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


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


Checking for ERROR reachability
Using default analysis
Version 4d014703
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_pop_front_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 971edb75bb0f677639f0c3e5b019bf9afe7575a35e63ddba584727b568db50c6
--- Real Ultimate output ---
This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470
[2021-11-02 12:23:49,992 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-11-02 12:23:49,993 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-02 12:23:50,022 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-02 12:23:50,023 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-02 12:23:50,026 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-02 12:23:50,029 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-02 12:23:50,040 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-02 12:23:50,043 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-02 12:23:50,049 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-02 12:23:50,050 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-11-02 12:23:50,050 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-02 12:23:50,052 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-02 12:23:50,054 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-02 12:23:50,056 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-02 12:23:50,058 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-02 12:23:50,060 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-02 12:23:50,061 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-02 12:23:50,062 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-02 12:23:50,067 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-02 12:23:50,070 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-02 12:23:50,073 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-02 12:23:50,074 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-11-02 12:23:50,075 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-02 12:23:50,077 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-02 12:23:50,078 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-02 12:23:50,079 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-02 12:23:50,080 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-02 12:23:50,081 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-02 12:23:50,082 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-02 12:23:50,082 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-02 12:23:50,083 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-02 12:23:50,084 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-02 12:23:50,085 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-02 12:23:50,086 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-02 12:23:50,086 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-02 12:23:50,087 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-02 12:23:50,087 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-02 12:23:50,087 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-02 12:23:50,088 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-02 12:23:50,089 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-11-02 12:23:50,090 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf
[2021-11-02 12:23:50,124 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-11-02 12:23:50,127 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-02 12:23:50,128 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-11-02 12:23:50,128 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-11-02 12:23:50,129 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-11-02 12:23:50,130 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-11-02 12:23:50,130 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-11-02 12:23:50,130 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-02 12:23:50,130 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-11-02 12:23:50,130 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-11-02 12:23:50,131 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-11-02 12:23:50,131 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-02 12:23:50,131 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-11-02 12:23:50,132 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-11-02 12:23:50,132 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-11-02 12:23:50,132 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-11-02 12:23:50,132 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-02 12:23:50,132 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-11-02 12:23:50,133 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-11-02 12:23:50,133 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-02 12:23:50,133 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-02 12:23:50,133 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-11-02 12:23:50,133 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-02 12:23:50,133 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-11-02 12:23:50,134 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-02 12:23:50,134 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-11-02 12:23:50,134 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-11-02 12:23:50,134 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-02 12:23:50,134 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-11-02 12:23:50,135 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
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 -> Automizer
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 -> 971edb75bb0f677639f0c3e5b019bf9afe7575a35e63ddba584727b568db50c6
[2021-11-02 12:23:50,377 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-02 12:23:50,401 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-02 12:23:50,404 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-02 12:23:50,405 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-11-02 12:23:50,406 INFO  L275        PluginConnector]: CDTParser initialized
[2021-11-02 12:23:50,407 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_pop_front_harness.i
[2021-11-02 12:23:50,475 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09869bff3/a02cc02c2e324209940675b36bf2ec1a/FLAG8604913b7
[2021-11-02 12:23:51,146 INFO  L306              CDTParser]: Found 1 translation units.
[2021-11-02 12:23:51,147 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_pop_front_harness.i
[2021-11-02 12:23:51,181 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09869bff3/a02cc02c2e324209940675b36bf2ec1a/FLAG8604913b7
[2021-11-02 12:23:51,480 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09869bff3/a02cc02c2e324209940675b36bf2ec1a
[2021-11-02 12:23:51,483 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-02 12:23:51,485 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-02 12:23:51,489 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-02 12:23:51,489 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-02 12:23:51,492 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-02 12:23:51,493 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:51" (1/1) ...
[2021-11-02 12:23:51,494 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d3665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:51, skipping insertion in model container
[2021-11-02 12:23:51,495 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:51" (1/1) ...
