current bounds on the number of colors: 0 -- 170 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:14 2012 Optimize a model with 12750 rows, 14598 columns and 52190 nonzeros Presolve removed 30 rows and 2550 columns Presolve time: 0.12s Presolved: 12720 rows, 12048 columns, 49640 nonzeros Variable types: 0 continuous, 12048 integer (12048 binary) Root relaxation: objective 0.000000e+00, 250 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 (250 simplex iterations) in 0.14 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 -- 85 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:14 2012 Optimize a model with 6386 rows, 7288 columns and 25788 nonzeros Presolve removed 30 rows and 1260 columns Presolve time: 0.05s Presolved: 6356 rows, 6028 columns, 24528 nonzeros Variable types: 0 continuous, 6028 integer (6028 binary) Root relaxation: objective 0.000000e+00, 248 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 (248 simplex iterations) in 0.06 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 -- 42 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:14 2012 Optimize a model with 3278 rows, 3718 columns and 12894 nonzeros Presolve removed 30 rows and 630 columns Presolve time: 0.02s Presolved: 3248 rows, 3088 columns, 12264 nonzeros Variable types: 0 continuous, 3088 integer (3088 binary) Root relaxation: objective 0.000000e+00, 248 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 (248 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:14 2012 Optimize a model with 1650 rows, 1848 columns and 6140 nonzeros Presolve removed 30 rows and 300 columns Presolve time: 0.01s Presolved: 1620 rows, 1548 columns, 5840 nonzeros Variable types: 0 continuous, 1548 integer (1548 binary) Root relaxation: objective 0.000000e+00, 248 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 (248 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:14 2012 Optimize a model with 910 rows, 998 columns and 3070 nonzeros Presolve removed 30 rows and 150 columns Presolve time: 0.00s Presolved: 880 rows, 848 columns, 2920 nonzeros Variable types: 0 continuous, 848 integer (848 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 0.00 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:14 2012 Optimize a model with 466 rows, 488 columns and 1228 nonzeros Presolve removed 180 rows and 215 columns Presolve time: 0.00s Presolved: 286 rows, 273 columns, 858 nonzeros Variable types: 0 continuous, 273 integer (273 binary) Root relaxation: objective 0.000000e+00, 140 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 0 115 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (454 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:14 2012 Optimize a model with 614 rows, 658 columns and 1842 nonzeros Presolve removed 30 rows and 90 columns Presolve time: 0.00s Presolved: 584 rows, 568 columns, 1752 nonzeros Variable types: 0 continuous, 568 integer (568 binary) Root relaxation: objective 0.000000e+00, 238 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 (238 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