current bounds on the number of colors: 0 -- 74 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:02 2012 Optimize a model with 5735 rows, 2891 columns and 19721 nonzeros Presolve removed 1 rows and 37 columns Presolve time: 0.03s Presolved: 5734 rows, 2854 columns, 19684 nonzeros Variable types: 0 continuous, 2854 integer (2854 binary) Root relaxation: objective 0.000000e+00, 169 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 (169 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:02 2012 Optimize a model with 2828 rows, 1485 columns and 9594 nonzeros Presolve removed 1 rows and 18 columns Presolve time: 0.01s Presolved: 2827 rows, 1467 columns, 9576 nonzeros Variable types: 0 continuous, 1467 integer (1467 binary) Root relaxation: objective 0.000000e+00, 173 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 (297 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:02 2012 Optimize a model with 1451 rows, 819 columns and 4797 nonzeros Presolve removed 1 rows and 9 columns Presolve time: 0.00s Presolved: 1450 rows, 810 columns, 4788 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Root relaxation: objective 0.000000e+00, 171 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 (281 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 Fri Dec 14 18:21:02 2012 Optimize a model with 686 rows, 449 columns and 2132 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 685 rows, 445 columns, 2128 nonzeros Variable types: 0 continuous, 445 integer (445 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 (175 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 Fri Dec 14 18:21:02 2012 Optimize a model with 380 rows, 301 columns and 1066 nonzeros Presolve removed 74 rows and 75 columns Presolve time: 0.00s Presolved: 306 rows, 226 columns, 918 nonzeros Variable types: 0 continuous, 226 integer (226 binary) Root relaxation: objective 0.000000e+00, 82 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 73 - 0.00000 - - 0s Explored 0 nodes (287 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 Fri Dec 14 18:21:02 2012 Optimize a model with 533 rows, 375 columns and 1599 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 532 rows, 372 columns, 1596 nonzeros Variable types: 0 continuous, 372 integer (372 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 0.00000 0 124 - 0.00000 - - 0s 0 0 0.00000 0 104 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 108 - 0.00000 - - 0s 0 0 0.00000 0 95 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 96 - 0.00000 - - 0s 0 0 0.00000 0 117 - 0.00000 - - 0s 0 0 0.00000 0 110 - 0.00000 - - 0s 0 0 0.00000 0 105 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 2 0.00000 0 118 - 0.00000 - - 0s Cutting planes: Zero half: 8 Explored 7 nodes (4562 simplex iterations) in 0.20 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