[2021-11-02 12:23:51,501 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-11-02 12:23:51,587 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-11-02 12:23:51,817 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_pop_front_harness.i[4498,4511]
[2021-11-02 12:23:51,823 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_pop_front_harness.i[4558,4571]
[2021-11-02 12:23:51,842 WARN  L612        FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow
[2021-11-02 12:23:51,848 WARN  L612        FunctionHandler]: implicit declaration of function __builtin_umull_overflow
[2021-11-02 12:23:52,295 WARN  L612        FunctionHandler]: implicit declaration of function __builtin_va_copy
[2021-11-02 12:23:52,342 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,350 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,353 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,353 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,354 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,363 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,364 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,365 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,365 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,366 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,367 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,367 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,368 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,555 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_load_n
[2021-11-02 12:23:52,556 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_store_n
[2021-11-02 12:23:52,556 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_exchange_n
[2021-11-02 12:23:52,557 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n
[2021-11-02 12:23:52,559 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_add
[2021-11-02 12:23:52,559 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_sub
[2021-11-02 12:23:52,560 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_or
[2021-11-02 12:23:52,560 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_and
[2021-11-02 12:23:52,561 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_xor
[2021-11-02 12:23:52,561 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_thread_fence
[2021-11-02 12:23:52,668 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,673 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,730 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-02 12:23:52,794 INFO  L203         MainTranslator]: Completed pre-run
[2021-11-02 12:23:52,831 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_pop_front_harness.i[4498,4511]
[2021-11-02 12:23:52,836 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_pop_front_harness.i[4558,4571]
[2021-11-02 12:23:52,838 WARN  L612        FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow
[2021-11-02 12:23:52,840 WARN  L612        FunctionHandler]: implicit declaration of function __builtin_umull_overflow
[2021-11-02 12:23:52,879 WARN  L612        FunctionHandler]: implicit declaration of function __builtin_va_copy
[2021-11-02 12:23:52,897 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,897 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,897 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,898 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,898 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,902 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,905 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,906 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,907 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,907 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,908 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,908 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,911 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,944 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_load_n
[2021-11-02 12:23:52,944 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_store_n
[2021-11-02 12:23:52,945 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_exchange_n
[2021-11-02 12:23:52,947 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n
[2021-11-02 12:23:52,947 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_add
[2021-11-02 12:23:52,948 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_sub
[2021-11-02 12:23:52,948 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_or
[2021-11-02 12:23:52,948 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_and
[2021-11-02 12:23:52,949 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_fetch_xor
[2021-11-02 12:23:52,949 WARN  L612        FunctionHandler]: implicit declaration of function __atomic_thread_fence
[2021-11-02 12:23:52,993 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:52,997 WARN  L1529              CHandler]: Possible shadowing of function index
[2021-11-02 12:23:53,022 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-02 12:23:53,194 INFO  L208         MainTranslator]: Completed translation
[2021-11-02 12:23:53,195 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53 WrapperNode
[2021-11-02 12:23:53,195 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-02 12:23:53,196 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-02 12:23:53,196 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-02 12:23:53,196 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-02 12:23:53,203 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,286 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,388 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-02 12:23:53,390 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-02 12:23:53,390 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-02 12:23:53,390 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-11-02 12:23:53,398 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,398 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,412 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,413 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,497 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,511 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,522 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,548 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-02 12:23:53,549 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-02 12:23:53,550 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-11-02 12:23:53,550 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-11-02 12:23:53,551 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (1/1) ...
[2021-11-02 12:23:53,557 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-02 12:23:53,566 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-11-02 12:23:53,580 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-02 12:23:53,606 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-02 12:23:53,623 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-11-02 12:23:53,624 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-11-02 12:23:53,624 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2021-11-02 12:23:53,624 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2021-11-02 12:23:53,625 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-02 12:23:53,625 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-02 12:23:53,625 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-11-02 12:23:53,625 INFO  L130     BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow
[2021-11-02 12:23:53,625 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2021-11-02 12:23:53,626 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2021-11-02 12:23:53,626 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-11-02 12:23:53,626 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-02 12:23:58,776 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-02 12:23:58,776 INFO  L299             CfgBuilder]: Removed 306 assume(true) statements.
[2021-11-02 12:23:58,780 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:23:58 BoogieIcfgContainer
[2021-11-02 12:23:58,780 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-02 12:23:58,781 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-02 12:23:58,782 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-11-02 12:23:58,784 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-11-02 12:23:58,785 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:23:51" (1/3) ...
[2021-11-02 12:23:58,785 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151bbf28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:23:58, skipping insertion in model container
[2021-11-02 12:23:58,786 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:53" (2/3) ...
