Benchmark

non-incremental/QF_BV/brummayerbiere/nlzbe032.smt2 

Number of leading zeros nlz(x) algorithm, working both ends at the same time
From the book "Hacker's delight" by Henry S. Warren, Jr., page 79
We cross-check it with an obvious method of counting leading zeros:

s = 0;
for (i = BW - 1; i >= 0; i--)
  if (x & (1 << i))
    break;
  else
    s++;

Contributed by Robert Brummayer (robert.brummayer@gmail.com)
Benchmark
Size15583
Compressed Size2136
License Creative Commons Attribution 4.0 International (CC-BY-4.0)
Categorycrafted
First Occurrence2008-07-07
Generated By—
Generated On—
Generator—
Dolmen OK1
strict Dolmen OK1
check-sat calls1
Query 1
Status unsat
Inferred Status unsat
Size 15575
Compressed Size2115
Max. Term Depth107
Asserts 1
Declared Functions0
Declared Constants2
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite182 not1 =166 let95
bvnot33 bvand32 bvor64 bvadd47
bvsub17 bvslt17 bvshl48 bvashr16
zero_extend32

Evaluations

Evaluation Rating Solver Variant Result Wallclock CPU Time
SMT Evaluation 2013 0.11 (8/9) 4Simp 4Simp-SMT-COMP-2012 default unsat ✅ 0.11401 —
Abziz abziz_portfolio_2011_minfeatures_2 default unsat ✅ 0.07728 —
abziz_portfolio_2011_solvers_2 default unsat ✅ 0.08476 —
abziz_portfolio_2012_minfeatures default unsat ✅ 0.06732 —
abziz_portfolio_2012_solvers default unsat ✅ 0.06834 —
AbzizPortfolio-SMT-COMP-2012 default unsat ✅ 0.07336 —
Boolector Boolector-1.5.118-SMT-EVAL-2013 default unsat ✅ 0.11457 —
Boolector-SMT-COMP-2011 default unsat ✅ 0.34879 —
Boolector-SMT-COMP-2012 default unsat ✅ 0.21764 —
CVC3 CVC3-SMT-COMP-2010 default unknown ❌ 205.61600 —
CVC3-SMT-COMP-2011 default unknown ❌ — —
CVC3-SMT-COMP-2012 default unknown ❌ — —
CVC4 CVC4-SMT-COMP-2012-Resubmission default unsat ✅ 0.16564 —
CVC4-SMT-EVAL-2013 default unsat ✅ 0.87827 —
MathSAT MathSAT5-5.2.6-SMT-EVAL-2013 default unsat ✅ 0.37764 —
MathSAT5-HeavyBV-SMT-COMP-2012 default unsat ✅ 0.98980 —
MathSAT5-SMT-COMP-2011 default unsat ✅ 0.40022 —
MathSAT5-SMT-COMP-2012 default unsat ✅ 0.33007 —
SONOLAR SONOLAR-2013-05-15-SMT-EVAL-2013 default unsat ✅ 0.05922 —
SONOLAR-SMT-COMP-2010 default unsat ✅ 0.56088 —
SONOLAR-SMT-COMP-2011 default unsat ✅ 0.07863 —
SONOLAR-SMT-COMP-2012 default unsat ✅ 0.07530 —
STP STP2-SMT-COMP-2011 default unsat ✅ 0.05871 —
STP2-SMT-COMP-2012 default unsat ✅ 0.10510 —
simplifyingSTP-SMT-COMP-2010 default unsat ✅ 0.07922 —
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-EVAL-2013 default unsat ✅ 0.05630 —
Z3-SMT-COMP-2011 default unsat ✅ 0.06288 —
SMT-COMP 2015 Boolector Boolector SMT15 QF_BV final boolector_qf_bv unsat ✅ 0.22678 0.22596
