current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:39 2012 Optimize a model with 19170 rows, 2166 columns and 58806 nonzeros Presolve time: 0.08s Presolved: 19170 rows, 2166 columns, 58806 nonzeros Variable types: 0 continuous, 2166 integer (2166 binary) Root relaxation: objective 0.000000e+00, 141 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 (413 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:39 2012 Optimize a model with 9258 rows, 1410 columns and 28314 nonzeros Presolve time: 0.03s Presolved: 9258 rows, 1410 columns, 28314 nonzeros Variable types: 0 continuous, 1410 integer (1410 binary) Root relaxation: objective 0.000000e+00, 123 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 40 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1124 simplex iterations) in 0.11 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 18:30:40 2012 Optimize a model with 4302 rows, 1032 columns and 13068 nonzeros Presolve time: 0.01s Presolved: 4302 rows, 1032 columns, 13068 nonzeros Variable types: 0 continuous, 1032 integer (1032 binary) Root relaxation: objective 0.000000e+00, 108 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 74 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2421 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 18:30:40 2012 Optimize a model with 6426 rows, 1194 columns and 19602 nonzeros Presolve time: 0.02s Presolved: 6426 rows, 1194 columns, 19602 nonzeros Variable types: 0 continuous, 1194 integer (1194 binary) Root relaxation: objective 0.000000e+00, 119 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 44 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 141 - 0.00000 - - 1s 0 0 0.00000 0 219 - 0.00000 - - 1s 0 0 0.00000 0 183 - 0.00000 - - 1s 0 0 0.00000 0 149 - 0.00000 - - 2s 0 0 0.00000 0 127 - 0.00000 - - 3s 0 0 0.00000 0 132 - 0.00000 - - 4s 0 0 0.00000 0 96 - 0.00000 - - 4s 0 0 0.00000 0 107 - 0.00000 - - 5s 0 0 0.00000 0 96 - 0.00000 - - 5s 0 0 0.00000 0 119 - 0.00000 - - 6s 0 0 0.00000 0 119 - 0.00000 - - 7s 0 2 0.00000 0 119 - 0.00000 - - 8s 15 11 0.00000 11 161 - 0.00000 - 254 10s Cutting planes: Clique: 160 Zero half: 3 Explored 317 nodes (91306 simplex iterations) in 14.50 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 18:30:55 2012 Optimize a model with 7842 rows, 1302 columns and 23958 nonzeros Presolve time: 0.02s Presolved: 7842 rows, 1302 columns, 23958 nonzeros Variable types: 0 continuous, 1302 integer (1302 binary) Root relaxation: objective 0.000000e+00, 115 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 40 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1181 simplex iterations) in 0.10 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 18:30:55 2012 Optimize a model with 7134 rows, 1248 columns and 21780 nonzeros Presolve time: 0.02s Presolved: 7134 rows, 1248 columns, 21780 nonzeros Variable types: 0 continuous, 1248 integer (1248 binary) Root relaxation: objective 0.000000e+00, 119 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 32 - 0.00000 - - 0s 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 119 - 0.00000 - - 0s 0 0 0.00000 0 169 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 1s 0 0 0.00000 0 136 - 0.00000 - - 2s 0 0 0.00000 0 162 - 0.00000 - - 2s 0 0 0.00000 0 38 - 0.00000 - - 3s * 0 0 0 0.0000000 0.00000 0.0% - 4s Cutting planes: Clique: 19 Zero half: 26 Explored 0 nodes (28305 simplex iterations) in 4.15 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% optimal solution found: number of colors: 10