current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:01 2012 Optimize a model with 19089 rows, 2163 columns and 58563 nonzeros Presolve time: 0.08s Presolved: 19089 rows, 2163 columns, 58563 nonzeros Variable types: 0 continuous, 2163 integer (2163 binary) Root relaxation: objective 0.000000e+00, 148 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 (342 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:02 2012 Optimize a model with 9219 rows, 1407 columns and 28197 nonzeros Presolve time: 0.03s Presolved: 9219 rows, 1407 columns, 28197 nonzeros Variable types: 0 continuous, 1407 integer (1407 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (568 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 18:30:02 2012 Optimize a model with 4284 rows, 1029 columns and 13014 nonzeros Presolve time: 0.01s Presolved: 4284 rows, 1029 columns, 13014 nonzeros Variable types: 0 continuous, 1029 integer (1029 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 80 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2626 simplex iterations) in 0.36 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 18:30:02 2012 Optimize a model with 6399 rows, 1191 columns and 19521 nonzeros Presolve time: 0.02s Presolved: 6399 rows, 1191 columns, 19521 nonzeros Variable types: 0 continuous, 1191 integer (1191 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 48 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 1s 0 0 0.00000 0 180 - 0.00000 - - 1s 0 0 0.00000 0 181 - 0.00000 - - 2s 0 0 0.00000 0 192 - 0.00000 - - 3s 0 0 0.00000 0 224 - 0.00000 - - 4s 0 0 0.00000 0 224 - 0.00000 - - 4s 0 2 0.00000 0 224 - 0.00000 - - 5s Cutting planes: Clique: 107 Zero half: 2 Explored 295 nodes (68482 simplex iterations) in 9.05 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 18:30:12 2012 Optimize a model with 7809 rows, 1299 columns and 23859 nonzeros Presolve time: 0.02s Presolved: 7809 rows, 1299 columns, 23859 nonzeros Variable types: 0 continuous, 1299 integer (1299 binary) Root relaxation: objective 0.000000e+00, 118 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 26 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1208 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 18:30:12 2012 Optimize a model with 7104 rows, 1245 columns and 21690 nonzeros Presolve time: 0.02s Presolved: 7104 rows, 1245 columns, 21690 nonzeros Variable types: 0 continuous, 1245 integer (1245 binary) Root relaxation: objective 0.000000e+00, 126 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 34 - 0.00000 - - 0s 0 0 0.00000 0 55 - 0.00000 - - 0s 0 0 0.00000 0 51 - 0.00000 - - 1s 0 0 0.00000 0 148 - 0.00000 - - 1s 0 0 0.00000 0 45 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 11 Zero half: 32 Explored 0 nodes (11535 simplex iterations) in 1.46 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