Benchmark

non-incremental/QF_BV/brummayerbiere/nlzbe016.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
Size8006
Compressed Size1460
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 7998
Compressed Size1420
Max. Term Depth59
Asserts 1
Declared Functions0
Declared Constants2
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite94 not1 =86 let47
bvnot17 bvand16 bvor32 bvadd23
bvsub9 bvslt9 bvshl24 bvashr8
zero_extend16

Evaluations

Evaluation Rating Solver Variant Result Wallclock CPU Time
SMT Evaluation 2013 0.33 (6/9) 4Simp 4Simp-SMT-COMP-2012 default unknown ❌ — —
Abziz abziz_portfolio_2011_minfeatures_2 default unsat ✅ — —
abziz_portfolio_2011_solvers_2 default unsat ✅ 0.02837 —
abziz_portfolio_2012_minfeatures default unsat ✅ 0.02855 —
abziz_portfolio_2012_solvers default unsat ✅ — —
AbzizPortfolio-SMT-COMP-2012 default unsat ✅ 0.02825 —
Boolector Boolector-1.5.118-SMT-EVAL-2013 default unsat ✅ 0.02128 —
Boolector-SMT-COMP-2011 default unknown ❌ — —
Boolector-SMT-COMP-2012 default unknown ❌ — —
CVC3 CVC3-SMT-COMP-2010 default unknown ❌ — —
CVC3-SMT-COMP-2011 default unknown ❌ — —
CVC3-SMT-COMP-2012 default unknown ❌ — —
CVC4 CVC4-SMT-COMP-2012-Resubmission default unsat ✅ 0.05339 —
CVC4-SMT-EVAL-2013 default unknown ❌ — —
MathSAT MathSAT5-5.2.6-SMT-EVAL-2013 default unknown ❌ — —
MathSAT5-HeavyBV-SMT-COMP-2012 default unknown ❌ — —
MathSAT5-SMT-COMP-2011 default unknown ❌ — —
MathSAT5-SMT-COMP-2012 default unknown ❌ — —
SONOLAR SONOLAR-2013-05-15-SMT-EVAL-2013 default unsat ✅ 0.01674 —
SONOLAR-SMT-COMP-2010 default unknown ❌ — —
SONOLAR-SMT-COMP-2011 default unsat ✅ 0.02259 —
SONOLAR-SMT-COMP-2012 default unsat ✅ 0.02458 —
STP STP2-SMT-COMP-2011 default unsat ✅ 0.02397 —
STP2-SMT-COMP-2012 default unsat ✅ 0.03731 —
simplifyingSTP-SMT-COMP-2010 default unsat ✅ 0.02633 —
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-EVAL-2013 default unsat ✅ 0.02248 —
Z3-SMT-COMP-2011 default unsat ✅ 0.02273 —
SMT-COMP 2014 4Simp 4Simp - 2014 default unsat ✅ 0.02959 0.01900
Abziz abziz_portfolio_all_features default unsat ✅ 0.07016 0.05699
abziz_portfolio_min_features default unsat ✅ 0.07691 0.06399
Boolector Boolector boolector unsat ✅ 0.07904 0.06399
CVC4 CVC4 f7118b2 default unsat ✅ 0.18863 0.34195
MathSAT MathSAT-5.2.12-Main default unsat ✅ 0.08576 0.07599
SONOLAR sonolar_smtcomp-2014 default unsat ✅ 0.02776 0.01600
STP stp-cryptominisat4 default unsat ✅ 0.04460 0.04299
Yices2 Yices-2.2.1-smtcomp2014 default unsat ✅ 0.01301 0.00400
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-COMP-2014 default unsat ✅ 0.03136 0.02100
