./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i --full-output --architecture 64bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version aef121e0
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-aef121e
[2021-11-23 02:28:02,716 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-11-23 02:28:02,718 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-23 02:28:02,781 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-23 02:28:02,782 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-23 02:28:02,788 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-23 02:28:02,790 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-23 02:28:02,794 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-23 02:28:02,797 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-23 02:28:02,805 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-23 02:28:02,806 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-11-23 02:28:02,808 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-23 02:28:02,809 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-23 02:28:02,812 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-23 02:28:02,814 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-23 02:28:02,822 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-23 02:28:02,825 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-23 02:28:02,826 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-23 02:28:02,829 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-23 02:28:02,836 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-23 02:28:02,838 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-23 02:28:02,840 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-23 02:28:02,843 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-11-23 02:28:02,845 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-23 02:28:02,851 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-23 02:28:02,851 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-23 02:28:02,851 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-23 02:28:02,854 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-23 02:28:02,855 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-23 02:28:02,856 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-23 02:28:02,857 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-23 02:28:02,858 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-23 02:28:02,860 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-23 02:28:02,861 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-23 02:28:02,863 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-23 02:28:02,863 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-23 02:28:02,865 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-23 02:28:02,865 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-23 02:28:02,865 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-23 02:28:02,866 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-23 02:28:02,867 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-11-23 02:28:02,868 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf
[2021-11-23 02:28:02,919 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-11-23 02:28:02,920 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-23 02:28:02,920 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-11-23 02:28:02,921 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-11-23 02:28:02,922 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-23 02:28:02,922 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-11-23 02:28:02,922 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2021-11-23 02:28:02,922 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2021-11-23 02:28:02,923 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2021-11-23 02:28:02,923 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2021-11-23 02:28:02,924 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2021-11-23 02:28:02,924 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2021-11-23 02:28:02,924 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2021-11-23 02:28:02,925 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2021-11-23 02:28:02,925 INFO  L138        SettingsManager]:  * Interval Domain=false
[2021-11-23 02:28:02,925 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2021-11-23 02:28:02,925 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2021-11-23 02:28:02,926 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2021-11-23 02:28:02,928 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-23 02:28:02,928 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-11-23 02:28:02,928 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-11-23 02:28:02,929 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-11-23 02:28:02,929 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-23 02:28:02,929 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-11-23 02:28:02,929 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-11-23 02:28:02,929 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-11-23 02:28:02,932 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-11-23 02:28:02,932 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-23 02:28:02,932 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-11-23 02:28:02,932 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-23 02:28:02,933 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-23 02:28:02,933 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-11-23 02:28:02,933 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-23 02:28:02,934 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2021-11-23 02:28:02,934 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-23 02:28:02,934 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-23 02:28:02,934 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-11-23 02:28:02,935 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2021-11-23 02:28:02,935 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd
[2021-11-23 02:28:03,238 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-23 02:28:03,260 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-23 02:28:03,263 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-23 02:28:03,264 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-11-23 02:28:03,265 INFO  L275        PluginConnector]: CDTParser initialized
[2021-11-23 02:28:03,267 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i
[2021-11-23 02:28:03,337 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/08ee62880/e8aa5935ada74f2ea7b7c30e3eb0b998/FLAGd7e45d935
[2021-11-23 02:28:04,188 INFO  L306              CDTParser]: Found 1 translation units.
[2021-11-23 02:28:04,188 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i
[2021-11-23 02:28:04,240 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/08ee62880/e8aa5935ada74f2ea7b7c30e3eb0b998/FLAGd7e45d935
[2021-11-23 02:28:04,693 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/08ee62880/e8aa5935ada74f2ea7b7c30e3eb0b998
[2021-11-23 02:28:04,695 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-23 02:28:04,696 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-23 02:28:04,710 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-23 02:28:04,710 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-23 02:28:04,713 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-23 02:28:04,714 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:04" (1/1) ...
[2021-11-23 02:28:04,715 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9825ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:04, skipping insertion in model container
[2021-11-23 02:28:04,716 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:04" (1/1) ...
