Pr (#7654)

* add prd

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* missing text

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #7647

* fix #7647 - with respect to scope level

* initial stab at randomizer

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Create prd.yml

* missing text

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Update prd.yml

* allows setting simplifier factory independently of whether solver has been allocated.

Instances, such as #7484 can be solved faster by either having authors rewrite benchmarks or by using incremental pre-processing. You can add incremental pre-processing to the SMT solver by using the command

```
(set-simplifier (then simplify propagate-values solve-eqs elim-unconstrained simplify))
```

This command can be invoked any time prior to push or adding assertions.

The effect of the command is that it adds an incremental pre-processing pass to check-sat invocations that is potentially more powerful than the default pre-processing. The default pre-processing functionality is not touched mainly to avoid instability against functionality that is already built around its behavior.

* remove experiment from pr

---------

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/cmd_context/simplifier_cmds.cpp

@@ -156,7 +156,8 @@ public:
         auto simplifier_factory = sexpr2simplifier(ctx, m_simplifier);
         ctx.init_manager();
         auto* s = ctx.get_solver();
-        if (!s)
+        ctx.set_simplifier_factory(simplifier_factory);
+        if (!s) 
             return;
         if (s->get_num_assertions() > 0) 
             throw cmd_exception("set-simplifier cannot be invoked if there are already assertions");