current bounds on the number of colors: 0 -- 56 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:46:55 2012 Optimize a model with 22764 rows, 2379 columns and 69692 nonzeros Presolve time: 0.10s Presolved: 22764 rows, 2379 columns, 69692 nonzeros Variable types: 0 continuous, 2379 integer (2379 binary) Root relaxation: objective 0.000000e+00, 122 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (375 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:46:56 2012 Optimize a model with 11410 rows, 1595 columns and 34846 nonzeros Presolve time: 0.04s Presolved: 11410 rows, 1595 columns, 34846 nonzeros Variable types: 0 continuous, 1595 integer (1595 binary) Root relaxation: objective 0.000000e+00, 122 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1247 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:46:56 2012 Optimize a model with 5733 rows, 1203 columns and 17423 nonzeros Presolve time: 0.02s Presolved: 5733 rows, 1203 columns, 17423 nonzeros Variable types: 0 continuous, 1203 integer (1203 binary) Root relaxation: objective 0.000000e+00, 112 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3188 simplex iterations) in 0.51 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 7 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:46:57 2012 Optimize a model with 8166 rows, 1371 columns and 24890 nonzeros Presolve time: 0.02s Presolved: 8166 rows, 1371 columns, 24890 nonzeros Variable types: 0 continuous, 1371 integer (1371 binary) Root relaxation: objective 0.000000e+00, 124 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 73 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 1s 0 0 0.00000 0 209 - 0.00000 - - 1s 0 0 0.00000 0 147 - 0.00000 - - 2s 0 0 0.00000 0 131 - 0.00000 - - 3s 0 0 0.00000 0 140 - 0.00000 - - 4s 0 0 0.00000 0 161 - 0.00000 - - 4s 0 0 0.00000 0 151 - 0.00000 - - 5s 0 0 0.00000 0 147 - 0.00000 - - 6s 0 0 0.00000 0 237 - 0.00000 - - 7s 0 0 0.00000 0 146 - 0.00000 - - 8s 0 2 0.00000 0 146 - 0.00000 - - 9s 33 13 0.00000 17 92 - 0.00000 - 150 10s 593 9 infeasible 23 - 0.00000 - 106 15s 805 21 0.00000 0 141 - 0.00000 - 113 21s 808 23 0.00000 0 150 - 0.00000 - 113 25s 811 25 0.00000 0 227 - 0.00000 - 112 31s 824 27 0.00000 19 159 - 0.00000 - 163 35s 1116 15 0.00000 27 131 - 0.00000 - 155 40s 1521 14 0.00000 24 138 - 0.00000 - 152 45s 1916 13 0.00000 27 114 - 0.00000 - 150 50s 2290 13 0.00000 27 137 - 0.00000 - 150 55s 2630 17 infeasible 30 - 0.00000 - 152 60s 2982 7 0.00000 26 114 - 0.00000 - 152 65s Cutting planes: Clique: 34 Zero half: 2 Explored 3178 nodes (529498 simplex iterations) in 67.93 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 10 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:48:05 2012 Optimize a model with 9788 rows, 1483 columns and 29868 nonzeros Presolve time: 0.03s Presolved: 9788 rows, 1483 columns, 29868 nonzeros Variable types: 0 continuous, 1483 integer (1483 binary) Root relaxation: objective 0.000000e+00, 124 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 58 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 50 Zero half: 51 Explored 0 nodes (1407 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 10 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:48:05 2012 Optimize a model with 8977 rows, 1427 columns and 27379 nonzeros Presolve time: 0.03s Presolved: 8977 rows, 1427 columns, 27379 nonzeros Variable types: 0 continuous, 1427 integer (1427 binary) Root relaxation: objective 0.000000e+00, 125 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 51 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 4 Clique: 52 MIR: 2 Zero half: 16 Explored 0 nodes (2344 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 11