[2021-11-23 02:28:04,724 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-11-23 02:28:04,859 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-11-23 02:28:05,158 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505]
[2021-11-23 02:28:05,165 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565]
[2021-11-23 02:28:06,156 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,157 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,158 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,159 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,160 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,174 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,175 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,177 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,178 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,672 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_load_n
[2021-11-23 02:28:06,673 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_store_n
[2021-11-23 02:28:06,674 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_exchange_n
[2021-11-23 02:28:06,676 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n
[2021-11-23 02:28:06,677 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_add
[2021-11-23 02:28:06,678 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_sub
[2021-11-23 02:28:06,679 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_or
[2021-11-23 02:28:06,680 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_and
[2021-11-23 02:28:06,680 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_xor
[2021-11-23 02:28:06,681 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_thread_fence
[2021-11-23 02:28:06,882 WARN  L610        FunctionHandler]: implicit declaration of function __builtin_va_copy
[2021-11-23 02:28:06,989 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:06,990 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,111 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-11-23 02:28:07,212 INFO  L203         MainTranslator]: Completed pre-run
[2021-11-23 02:28:07,243 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505]
[2021-11-23 02:28:07,244 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565]
[2021-11-23 02:28:07,303 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,304 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,304 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,305 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,306 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,318 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,319 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,320 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,321 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,379 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_load_n
[2021-11-23 02:28:07,380 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_store_n
[2021-11-23 02:28:07,381 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_exchange_n
[2021-11-23 02:28:07,382 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n
[2021-11-23 02:28:07,383 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_add
[2021-11-23 02:28:07,384 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_sub
[2021-11-23 02:28:07,384 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_or
[2021-11-23 02:28:07,385 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_and
[2021-11-23 02:28:07,385 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_fetch_xor
[2021-11-23 02:28:07,391 WARN  L610        FunctionHandler]: implicit declaration of function __atomic_thread_fence
[2021-11-23 02:28:07,427 WARN  L610        FunctionHandler]: implicit declaration of function __builtin_va_copy
[2021-11-23 02:28:07,515 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,516 WARN  L1533              CHandler]: Possible shadowing of function index
[2021-11-23 02:28:07,558 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-11-23 02:28:07,896 INFO  L208         MainTranslator]: Completed translation
[2021-11-23 02:28:07,897 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07 WrapperNode
[2021-11-23 02:28:07,898 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-23 02:28:07,899 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-23 02:28:07,899 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-23 02:28:07,899 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-23 02:28:07,907 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,049 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,167 INFO  L137                Inliner]: procedures = 691, calls = 2631, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 816
[2021-11-23 02:28:08,167 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-23 02:28:08,169 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-23 02:28:08,169 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-23 02:28:08,169 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-11-23 02:28:08,178 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,178 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,192 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,193 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,254 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,274 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,282 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,301 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-23 02:28:08,306 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-23 02:28:08,306 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-11-23 02:28:08,307 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-11-23 02:28:08,308 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ...
