http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50439
--- Comment #1 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2012-04-05 16:47:32 UTC --- I verified that the looping occurs inside the PPL library, on a call to ppl_PIP_Problem_is_satisfiable. I used ppl_PIP_Problem_ascii_dump to examine the "pip" variable passed into that routine: external_space_dim: 32 internal_space_dim: 0 input_cs( 38 ) size 33 0 0 162 0 1 0 9 0 1620 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 f -RPI_V -RPI -NNC_V -NNC size 33 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 162 0 1 0 9 0 1620 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 162 0 1 0 9 0 1620 0 0 0 0 0 0 -162 0 -1 0 -9 0 0 0 0 0 0 -1620 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 -1 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 162 0 1 0 9 0 1620 0 0 0 0 0 0 -162 0 -1 0 -9 0 -1620 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 1 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 1 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 1 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 1 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V -RPI -NNC_V -NNC size 33 -1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 6480 0 -162 0 -1 0 -9 0 -1620 0 0 0 0 0 0 162 0 1 0 9 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 9 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 8 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 17 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC size 33 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f -RPI_V +RPI -NNC_V -NNC first_pending_constraint: 0 status: PARTIALLY_SATISFIABLE parameters variables( 0 ) initial_context 0 x 0 control_parameters CUTTING_STRATEGY_FIRST PIVOT_ROW_STRATEGY_FIRST big_parameter_dimension: 18446744073709551615 current_solution: BOTTOM It appears we'll need to report this to the PPL folks. I'll get an account over there and point them to this PR.
