 25 Sep, 2017 3 commits


Robbert Krebbers authored
This problem has been reported by Léon Gondelman. Before, when using, for example wp_alloc, in an expression like: ref (ref v) It would apply `tac_wp_alloc` to the outermost ref, after which it fails to establish that the argument `ref v` is a value. In this commit, other evaluation positions will be tried whenever it turn out that the argument of the construct is not a value. The same applies to store/cas/... I have implemented this by making use of the new `IntoVal` class.

Dan Frumin authored

Dan Frumin authored
Instead of writing a separate tactic lemma for each pure reduction, there is a single tactic lemma for performing all of them. The instances of PureExec can be shared between WP tactics and, e.g. symbolic execution in the ghost threadpool

 05 Jan, 2017 1 commit


Ralf Jung authored

 03 Jan, 2017 1 commit


Ralf Jung authored
This patch was created using find name *.v  xargs L 1 awk i inplace '{from = 0} /^From/{ from = 1; ever_from = 1} { if (from == 0 && seen == 0 && ever_from == 1) { print "Set Default Proof Using \"Type*\"."; seen = 1 } }1 ' and some minor manual editing

 09 Dec, 2016 3 commits


Ralf Jung authored

Robbert Krebbers authored

Robbert Krebbers authored
The WP construction now takes an invariant on states as a parameter (part of the irisG class) and no longer builds in the authoritative ownership of the entire state. When instantiating WP with a concrete language on can choose its state invariant. For example, for heap_lang we directly use `auth (gmap loc (frac * dec_agree val))`, and avoid the indirection through invariants entirely. As a result, we no longer have to carry `heap_ctx` around.

 08 Dec, 2016 1 commit


Ralf Jung authored

 24 Nov, 2016 1 commit


JacquesHenri Jourdan authored
The idea on magic wand is to use it for curried lemmas and use ⊢ for uncurried lemmas.

 22 Nov, 2016 2 commits


Robbert Krebbers authored
We do this by introducing a type class UpClose with notation ↑. The reason for this change is as follows: since `nclose : namespace → coPset` is declared as a coercion, the notation `nclose N ⊆ E` was pretty printed as `N ⊆ E`. However, `N ⊆ E` could not be typechecked because type checking goes from left to right, and as such would look for an instance `SubsetEq namespace`, which causes the right hand side to be illtyped.

Ralf Jung authored

 01 Nov, 2016 1 commit


Ralf Jung authored
Now we try to avoid adding them unnecessarily, so we don't have to remove them automatically any more.

 28 Oct, 2016 1 commit


Robbert Krebbers authored

 25 Oct, 2016 1 commit


Robbert Krebbers authored
And also rename the corresponding proof mode tactics.

 12 Oct, 2016 1 commit


Ralf Jung authored
rename program_logic.{ownership > wsat}. It really is about world satisfaction and invariants more than about ownership.

 27 Sep, 2016 1 commit


Robbert Krebbers authored
As proposed by JH Jourdan in issue 34.

 23 Aug, 2016 1 commit


Robbert Krebbers authored

 22 Aug, 2016 1 commit


Robbert Krebbers authored
This is more consistent with CAS, which also can be used on any value. Note that being able to (atomically) test for equality of any value and being able to CAS on any value is not realistic. See the discussion at https://gitlab.mpisws.org/FP/iriscoq/issues/26, and in particular JH Jourdan's observation: I think indeed for heap_lang this is just too complicated. Anyway, the role of heap_lang is not to model any actual programming language, but rather to show that we can do proofs about certain programs. The fact that you can write unrealistic programs is not a problem, IMHO. The only thing which is important is that the program that we write are realistic (i.e., faithfully represents the algorithm we want to p This commit is based on a commit by Zhen Zhang who generalized equality to work on any literal (and not just integers).

 08 Aug, 2016 2 commits


Robbert Krebbers authored
This generalization is surprisingly easy in Iris 3.0, so I could not resist not doing it :).

Robbert Krebbers authored
This makes stuff more uniform and also removes the need for the [inGFs] type class. Instead, there is now a type class [subG Σ1 Σ2] which expresses that a list of functors [Σ1] is contained in [Σ2].

