Build (method = -2) #dp: 4149 Step-3' Graph: 53 vertices and 700 arcs (0.02s) Step-4' Graph: 36 vertices and 667 arcs (0.02s) #V4/#V3 = 0.68 #A4/#A3 = 0.95 Ready! (0.02s) Optimize a model with 96 rows, 668 columns and 1939 nonzeros Presolve removed 3 rows and 4 columns Presolve time: 0.01s Presolved: 93 rows, 664 columns, 1931 nonzeros Variable types: 0 continuous, 664 integer (64 binary) Found heuristic solution: objective 308.0000000 Found heuristic solution: objective 271.0000000 Optimize a model with 93 rows, 664 columns and 1931 nonzeros Presolved: 93 rows, 664 columns, 1931 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 9.240e+02 Factor NZ : 2.226e+03 Factor Ops : 6.595e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.46512811e+03 -7.45416845e+03 4.08e+03 9.07e-02 6.29e+01 0s 1 1.35560348e+03 -3.40738653e+03 5.74e+02 6.66e-16 1.04e+01 0s 2 3.50775195e+02 -1.36944427e+03 5.21e+01 5.11e-15 1.71e+00 0s 3 1.83424061e+02 -2.50287439e+02 3.02e+00 6.66e-16 3.24e-01 0s 4 1.02815164e+02 -6.65546111e+01 6.17e-01 4.44e-16 1.24e-01 0s 5 7.43489587e+01 1.10541172e+01 2.50e-01 3.33e-16 4.60e-02 0s 6 6.74548948e+01 5.11824298e+01 1.05e-01 3.33e-16 1.18e-02 0s 7 6.39900571e+01 6.08908626e+01 1.80e-02 3.64e-16 2.24e-03 0s 8 6.32033295e+01 6.31855028e+01 8.57e-13 3.51e-16 1.29e-05 0s 9 6.32000000e+01 6.32000000e+01 9.31e-13 4.44e-16 2.33e-11 0s Barrier solved model in 9 iterations and 0.01 seconds Optimal objective 6.32000000e+01 Root relaxation: objective 6.320000e+01, 522 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63.20000 0 26 271.00000 63.20000 76.7% - 0s H 0 0 64.0000000 63.20000 1.25% - 0s Explored 0 nodes (716 simplex iterations) in 0.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.400000000000e+01, best bound 6.400000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.03 seconds Total run time: 0.06 seconds Objective: 64 Solution: 2 x [14, 16, 30, 47, 58] 1 x [10, 15, 24, 41, 52] 7 x [11, 17, 33, 52, 56] 7 x [19, 29, 34, 48, 49] 1 x [7, 10, 24, 39, 45] 8 x [13, 23, 37, 45, 55] 1 x [9, 14, 36, 36, 45] 2 x [10, 26, 28, 31, 59] 1 x [1, 4, 29, 39] 2 x [18, 28, 29, 34, 59] 1 x [4, 6, 26, 54, 60] 1 x [2, 8, 9, 20, 26] 2 x [25, 27, 41, 42, 55] 1 x [4, 20, 25, 30, 46] 5 x [1, 4, 9, 25, 46] 1 x [39, 42, 50, 57] 4 x [21, 27, 27, 39, 40] 3 x [5, 32, 35, 44, 50] 2 x [8, 12, 12, 22, 35] 1 x [3, 11, 11, 35, 54] 5 x [24, 32, 43, 51, 59] 1 x [9, 12, 43, 59] 2 x [8, 9, 12, 12, 40] 1 x [3, 12, 47, 54, 57] 1 x [38, 38, 53, 53] 1 x [38, 38, 53, 53, 53]