[2021-11-02 12:23:58,787 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151bbf28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:23:58, skipping insertion in model container
[2021-11-02 12:23:58,787 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:23:58" (3/3) ...
[2021-11-02 12:23:58,793 INFO  L111   eAbstractionObserver]: Analyzing ICFG aws_array_list_pop_front_harness.i
[2021-11-02 12:23:58,798 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-02 12:23:58,799 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations.
[2021-11-02 12:23:58,843 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-02 12:23:58,850 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=PETRI_NET, 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
[2021-11-02 12:23:58,850 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 20 error locations.
[2021-11-02 12:23:58,876 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 381 states, 360 states have (on average 1.4166666666666667) internal successors, (510), 380 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:23:58,881 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-11-02 12:23:58,881 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-02 12:23:58,882 INFO  L514         BasicCegarLoop]: trace histogram [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]
[2021-11-02 12:23:58,882 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] ===
[2021-11-02 12:23:58,893 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-02 12:23:58,893 INFO  L85        PathProgramCache]: Analyzing trace with hash 1102187548, now seen corresponding path program 1 times
[2021-11-02 12:23:58,901 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-02 12:23:58,901 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596378032]
[2021-11-02 12:23:58,902 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:23:58,902 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-02 12:23:59,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-02 12:23:59,488 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-02 12:23:59,489 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-02 12:23:59,489 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596378032]
[2021-11-02 12:23:59,489 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596378032] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-02 12:23:59,490 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-02 12:23:59,490 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-02 12:23:59,491 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340701732]
[2021-11-02 12:23:59,495 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-11-02 12:23:59,495 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-02 12:23:59,517 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-11-02 12:23:59,517 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-11-02 12:23:59,520 INFO  L87              Difference]: Start difference. First operand  has 381 states, 360 states have (on average 1.4166666666666667) internal successors, (510), 380 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:01,611 WARN  L515   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []
[2021-11-02 12:24:04,091 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-02 12:24:04,092 INFO  L93              Difference]: Finished difference Result 758 states and 1015 transitions.
[2021-11-02 12:24:04,093 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2021-11-02 12:24:04,094 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33
[2021-11-02 12:24:04,095 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-02 12:24:04,104 INFO  L225             Difference]: With dead ends: 758
[2021-11-02 12:24:04,104 INFO  L226             Difference]: Without dead ends: 376
[2021-11-02 12:24:04,110 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-11-02 12:24:04,113 INFO  L933         BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3930.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4452.49ms IncrementalHoareTripleChecker+Time
[2021-11-02 12:24:04,113 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 476 Unknown, 0 Unchecked, 8.06ms Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 1 Unknown, 0 Unchecked, 4452.49ms Time]
[2021-11-02 12:24:04,129 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 376 states.
[2021-11-02 12:24:04,160 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376.
[2021-11-02 12:24:04,161 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 376 states, 356 states have (on average 1.3230337078651686) internal successors, (471), 375 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:04,163 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 471 transitions.
[2021-11-02 12:24:04,164 INFO  L78                 Accepts]: Start accepts. Automaton has 376 states and 471 transitions. Word has length 33
[2021-11-02 12:24:04,164 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-02 12:24:04,165 INFO  L470      AbstractCegarLoop]: Abstraction has 376 states and 471 transitions.
[2021-11-02 12:24:04,165 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:04,165 INFO  L276                IsEmpty]: Start isEmpty. Operand 376 states and 471 transitions.
[2021-11-02 12:24:04,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-11-02 12:24:04,166 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-02 12:24:04,167 INFO  L514         BasicCegarLoop]: trace histogram [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]
[2021-11-02 12:24:04,167 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-02 12:24:04,167 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] ===
[2021-11-02 12:24:04,168 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-02 12:24:04,168 INFO  L85        PathProgramCache]: Analyzing trace with hash -977674992, now seen corresponding path program 1 times
[2021-11-02 12:24:04,168 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-02 12:24:04,168 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062699090]
[2021-11-02 12:24:04,169 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:04,169 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-02 12:24:04,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-02 12:24:04,428 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-02 12:24:04,429 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-02 12:24:04,429 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062699090]
[2021-11-02 12:24:04,429 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062699090] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-02 12:24:04,429 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-02 12:24:04,429 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-02 12:24:04,429 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367380881]
[2021-11-02 12:24:04,430 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-02 12:24:04,431 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-02 12:24:04,432 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-02 12:24:04,432 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-02 12:24:04,433 INFO  L87              Difference]: Start difference. First operand 376 states and 471 transitions. Second operand  has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:06,505 WARN  L515   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []
[2021-11-02 12:24:10,488 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-02 12:24:10,488 INFO  L93              Difference]: Finished difference Result 739 states and 927 transitions.
