From 596fe8c79106dd9b7764df2ddce6b2d3344fea34 Mon Sep 17 00:00:00 2001 From: Haniel Barbosa Date: Wed, 20 Nov 2019 16:42:58 -0300 Subject: Lazy evaluation via rec-funs of ITE expressions (#3482) --- test/regress/CMakeLists.txt | 2 + test/regress/regress1/sygus/rec-fun-while-1.sy | 92 +++++++++++++++++++++++++ test/regress/regress1/sygus/rec-fun-while-2.sy | 93 ++++++++++++++++++++++++++ 3 files changed, 187 insertions(+) create mode 100644 test/regress/regress1/sygus/rec-fun-while-1.sy create mode 100644 test/regress/regress1/sygus/rec-fun-while-2.sy (limited to 'test') diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt index 3c060a304..d810aa5be 100644 --- a/test/regress/CMakeLists.txt +++ b/test/regress/CMakeLists.txt @@ -1743,6 +1743,8 @@ set(regress_1_tests regress1/sygus/qf_abv.smt2 regress1/sygus/real-grammar.sy regress1/sygus/rec-fun-sygus.sy + regress1/sygus/rec-fun-while-1.sy + regress1/sygus/rec-fun-while-2.sy regress1/sygus/re-concat.sy regress1/sygus/repair-const-rl.sy regress1/sygus/simple-regexp.sy diff --git a/test/regress/regress1/sygus/rec-fun-while-1.sy b/test/regress/regress1/sygus/rec-fun-while-1.sy new file mode 100644 index 000000000..c175094ee --- /dev/null +++ b/test/regress/regress1/sygus/rec-fun-while-1.sy @@ -0,0 +1,92 @@ +; EXPECT: unsat +; COMMAND-LINE: --sygus-out=status --lang=sygus2 --sygus-rec-fun --no-e-matching --no-check-synth-sol + +(set-logic ALL) + +; The environment datatypes +(declare-datatype NVars ((x))) + +(declare-datatype Pair ((build (first NVars) (second Int)))) + +(declare-datatype Env ((cons (head Pair) (tail Env)) (nil))) + +(define-fun-rec envStore ((var NVars) (value Int) (env Env)) Env + (ite (is-nil env) + (cons (build var value) env) + (ite (= var (first (head env))) + (cons (build var value) (tail env)) + (cons (head env) (envStore var value (tail env))) + ) + ) + ) + +(define-fun-rec envSelect ((var NVars) (env Env)) Int + (ite (is-nil env) + 0 + (ite (= var (first (head env))) + (second (head env)) + (envSelect var (tail env)) + ) + ) + ) + +; Syntax for arithmetic expressions +(declare-datatype Aexp + ( + (Val (val Int)) + (Var (name NVars)) + (Add (addL Aexp) (addR Aexp)) + ) + ) + +; Function to evaluate arithmetic expressions +(define-fun-rec evalA ((env Env) (a Aexp)) Int + (ite (is-Val a) + (val a) + (envSelect (name a) env) + )) + +; Syntax for boolean expressions +(declare-datatype Bexp + ( + (LT (ltL Aexp) (ltR Aexp)) + ) + ) + +; Function to evaluate boolean expressions +(define-fun-rec evalB ((env Env) (b Bexp)) Bool + (< (evalA env (ltL b)) (evalA env (ltR b))) + ) + +; Syntax for commands +(declare-datatype Com + ( + (Assign (lhs NVars) (rhs Aexp)) + (While (wCond Bexp) (wCom Com)) + ) + ) + +; Function to evaluate statements +(define-fun-rec evalC ((env Env) (c Com)) Env + (ite (is-Assign c) + (envStore (lhs c) (evalA env (rhs c)) env) + (ite (evalB env (wCond c)) (evalC (evalC env (wCom c)) c) env) + ) + ) + +(synth-fun prog () Com + ((C1 Com) (C2 Com) (VX NVars) (A1 Aexp) (A2 Aexp) (B Bexp) (I Int)) + ( + (C1 Com ((While B C2))) + (C2 Com ((Assign VX A2))) + (VX NVars (x)) + (A1 Aexp ((Var VX))) + (A2 Aexp ((Val I))) + (B Bexp ((LT A1 A2))) + (I Int (0 1 (+ I I))) + ) +) + +(constraint (= (evalC (cons (build x 0) nil) prog) (cons (build x 2) nil))) + +(check-synth) diff --git a/test/regress/regress1/sygus/rec-fun-while-2.sy b/test/regress/regress1/sygus/rec-fun-while-2.sy new file mode 100644 index 000000000..87a4f2a6e --- /dev/null +++ b/test/regress/regress1/sygus/rec-fun-while-2.sy @@ -0,0 +1,93 @@ +; EXPECT: unsat +; COMMAND-LINE: --sygus-out=status --lang=sygus2 --sygus-rec-fun --no-e-matching --no-check-synth-sol + +(set-logic ALL) + +; The environment datatypes +(declare-datatype NVars ((x) (y))) + +(declare-datatype Pair ((build (first NVars) (second Int)))) + +(declare-datatype Env ((cons (head Pair) (tail Env)) (nil))) + +(define-fun-rec envStore ((var NVars) (value Int) (env Env)) Env + (ite (is-nil env) + (cons (build var value) env) + (ite (= var (first (head env))) + (cons (build var value) (tail env)) + (cons (head env) (envStore var value (tail env))) + ) + ) + ) + +(define-fun-rec envSelect ((var NVars) (env Env)) Int + (ite (is-nil env) + 0 + (ite (= var (first (head env))) + (second (head env)) + (envSelect var (tail env)) + ) + ) + ) + +; Syntax for arithmetic expressions +(declare-datatype Aexp + ( + (Val (val Int)) + (Var (name NVars)) + (Add (addL Aexp) (addR Aexp)) + (Sub (subL Aexp) (subR Aexp)) + ) + ) + +; Function to evaluate arithmetic expressions +(define-fun-rec evalA ((env Env) (a Aexp)) Int + (ite (is-Val a) + (val a) + (envSelect (name a) env) + )) + +; Syntax for boolean expressions +(declare-datatype Bexp + ( + (GTH (geqL Aexp) (geqR Aexp)) + ) + ) + +; Function to evaluate boolean expressions +(define-fun-rec evalB ((env Env) (b Bexp)) Bool + (> (evalA env (geqL b)) (evalA env (geqR b))) + ) + +; Syntax for commands +(declare-datatype Com + ( + (Assign (lhs NVars) (rhs Aexp)) + (While (wCond Bexp) (wCom Com)) + ) + ) + +; Function to evaluate statements +(define-fun-rec evalC ((env Env) (c Com)) Env + (ite (is-Assign c) + (envStore (lhs c) (evalA env (rhs c)) env) + (ite (evalB env (wCond c)) (evalC (evalC env (wCom c)) c) env) + ) + ) + +(synth-fun prog () Com + ((C1 Com) (C2 Com) (VX NVars) (A1 Aexp) (A2 Aexp) (B Bexp) (I Int)) + ( + (C1 Com ((While B C2))) + (C2 Com ((Assign VX A2))) + (VX NVars (x)) + (A1 Aexp ((Var VX))) + (A2 Aexp ((Val I))) + (B Bexp ((GTH A2 A1))) + (I Int (2)) + ) +) + +(constraint (= (evalC (cons (build x 0) nil) prog) (cons (build x 2) nil))) + +(check-synth) -- cgit v1.2.3