current bounds on the number of colors: 0 -- 38 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:37 2012 Optimize a model with 6821 rows, 1079 columns and 21071 nonzeros Presolve time: 0.02s Presolved: 6821 rows, 1079 columns, 21071 nonzeros Variable types: 0 continuous, 1079 integer (1079 binary) Root relaxation: objective 0.000000e+00, 89 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 (192 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:37 2012 Optimize a model with 3251 rows, 699 columns and 9981 nonzeros Presolve time: 0.01s Presolved: 3251 rows, 699 columns, 9981 nonzeros Variable types: 0 continuous, 699 integer (699 binary) Root relaxation: objective 0.000000e+00, 82 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 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (612 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:37 2012 Optimize a model with 1466 rows, 509 columns and 4436 nonzeros Presolve time: 0.00s Presolved: 1466 rows, 509 columns, 4436 nonzeros Variable types: 0 continuous, 509 integer (509 binary) Root relaxation: objective 0.000000e+00, 78 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 0.00000 0 76 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1362 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:37 2012 Optimize a model with 2180 rows, 585 columns and 6654 nonzeros Presolve time: 0.01s Presolved: 2180 rows, 585 columns, 6654 nonzeros Variable types: 0 continuous, 585 integer (585 binary) Root relaxation: objective 0.000000e+00, 76 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 46 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1379 simplex iterations) in 0.11 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 17:58:37 2012 Optimize a model with 2537 rows, 623 columns and 7763 nonzeros Presolve time: 0.01s Presolved: 2537 rows, 623 columns, 7763 nonzeros Variable types: 0 continuous, 623 integer (623 binary) Root relaxation: objective 0.000000e+00, 76 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 76 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 0.00000 0 133 - 0.00000 - - 0s 0 0 0.00000 0 174 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 0s 0 0 0.00000 0 165 - 0.00000 - - 1s 0 0 0.00000 0 165 - 0.00000 - - 1s 0 2 0.00000 0 165 - 0.00000 - - 1s Cutting planes: Clique: 43 Zero half: 6 Explored 9 nodes (13823 simplex iterations) in 1.52 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:39 2012 Optimize a model with 2894 rows, 661 columns and 8872 nonzeros Presolve time: 0.01s Presolved: 2894 rows, 661 columns, 8872 nonzeros Variable types: 0 continuous, 661 integer (661 binary) Root relaxation: objective 0.000000e+00, 78 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 32 - 0.00000 - - 0s 0 0 0.00000 0 24 - 0.00000 - - 0s 0 0 0.00000 0 16 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2567 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: 8