./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label38.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version dbf71c69
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label38.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ --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 32bit --witnessprinter.graph.data.programhash d34933a1b994b8e38d771072f952fdcb97af91d6a5c53e5f6f0249e635acf216
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-dbf71c6-m
[2022-10-17 10:55:33,869 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-10-17 10:55:33,871 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-10-17 10:55:33,903 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-10-17 10:55:33,904 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-10-17 10:55:33,905 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-10-17 10:55:33,907 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-10-17 10:55:33,910 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-10-17 10:55:33,913 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-10-17 10:55:33,915 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-10-17 10:55:33,916 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-10-17 10:55:33,918 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-10-17 10:55:33,919 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-10-17 10:55:33,920 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-10-17 10:55:33,922 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-10-17 10:55:33,924 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-10-17 10:55:33,926 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-10-17 10:55:33,927 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-10-17 10:55:33,930 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-10-17 10:55:33,933 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-10-17 10:55:33,936 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-10-17 10:55:33,938 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-10-17 10:55:33,940 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-10-17 10:55:33,941 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-10-17 10:55:33,947 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-10-17 10:55:33,947 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-10-17 10:55:33,948 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-10-17 10:55:33,949 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-10-17 10:55:33,950 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-10-17 10:55:33,952 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-10-17 10:55:33,952 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-10-17 10:55:33,954 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-10-17 10:55:33,955 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-10-17 10:55:33,956 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-10-17 10:55:33,958 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-10-17 10:55:33,958 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-10-17 10:55:33,960 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-10-17 10:55:33,960 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-10-17 10:55:33,961 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-10-17 10:55:33,962 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-10-17 10:55:33,963 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-10-17 10:55:33,965 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-10-17 10:55:34,004 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-10-17 10:55:34,005 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-10-17 10:55:34,006 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-10-17 10:55:34,006 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-10-17 10:55:34,007 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-10-17 10:55:34,008 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-10-17 10:55:34,009 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-10-17 10:55:34,009 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-10-17 10:55:34,010 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-10-17 10:55:34,010 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-10-17 10:55:34,011 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-10-17 10:55:34,011 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-10-17 10:55:34,012 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-10-17 10:55:34,012 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-10-17 10:55:34,012 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-10-17 10:55:34,013 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-10-17 10:55:34,013 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-10-17 10:55:34,014 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-10-17 10:55:34,014 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-10-17 10:55:34,015 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-10-17 10:55:34,015 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-10-17 10:55:34,015 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-10-17 10:55:34,016 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-10-17 10:55:34,016 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-10-17 10:55:34,017 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-17 10:55:34,017 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-10-17 10:55:34,018 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-10-17 10:55:34,018 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-10-17 10:55:34,018 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-10-17 10:55:34,019 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-10-17 10:55:34,019 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-10-17 10:55:34,019 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-10-17 10:55:34,020 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-10-17 10:55:34,020 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/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_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ
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 -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d34933a1b994b8e38d771072f952fdcb97af91d6a5c53e5f6f0249e635acf216
[2022-10-17 10:55:34,399 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-10-17 10:55:34,452 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-10-17 10:55:34,457 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-10-17 10:55:34,459 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-10-17 10:55:34,460 INFO  L275        PluginConnector]: CDTParser initialized
[2022-10-17 10:55:34,462 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem13_label38.c
[2022-10-17 10:55:34,558 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/data/338919812/08104f9f704d4c669dac9584db5d73c4/FLAGe28a59867
[2022-10-17 10:55:35,669 INFO  L306              CDTParser]: Found 1 translation units.
[2022-10-17 10:55:35,670 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/sv-benchmarks/c/eca-rers2012/Problem13_label38.c
[2022-10-17 10:55:35,708 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/data/338919812/08104f9f704d4c669dac9584db5d73c4/FLAGe28a59867
[2022-10-17 10:55:36,035 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/data/338919812/08104f9f704d4c669dac9584db5d73c4
[2022-10-17 10:55:36,039 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-10-17 10:55:36,043 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-10-17 10:55:36,046 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-10-17 10:55:36,047 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-10-17 10:55:36,051 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-10-17 10:55:36,052 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:55:36" (1/1) ...
