current bounds on the number of colors: 0 -- 96 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:48:43 2012 Optimize a model with 21600 rows, 5056 columns and 69120 nonzeros Presolve time: 0.12s Presolved: 21600 rows, 5056 columns, 69120 nonzeros Variable types: 0 continuous, 5056 integer (5056 binary) Root relaxation: objective 0.000000e+00, 275 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 (467 simplex iterations) in 0.16 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 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:48:43 2012 Optimize a model with 10848 rows, 2752 columns and 34560 nonzeros Presolve time: 0.04s Presolved: 10848 rows, 2752 columns, 34560 nonzeros Variable types: 0 continuous, 2752 integer (2752 binary) Root relaxation: objective 0.000000e+00, 203 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 (414 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:48:43 2012 Optimize a model with 5472 rows, 1600 columns and 17280 nonzeros Presolve time: 0.02s Presolved: 5472 rows, 1600 columns, 17280 nonzeros Variable types: 0 continuous, 1600 integer (1600 binary) Root relaxation: objective 0.000000e+00, 202 iterations, 0.00 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 (396 simplex iterations) in 0.03 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 19:48:43 2012 Optimize a model with 2784 rows, 1024 columns and 8640 nonzeros Presolve time: 0.01s Presolved: 2784 rows, 1024 columns, 8640 nonzeros Variable types: 0 continuous, 1024 integer (1024 binary) Root relaxation: objective 0.000000e+00, 211 iterations, 0.00 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 (681 simplex iterations) in 0.02 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:48:44 2012 Optimize a model with 1440 rows, 736 columns and 4320 nonzeros Presolve time: 0.00s Presolved: 1440 rows, 736 columns, 4320 nonzeros Variable types: 0 continuous, 736 integer (736 binary) Root relaxation: objective 0.000000e+00, 221 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 0 154 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 54 Zero half: 506 Explored 0 nodes (3640 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:48:44 2012 Optimize a model with 1888 rows, 832 columns and 5760 nonzeros Presolve time: 0.00s Presolved: 1888 rows, 832 columns, 5760 nonzeros Variable types: 0 continuous, 832 integer (832 binary) Root relaxation: objective 0.000000e+00, 209 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 0 190 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 235 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 0s 0 2 0.00000 0 185 - 0.00000 - - 0s Cutting planes: Clique: 10 Zero half: 5 Explored 362 nodes (42314 simplex iterations) in 2.45 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:48:46 2012 Optimize a model with 2336 rows, 928 columns and 7200 nonzeros Presolve time: 0.01s Presolved: 2336 rows, 928 columns, 7200 nonzeros Variable types: 0 continuous, 928 integer (928 binary) Root relaxation: objective 0.000000e+00, 201 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 12 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1750 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% optimal solution found: number of colors: 5