current bounds on the number of colors: 0 -- 153 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:22 2012 Optimize a model with 9729 rows, 11754 columns and 40356 nonzeros Presolve removed 35 rows and 2660 columns Presolve time: 0.11s Presolved: 9694 rows, 9094 columns, 37696 nonzeros Variable types: 0 continuous, 9094 integer (9094 binary) Root relaxation: objective 0.000000e+00, 213 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 (213 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 -- 76 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:22 2012 Optimize a model with 4941 rows, 5940 columns and 20178 nonzeros Presolve removed 35 rows and 1330 columns Presolve time: 0.04s Presolved: 4906 rows, 4610 columns, 18848 nonzeros Variable types: 0 continuous, 4610 integer (4610 binary) Root relaxation: objective 0.000000e+00, 212 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 (212 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 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:22 2012 Optimize a model with 2547 rows, 3033 columns and 10089 nonzeros Presolve removed 35 rows and 665 columns Presolve time: 0.01s Presolved: 2512 rows, 2368 columns, 9424 nonzeros Variable types: 0 continuous, 2368 integer (2368 binary) Root relaxation: objective 0.000000e+00, 211 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 (211 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 Sat Dec 15 16:20:22 2012 Optimize a model with 1287 rows, 1503 columns and 4779 nonzeros Presolve removed 35 rows and 315 columns Presolve time: 0.01s Presolved: 1252 rows, 1188 columns, 4464 nonzeros Variable types: 0 continuous, 1188 integer (1188 binary) Root relaxation: objective 0.000000e+00, 204 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 (204 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 Sat Dec 15 16:20:22 2012 Optimize a model with 657 rows, 738 columns and 2124 nonzeros Presolve removed 35 rows and 140 columns Presolve time: 0.00s Presolved: 622 rows, 598 columns, 1984 nonzeros Variable types: 0 continuous, 598 integer (598 binary) Root relaxation: objective 0.000000e+00, 178 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 (178 simplex iterations) in 0.00 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 Sat Dec 15 16:20:22 2012 Optimize a model with 405 rows, 432 columns and 1062 nonzeros Presolve removed 157 rows and 194 columns Presolve time: 0.00s Presolved: 248 rows, 238 columns, 744 nonzeros Variable types: 0 continuous, 238 integer (238 binary) Root relaxation: objective 0.000000e+00, 125 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 0 100 - 0.00000 - - 0s Explored 0 nodes (391 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 Sat Dec 15 16:20:22 2012 Optimize a model with 531 rows, 585 columns and 1593 nonzeros Presolve removed 35 rows and 105 columns Presolve time: 0.00s Presolved: 496 rows, 480 columns, 1488 nonzeros Variable types: 0 continuous, 480 integer (480 binary) Root relaxation: objective 0.000000e+00, 182 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 (182 simplex iterations) in 0.00 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% optimal solution found: number of colors: 3