current bounds on the number of colors: 0 -- 76 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:00 2012 Optimize a model with 10032 rows, 3150 columns and 32756 nonzeros Presolve time: 0.05s Presolved: 10032 rows, 3150 columns, 32756 nonzeros Variable types: 0 continuous, 3150 integer (3150 binary) Root relaxation: objective 0.000000e+00, 218 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 (377 simplex iterations) in 0.08 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 Thu Dec 13 19:39:00 2012 Optimize a model with 5054 rows, 1706 columns and 16378 nonzeros Presolve time: 0.02s Presolved: 5054 rows, 1706 columns, 16378 nonzeros Variable types: 0 continuous, 1706 integer (1706 binary) Root relaxation: objective 0.000000e+00, 168 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 (280 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:00 2012 Optimize a model with 2434 rows, 946 columns and 7758 nonzeros Presolve time: 0.01s Presolved: 2434 rows, 946 columns, 7758 nonzeros Variable types: 0 continuous, 946 integer (946 binary) Root relaxation: objective 0.000000e+00, 166 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 (293 simplex iterations) in 0.01 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 19:39:01 2012 Optimize a model with 1124 rows, 566 columns and 3448 nonzeros Presolve time: 0.00s Presolved: 1124 rows, 566 columns, 3448 nonzeros Variable types: 0 continuous, 566 integer (566 binary) Root relaxation: objective 0.000000e+00, 171 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 85 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 5 Explored 0 nodes (2754 simplex iterations) in 0.13 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 Thu Dec 13 19:39:01 2012 Optimize a model with 600 rows, 414 columns and 1724 nonzeros Presolve removed 76 rows and 76 columns Presolve time: 0.00s Presolved: 524 rows, 338 columns, 1572 nonzeros Variable types: 0 continuous, 338 integer (338 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 76 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (292 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 Thu Dec 13 19:39:01 2012 Optimize a model with 862 rows, 490 columns and 2586 nonzeros Presolve time: 0.00s Presolved: 862 rows, 490 columns, 2586 nonzeros Variable types: 0 continuous, 490 integer (490 binary) Root relaxation: objective 0.000000e+00, 172 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 0 142 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1495 simplex iterations) in 0.08 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