[2021-11-23 02:28:08,316 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-23 02:28:08,328 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3
[2021-11-23 02:28:08,347 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-23 02:28:08,386 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-23 02:28:08,422 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid
[2021-11-23 02:28:08,423 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid
[2021-11-23 02:28:08,423 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-11-23 02:28:08,424 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_bool
[2021-11-23 02:28:08,425 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_bool
[2021-11-23 02:28:08,425 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-11-23 02:28:08,426 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-11-23 02:28:08,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-11-23 02:28:08,426 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero
[2021-11-23 02:28:08,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero
[2021-11-23 02:28:08,427 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2021-11-23 02:28:08,427 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-11-23 02:28:08,427 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2021-11-23 02:28:08,427 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-23 02:28:08,428 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-23 02:28:08,428 INFO  L130     BoogieDeclarations]: Found specification of procedure bounded_malloc
[2021-11-23 02:28:08,428 INFO  L138     BoogieDeclarations]: Found implementation of procedure bounded_malloc
[2021-11-23 02:28:08,428 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-11-23 02:28:08,428 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-11-23 02:28:08,428 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-11-23 02:28:08,429 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2021-11-23 02:28:08,429 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2021-11-23 02:28:08,429 INFO  L130     BoogieDeclarations]: Found specification of procedure can_fail_allocator
[2021-11-23 02:28:08,430 INFO  L138     BoogieDeclarations]: Found implementation of procedure can_fail_allocator
[2021-11-23 02:28:08,431 INFO  L130     BoogieDeclarations]: Found specification of procedure assert_all_bytes_are
[2021-11-23 02:28:08,431 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are
[2021-11-23 02:28:08,432 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_uint64_t
[2021-11-23 02:28:08,432 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_uint64_t
[2021-11-23 02:28:08,432 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-11-23 02:28:08,432 INFO  L130     BoogieDeclarations]: Found specification of procedure memset_impl
[2021-11-23 02:28:08,432 INFO  L138     BoogieDeclarations]: Found implementation of procedure memset_impl
[2021-11-23 02:28:08,432 INFO  L130     BoogieDeclarations]: Found specification of procedure my_memset
[2021-11-23 02:28:08,433 INFO  L138     BoogieDeclarations]: Found implementation of procedure my_memset
[2021-11-23 02:28:08,433 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-23 02:28:08,744 INFO  L236             CfgBuilder]: Building ICFG
[2021-11-23 02:28:08,753 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-11-23 02:28:10,331 INFO  L277             CfgBuilder]: Performing block encoding
[2021-11-23 02:28:10,562 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-23 02:28:10,562 INFO  L301             CfgBuilder]: Removed 1 assume(true) statements.
[2021-11-23 02:28:10,565 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:10 BoogieIcfgContainer
[2021-11-23 02:28:10,565 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-23 02:28:10,567 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-23 02:28:10,568 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-11-23 02:28:10,571 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-11-23 02:28:10,571 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:28:04" (1/3) ...
[2021-11-23 02:28:10,572 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178de6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:10, skipping insertion in model container
[2021-11-23 02:28:10,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (2/3) ...
[2021-11-23 02:28:10,573 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178de6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:10, skipping insertion in model container
[2021-11-23 02:28:10,573 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:10" (3/3) ...
[2021-11-23 02:28:10,574 INFO  L111   eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i
[2021-11-23 02:28:10,580 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-23 02:28:10,580 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-23 02:28:10,630 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-23 02:28:10,637 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-11-23 02:28:10,637 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-23 02:28:10,658 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23)
[2021-11-23 02:28:10,664 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2021-11-23 02:28:10,664 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-23 02:28:10,665 INFO  L514         BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-23 02:28:10,665 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-23 02:28:10,671 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-23 02:28:10,671 INFO  L85        PathProgramCache]: Analyzing trace with hash 2135767528, now seen corresponding path program 1 times
[2021-11-23 02:28:10,682 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-23 02:28:10,682 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393141684]
[2021-11-23 02:28:10,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-23 02:28:10,684 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-23 02:28:11,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-23 02:28:11,532 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2021-11-23 02:28:11,533 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-23 02:28:11,533 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393141684]
[2021-11-23 02:28:11,534 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393141684] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-23 02:28:11,535 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-23 02:28:11,536 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-11-23 02:28:11,538 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990856292]
[2021-11-23 02:28:11,539 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-23 02:28:11,544 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2021-11-23 02:28:11,544 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-23 02:28:11,585 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-11-23 02:28:11,586 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-11-23 02:28:11,589 INFO  L87              Difference]: Start difference. First operand  has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand  has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6)
[2021-11-23 02:28:12,471 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-23 02:28:12,471 INFO  L93              Difference]: Finished difference Result 121 states and 153 transitions.
[2021-11-23 02:28:12,474 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-11-23 02:28:12,475 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31
[2021-11-23 02:28:12,476 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-23 02:28:12,492 INFO  L225             Difference]: With dead ends: 121
[2021-11-23 02:28:12,493 INFO  L226             Difference]: Without dead ends: 79
[2021-11-23 02:28:12,497 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2021-11-23 02:28:12,506 INFO  L933         BasicCegarLoop]: 76 mSDtfsCounter, 13 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2021-11-23 02:28:12,507 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 362 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2021-11-23 02:28:12,554 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2021-11-23 02:28:12,597 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79.
