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###
# Bitwuzla: Satisfiability Modulo Theories (SMT) solver.
#
# Copyright (C) 2023 by the authors listed in the AUTHORS file at
# https://github.com/bitwuzla/bitwuzla/blob/main/AUTHORS
#
# This file is part of Bitwuzla under the MIT license. See COPYING for more
# information at https://github.com/bitwuzla/bitwuzla/blob/main/COPYING
##
from bitwuzla import *
if __name__ == "__main__":
# First, create a term manager instance.
tm = TermManager()
# Create a Bitwuzla options instance.
options = Options()
options.set(Option.PRODUCE_MODELS, True)
# Then, create a Bitwuzla instance.
bitwuzla = Bitwuzla(tm, options)
# Create some sorts.
bv8 = tm.mk_bv_sort(8)
bv32 = tm.mk_bv_sort(32)
fp16 = tm.mk_fp_sort(5, 11)
# Create terms.
b = tm.mk_const(tm.mk_bool_sort(), "b")
bv = tm.mk_const(bv8, "bv")
fp = tm.mk_const(fp16, "fp")
rm = tm.mk_const(tm.mk_rm_sort(), "rm")
fun = tm.mk_const(tm.mk_fun_sort([bv8, fp16, bv32], fp16), "fun")
zero = tm.mk_bv_zero(bv8)
ones = tm.mk_bv_ones(tm.mk_bv_sort(23))
z = tm.mk_var(bv8, "z")
q = tm.mk_var(bv8, "q")
lambd = tm.mk_term(Kind.LAMBDA, [z, tm.mk_term(Kind.BV_ADD, [z, bv])])
fpleq = tm.mk_term(
Kind.FP_LEQ,
[tm.mk_term(Kind.APPLY,
[fun, bv, fp, tm.mk_term(Kind.BV_ZERO_EXTEND, [ones], [9])]),
fp])
exists = tm.mk_term(
Kind.EXISTS,
[q, tm.mk_term(Kind.EQUAL, [zero, tm.mk_term(Kind.BV_MUL, [bv, q])])])
# Assert formulas.
bitwuzla.assert_formula(b)
bitwuzla.assert_formula(
tm.mk_term(Kind.EQUAL, [tm.mk_term(Kind.APPLY, [lambd, bv]), zero]))
bitwuzla.assert_formula(exists)
bitwuzla.assert_formula(fpleq)
# Print sort.
print('Print bit-vector sort of size 32:')
print('---------------------------------')
print(f'str(): {bv32}')
print()
# Print terms.
# Note: Hexadecimal bv output format is ignored if the value is not of size
# divisible by 4.
print('Print term:')
print('-----------')
print(f'str() [default]: {rm}')
print(f'str() [bin (ignored)]: {rm.str(2)}')
print(f'str() [dec (ignored)]: {rm.str(10)}')
print(f'str(16) [hex (ignored)]: {rm.str(16)}')
print()
print(f'str() [default]: {zero}')
print(f'str() [bin]: {zero.str(2)}')
print(f'str(10) [dec]: {zero.str(10)}')
print(f'str(16) [hex]: {zero.str(16)}')
print()
print(f'str() [default]: {fpleq}')
print(f'str() [bin]: {fpleq.str()}')
print(f'str(10) [dec]: {fpleq.str(10)}')
print(f'str(16) [hex (ignored)]: {fpleq.str(16)}')
print()
# Print asserted formulas.
# Note: This uses the default bit-vector output format (binary).
expected_smt2 = \
'(set-logic UFBVFP)\n' \
+ '(declare-const b Bool)\n' \
+ '(declare-const bv (_ BitVec 8))\n' \
+ '(declare-const fp (_ FloatingPoint 5 11))\n' \
+ '(declare-fun fun ((_ BitVec 8) (_ FloatingPoint 5 11) ' \
+ '(_ BitVec 32)) (_ FloatingPoint 5 11))\n' \
+ '(assert b)\n' \
+ '(assert (= ((lambda ((z (_ BitVec 8))) (bvadd z bv)) bv) ' \
+ '#b00000000))\n' \
+ '(assert (exists ((q (_ BitVec 8))) (= #b00000000 ' \
+ '(bvmul bv q))))\n' \
+ '(assert (fp.leq (fun bv fp ((_ zero_extend 9) ' \
+ '#b11111111111111111111111)) fp))\n' \
+ '(check-sat)\n' \
+ '(exit)\n'
res = bitwuzla.print_formula()
assert res == expected_smt2
print('Print formula [default (binary) bv output format]:')
print('--------------------------------------------------')
print(res)