[2022-10-17 10:55:36,053 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603a54ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:36, skipping insertion in model container
[2022-10-17 10:55:36,053 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:55:36" (1/1) ...
[2022-10-17 10:55:36,061 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-10-17 10:55:36,247 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-10-17 10:55:36,628 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_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/sv-benchmarks/c/eca-rers2012/Problem13_label38.c[8378,8391]
[2022-10-17 10:55:37,947 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-17 10:55:37,958 INFO  L203         MainTranslator]: Completed pre-run
[2022-10-17 10:55:38,007 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_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/sv-benchmarks/c/eca-rers2012/Problem13_label38.c[8378,8391]
[2022-10-17 10:55:38,755 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-17 10:55:38,788 INFO  L208         MainTranslator]: Completed translation
[2022-10-17 10:55:38,789 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38 WrapperNode
[2022-10-17 10:55:38,789 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-10-17 10:55:38,790 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-10-17 10:55:38,791 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-10-17 10:55:38,791 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-10-17 10:55:38,800 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:38,877 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:39,771 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583
[2022-10-17 10:55:39,772 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-10-17 10:55:39,773 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-10-17 10:55:39,773 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-10-17 10:55:39,773 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-10-17 10:55:39,785 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:39,786 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:39,992 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:39,993 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:40,477 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:40,518 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:40,583 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:40,604 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:40,789 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-10-17 10:55:40,791 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-10-17 10:55:40,793 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-10-17 10:55:40,793 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-10-17 10:55:40,794 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (1/1) ...
[2022-10-17 10:55:40,801 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-17 10:55:40,817 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/z3
[2022-10-17 10:55:40,835 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-10-17 10:55:40,856 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d6a54-6dfc-4fc8-87ad-bc75ba50e586/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-10-17 10:55:40,899 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-10-17 10:55:40,899 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-10-17 10:55:40,899 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-10-17 10:55:40,899 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-10-17 10:55:41,020 INFO  L235             CfgBuilder]: Building ICFG
[2022-10-17 10:55:41,023 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-10-17 10:55:47,811 INFO  L276             CfgBuilder]: Performing block encoding
[2022-10-17 10:55:47,843 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-10-17 10:55:47,843 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-10-17 10:55:47,847 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:55:47 BoogieIcfgContainer
[2022-10-17 10:55:47,848 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-10-17 10:55:47,852 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-10-17 10:55:47,853 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-10-17 10:55:47,856 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-10-17 10:55:47,857 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:55:36" (1/3) ...
[2022-10-17 10:55:47,857 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d8684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:55:47, skipping insertion in model container
[2022-10-17 10:55:47,858 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:55:38" (2/3) ...
[2022-10-17 10:55:47,858 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d8684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:55:47, skipping insertion in model container
[2022-10-17 10:55:47,859 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:55:47" (3/3) ...
[2022-10-17 10:55:47,860 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label38.c
[2022-10-17 10:55:47,881 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-10-17 10:55:47,881 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-10-17 10:55:47,987 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-10-17 10:55:48,008 INFO  L357      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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b4cfd3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-10-17 10:55:48,013 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-10-17 10:55:48,024 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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)
[2022-10-17 10:55:48,040 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2022-10-17 10:55:48,041 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:55:48,042 INFO  L195           NwaCegarLoop]: 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]
[2022-10-17 10:55:48,043 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:55:48,051 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:55:48,051 INFO  L85        PathProgramCache]: Analyzing trace with hash 118092897, now seen corresponding path program 1 times
[2022-10-17 10:55:48,061 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:55:48,062 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202762824]
[2022-10-17 10:55:48,062 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:55:48,063 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:55:48,202 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:55:48,591 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-17 10:55:48,592 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:55:48,593 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202762824]
[2022-10-17 10:55:48,594 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202762824] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:55:48,594 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:55:48,595 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:55:48,597 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480362391]
[2022-10-17 10:55:48,598 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:55:48,603 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:55:48,604 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:55:48,645 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:55:48,646 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:55:48,653 INFO  L87              Difference]: Start difference. First operand  has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 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)
[2022-10-17 10:55:54,635 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:55:54,636 INFO  L93              Difference]: Finished difference Result 3121 states and 5804 transitions.
