 6 7.12543316e+01 -1.11558206e+02 1.51e+01 2.22e-15 3.30e-02 0s 7 6.72815384e+01 -5.83020426e+01 1.40e+01 1.55e-15 2.37e-02 0s 8 3.89005999e+01 -2.75126044e+01 7.24e+00 1.52e-15 1.21e-02 0s 9 2.70632172e+01 -1.87030619e+01 3.75e+00 1.75e-15 7.77e-03 0s 10 2.34121268e+01 -9.77361923e+00 2.53e+00 1.60e-15 5.44e-03 0s 11 2.17650427e+01 4.30098147e+00 1.55e+00 1.29e-15 2.76e-03 0s 12 2.06996754e+01 1.08031778e+01 1.00e+00 2.00e-15 1.52e-03 0s 13 1.93017688e+01 1.33959547e+01 4.89e-01 1.68e-15 8.80e-04 0s 14 1.84658006e+01 1.55578010e+01 2.00e-01 1.39e-15 4.23e-04 0s 15 1.81526240e+01 1.67324484e+01 1.12e-01 1.30e-15 2.06e-04 0s 16 1.78486371e+01 1.73444453e+01 3.51e-02 1.55e-15 7.26e-05 0s 17 1.77533210e+01 1.75191261e+01 1.92e-02 1.38e-15 3.38e-05 0s 18 1.76872337e+01 1.75801564e+01 9.32e-03 2.44e-15 1.55e-05 0s 19 1.76377180e+01 1.76067788e+01 2.17e-03 1.33e-15 4.45e-06 0s 20 1.76226777e+01 1.76204033e+01 1.17e-04 1.35e-15 3.25e-07 0s 21 1.76217399e+01 1.76217353e+01 5.99e-08 1.28e-15 6.54e-10 0s 22 1.76217391e+01 1.76217391e+01 2.60e-14 1.28e-15 6.54e-13 0s Barrier solved model in 22 iterations and 0.06 seconds Optimal objective 1.76217391e+01 Root relaxation: objective 1.762174e+01, 1282 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17.62174 0 58 66.00000 17.62174 73.3% - 0s H 0 0 19.0000000 17.62174 7.25% - 0s H 0 0 18.0000000 17.62174 2.10% - 0s Explored 0 nodes (3315 simplex iterations) in 0.38 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0% Preprocessing time: 0.08 seconds Gurobi run time: 0.38 seconds Total run time: 0.45 seconds Objective: 18 Solution: 2 x [35, 38, 41, 43, 44] 1 x [34, 35, 41, 42, 43] 1 x [30, 30, 35, 40] 1 x [29, 31, 36, 37, 39] 1 x [31, 32, 33, 37, 38] 1 x [4, 11, 14, 15, 17, 29] 1 x [2, 11, 13, 16, 20, 28] 1 x [2, 2, 10, 24, 26, 27] 1 x [1, 6, 12, 19, 26, 27] 1 x [4, 5, 8, 20, 27, 27] 1 x [3, 3, 17, 20, 24, 25] 1 x [1, 12, 13, 15, 23, 25] 1 x [3, 6, 17, 20, 21, 25] 1 x [3, 6, 9, 22, 25, 25] 1 x [7, 10, 18, 18, 19] 1 x [7, 10, 18, 18, 18, 19] 1 x [11, 13, 13, 15, 17, 19]