./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem05_label43.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 839c364b
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem05_label43.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa --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 ccdc64d386c0afcee2c613b34e5fe30388a4ae39c1b42105c78b960ee87cc482
--- Real Ultimate output ---
This is Ultimate 0.2.2-hotfix-svcomp22-839c364
[2021-12-06 21:57:04,538 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-12-06 21:57:04,540 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-12-06 21:57:04,562 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-12-06 21:57:04,562 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-12-06 21:57:04,563 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-12-06 21:57:04,565 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-12-06 21:57:04,566 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-12-06 21:57:04,568 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-12-06 21:57:04,569 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-12-06 21:57:04,569 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-12-06 21:57:04,570 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-12-06 21:57:04,571 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-12-06 21:57:04,572 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-12-06 21:57:04,573 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-12-06 21:57:04,574 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-12-06 21:57:04,575 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-12-06 21:57:04,576 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-12-06 21:57:04,577 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-12-06 21:57:04,579 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-12-06 21:57:04,580 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-12-06 21:57:04,582 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-12-06 21:57:04,583 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-12-06 21:57:04,583 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-12-06 21:57:04,586 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-12-06 21:57:04,586 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-12-06 21:57:04,587 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-12-06 21:57:04,587 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-12-06 21:57:04,588 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-12-06 21:57:04,589 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-12-06 21:57:04,589 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-12-06 21:57:04,590 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-12-06 21:57:04,590 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-12-06 21:57:04,591 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-12-06 21:57:04,592 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-12-06 21:57:04,592 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-12-06 21:57:04,593 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-12-06 21:57:04,593 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-12-06 21:57:04,593 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-12-06 21:57:04,594 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-12-06 21:57:04,594 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-12-06 21:57:04,595 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-12-06 21:57:04,620 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-12-06 21:57:04,620 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-12-06 21:57:04,621 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-12-06 21:57:04,621 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-12-06 21:57:04,622 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-12-06 21:57:04,622 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-12-06 21:57:04,622 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-12-06 21:57:04,622 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-12-06 21:57:04,622 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-12-06 21:57:04,623 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-12-06 21:57:04,623 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-12-06 21:57:04,623 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-12-06 21:57:04,623 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-12-06 21:57:04,623 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-12-06 21:57:04,623 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-12-06 21:57:04,624 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-12-06 21:57:04,624 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-12-06 21:57:04,624 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-12-06 21:57:04,624 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-12-06 21:57:04,624 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-12-06 21:57:04,624 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-12-06 21:57:04,624 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-12-06 21:57:04,624 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-12-06 21:57:04,625 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-12-06 21:57:04,625 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-06 21:57:04,625 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-12-06 21:57:04,625 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-12-06 21:57:04,625 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-12-06 21:57:04,625 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-12-06 21:57:04,625 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-12-06 21:57:04,625 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-12-06 21:57:04,626 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-12-06 21:57:04,626 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-12-06 21:57:04,626 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-12-06 21:57:04,626 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_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/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_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa
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 -> ccdc64d386c0afcee2c613b34e5fe30388a4ae39c1b42105c78b960ee87cc482
[2021-12-06 21:57:04,827 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-12-06 21:57:04,842 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-12-06 21:57:04,844 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-12-06 21:57:04,844 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-12-06 21:57:04,845 INFO  L275        PluginConnector]: CDTParser initialized
[2021-12-06 21:57:04,846 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem05_label43.c
[2021-12-06 21:57:04,897 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/data/08924777f/b99af04062114c08a2230c2c71049763/FLAGcaac6a857
[2021-12-06 21:57:05,588 INFO  L306              CDTParser]: Found 1 translation units.
[2021-12-06 21:57:05,588 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/sv-benchmarks/c/eca-rers2012/Problem05_label43.c
[2021-12-06 21:57:05,619 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/data/08924777f/b99af04062114c08a2230c2c71049763/FLAGcaac6a857
[2021-12-06 21:57:05,934 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/data/08924777f/b99af04062114c08a2230c2c71049763
[2021-12-06 21:57:05,941 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-12-06 21:57:05,946 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-12-06 21:57:05,950 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-12-06 21:57:05,951 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-12-06 21:57:05,961 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-12-06 21:57:05,963 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:57:05" (1/1) ...
[2021-12-06 21:57:05,966 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216808dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:05, skipping insertion in model container
[2021-12-06 21:57:05,966 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:57:05" (1/1) ...
[2021-12-06 21:57:05,987 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-12-06 21:57:06,170 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-12-06 21:57:07,517 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_0954a59c-21a9-4a43-a870-50397e50877e/sv-benchmarks/c/eca-rers2012/Problem05_label43.c[381336,381349]
[2021-12-06 21:57:07,533 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-06 21:57:07,539 INFO  L203         MainTranslator]: Completed pre-run
[2021-12-06 21:57:08,343 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_0954a59c-21a9-4a43-a870-50397e50877e/sv-benchmarks/c/eca-rers2012/Problem05_label43.c[381336,381349]
[2021-12-06 21:57:08,345 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-06 21:57:08,395 INFO  L208         MainTranslator]: Completed translation
[2021-12-06 21:57:08,395 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08 WrapperNode
[2021-12-06 21:57:08,396 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-12-06 21:57:08,396 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-12-06 21:57:08,396 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-12-06 21:57:08,396 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-12-06 21:57:08,402 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,458 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,700 INFO  L137                Inliner]: procedures = 21, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 12346
[2021-12-06 21:57:08,700 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-12-06 21:57:08,701 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-12-06 21:57:08,701 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-12-06 21:57:08,701 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-12-06 21:57:08,708 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,708 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,759 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,759 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,932 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,959 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:08,983 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:09,014 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-12-06 21:57:09,015 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-12-06 21:57:09,015 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-12-06 21:57:09,015 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-12-06 21:57:09,016 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (1/1) ...
