current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:55 2012 Optimize a model with 18019 rows, 2069 columns and 55276 nonzeros Presolve time: 0.07s Presolved: 18019 rows, 2069 columns, 55276 nonzeros Variable types: 0 continuous, 2069 integer (2069 binary) Root relaxation: objective 0.000000e+00, 130 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 (371 simplex iterations) in 0.12 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:55 2012 Optimize a model with 9036 rows, 1380 columns and 27638 nonzeros Presolve time: 0.03s Presolved: 9036 rows, 1380 columns, 27638 nonzeros Variable types: 0 continuous, 1380 integer (1380 binary) Root relaxation: objective 0.000000e+00, 109 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 (603 simplex iterations) in 0.07 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:55 2012 Optimize a model with 4199 rows, 1009 columns and 12756 nonzeros Presolve time: 0.01s Presolved: 4199 rows, 1009 columns, 12756 nonzeros Variable types: 0 continuous, 1009 integer (1009 binary) Root relaxation: objective 0.000000e+00, 106 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 78 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2637 simplex iterations) in 0.34 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: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:56 2012 Optimize a model with 6272 rows, 1168 columns and 19134 nonzeros Presolve time: 0.02s Presolved: 6272 rows, 1168 columns, 19134 nonzeros Variable types: 0 continuous, 1168 integer (1168 binary) Root relaxation: objective 0.000000e+00, 120 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 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 176 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 1s 0 0 0.00000 0 160 - 0.00000 - - 1s 0 0 0.00000 0 153 - 0.00000 - - 2s 0 0 0.00000 0 157 - 0.00000 - - 3s 0 0 0.00000 0 178 - 0.00000 - - 4s 0 0 0.00000 0 143 - 0.00000 - - 5s 0 0 0.00000 0 163 - 0.00000 - - 5s 0 0 0.00000 0 161 - 0.00000 - - 6s 0 2 0.00000 0 160 - 0.00000 - - 7s 175 11 infeasible 12 - 0.00000 - 160 10s 610 2 infeasible 12 - 0.00000 - 137 15s Cutting planes: Clique: 150 Zero half: 8 Explored 645 nodes (124033 simplex iterations) in 15.39 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:11 2012 Optimize a model with 7654 rows, 1274 columns and 23386 nonzeros Presolve time: 0.02s Presolved: 7654 rows, 1274 columns, 23386 nonzeros Variable types: 0 continuous, 1274 integer (1274 binary) Root relaxation: objective 0.000000e+00, 120 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 54 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (891 simplex iterations) in 0.08 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:28:12 2012 Optimize a model with 6963 rows, 1221 columns and 21260 nonzeros Presolve time: 0.02s Presolved: 6963 rows, 1221 columns, 21260 nonzeros Variable types: 0 continuous, 1221 integer (1221 binary) Root relaxation: objective 0.000000e+00, 109 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 38 - 0.00000 - - 0s 0 0 0.00000 0 81 - 0.00000 - - 0s 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 1s 0 0 0.00000 0 18 - 0.00000 - - 1s 0 0 0.00000 0 115 - 0.00000 - - 1s 0 0 0.00000 0 26 - 0.00000 - - 2s 0 0 0.00000 0 126 - 0.00000 - - 2s 0 0 0.00000 0 184 - 0.00000 - - 3s 0 0 0.00000 0 141 - 0.00000 - - 3s 0 2 0.00000 0 141 - 0.00000 - - 3s * 98 5 22 0.0000000 0.00000 0.0% 86.4 4s Cutting planes: Clique: 22 Zero half: 6 Explored 99 nodes (32649 simplex iterations) in 4.87 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: 10