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used to contain the proofs of src/util/{vector,pqueue}.ml
this is now part of the VOCaL library
see https://github.com/vocal-project/vocal/

Merge branch '450-wrong-smtlib-file-generation-for-ieee_float-floatxx-in_range-at-least-for-cvc4' into 'master'

Resolve "Wrong smtlib file generation for ieee_float.FloatXX.in_range (at least) for CVC4"

Closes #450

See merge request !331

We prefer to keep specific recent lemmas rather than generic
early axioms.

It is replayed in bisect_end.

These declarations have no logical content.

Adapted to Isabelle2019

See merge request !330

why3 accepts long path as socket name

See merge request !329

Unix sockets have the restriction that the path to the socket must be
quite short (100 chars give or take depending on exact OS). We can
workaround this limitation by chdir'ing to the dirname of the socket
first. This was already done in the server, but not in the client.

Change-Id: I798654c277ee2d623607179a41faa7cf0d8f2837

Wmpz_init

See merge request !325

* annotate with proper types

* fix obviously wrong comment

When ocamlfind is used for linking, the resulting plugin requires the
dynamic loading of graph.cmxs. See also #453.

Note that, until commit 2a9becdb, an empty useless plugin was created, thus
hiding the issue.

For some reason (bug in make?), plugins were not recompiled when their
sources were modified. Not casting a wide net over several directories
seem to improve the situation.

Robust bisect

See merge request !322

Enable debug flags twice, so that they are also available during configuration.

See merge request !328