CVC4 CVC4-master-2015-06-15-9b32405-main default unsat ✅ 0.29680 0.56891
CVC4-experimental-2015-06-15-ff5745a-main default unsat ✅ 0.29109 0.55792
MathSAT MathSat 5.3.6 main smtcomp2015_main unsat ✅ 0.40976 0.40894
SMT-RAT SMT-RAT-final default unsat ✅ 10.49310 10.49640
STP stp-cryptominisat4 default unsat ✅ 0.12022 0.11898
stp-cmsat4-v15 default unsat ✅ 0.09292 0.09198
stp-cmsat4-mt-v15 default unknown ❌ 0.07314 0.07199
stp-minisat-v15 default unsat ✅ 0.09128 0.08999
Yices2 Yices default unsat ✅ 0.01835 0.01700
Z3 z3 4.4.0 default unsat ✅ 0.08390 0.08399
SMT-COMP 2016 ABC ABC_default default_abc unsat ✅ 0.11811 0.11509
ABC_glucose glucose unsat ✅ 0.24112 0.23696
Boolector Boolector boolector unsat ✅ 0.48885 0.48909
Boolector preprop boolector unsat ✅ 0.50244 0.50266
CVC4 CVC4-master-2016-05-27-cfef263-main default unsat ✅ 0.28360 0.54556
MapleSTP MapleSTP default unsat ✅ 0.14282 0.14287
MapleSTP-mt default unsat ✅ 0.15327 0.44559
MathSAT mathsat-5.3.11-linux-x86_64-Main default unsat ✅ 0.36531 0.36618
MinkeyRink Minkeyrink 2016 default unsat ✅ 0.24729 0.30916
Q3B Q3B default unsat ✅ 0.19363 0.19561
STP stp-cms-exp-2016 default unsat ✅ 0.10108 0.10107
stp-cms-mt-2016 default unsat ✅ 0.10668 0.26211
stp-cms-st-2016 default unsat ✅ 0.09633 0.09634
stp-minisat-st-2016 default unsat ✅ 0.25376 0.25385
Yices2 Yices-2.4.2 default unsat ✅ 0.02601 0.02599
Z3 z3-4.4.1 default unsat ✅ 0.07919 0.08049
SMT-COMP 2017 Boolector Boolector+CaDiCaL SMT17 final boolector unsat ✅ 0.21075 0.20991
Boolector SMT17 final boolector unsat ✅ 0.56888 0.55124
CVC4 CVC4-smtcomp2017-main default unsat ✅ 0.58967 0.60411
MathSAT mathsat-5.4.1-linux-x86_64-Main default unsat ✅ 0.37617 0.37655
MinkeyRink MinkeyRink 2017.3a default unsat ✅ 0.11302 0.10268
Q3B Q3B default unsat ✅ 0.18045 0.22250
STP stp_st default unsat ✅ 0.32916 0.32844
stp_mt default unsat ✅ 0.31542 0.96380
Yices2 Yices2-Main default unsat ✅ 0.02004 0.01954
Z3 z3-4.5.0 default unsat ✅ 0.08984 0.08978
SMT-COMP 2018 Boolector Boolector_default unsat ✅ 0.19750 0.19747
CVC4 master-2018-06-10-b19c840-competition-default_default unsat ✅ 0.81676 0.81673
MathSAT mathsat-5.5.2-linux-x86_64-Main_default unsat ✅ 0.40609 0.40707
MinkeyRink Minkeyrink MT_mt unsat ✅ 0.07715 0.11872
Minkeyrink ST_st unsat ✅ 0.07577 0.07587
STP STP-CMS-st-2018_default-no-stderr unsat ✅ 0.21075 0.21070
STP-CMS-mt-2018_multicore-no-stderr unsat ✅ 0.18663 0.49470
STP-Riss-st-2018_riss-no-stderr unsat ✅ 0.47438 0.47408
Yices2 Yices 2.6.0_default unsat ✅ 0.02292 0.02287
Z3 z3-4.7.1_default unsat ✅ 0.08373 0.08365