current bounds on the number of colors: 0 -- 130 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:44 2012 Optimize a model with 30160 rows, 8912 columns and 98540 nonzeros Presolve removed 1 rows and 65 columns Presolve time: 0.14s Presolved: 30159 rows, 8847 columns, 98475 nonzeros Variable types: 0 continuous, 8847 integer (8847 binary) Root relaxation: objective 0.000000e+00, 425 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 (666 simplex iterations) in 0.20 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 18:34:44 2012 Optimize a model with 14914 rows, 4622 columns and 48512 nonzeros Presolve removed 1 rows and 32 columns Presolve time: 0.07s Presolved: 14913 rows, 4590 columns, 48480 nonzeros Variable types: 0 continuous, 4590 integer (4590 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 (568 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 18:34:45 2012 Optimize a model with 7522 rows, 2542 columns and 24256 nonzeros Presolve removed 1 rows and 16 columns Presolve time: 0.03s Presolved: 7521 rows, 2526 columns, 24240 nonzeros Variable types: 0 continuous, 2526 integer (2526 binary) Root relaxation: objective 0.000000e+00, 264 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 (471 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 18:34:45 2012 Optimize a model with 3826 rows, 1502 columns and 12128 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.01s Presolved: 3825 rows, 1494 columns, 12120 nonzeros Variable types: 0 continuous, 1494 integer (1494 binary) Root relaxation: objective 0.000000e+00, 277 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 (522 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 18:34:45 2012 Optimize a model with 1978 rows, 982 columns and 6064 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 1977 rows, 978 columns, 6060 nonzeros Variable types: 0 continuous, 978 integer (978 binary) Root relaxation: objective 0.000000e+00, 294 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1912 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:45 2012 Optimize a model with 1054 rows, 722 columns and 3032 nonzeros Presolve removed 130 rows and 131 columns Presolve time: 0.00s Presolved: 924 rows, 591 columns, 2772 nonzeros Variable types: 0 continuous, 591 integer (591 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 0 129 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (547 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 18:34:45 2012 Optimize a model with 1516 rows, 852 columns and 4548 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1515 rows, 849 columns, 4545 nonzeros Variable types: 0 continuous, 849 integer (849 binary) Root relaxation: objective 0.000000e+00, 304 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 0 244 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 0s 0 0 0.00000 0 327 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Zero half: 157 Explored 0 nodes (4735 simplex iterations) in 0.35 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