SMT-COMP 2015 Boolector Boolector SMT15 QF_BV final boolector_qf_bv unsat ✅ 0.04801 0.04699
CVC4 CVC4-master-2015-06-15-9b32405-main default unsat ✅ 0.08964 0.15997
CVC4-experimental-2015-06-15-ff5745a-main default unsat ✅ 0.08699 0.15598
MathSAT MathSat 5.3.6 main smtcomp2015_main unsat ✅ 0.10560 0.10498
SMT-RAT SMT-RAT-final default unsat ✅ 1.66265 1.66175
STP stp-cryptominisat4 default unsat ✅ 0.04250 0.04099
stp-cmsat4-v15 default unsat ✅ 0.04017 0.03899
stp-cmsat4-mt-v15 default unknown ❌ 0.04331 0.04199
stp-minisat-v15 default unsat ✅ 0.03740 0.03599
Yices2 Yices default unsat ✅ 0.00847 0.00500
Z3 z3 4.4.0 default unsat ✅ 0.03920 0.03899
SMT-COMP 2016 ABC ABC_default default_abc unsat ✅ 0.07566 0.07583
ABC_glucose glucose unsat ✅ 0.10316 0.10349
Boolector Boolector boolector unsat ✅ 0.11931 0.11952
Boolector preprop boolector unsat ✅ 0.12686 0.12725
CVC4 CVC4-master-2016-05-27-cfef263-main default unsat ✅ 0.08417 0.15200
MapleSTP MapleSTP default unsat ✅ 0.03395 0.03393
MapleSTP-mt default unsat ✅ 0.03840 0.07381
MathSAT mathsat-5.3.11-linux-x86_64-Main default unsat ✅ 0.09625 0.09729
MinkeyRink Minkeyrink 2016 default unsat ✅ 0.10465 0.12255
Q3B Q3B default unsat ✅ 0.09384 0.09498
STP stp-cms-exp-2016 default unsat ✅ 0.03440 0.03435
stp-cms-mt-2016 default unsat ✅ 0.03842 0.07273
stp-cms-st-2016 default unsat ✅ 0.03290 0.03288
stp-minisat-st-2016 default unsat ✅ 0.06042 0.06043
Yices2 Yices-2.4.2 default unsat ✅ 0.01246 0.00656
Z3 z3-4.4.1 default unsat ✅ 0.03664 0.03785
SMT-COMP 2017 Boolector Boolector+CaDiCaL SMT17 final boolector unsat ✅ 0.07222 0.06875
Boolector SMT17 final boolector unsat ✅ 0.18011 0.17895
CVC4 CVC4-smtcomp2017-main default unsat ✅ 1.57441 0.52278
MathSAT mathsat-5.4.1-linux-x86_64-Main default unsat ✅ 0.10357 0.10495
MinkeyRink MinkeyRink 2017.3a default unsat ✅ 0.09486 0.05969
Q3B Q3B default unsat ✅ 0.09813 0.09338
STP stp_st default unsat ✅ 0.05053 0.04661
stp_mt default unsat ✅ 0.05826 0.08052
Yices2 Yices2-Main default unsat ✅ 0.01204 0.00682
Z3 z3-4.5.0 default unsat ✅ 0.04962 0.04893
SMT-COMP 2018 Boolector Boolector_default unsat ✅ 0.05992 0.05984
CVC4 master-2018-06-10-b19c840-competition-default_default unsat ✅ 0.17447 0.17465
MathSAT mathsat-5.5.2-linux-x86_64-Main_default unsat ✅ 0.09883 0.09982
MinkeyRink Minkeyrink MT_mt unsat ✅ 0.04851 0.05799
Minkeyrink ST_st unsat ✅ 0.04150 0.04172
STP STP-CMS-st-2018_default-no-stderr unsat ✅ 0.03371 0.03390
STP-CMS-mt-2018_multicore-no-stderr unsat ✅ 0.03772 0.04674
STP-Riss-st-2018_riss-no-stderr unsat ✅ 0.12040 0.12044
Yices2 Yices 2.6.0_default unsat ✅ 0.00799 0.00795
Z3 z3-4.7.1_default unsat ✅ 0.04811 0.04806