[2021-11-02 12:24:10,488 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-02 12:24:10,489 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33
[2021-11-02 12:24:10,489 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-02 12:24:10,491 INFO  L225             Difference]: With dead ends: 739
[2021-11-02 12:24:10,491 INFO  L226             Difference]: Without dead ends: 377
[2021-11-02 12:24:10,492 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.06ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-02 12:24:10,493 INFO  L933         BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5384.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5952.11ms IncrementalHoareTripleChecker+Time
[2021-11-02 12:24:10,494 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 940 Unknown, 0 Unchecked, 20.08ms Time], IncrementalHoareTripleChecker [0 Valid, 939 Invalid, 1 Unknown, 0 Unchecked, 5952.11ms Time]
[2021-11-02 12:24:10,496 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 377 states.
[2021-11-02 12:24:10,519 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377.
[2021-11-02 12:24:10,520 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 377 states, 357 states have (on average 1.3221288515406162) internal successors, (472), 376 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:10,522 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 472 transitions.
[2021-11-02 12:24:10,522 INFO  L78                 Accepts]: Start accepts. Automaton has 377 states and 472 transitions. Word has length 33
[2021-11-02 12:24:10,522 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-02 12:24:10,522 INFO  L470      AbstractCegarLoop]: Abstraction has 377 states and 472 transitions.
[2021-11-02 12:24:10,523 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:10,523 INFO  L276                IsEmpty]: Start isEmpty. Operand 377 states and 472 transitions.
[2021-11-02 12:24:10,524 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-11-02 12:24:10,524 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-02 12:24:10,524 INFO  L514         BasicCegarLoop]: trace histogram [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]
[2021-11-02 12:24:10,524 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-02 12:24:10,525 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] ===
[2021-11-02 12:24:10,525 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-02 12:24:10,525 INFO  L85        PathProgramCache]: Analyzing trace with hash -468201902, now seen corresponding path program 1 times
[2021-11-02 12:24:10,525 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-02 12:24:10,526 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504236396]
[2021-11-02 12:24:10,526 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:10,526 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-02 12:24:10,613 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-02 12:24:10,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-02 12:24:10,877 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-02 12:24:10,877 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504236396]
[2021-11-02 12:24:10,877 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504236396] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-02 12:24:10,877 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-02 12:24:10,878 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-11-02 12:24:10,878 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292095847]
[2021-11-02 12:24:10,878 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-02 12:24:10,879 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-02 12:24:10,879 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-02 12:24:10,879 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-02 12:24:10,879 INFO  L87              Difference]: Start difference. First operand 377 states and 472 transitions. Second operand  has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:12,934 WARN  L515   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []
[2021-11-02 12:24:16,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-02 12:24:16,418 INFO  L93              Difference]: Finished difference Result 722 states and 904 transitions.
[2021-11-02 12:24:16,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-02 12:24:16,418 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33
[2021-11-02 12:24:16,418 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-02 12:24:16,420 INFO  L225             Difference]: With dead ends: 722
[2021-11-02 12:24:16,420 INFO  L226             Difference]: Without dead ends: 377
[2021-11-02 12:24:16,421 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.74ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-02 12:24:16,422 INFO  L933         BasicCegarLoop]: 0 mSDtfsCounter, 456 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4923.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.75ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5439.01ms IncrementalHoareTripleChecker+Time
[2021-11-02 12:24:16,423 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 0 Invalid, 867 Unknown, 0 Unchecked, 14.75ms Time], IncrementalHoareTripleChecker [4 Valid, 862 Invalid, 1 Unknown, 0 Unchecked, 5439.01ms Time]
[2021-11-02 12:24:16,424 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 377 states.
[2021-11-02 12:24:16,434 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377.
