current bounds on the number of colors: 0 -- 131 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:58 2012 Optimize a model with 29641 rows, 8969 columns and 97045 nonzeros Presolve time: 0.14s Presolved: 29641 rows, 8969 columns, 97045 nonzeros Variable types: 0 continuous, 8969 integer (8969 binary) Root relaxation: objective 0.000000e+00, 428 iterations, 0.02 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 (716 simplex iterations) in 0.21 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 -- 65 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:58 2012 Optimize a model with 14659 rows, 4646 columns and 47776 nonzeros Presolve time: 0.07s Presolved: 14659 rows, 4646 columns, 47776 nonzeros Variable types: 0 continuous, 4646 integer (4646 binary) Root relaxation: objective 0.000000e+00, 326 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 (577 simplex iterations) in 0.10 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:59 2012 Optimize a model with 7395 rows, 2550 columns and 23888 nonzeros Presolve time: 0.03s Presolved: 7395 rows, 2550 columns, 23888 nonzeros Variable types: 0 continuous, 2550 integer (2550 binary) Root relaxation: objective 0.000000e+00, 269 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 (493 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:59 2012 Optimize a model with 3763 rows, 1502 columns and 11944 nonzeros Presolve time: 0.01s Presolved: 3763 rows, 1502 columns, 11944 nonzeros Variable types: 0 continuous, 1502 integer (1502 binary) Root relaxation: objective 0.000000e+00, 292 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 (514 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:59 2012 Optimize a model with 1947 rows, 978 columns and 5972 nonzeros Presolve time: 0.01s Presolved: 1947 rows, 978 columns, 5972 nonzeros Variable types: 0 continuous, 978 integer (978 binary) Root relaxation: objective 0.000000e+00, 324 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1809 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:59 2012 Optimize a model with 1039 rows, 716 columns and 2986 nonzeros Presolve removed 131 rows and 131 columns Presolve time: 0.00s Presolved: 908 rows, 585 columns, 2724 nonzeros Variable types: 0 continuous, 585 integer (585 binary) Root relaxation: objective 0.000000e+00, 138 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 0 131 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (561 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 18:34:59 2012 Optimize a model with 1493 rows, 847 columns and 4479 nonzeros Presolve time: 0.00s Presolved: 1493 rows, 847 columns, 4479 nonzeros Variable types: 0 continuous, 847 integer (847 binary) Root relaxation: objective 0.000000e+00, 302 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 0 250 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 279 - 0.00000 - - 1s 0 2 0.00000 0 279 - 0.00000 - - 1s Cutting planes: Zero half: 7 Explored 3 nodes (13128 simplex iterations) in 1.13 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