z3-src 503.2.0

Source distribution of the Z3 SMT solver, for use as a build dependency
Documentation 
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/*++
Copyright (c) 2022 Microsoft Corporation

Module Name:

    push_ite.h

Author:

    Nikolaj Bjorner (nbjorner) 2022-11-24

--*/

#pragma once

#include "ast/simplifiers/dependent_expr_state.h"
#include "ast/rewriter/push_app_ite.h"


class push_ite_simplifier : public dependent_expr_simplifier {
    push_app_ite_rw m_push;
    
public:
    push_ite_simplifier(ast_manager& m, params_ref const& p, dependent_expr_state& fmls, bool c):
        dependent_expr_simplifier(m, fmls),
        m_push(m) {
        m_push.set_conservative(c);
    }

    char const* name() const override { return "push-app-ite"; }
        
    void reduce() override {
        expr_ref r(m);
        for (unsigned idx : indices()) {
            auto const& d = m_fmls[idx];
            m_push(d.fml(), r);
            if (r != d.fml())
                m_fmls.update(idx, dependent_expr(m, r, nullptr, d.dep()));
        }
    }
};


class ng_push_ite_simplifier : public dependent_expr_simplifier {
    ng_push_app_ite_rw m_push;
    
public:
    ng_push_ite_simplifier(ast_manager& m, params_ref const& p, dependent_expr_state& fmls, bool c):
        dependent_expr_simplifier(m, fmls),
        m_push(m) {
        m_push.set_conservative(c);
    }

    char const* name() const override { return "ng-push-app-ite"; }
        
    void reduce() override {
        expr_ref r(m);
        for (unsigned idx : indices()) {
            auto const& d = m_fmls[idx];
            m_push(d.fml(), r);
            m_fmls.update(idx, dependent_expr(m, r, nullptr, d.dep()));
        }
    }
};

Z3_ADD_SIMPLIFIER(push_app_ite_conservative, "push-app-ite-conservative", "Push functions over if-then else.", alloc(push_ite_simplifier, m, p, s, true));
Z3_ADD_SIMPLIFIER(push_app_ite, "push-app-ite", "Push functions over if-then else.", alloc(push_ite_simplifier, m, p, s, false));
Z3_ADD_SIMPLIFIER(ng_push_app_ite_conservative, "ng-push-app-ite-conservative", "Push functions over if-then-else within non-ground terms only.", alloc(ng_push_ite_simplifier, m, p, s, true));
Z3_ADD_SIMPLIFIER(ng_push_app_ite, "ng-push-app-ite", "Push functions over if-then-else within non-ground terms only.", alloc(ng_push_ite_simplifier, m, p, s, false));