[2022-10-17 10:55:54,637 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-10-17 10:55:54,639 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 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 59
[2022-10-17 10:55:54,639 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:55:54,671 INFO  L225             Difference]: With dead ends: 3121
[2022-10-17 10:55:54,672 INFO  L226             Difference]: Without dead ends: 1944
[2022-10-17 10:55:54,680 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:55:54,684 INFO  L413           NwaCegarLoop]: 438 mSDtfsCounter, 930 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time
[2022-10-17 10:55:54,685 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time]
[2022-10-17 10:55:54,710 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1944 states.
[2022-10-17 10:55:54,827 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873.
[2022-10-17 10:55:54,834 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 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)
[2022-10-17 10:55:54,846 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions.
[2022-10-17 10:55:54,848 INFO  L78                 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 59
[2022-10-17 10:55:54,849 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:55:54,849 INFO  L495      AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions.
[2022-10-17 10:55:54,850 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 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)
[2022-10-17 10:55:54,850 INFO  L276                IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions.
[2022-10-17 10:55:54,861 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 125
[2022-10-17 10:55:54,861 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:55:54,862 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:55:54,863 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-10-17 10:55:54,863 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:55:54,865 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:55:54,865 INFO  L85        PathProgramCache]: Analyzing trace with hash -1340601606, now seen corresponding path program 1 times
[2022-10-17 10:55:54,865 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:55:54,866 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872573961]
[2022-10-17 10:55:54,866 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:55:54,866 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:55:54,932 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:55:55,102 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-17 10:55:55,102 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:55:55,102 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872573961]
[2022-10-17 10:55:55,103 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872573961] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:55:55,103 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:55:55,103 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:55:55,103 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132712361]
[2022-10-17 10:55:55,103 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:55:55,105 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:55:55,105 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:55:55,106 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:55:55,106 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:55:55,106 INFO  L87              Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand  has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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)
[2022-10-17 10:55:59,938 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:55:59,939 INFO  L93              Difference]: Finished difference Result 5351 states and 9369 transitions.
[2022-10-17 10:55:59,939 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-10-17 10:55:59,939 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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 124
[2022-10-17 10:55:59,940 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:55:59,964 INFO  L225             Difference]: With dead ends: 5351
[2022-10-17 10:55:59,964 INFO  L226             Difference]: Without dead ends: 3480
[2022-10-17 10:55:59,973 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:55:59,976 INFO  L413           NwaCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2022-10-17 10:55:59,977 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2022-10-17 10:55:59,986 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3480 states.
[2022-10-17 10:56:00,070 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479.
[2022-10-17 10:56:00,079 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 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)
[2022-10-17 10:56:00,097 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions.
[2022-10-17 10:56:00,097 INFO  L78                 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 124
[2022-10-17 10:56:00,100 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:56:00,102 INFO  L495      AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions.
[2022-10-17 10:56:00,102 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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)
[2022-10-17 10:56:00,102 INFO  L276                IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions.
[2022-10-17 10:56:00,113 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 127
[2022-10-17 10:56:00,113 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:56:00,115 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:56:00,115 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-10-17 10:56:00,115 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:56:00,116 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:56:00,116 INFO  L85        PathProgramCache]: Analyzing trace with hash 473644895, now seen corresponding path program 1 times
[2022-10-17 10:56:00,116 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:56:00,117 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85752859]
[2022-10-17 10:56:00,117 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:56:00,117 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:56:00,204 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:56:00,424 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-17 10:56:00,424 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:56:00,424 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85752859]
[2022-10-17 10:56:00,425 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85752859] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:56:00,425 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:56:00,425 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:56:00,425 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792058350]
[2022-10-17 10:56:00,426 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:56:00,426 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-17 10:56:00,427 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:56:00,427 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-17 10:56:00,427 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-17 10:56:00,428 INFO  L87              Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand  has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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)