[2021-11-02 12:24:16,435 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 377 states, 357 states have (on average 1.3137254901960784) internal successors, (469), 376 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:16,437 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 469 transitions.
[2021-11-02 12:24:16,437 INFO  L78                 Accepts]: Start accepts. Automaton has 377 states and 469 transitions. Word has length 33
[2021-11-02 12:24:16,437 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-02 12:24:16,437 INFO  L470      AbstractCegarLoop]: Abstraction has 377 states and 469 transitions.
[2021-11-02 12:24:16,438 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:16,438 INFO  L276                IsEmpty]: Start isEmpty. Operand 377 states and 469 transitions.
[2021-11-02 12:24:16,439 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2021-11-02 12:24:16,439 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-02 12:24:16,439 INFO  L514         BasicCegarLoop]: trace histogram [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]
[2021-11-02 12:24:16,439 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-11-02 12:24:16,440 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] ===
[2021-11-02 12:24:16,440 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-02 12:24:16,440 INFO  L85        PathProgramCache]: Analyzing trace with hash 721547164, now seen corresponding path program 1 times
[2021-11-02 12:24:16,440 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-02 12:24:16,441 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262030097]
[2021-11-02 12:24:16,441 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:16,441 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-02 12:24:16,534 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-02 12:24:16,534 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85451593]
[2021-11-02 12:24:16,535 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:16,535 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-02 12:24:16,535 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-11-02 12:24:16,539 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-02 12:24:16,556 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-11-02 12:24:17,312 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-02 12:24:17,332 INFO  L263         TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 3 conjunts are in the unsatisfiable core
[2021-11-02 12:24:17,340 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-02 12:24:17,559 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-02 12:24:17,559 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-02 12:24:17,560 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-02 12:24:17,560 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262030097]
[2021-11-02 12:24:17,560 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-02 12:24:17,560 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85451593]
[2021-11-02 12:24:17,560 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [85451593] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-02 12:24:17,560 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-02 12:24:17,561 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-11-02 12:24:17,561 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641667714]
[2021-11-02 12:24:17,561 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-02 12:24:17,561 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-02 12:24:17,562 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-02 12:24:17,562 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-02 12:24:17,562 INFO  L87              Difference]: Start difference. First operand 377 states and 469 transitions. Second operand  has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:19,618 WARN  L515   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []
[2021-11-02 12:24:25,273 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-02 12:24:25,273 INFO  L93              Difference]: Finished difference Result 803 states and 1012 transitions.
[2021-11-02 12:24:25,274 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-11-02 12:24:25,274 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49
[2021-11-02 12:24:25,275 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-02 12:24:25,277 INFO  L225             Difference]: With dead ends: 803
[2021-11-02 12:24:25,277 INFO  L226             Difference]: Without dead ends: 457
[2021-11-02 12:24:25,278 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.72ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-11-02 12:24:25,279 INFO  L933         BasicCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6922.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.79ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7569.78ms IncrementalHoareTripleChecker+Time
[2021-11-02 12:24:25,280 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 1531 Unknown, 0 Unchecked, 18.79ms Time], IncrementalHoareTripleChecker [61 Valid, 1469 Invalid, 1 Unknown, 0 Unchecked, 7569.78ms Time]
[2021-11-02 12:24:25,281 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 457 states.
[2021-11-02 12:24:25,290 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 409.
[2021-11-02 12:24:25,291 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 409 states, 389 states have (on average 1.287917737789203) internal successors, (501), 408 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:25,293 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 501 transitions.
[2021-11-02 12:24:25,293 INFO  L78                 Accepts]: Start accepts. Automaton has 409 states and 501 transitions. Word has length 49
[2021-11-02 12:24:25,293 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-02 12:24:25,293 INFO  L470      AbstractCegarLoop]: Abstraction has 409 states and 501 transitions.
[2021-11-02 12:24:25,294 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:25,294 INFO  L276                IsEmpty]: Start isEmpty. Operand 409 states and 501 transitions.
