current bounds on the number of colors: 0 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:13 2012 Optimize a model with 6917 rows, 3106 columns and 23446 nonzeros Presolve time: 0.04s Presolved: 6917 rows, 3106 columns, 23446 nonzeros Variable types: 0 continuous, 3106 integer (3106 binary) Root relaxation: objective 0.000000e+00, 183 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 (183 simplex iterations) in 0.05 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 18:21:13 2012 Optimize a model with 3497 rows, 1643 columns and 11723 nonzeros Presolve time: 0.01s Presolved: 3497 rows, 1643 columns, 11723 nonzeros Variable types: 0 continuous, 1643 integer (1643 binary) Root relaxation: objective 0.000000e+00, 187 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 (310 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:13 2012 Optimize a model with 1697 rows, 873 columns and 5553 nonzeros Presolve time: 0.01s Presolved: 1697 rows, 873 columns, 5553 nonzeros Variable types: 0 continuous, 873 integer (873 binary) Root relaxation: objective 0.000000e+00, 167 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 (277 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 Fri Dec 14 18:21:13 2012 Optimize a model with 797 rows, 488 columns and 2468 nonzeros Presolve time: 0.00s Presolved: 797 rows, 488 columns, 2468 nonzeros Variable types: 0 continuous, 488 integer (488 binary) Root relaxation: objective 0.000000e+00, 183 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 (416 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:13 2012 Optimize a model with 437 rows, 334 columns and 1234 nonzeros Presolve removed 77 rows and 77 columns Presolve time: 0.00s Presolved: 360 rows, 257 columns, 1080 nonzeros Variable types: 0 continuous, 257 integer (257 binary) Root relaxation: objective 0.000000e+00, 79 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 77 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (307 simplex iterations) in 0.00 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 18:21:13 2012 Optimize a model with 617 rows, 411 columns and 1851 nonzeros Presolve time: 0.00s Presolved: 617 rows, 411 columns, 1851 nonzeros Variable types: 0 continuous, 411 integer (411 binary) Root relaxation: objective 0.000000e+00, 185 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 0 144 - 0.00000 - - 0s 0 0 0.00000 0 130 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 145 - 0.00000 - - 0s 0 0 0.00000 0 118 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 2 0.00000 0 131 - 0.00000 - - 0s Cutting planes: Zero half: 10 Explored 11 nodes (4890 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4