Parsing and infrastructure support for SMT-LIBv2.5 input and output languages.

* support for new commands meta-info, declare-const, echo, get-model,
  reset, and reset-assertions
* support for set-option :global-declarations
* support for set-option :produce-assertions
* support for set-option :reproducible-resource-limit
* support for get-info :assertion-stack-levels
* support for set-info :smt-lib-version 2.5
* ascribe types for abstract values (the new 2.5 standard clarifies that
  this is required)
* SMT-LIB v2.5 string literals (we still support 2.0 string literals when
  in 2.0 mode)

What's still to do:
* check-sat-assumptions/get-unsat-assumptions (still being hotly debated).
  Also set-option :produce-unsat-assumptions.
* define-fun-rec doesn't allow mutual recursion
* All options should be restored to defaults with (reset) command.
  (Currently :incremental and maybe others get "stuck" due to late driver
  integration.)

10 files changed, 79 insertions, 3 deletions

diff --git a/test/regress/regress0/bug421.smt2 b/test/regress/regress0/bug421.smt2
index 5a5886940..fd7b4a7cc 100644
--- a/test/regress/regress0/bug421.smt2
+++ b/test/regress/regress0/bug421.smt2
@@ -1,6 +1,6 @@
 ; COMMAND-LINE: --incremental --abstract-values
 ; EXPECT: sat
-; EXPECT: ((a @1) (b @2))
+; EXPECT: ((a (as @1 (Array Int Int))) (b (as @2 (Array Int Int))))
 (set-logic QF_AUFLIA)
 (set-option :produce-models true)
 (declare-fun a () (Array Int Int))
diff --git a/test/regress/regress0/bug421b.smt2 b/test/regress/regress0/bug421b.smt2
index 82f566a64..aed7f7c05 100644
--- a/test/regress/regress0/bug421b.smt2
+++ b/test/regress/regress0/bug421b.smt2
@@ -4,7 +4,7 @@
 ;
 ; COMMAND-LINE: --incremental --abstract-values --check-models
 ; EXPECT: sat
-; EXPECT: ((a @1) (b @2))
+; EXPECT: ((a (as @1 (Array Int Int))) (b (as @2 (Array Int Int))))
 (set-logic QF_AUFLIA)
 (set-option :produce-models true)
 (declare-fun a () (Array Int Int))
diff --git a/test/regress/regress0/bug590.smt2 b/test/regress/regress0/bug590.smt2
index d5bd7fd56..06dc1fe58 100644
--- a/test/regress/regress0/bug590.smt2
+++ b/test/regress/regress0/bug590.smt2
@@ -1,6 +1,7 @@
 (set-logic QF_ALL_SUPPORTED)
 (set-option :strings-exp true)
 (set-option :produce-models true)
+(set-info :smt-lib-version 2.0)
 (set-info :status sat)
 
 (declare-fun text () String)
diff --git a/test/regress/regress0/crash_burn_locusts.smt2 b/test/regress/regress0/crash_burn_locusts.smt2
new file mode 100644
index 000000000..313d6f79c
--- /dev/null
+++ b/test/regress/regress0/crash_burn_locusts.smt2
@@ -0,0 +1,29 @@
+;; This is a nasty parsing test for define-fun-rec
+
+(set-logic UFLIRA)
+(set-info :smt-lib-version 2.5)
+(define-fun-rec (
+   (f ((x Int)) Int 5) ;; ok, f : Int -> Int
+   (g ((x Int)) Int (h 4)) ;;  um, ok, so g : Int -> Int and h : Int -> Int?
+   (h ((x Real)) Int 4)   ;; oops no we were wrong, **CRASH**
+))
+
+(reset)
+
+(set-logic UFLIRA)
+(set-info :smt-lib-version 2.5)
+(define-fun-rec (
+   (f ((x Int)) Int (g (h 4) 5)) ;; ok, f : Int -> Int and g : Int -> X -> Int and h : Int -> X ??!  What the F?! (pun intended)
+   (g ((x Int)) Int 5) ;; wait, now g has wrong arity?!!  **BURN**
+   (h ((x Int)) Int 2)
+))
+
+(reset)
+
+(set-logic UFLIRA)
+(set-info :smt-lib-version 2.5)
+(declare-const g Int 2)
+(define-fun-rec (
+  (f () Int g)  ;; wait, which g does this refer to?!  **LOCUSTS**
+  (g () Int 5)
+))
diff --git a/test/regress/regress0/parser/Makefile.am b/test/regress/regress0/parser/Makefile.am
index 389c80e09..eb27e797b 100644
--- a/test/regress/regress0/parser/Makefile.am
+++ b/test/regress/regress0/parser/Makefile.am
@@ -19,7 +19,9 @@ MAKEFLAGS = -k
 # If a test shouldn't be run in e.g. competition mode,
 # put it below in "TESTS +="
 TESTS =	\
-	declarefun-emptyset-uf.smt2
+	declarefun-emptyset-uf.smt2 \
+	strings20.smt2 \
+	strings25.smt2
 
