current bounds on the number of colors: 0 -- 155 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:40 2012 Optimize a model with 10088 rows, 12064 columns and 41734 nonzeros Presolve removed 27 rows and 2079 columns Presolve time: 0.11s Presolved: 10061 rows, 9985 columns, 39655 nonzeros Variable types: 0 continuous, 9985 integer (9985 binary) Root relaxation: objective 0.000000e+00, 223 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 (223 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 -- 77 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:40 2012 Optimize a model with 5057 rows, 6019 columns and 20596 nonzeros Presolve removed 27 rows and 1026 columns Presolve time: 0.04s Presolved: 5030 rows, 4993 columns, 19570 nonzeros Variable types: 0 continuous, 4993 integer (4993 binary) Root relaxation: objective 0.000000e+00, 221 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 (221 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 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:40 2012 Optimize a model with 2606 rows, 3074 columns and 10298 nonzeros Presolve removed 27 rows and 513 columns Presolve time: 0.01s Presolved: 2579 rows, 2561 columns, 9785 nonzeros Variable types: 0 continuous, 2561 integer (2561 binary) Root relaxation: objective 0.000000e+00, 223 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 (223 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 16:20:40 2012 Optimize a model with 1316 rows, 1524 columns and 4878 nonzeros Presolve removed 27 rows and 243 columns Presolve time: 0.01s Presolved: 1289 rows, 1281 columns, 4635 nonzeros Variable types: 0 continuous, 1281 integer (1281 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 0.01 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 16:20:40 2012 Optimize a model with 671 rows, 749 columns and 2168 nonzeros Presolve removed 27 rows and 108 columns Presolve time: 0.00s Presolved: 644 rows, 641 columns, 2060 nonzeros Variable types: 0 continuous, 641 integer (641 binary) Root relaxation: objective 0.000000e+00, 202 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 (202 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 16:20:40 2012 Optimize a model with 413 rows, 439 columns and 1084 nonzeros Presolve removed 165 rows and 197 columns Presolve time: 0.00s Presolved: 248 rows, 242 columns, 744 nonzeros Variable types: 0 continuous, 242 integer (242 binary) Root relaxation: objective 0.000000e+00, 132 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 0 109 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (408 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 16:20:40 2012 Optimize a model with 542 rows, 594 columns and 1626 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 515 rows, 513 columns, 1545 nonzeros Variable types: 0 continuous, 513 integer (513 binary) Root relaxation: objective 0.000000e+00, 191 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 (191 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