[2021-11-23 02:28:12,599 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 79 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21)
[2021-11-23 02:28:12,605 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions.
[2021-11-23 02:28:12,607 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31
[2021-11-23 02:28:12,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-23 02:28:12,608 INFO  L470      AbstractCegarLoop]: Abstraction has 79 states and 94 transitions.
[2021-11-23 02:28:12,609 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6)
[2021-11-23 02:28:12,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions.
[2021-11-23 02:28:12,612 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2021-11-23 02:28:12,613 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-23 02:28:12,613 INFO  L514         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-23 02:28:12,613 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-23 02:28:12,613 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-23 02:28:12,617 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-23 02:28:12,617 INFO  L85        PathProgramCache]: Analyzing trace with hash -2101338410, now seen corresponding path program 1 times
[2021-11-23 02:28:12,617 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-23 02:28:12,617 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038096661]
[2021-11-23 02:28:12,618 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-23 02:28:12,618 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-23 02:28:12,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-23 02:28:13,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2021-11-23 02:28:13,255 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-23 02:28:13,255 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038096661]
[2021-11-23 02:28:13,255 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038096661] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-23 02:28:13,256 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-23 02:28:13,256 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2021-11-23 02:28:13,256 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032028699]
[2021-11-23 02:28:13,256 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-23 02:28:13,257 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2021-11-23 02:28:13,258 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-23 02:28:13,258 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2021-11-23 02:28:13,259 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2021-11-23 02:28:13,259 INFO  L87              Difference]: Start difference. First operand 79 states and 94 transitions. Second operand  has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7)
[2021-11-23 02:28:15,729 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-23 02:28:15,730 INFO  L93              Difference]: Finished difference Result 96 states and 114 transitions.
[2021-11-23 02:28:15,730 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2021-11-23 02:28:15,730 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37
[2021-11-23 02:28:15,731 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-23 02:28:15,733 INFO  L225             Difference]: With dead ends: 96
[2021-11-23 02:28:15,733 INFO  L226             Difference]: Without dead ends: 94
[2021-11-23 02:28:15,733 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182
[2021-11-23 02:28:15,734 INFO  L933         BasicCegarLoop]: 50 mSDtfsCounter, 54 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time
[2021-11-23 02:28:15,735 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 197 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time]
[2021-11-23 02:28:15,736 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2021-11-23 02:28:15,748 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87.
[2021-11-23 02:28:15,749 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 87 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23)
[2021-11-23 02:28:15,750 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions.
[2021-11-23 02:28:15,751 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37
[2021-11-23 02:28:15,751 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-23 02:28:15,751 INFO  L470      AbstractCegarLoop]: Abstraction has 87 states and 103 transitions.
[2021-11-23 02:28:15,752 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7)
[2021-11-23 02:28:15,752 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions.
[2021-11-23 02:28:15,754 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2021-11-23 02:28:15,754 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-23 02:28:15,754 INFO  L514         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-23 02:28:15,754 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-23 02:28:15,755 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-23 02:28:15,755 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-23 02:28:15,755 INFO  L85        PathProgramCache]: Analyzing trace with hash 257990555, now seen corresponding path program 1 times
[2021-11-23 02:28:15,755 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-23 02:28:15,756 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594478313]
[2021-11-23 02:28:15,756 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-23 02:28:15,756 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-23 02:28:16,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-23 02:28:17,013 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2021-11-23 02:28:17,013 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-23 02:28:17,013 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594478313]
[2021-11-23 02:28:17,014 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594478313] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-23 02:28:17,014 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-23 02:28:17,014 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2021-11-23 02:28:17,014 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769711915]
[2021-11-23 02:28:17,014 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-23 02:28:17,015 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2021-11-23 02:28:17,015 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-23 02:28:17,015 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2021-11-23 02:28:17,016 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156
[2021-11-23 02:28:17,016 INFO  L87              Difference]: Start difference. First operand 87 states and 103 transitions. Second operand  has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9)
[2021-11-23 02:28:19,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-23 02:28:19,053 INFO  L93              Difference]: Finished difference Result 98 states and 115 transitions.
