current bounds on the number of colors: 0 -- 137 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:51 2012 Optimize a model with 33661 rows, 9809 columns and 109888 nonzeros Presolve time: 0.15s Presolved: 33661 rows, 9809 columns, 109888 nonzeros Variable types: 0 continuous, 9809 integer (9809 binary) Root relaxation: objective 0.000000e+00, 409 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 (409 simplex iterations) in 0.18 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 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:52 2012 Optimize a model with 16899 rows, 5151 columns and 54944 nonzeros Presolve time: 0.08s Presolved: 16899 rows, 5151 columns, 54944 nonzeros Variable types: 0 continuous, 5151 integer (5151 binary) Root relaxation: objective 0.000000e+00, 377 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 (657 simplex iterations) in 0.12 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:52 2012 Optimize a model with 8518 rows, 2822 columns and 27472 nonzeros Presolve time: 0.03s Presolved: 8518 rows, 2822 columns, 27472 nonzeros Variable types: 0 continuous, 2822 integer (2822 binary) Root relaxation: objective 0.000000e+00, 281 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 (500 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:52 2012 Optimize a model with 4081 rows, 1589 columns and 12928 nonzeros Presolve time: 0.01s Presolved: 4081 rows, 1589 columns, 12928 nonzeros Variable types: 0 continuous, 1589 integer (1589 binary) Root relaxation: objective 0.000000e+00, 301 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 (533 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 18:37:52 2012 Optimize a model with 2109 rows, 1041 columns and 6464 nonzeros Presolve time: 0.01s Presolved: 2109 rows, 1041 columns, 6464 nonzeros Variable types: 0 continuous, 1041 integer (1041 binary) Root relaxation: objective 0.000000e+00, 331 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 0 239 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2188 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:52 2012 Optimize a model with 1123 rows, 767 columns and 3232 nonzeros Presolve removed 137 rows and 137 columns Presolve time: 0.00s Presolved: 986 rows, 630 columns, 2958 nonzeros Variable types: 0 continuous, 630 integer (630 binary) Root relaxation: objective 0.000000e+00, 149 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 0 137 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (579 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 18:37:53 2012 Optimize a model with 1616 rows, 904 columns and 4848 nonzeros Presolve time: 0.00s Presolved: 1616 rows, 904 columns, 4848 nonzeros Variable types: 0 continuous, 904 integer (904 binary) Root relaxation: objective 0.000000e+00, 313 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 0 264 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 0s 0 0 0.00000 0 360 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 368 - 0.00000 - - 1s 0 0 0.00000 0 307 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 2 0.00000 0 308 - 0.00000 - - 1s Cutting planes: Zero half: 28 Explored 3 nodes (16065 simplex iterations) in 1.67 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