bench test error Alt-Ergo lib/structures/expr.ml 2

[felixL-K]

Nummber of tests : 4
Tests: 1165, 403, 430, 570
Error:
owi: internal error, uncaught exception:
File "src/lib/structures/expr.ml", line 915, characters 4-10: Assertion failed
Raised at Stdlib__Domain.join in file "domain.ml", line 258, characters 16-24
Called from Stdlib__Array.iter in file "array.ml", line 92, characters 31-48
Called from Owi__Wq.read_as_seq in file "src/data_structures/wq.ml", line 17, characters 4-16
Called from Owi__Cmd_sym.print_and_count_failures.aux in file "src/cmd/cmd_sym.ml", line 133, characters 10-20
Called from Owi__Cmd_sym.handle_result in file "src/cmd/cmd_sym.ml", line 199, characters 4-190
Called from Cmdliner_term.app.(fun) in file "cmdliner_term.ml", line 24, characters 19-24
Called from Cmdliner_eval.run_parser in file "cmdliner_eval.ml", line 35, characters 37-44

[zapashcanon]

alt-ergo or mappings bugs?