 EXTRA_DIST = $(TESTS)
 
diff --git a/test/regress/regress0/parser/strings20.smt2 b/test/regress/regress0/parser/strings20.smt2
new file mode 100644
index 000000000..6e9ea4434
--- /dev/null
+++ b/test/regress/regress0/parser/strings20.smt2
@@ -0,0 +1,15 @@
+; EXPECT: sat
+; EXPECT: (model
+; EXPECT: (define-fun s () String "\"")
+; EXPECT: )
+
+(set-logic QF_S)
+(set-info :smt-lib-version 2.0)
+(set-option :produce-models true)
+
+(declare-fun s () String)
+
+(assert (= s "\""))
+
+(check-sat)
+(get-model)
diff --git a/test/regress/regress0/parser/strings25.smt2 b/test/regress/regress0/parser/strings25.smt2
new file mode 100644
index 000000000..90602e67d
--- /dev/null
+++ b/test/regress/regress0/parser/strings25.smt2
@@ -0,0 +1,15 @@
+; EXPECT: sat
+; EXPECT: (model
+; EXPECT: (define-fun s () String """")
+; EXPECT: )
+
+(set-logic QF_S)
+(set-info :smt-lib-version 2.5)
+(set-option :produce-models true)
+
+(declare-fun s () String)
+
+(assert (= s """"))
+
+(check-sat)
+(get-model)
diff --git a/test/regress/regress0/strings/Makefile.am b/test/regress/regress0/strings/Makefile.am
index 233962d72..bd8e9ea93 100644
--- a/test/regress/regress0/strings/Makefile.am
+++ b/test/regress/regress0/strings/Makefile.am
@@ -23,6 +23,7 @@ TESTS =	\
   bug001.smt2 \
   cardinality.smt2 \
   escchar.smt2 \
+  escchar_25.smt2 \
   str001.smt2 \
   str002.smt2 \
   str003.smt2 \
diff --git a/test/regress/regress0/strings/escchar.smt2 b/test/regress/regress0/strings/escchar.smt2
index 508d7f3c1..aa2afb7e4 100644
--- a/test/regress/regress0/strings/escchar.smt2
+++ b/test/regress/regress0/strings/escchar.smt2
@@ -1,5 +1,6 @@
 (set-logic QF_S)

 (set-info :status sat)

+(set-info :smt-lib-version 2.0)

 

 (declare-fun x () String)

 (declare-const I Int)

diff --git a/test/regress/regress0/strings/escchar_25.smt2 b/test/regress/regress0/strings/escchar_25.smt2
new file mode 100644
index 000000000..f48995344
--- /dev/null
+++ b/test/regress/regress0/strings/escchar_25.smt2
@@ -0,0 +1,12 @@
+(set-logic QF_S)

+(set-info :status sat)

+(set-info :smt-lib-version 2.5)

+

+(declare-fun x () String)

+(declare-const I Int)

+

+(assert (= x "\0\1\2\3\04\005\x06\7\8\9ABC\\""\t\a\b"))

+(assert (= I (str.len x)))

+

+

+(check-sat)