current bounds on the number of colors: 0 -- 36 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:06 2012 Optimize a model with 6030 rows, 981 columns and 18630 nonzeros Presolve time: 0.02s Presolved: 6030 rows, 981 columns, 18630 nonzeros Variable types: 0 continuous, 981 integer (981 binary) Root relaxation: objective 0.000000e+00, 81 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 (244 simplex iterations) in 0.04 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 -- 18 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:07 2012 Optimize a model with 3033 rows, 657 columns and 9315 nonzeros Presolve time: 0.01s Presolved: 3033 rows, 657 columns, 9315 nonzeros Variable types: 0 continuous, 657 integer (657 binary) Root relaxation: objective 0.000000e+00, 77 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 31 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (745 simplex iterations) in 0.04 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:07 2012 Optimize a model with 1368 rows, 477 columns and 4140 nonzeros Presolve time: 0.00s Presolved: 1368 rows, 477 columns, 4140 nonzeros Variable types: 0 continuous, 477 integer (477 binary) Root relaxation: objective 0.000000e+00, 72 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 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Clique: 127 Zero half: 199 Explored 0 nodes (581 simplex iterations) in 0.04 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:07 2012 Optimize a model with 2034 rows, 549 columns and 6210 nonzeros Presolve time: 0.01s Presolved: 2034 rows, 549 columns, 6210 nonzeros Variable types: 0 continuous, 549 integer (549 binary) Root relaxation: objective 0.000000e+00, 73 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 68 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1356 simplex iterations) in 0.13 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:07 2012 Optimize a model with 2367 rows, 585 columns and 7245 nonzeros Presolve time: 0.01s Presolved: 2367 rows, 585 columns, 7245 nonzeros Variable types: 0 continuous, 585 integer (585 binary) Root relaxation: objective 0.000000e+00, 73 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 28 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1582 simplex iterations) in 0.12 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:07 2012 Optimize a model with 2700 rows, 621 columns and 8280 nonzeros Presolve time: 0.01s Presolved: 2700 rows, 621 columns, 8280 nonzeros Variable types: 0 continuous, 621 integer (621 binary) Root relaxation: objective 0.000000e+00, 74 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 42 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 77 - 0.00000 - - 0s 0 0 0.00000 0 73 - 0.00000 - - 0s 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 23 - 0.00000 - - 0s 0 0 0.00000 0 16 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 16 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 2 Zero half: 6 Explored 0 nodes (12238 simplex iterations) in 1.06 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: 8