 05 Aug, 2016 3 commits


Robbert Krebbers authored
Use it to prove that tests/barrier_client and tests/heap_lang are adequate.

Robbert Krebbers authored

Robbert Krebbers authored
This commit features:  A simpler model. The recursive domain equation no longer involves a triple containing invariants, physical state and ghost state, but just ghost state. Invariants and physical state are encoded using (higherorder) ghost state.  (Primitive) view shifts are formalized in the logic and all properties about it are proven in the logic instead of the model. Instead, the core logic features only a notion of raw view shifts which internalizing performing frame preserving updates.  A better behaved notion of mask changing view shifts. In particular, we no longer have sideconditions on transitivity of view shifts, and we have a rule for introduction of mask changing view shifts ={E1,E2}=> P with E2 ⊆ E1 which allows to postpone performing a view shift.  The weakest precondition connective is formalized in the logic using Banach's fixpoint. All properties about the connective are proven in the logic instead of directly in the model.  Adequacy is proven in the logic and uses a primitive form of adequacy for uPred that only involves raw views shifts and laters. Some remarks:  I have removed binary view shifts. I did not see a way to describe all rules of the new mask changing view shifts using those.  There is no longer the need for the notion of "frame shifting assertions" and these are thus removed. The rules for Hoare triples are thus also stated in terms of primitive view shifts. TODO:  Maybe rename primitive view shift into something more sensible  Figure out a way to deal with closed proofs (see the commented out stuff in tests/heap_lang and tests/barrier_client).

 19 Jul, 2016 1 commit


Robbert Krebbers authored

 15 Jul, 2016 1 commit


Robbert Krebbers authored

 13 Jul, 2016 1 commit


Robbert Krebbers authored
The intropattern {H} also meant clear (both in ssreflect, and the logic part of the introduction pattern).

 23 Jun, 2016 1 commit


Robbert Krebbers authored

 17 Jun, 2016 1 commit


Robbert Krebbers authored
Fixes issue #20.

 24 May, 2016 1 commit


Robbert Krebbers authored
Changes:  We no longer have a different syntax for specializing a term H : P ★ Q whose range P or domain Q is persistent. There is just one syntax, and the system automatically determines whether either P or Q is persistent.  While specializing a term, always modalities are automatically stripped. This gets rid of the specialization pattern !.  Make the syntax of specialization patterns more consistent. The syntax for generating a goal is [goal_spec] where goal_spec is one of the following: H1 .. Hn : generate a goal using hypotheses H1 .. Hn H1 .. Hn : generate a goal using all hypotheses but H1 .. Hn # : generate a goal for the premise in which all hypotheses can be used. This is only allowed when specializing H : P ★ Q where either P or Q is persistent. % : generate a goal for a pure premise.

 10 May, 2016 1 commit


Robbert Krebbers authored
And make constants P for which we do not want of_val P to reduce Opaque.

 02 May, 2016 1 commit


Robbert Krebbers authored
iSpecialize and iDestruct. These tactics now all take an iTrm, which is a tuple consisting of a.) a lemma or name of a hypotheses b.) arguments to instantiate c.) a specialization pattern.

 26 Apr, 2016 1 commit


Robbert Krebbers authored
It is no longer triggered when posing [P ⊢ Q] with [P] an evar. This, for example, makes sure that iApply pvs_intro works, which failed before.

 19 Apr, 2016 1 commit


Robbert Krebbers authored
That way, we do not have useless type annotations of the form "v : language.val heap_lang" cluttering about any goal. Note, that we could decide to eta expand everywhere (as we do for ∀ and ∃), and use the notation "WP e {{ Q }}" for "wp e ⊤ (λ _, Q)".

 15 Apr, 2016 1 commit


Ralf Jung authored

 13 Apr, 2016 1 commit


Ralf Jung authored

 12 Apr, 2016 3 commits


Robbert Krebbers authored

Robbert Krebbers authored
This reverts commit 3cc38ff6. The reverted pure hypotheses and variables appear in the wrong order.

Robbert Krebbers authored

 11 Apr, 2016 1 commit


Robbert Krebbers authored
