current bounds on the number of colors: 0 -- 81 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:40 2012 Optimize a model with 6161 rows, 3392 columns and 21480 nonzeros Presolve removed 3 rows and 120 columns Presolve time: 0.04s Presolved: 6158 rows, 3272 columns, 21360 nonzeros Variable types: 0 continuous, 3272 integer (3272 binary) Root relaxation: objective 0.000000e+00, 175 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 (268 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:40 2012 Optimize a model with 3121 rows, 1772 columns and 10740 nonzeros Presolve removed 3 rows and 60 columns Presolve time: 0.01s Presolved: 3118 rows, 1712 columns, 10680 nonzeros Variable types: 0 continuous, 1712 integer (1712 binary) Root relaxation: objective 0.000000e+00, 166 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 (166 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:40 2012 Optimize a model with 1601 rows, 962 columns and 5370 nonzeros Presolve removed 3 rows and 30 columns Presolve time: 0.01s Presolved: 1598 rows, 932 columns, 5340 nonzeros Variable types: 0 continuous, 932 integer (932 binary) Root relaxation: objective 0.000000e+00, 168 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 (271 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 Fri Dec 14 18:21:41 2012 Optimize a model with 841 rows, 557 columns and 2685 nonzeros Presolve removed 3 rows and 15 columns Presolve time: 0.00s Presolved: 838 rows, 542 columns, 2670 nonzeros Variable types: 0 continuous, 542 integer (542 binary) Root relaxation: objective 0.000000e+00, 183 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 (283 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:41 2012 Optimize a model with 385 rows, 314 columns and 1074 nonzeros Presolve removed 81 rows and 84 columns Presolve time: 0.00s Presolved: 304 rows, 230 columns, 912 nonzeros Variable types: 0 continuous, 230 integer (230 binary) Root relaxation: objective 0.000000e+00, 86 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 78 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (312 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 Fri Dec 14 18:21:41 2012 Optimize a model with 537 rows, 395 columns and 1611 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 534 rows, 386 columns, 1602 nonzeros Variable types: 0 continuous, 386 integer (386 binary) Root relaxation: objective 0.000000e+00, 177 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 0 122 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (519 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% optimal solution found: number of colors: 3