[2021-11-23 02:28:19,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2021-11-23 02:28:19,054 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 44
[2021-11-23 02:28:19,054 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-23 02:28:19,057 INFO  L225             Difference]: With dead ends: 98
[2021-11-23 02:28:19,058 INFO  L226             Difference]: Without dead ends: 96
[2021-11-23 02:28:19,058 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380
[2021-11-23 02:28:19,060 INFO  L933         BasicCegarLoop]: 62 mSDtfsCounter, 35 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2021-11-23 02:28:19,060 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 622 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2021-11-23 02:28:19,062 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2021-11-23 02:28:19,074 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94.
[2021-11-23 02:28:19,074 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 94 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25)
[2021-11-23 02:28:19,076 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions.
[2021-11-23 02:28:19,076 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 44
[2021-11-23 02:28:19,077 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-23 02:28:19,077 INFO  L470      AbstractCegarLoop]: Abstraction has 94 states and 111 transitions.
[2021-11-23 02:28:19,077 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9)
[2021-11-23 02:28:19,077 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions.
[2021-11-23 02:28:19,079 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2021-11-23 02:28:19,079 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-23 02:28:19,080 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-23 02:28:19,080 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-11-23 02:28:19,080 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-23 02:28:19,081 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-23 02:28:19,081 INFO  L85        PathProgramCache]: Analyzing trace with hash -418782654, now seen corresponding path program 1 times
[2021-11-23 02:28:19,081 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-23 02:28:19,081 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905316939]
[2021-11-23 02:28:19,084 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-23 02:28:19,084 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-23 02:28:19,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-23 02:28:19,519 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2021-11-23 02:28:19,519 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-23 02:28:19,519 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905316939]
[2021-11-23 02:28:19,519 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905316939] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-23 02:28:19,524 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-23 02:28:19,524 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2021-11-23 02:28:19,525 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726894341]
[2021-11-23 02:28:19,525 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-23 02:28:19,525 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2021-11-23 02:28:19,526 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-23 02:28:19,526 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2021-11-23 02:28:19,527 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2021-11-23 02:28:19,527 INFO  L87              Difference]: Start difference. First operand 94 states and 111 transitions. Second operand  has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2021-11-23 02:28:21,680 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-23 02:28:21,680 INFO  L93              Difference]: Finished difference Result 107 states and 125 transitions.
[2021-11-23 02:28:21,680 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2021-11-23 02:28:21,681 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43
[2021-11-23 02:28:21,681 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-23 02:28:21,682 INFO  L225             Difference]: With dead ends: 107
[2021-11-23 02:28:21,683 INFO  L226             Difference]: Without dead ends: 105
[2021-11-23 02:28:21,683 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182
[2021-11-23 02:28:21,684 INFO  L933         BasicCegarLoop]: 50 mSDtfsCounter, 58 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2021-11-23 02:28:21,685 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 175 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2021-11-23 02:28:21,686 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 105 states.
[2021-11-23 02:28:21,706 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100.
[2021-11-23 02:28:21,707 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 100 states, 57 states have (on average 1.105263157894737) internal successors, (63), 60 states have internal predecessors, (63), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26)
[2021-11-23 02:28:21,711 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions.
[2021-11-23 02:28:21,712 INFO  L78                 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 43
[2021-11-23 02:28:21,712 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-23 02:28:21,713 INFO  L470      AbstractCegarLoop]: Abstraction has 100 states and 117 transitions.
[2021-11-23 02:28:21,714 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2021-11-23 02:28:21,715 INFO  L276                IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions.
