current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:09 2012 Optimize a model with 14160 rows, 1740 columns and 43488 nonzeros Presolve time: 0.05s Presolved: 14160 rows, 1740 columns, 43488 nonzeros Variable types: 0 continuous, 1740 integer (1740 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (301 simplex iterations) in 0.09 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:09 2012 Optimize a model with 7104 rows, 1164 columns and 21744 nonzeros Presolve time: 0.02s Presolved: 7104 rows, 1164 columns, 21744 nonzeros Variable types: 0 continuous, 1164 integer (1164 binary) Root relaxation: objective 0.000000e+00, 104 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1033 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: 0 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:09 2012 Optimize a model with 3576 rows, 876 columns and 10872 nonzeros Presolve time: 0.01s Presolved: 3576 rows, 876 columns, 10872 nonzeros Variable types: 0 continuous, 876 integer (876 binary) Root relaxation: objective 0.000000e+00, 98 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 56 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2504 simplex iterations) in 0.31 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:09 2012 Optimize a model with 5340 rows, 1020 columns and 16308 nonzeros Presolve time: 0.01s Presolved: 5340 rows, 1020 columns, 16308 nonzeros Variable types: 0 continuous, 1020 integer (1020 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 50 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 0.00000 0 39 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 101 - 0.00000 - - 1s 0 0 0.00000 0 127 - 0.00000 - - 1s 0 0 0.00000 0 81 - 0.00000 - - 1s 0 0 0.00000 0 95 - 0.00000 - - 1s 0 0 0.00000 0 148 - 0.00000 - - 2s 0 0 0.00000 0 148 - 0.00000 - - 3s 0 2 0.00000 0 148 - 0.00000 - - 3s 90 6 infeasible 12 - 0.00000 - 107 5s 606 21 0.00000 0 96 - 0.00000 - 91.0 10s 613 26 0.00000 0 154 - 0.00000 - 90.0 16s 682 16 0.00000 18 152 - 0.00000 - 134 20s 1215 12 0.00000 28 119 - 0.00000 - 127 25s Cutting planes: Clique: 8 Zero half: 1 Explored 1626 nodes (226366 simplex iterations) in 28.52 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:38 2012 Optimize a model with 5928 rows, 1068 columns and 18120 nonzeros Presolve time: 0.02s Presolved: 5928 rows, 1068 columns, 18120 nonzeros Variable types: 0 continuous, 1068 integer (1068 binary) Root relaxation: objective 0.000000e+00, 102 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 36 - 0.00000 - - 0s 0 0 0.00000 0 39 - 0.00000 - - 0s Cutting planes: Clique: 5 Explored 0 nodes (1970 simplex iterations) in 0.19 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