# Print asserted formulas using hexadecimal bit-vector output format.
expected_smt2 = \
'(set-logic UFBVFP)\n' \
+ '(declare-const b Bool)\n' \
+ '(declare-const bv (_ BitVec 8))\n' \
+ '(declare-const fp (_ FloatingPoint 5 11))\n' \
+ '(declare-fun fun ((_ BitVec 8) (_ FloatingPoint 5 11) ' \
+ '(_ BitVec 32)) (_ FloatingPoint 5 11))\n' \
+ '(assert b)\n' \
+ '(assert (= ((lambda ((z (_ BitVec 8))) (bvadd z bv)) bv) ' \
+ '#x00))\n' \
+ '(assert (exists ((q (_ BitVec 8))) (= #x00 (bvmul bv q))))\n' \
+ '(assert (fp.leq (fun bv fp ((_ zero_extend 9) ' \
+ '#b11111111111111111111111)) fp))\n' \
+ '(check-sat)\n' \
+ '(exit)\n'
res = bitwuzla.print_formula("smt2", 16)
assert res == expected_smt2
print('Print formula [hexadecimal bv output format]:')
print('--------------------------------------------------')
print(res)
# Print asserted formulas using decimal bit-vector output format.
expected_smt2 = \
'(set-logic UFBVFP)\n' \
+ '(declare-const b Bool)\n' \
+ '(declare-const bv (_ BitVec 8))\n' \
+ '(declare-const fp (_ FloatingPoint 5 11))\n' \
+ '(declare-fun fun ((_ BitVec 8) (_ FloatingPoint 5 11) ' \
+ '(_ BitVec 32)) (_ FloatingPoint 5 11))\n' \
+ '(assert b)\n' \
+ '(assert (= ((lambda ((z (_ BitVec 8))) (bvadd z bv)) bv) ' \
+ '(_ bv0 8)))\n' \
+ '(assert (exists ((q (_ BitVec 8))) (= (_ bv0 8) ' \
+ '(bvmul bv q))))\n' \
+ '(assert (fp.leq (fun bv fp ((_ zero_extend 9) ' \
+ '(_ bv8388607 23))) fp))\n' \
+ '(check-sat)\n' \
+ '(exit)\n'
res = bitwuzla.print_formula("smt2", 10)
assert res == expected_smt2
print('Print formula [decimal bv output format]:')
print('---------------------------------------------')
print(res)
bitwuzla.check_sat()
# Print values.
print('Print value of Boolean predicate:')
print('---------------------------------')
fpleq_val = bitwuzla.get_value(fpleq).value()
print(f'{fpleq}: {fpleq_val} [bool]')
print()
print('Print value of bv const:')
print('------------------------')
print(f'{bv}: {bitwuzla.get_value(bv).value():>8} [str] (bin)')
print(f'{bv}: {bitwuzla.get_value(bv).value(10):>8} [str] (dec)')
print(f'{bv}: {bitwuzla.get_value(bv).value(16):>8} [str] (hex)')
print()
print('Print value of RoundingMode const:')
print('----------------------------------')
print(f'{rm}: {bitwuzla.get_value(rm).value()} [RoundingMode]')
print()
fp_val = bitwuzla.get_value(fp)
print('Print value of fp const as single bit-vector (base ignored):')
print('------------------------------------------------------------')
assert fp_val.value(2, False) == fp_val.value(10, False)
assert fp_val.value(2, False) == fp_val.value(16, False)
print(f'{fp}: {fp_val.value(2, False):>16} [str] (bin)')
print(f'{fp}: {fp_val.value(10, False):>16} [str] (dec [ignored])')
print(f'{fp}: {fp_val.value(16, False):>16} [str] (hex [ignored])')
print()
print('Print value of fp const as list of component bit-vectors:')
print('---------------------------------------------------------')
val = fp_val.value(2)
print(f'{fp}: [{val[0]}, {val[1]:>5}, {val[2]:>11}] [str] (bin)')
val = fp_val.value(10)
print(f'{fp}: [{val[0]}, {val[1]:>5}, {val[2]:>11}] [str] (dec)')
val = fp_val.value(16)
print(f'{fp}: [{val[0]}, {val[1]:>5}, {val[2]:>11}] [str] (hex)')
print()
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