[2021-11-23 02:28:21,720 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2021-11-23 02:28:21,721 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-23 02:28:21,721 INFO  L514         BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-23 02:28:21,721 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-11-23 02:28:21,722 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-23 02:28:21,722 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-23 02:28:21,722 INFO  L85        PathProgramCache]: Analyzing trace with hash -463655508, now seen corresponding path program 1 times
[2021-11-23 02:28:21,722 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-23 02:28:21,723 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127657986]
[2021-11-23 02:28:21,723 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-23 02:28:21,723 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-23 02:28:22,159 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-23 02:28:22,414 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2021-11-23 02:28:22,414 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-23 02:28:22,414 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127657986]
[2021-11-23 02:28:22,414 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127657986] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-23 02:28:22,415 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-23 02:28:22,415 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2021-11-23 02:28:22,415 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67674991]
[2021-11-23 02:28:22,415 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-23 02:28:22,416 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-23 02:28:22,416 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-23 02:28:22,416 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-23 02:28:22,417 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2021-11-23 02:28:22,417 INFO  L87              Difference]: Start difference. First operand 100 states and 117 transitions. Second operand  has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2021-11-23 02:28:23,815 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-23 02:28:23,815 INFO  L93              Difference]: Finished difference Result 111 states and 128 transitions.
[2021-11-23 02:28:23,816 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2021-11-23 02:28:23,816 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 49
[2021-11-23 02:28:23,816 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-23 02:28:23,818 INFO  L225             Difference]: With dead ends: 111
[2021-11-23 02:28:23,818 INFO  L226             Difference]: Without dead ends: 109
[2021-11-23 02:28:23,818 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110
[2021-11-23 02:28:23,819 INFO  L933         BasicCegarLoop]: 74 mSDtfsCounter, 28 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2021-11-23 02:28:23,820 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 432 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2021-11-23 02:28:23,821 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2021-11-23 02:28:23,833 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106.
[2021-11-23 02:28:23,833 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 106 states, 61 states have (on average 1.098360655737705) internal successors, (67), 64 states have internal predecessors, (67), 29 states have call successors, (29), 16 states have call predecessors, (29), 15 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27)
[2021-11-23 02:28:23,834 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions.
[2021-11-23 02:28:23,835 INFO  L78                 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49
[2021-11-23 02:28:23,835 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-23 02:28:23,835 INFO  L470      AbstractCegarLoop]: Abstraction has 106 states and 123 transitions.
[2021-11-23 02:28:23,836 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2021-11-23 02:28:23,836 INFO  L276                IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions.
[2021-11-23 02:28:23,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2021-11-23 02:28:23,837 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-23 02:28:23,838 INFO  L514         BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-23 02:28:23,838 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-11-23 02:28:23,838 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-23 02:28:23,839 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-23 02:28:23,839 INFO  L85        PathProgramCache]: Analyzing trace with hash 1351434591, now seen corresponding path program 1 times
[2021-11-23 02:28:23,839 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-23 02:28:23,839 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626958879]
[2021-11-23 02:28:23,839 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-23 02:28:23,840 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-23 02:28:24,730 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-23 02:28:25,372 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2021-11-23 02:28:25,373 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-23 02:28:25,373 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626958879]
[2021-11-23 02:28:25,373 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626958879] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-23 02:28:25,373 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548243306]
[2021-11-23 02:28:25,373 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-23 02:28:25,373 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-23 02:28:25,374 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3
[2021-11-23 02:28:25,379 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-23 02:28:25,400 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-11-23 02:28:25,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-23 02:28:25,916 INFO  L263         TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 76 conjunts are in the unsatisfiable core
[2021-11-23 02:28:25,929 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-23 02:28:26,265 INFO  L388             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14
[2021-11-23 02:28:31,279 INFO  L388             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4
[2021-11-23 02:28:31,365 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2021-11-23 02:28:31,366 INFO  L173   IndexEqualityManager]: detected equality via solver
[2021-11-23 02:28:31,370 INFO  L354             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-23 02:28:31,370 INFO  L388             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22
[2021-11-23 02:28:31,498 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2021-11-23 02:28:31,498 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-23 02:28:34,772 WARN  L176   XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time...