current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:39 2012 Optimize a model with 43776 rows, 12126 columns and 142424 nonzeros Presolve time: 0.15s Presolved: 43776 rows, 12126 columns, 142424 nonzeros Variable types: 0 continuous, 12126 integer (12126 binary) Root relaxation: objective 0.000000e+00, 549 iterations, 0.04 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 (905 simplex iterations) in 0.26 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:40 2012 Optimize a model with 21964 rows, 6350 columns and 71212 nonzeros Presolve time: 0.12s Presolved: 21964 rows, 6350 columns, 71212 nonzeros Variable types: 0 continuous, 6350 integer (6350 binary) Root relaxation: objective 0.000000e+00, 406 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 (695 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:41 2012 Optimize a model with 11058 rows, 3462 columns and 35606 nonzeros Presolve time: 0.04s Presolved: 11058 rows, 3462 columns, 35606 nonzeros Variable types: 0 continuous, 3462 integer (3462 binary) Root relaxation: objective 0.000000e+00, 310 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 (562 simplex iterations) in 0.06 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% current bounds on the number of colors: 0 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:41 2012 Optimize a model with 5318 rows, 1942 columns and 16866 nonzeros Presolve time: 0.02s Presolved: 5318 rows, 1942 columns, 16866 nonzeros Variable types: 0 continuous, 1942 integer (1942 binary) Root relaxation: objective 0.000000e+00, 324 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 (603 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 Fri Dec 14 18:50:41 2012 Optimize a model with 2448 rows, 1182 columns and 7496 nonzeros Presolve time: 0.01s Presolved: 2448 rows, 1182 columns, 7496 nonzeros Variable types: 0 continuous, 1182 integer (1182 binary) Root relaxation: objective 0.000000e+00, 347 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 0 187 - 0.00000 - - 0s 0 0 0.00000 0 247 - 0.00000 - - 0s Cutting planes: Clique: 3 Zero half: 1 Explored 0 nodes (5355 simplex iterations) in 0.38 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:41 2012 Optimize a model with 1300 rows, 878 columns and 3748 nonzeros Presolve removed 152 rows and 152 columns Presolve time: 0.00s Presolved: 1148 rows, 726 columns, 3444 nonzeros Variable types: 0 continuous, 726 integer (726 binary) Root relaxation: objective 0.000000e+00, 157 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 0 152 - 0.00000 - - 0s Explored 0 nodes (655 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:41 2012 Optimize a model with 1874 rows, 1030 columns and 5622 nonzeros Presolve time: 0.00s Presolved: 1874 rows, 1030 columns, 5622 nonzeros Variable types: 0 continuous, 1030 integer (1030 binary) Root relaxation: objective 0.000000e+00, 350 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 0 302 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 376 - 0.00000 - - 0s 0 0 0.00000 0 381 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 360 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Zero half: 228 Explored 0 nodes (10818 simplex iterations) in 1.09 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4