current bounds on the number of colors: 0 -- 75 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:43 2012 Optimize a model with 10620 rows, 3060 columns and 34410 nonzeros Presolve time: 0.06s Presolved: 10620 rows, 3060 columns, 34410 nonzeros Variable types: 0 continuous, 3060 integer (3060 binary) Root relaxation: objective 0.000000e+00, 206 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 (345 simplex iterations) in 0.07 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 -- 37 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:43 2012 Optimize a model with 5205 rows, 1635 columns and 16740 nonzeros Presolve time: 0.02s Presolved: 5205 rows, 1635 columns, 16740 nonzeros Variable types: 0 continuous, 1635 integer (1635 binary) Root relaxation: objective 0.000000e+00, 152 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 (285 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 -- 18 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:43 2012 Optimize a model with 2640 rows, 960 columns and 8370 nonzeros Presolve time: 0.01s Presolved: 2640 rows, 960 columns, 8370 nonzeros Variable types: 0 continuous, 960 integer (960 binary) Root relaxation: objective 0.000000e+00, 163 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 (287 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 19:38:43 2012 Optimize a model with 1215 rows, 585 columns and 3720 nonzeros Presolve time: 0.00s Presolved: 1215 rows, 585 columns, 3720 nonzeros Variable types: 0 continuous, 585 integer (585 binary) Root relaxation: objective 0.000000e+00, 160 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 94 - 0.00000 - - 0s 0 0 0.00000 0 104 - 0.00000 - - 0s 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 167 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 10 Explored 0 nodes (4349 simplex iterations) in 0.23 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 19:38:43 2012 Optimize a model with 645 rows, 435 columns and 1860 nonzeros Presolve removed 75 rows and 75 columns Presolve time: 0.00s Presolved: 570 rows, 360 columns, 1710 nonzeros Variable types: 0 continuous, 360 integer (360 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 75 - 0.00000 - - 0s Explored 0 nodes (308 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 19:38:43 2012 Optimize a model with 930 rows, 510 columns and 2790 nonzeros Presolve time: 0.00s Presolved: 930 rows, 510 columns, 2790 nonzeros Variable types: 0 continuous, 510 integer (510 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 0 146 - 0.00000 - - 0s 0 0 0.00000 0 146 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1505 simplex iterations) in 0.09 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