[2021-11-02 12:24:25,295 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2021-11-02 12:24:25,295 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-02 12:24:25,295 INFO  L514         BasicCegarLoop]: trace histogram [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]
[2021-11-02 12:24:25,323 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2021-11-02 12:24:25,511 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-02 12:24:25,512 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] ===
[2021-11-02 12:24:25,512 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-02 12:24:25,512 INFO  L85        PathProgramCache]: Analyzing trace with hash -1884476390, now seen corresponding path program 1 times
[2021-11-02 12:24:25,513 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-02 12:24:25,513 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859774662]
[2021-11-02 12:24:25,513 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:25,513 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-02 12:24:25,627 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-02 12:24:25,628 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013421746]
[2021-11-02 12:24:25,628 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:25,628 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-02 12:24:25,629 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-11-02 12:24:25,632 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-02 12:24:25,634 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-11-02 12:24:26,402 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-02 12:24:26,416 INFO  L263         TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 9 conjunts are in the unsatisfiable core
[2021-11-02 12:24:26,420 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-02 12:24:26,998 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-02 12:24:26,998 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-02 12:24:26,999 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-02 12:24:26,999 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859774662]
[2021-11-02 12:24:26,999 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-02 12:24:26,999 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013421746]
[2021-11-02 12:24:26,999 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013421746] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-02 12:24:26,999 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-02 12:24:27,000 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-11-02 12:24:27,000 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299680297]
[2021-11-02 12:24:27,000 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2021-11-02 12:24:27,001 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-02 12:24:27,001 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2021-11-02 12:24:27,001 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2021-11-02 12:24:27,001 INFO  L87              Difference]: Start difference. First operand 409 states and 501 transitions. Second operand  has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:29,059 WARN  L515   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []
[2021-11-02 12:24:33,789 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-02 12:24:33,789 INFO  L93              Difference]: Finished difference Result 809 states and 982 transitions.
[2021-11-02 12:24:33,789 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2021-11-02 12:24:33,789 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49
[2021-11-02 12:24:33,790 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-02 12:24:33,792 INFO  L225             Difference]: With dead ends: 809
[2021-11-02 12:24:33,792 INFO  L226             Difference]: Without dead ends: 479
[2021-11-02 12:24:33,793 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 392.59ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132
[2021-11-02 12:24:33,794 INFO  L933         BasicCegarLoop]: 0 mSDtfsCounter, 1980 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5825.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.54ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6413.59ms IncrementalHoareTripleChecker+Time
[2021-11-02 12:24:33,794 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 0 Invalid, 1132 Unknown, 0 Unchecked, 32.54ms Time], IncrementalHoareTripleChecker [37 Valid, 1094 Invalid, 1 Unknown, 0 Unchecked, 6413.59ms Time]
[2021-11-02 12:24:33,796 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 479 states.
[2021-11-02 12:24:33,807 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 409.
[2021-11-02 12:24:33,808 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 409 states, 389 states have (on average 1.275064267352185) internal successors, (496), 408 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:33,809 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 496 transitions.
[2021-11-02 12:24:33,809 INFO  L78                 Accepts]: Start accepts. Automaton has 409 states and 496 transitions. Word has length 49
[2021-11-02 12:24:33,809 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-02 12:24:33,810 INFO  L470      AbstractCegarLoop]: Abstraction has 409 states and 496 transitions.
[2021-11-02 12:24:33,810 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-02 12:24:33,810 INFO  L276                IsEmpty]: Start isEmpty. Operand 409 states and 496 transitions.
[2021-11-02 12:24:33,811 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2021-11-02 12:24:33,811 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-02 12:24:33,812 INFO  L514         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-02 12:24:33,843 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-11-02 12:24:34,026 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-02 12:24:34,027 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] ===
[2021-11-02 12:24:34,027 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-02 12:24:34,027 INFO  L85        PathProgramCache]: Analyzing trace with hash -1740025118, now seen corresponding path program 1 times
[2021-11-02 12:24:34,027 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-02 12:24:34,028 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091888595]
[2021-11-02 12:24:34,028 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:34,028 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-02 12:24:34,112 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-02 12:24:34,112 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023357755]
[2021-11-02 12:24:34,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-02 12:24:34,112 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-02 12:24:34,113 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-11-02 12:24:34,114 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-02 12:24:34,115 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-11-02 12:34:06,650 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-02 12:34:06,962 INFO  L263         TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 262 conjunts are in the unsatisfiable core
[2021-11-02 12:34:06,976 INFO  L286         TraceCheckSpWp]: Computing forward predicates...