[Coin-discuss] testit ./miplib3/misc07.gz

[Sven de Vries]

Hi,

tried to run sample2/testit on misc07.gz (version of this morning):

testit ./miplib3/misc07.gz
Coin0001I At line 15 NAME          MISC07
Coin0001I At line 16 ROWS
Coin0001I At line 230 COLUMNS
Coin0001I At line 4616 RHS
Coin0001I At line 4708 BOUNDS
Coin0001I At line 4969 ENDATA
Coin0002I Problem MISC07 has 212 rows, 260 columns and 8619 elements
Coin0008I MISC07 read with 0 errors
Mon Dec  1 13:59:46 MET 2003
Sbb0013I At root node, 10 cuts changed objective from 1415 to 1450 in 100
passes
Sbb0014I Cut generator 0 (Probing) - 0 row cuts (0 active), 0 column cuts
- new frequency is 10
Sbb0014I Cut generator 1 (Gomory) - 3635 row cuts (10 active), 0 column
cuts - new frequency is 1
Sbb0014I Cut generator 2 (Knapsack) - 0 row cuts (0 active), 0 column cuts
- new frequency is 100
Sbb0014I Cut generator 3 (OddHole) - 0 row cuts (0 active), 0 column cuts
- new frequency is 100
Sbb0010I After 0 nodes, 1 on tree, 1e+50 best solution, best possible 1450
Sbb0004I Integer solution of 3170 found after 4844 iterations and 11 nodes
Sbb0016I Integer solution of 3140 found by strong branching after 9837
iterations and 22 nodes
Sbb0016I Integer solution of 2810 found by strong branching after 10678
iterations and 27 nodes
Sbb0010I After 1000 nodes, 82 on tree, 2810 best solution, best possible
1822.02
Mon Dec  1 14:20:04 MET 2003
Sbb0010I After 2000 nodes, 79 on tree, 2810 best solution, best possible
1822.02
Sbb0010I After 3000 nodes, 80 on tree, 2810 best solution, best possible
2165.06
Mon Dec  1 15:40:58 MET 2003
Mon Dec  1 17:03:33 MET 2003


(pasted a couple dates/times into the log, so that you see progress)

initially some progress, but
after three-thousand nodes nothing new seems to happen.

could it be that some cycling occurs?

btw: this happens on sunos 5.8 (but not macosx).

does someone observe teh same?

greetings!
sven