[2021-12-06 21:57:09,022 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-06 21:57:09,031 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/z3
[2021-12-06 21:57:09,040 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-12-06 21:57:09,042 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-12-06 21:57:09,070 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-12-06 21:57:09,070 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-12-06 21:57:09,070 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-12-06 21:57:09,070 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-12-06 21:57:09,138 INFO  L236             CfgBuilder]: Building ICFG
[2021-12-06 21:57:09,140 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-12-06 21:57:13,409 INFO  L277             CfgBuilder]: Performing block encoding
[2021-12-06 21:57:13,435 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-12-06 21:57:13,436 INFO  L301             CfgBuilder]: Removed 1 assume(true) statements.
[2021-12-06 21:57:13,439 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:57:13 BoogieIcfgContainer
[2021-12-06 21:57:13,440 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-12-06 21:57:13,441 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-12-06 21:57:13,441 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-12-06 21:57:13,444 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-12-06 21:57:13,444 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:57:05" (1/3) ...
[2021-12-06 21:57:13,444 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1178238e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:57:13, skipping insertion in model container
[2021-12-06 21:57:13,444 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:08" (2/3) ...
[2021-12-06 21:57:13,445 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1178238e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:57:13, skipping insertion in model container
[2021-12-06 21:57:13,445 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:57:13" (3/3) ...
[2021-12-06 21:57:13,446 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem05_label43.c
[2021-12-06 21:57:13,449 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-12-06 21:57:13,450 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-12-06 21:57:13,492 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-12-06 21:57:13,497 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
[2021-12-06 21:57:13,497 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-12-06 21:57:13,540 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 2185 states, 2183 states have (on average 1.8708199725148877) internal successors, (4084), 2184 states have internal predecessors, (4084), 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)
[2021-12-06 21:57:13,628 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1686
[2021-12-06 21:57:13,628 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:13,630 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, 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, 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, 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, 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, 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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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1]
[2021-12-06 21:57:13,631 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:13,635 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:13,636 INFO  L85        PathProgramCache]: Analyzing trace with hash -1270841559, now seen corresponding path program 1 times
[2021-12-06 21:57:13,642 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:13,643 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434829007]
[2021-12-06 21:57:13,643 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:13,644 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:14,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:15,105 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 21:57:15,106 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:15,106 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434829007]
[2021-12-06 21:57:15,106 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434829007] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:15,106 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:15,107 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 21:57:15,108 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477657453]
[2021-12-06 21:57:15,109 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:15,114 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:15,115 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:15,134 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:15,135 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:15,141 INFO  L87              Difference]: Start difference. First operand  has 2185 states, 2183 states have (on average 1.8708199725148877) internal successors, (4084), 2184 states have internal predecessors, (4084), 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 561.6666666666666) internal successors, (1685), 2 states have internal predecessors, (1685), 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)
[2021-12-06 21:57:19,390 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:19,390 INFO  L93              Difference]: Finished difference Result 6263 states and 11838 transitions.
[2021-12-06 21:57:19,391 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:19,392 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 561.6666666666666) internal successors, (1685), 2 states have internal predecessors, (1685), 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 1685
[2021-12-06 21:57:19,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:19,429 INFO  L225             Difference]: With dead ends: 6263
[2021-12-06 21:57:19,429 INFO  L226             Difference]: Without dead ends: 4014
[2021-12-06 21:57:19,436 INFO  L932         BasicCegarLoop]: 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
[2021-12-06 21:57:19,438 INFO  L933         BasicCegarLoop]: 1397 mSDtfsCounter, 347 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 5307 mSolverCounterSat, 2416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 7723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2416 IncrementalHoareTripleChecker+Valid, 5307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:19,439 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 1623 Invalid, 7723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2416 Valid, 5307 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time]
[2021-12-06 21:57:19,456 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4014 states.
[2021-12-06 21:57:19,547 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 3931.
[2021-12-06 21:57:19,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3931 states, 3930 states have (on average 1.7063613231552164) internal successors, (6706), 3930 states have internal predecessors, (6706), 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)
[2021-12-06 21:57:19,566 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 6706 transitions.
[2021-12-06 21:57:19,567 INFO  L78                 Accepts]: Start accepts. Automaton has 3931 states and 6706 transitions. Word has length 1685
[2021-12-06 21:57:19,569 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:19,570 INFO  L470      AbstractCegarLoop]: Abstraction has 3931 states and 6706 transitions.
[2021-12-06 21:57:19,570 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 561.6666666666666) internal successors, (1685), 2 states have internal predecessors, (1685), 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)
[2021-12-06 21:57:19,571 INFO  L276                IsEmpty]: Start isEmpty. Operand 3931 states and 6706 transitions.
[2021-12-06 21:57:19,614 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1694
[2021-12-06 21:57:19,614 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:19,615 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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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, 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, 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, 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, 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, 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]
[2021-12-06 21:57:19,616 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-12-06 21:57:19,616 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:19,616 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:19,617 INFO  L85        PathProgramCache]: Analyzing trace with hash 1646750775, now seen corresponding path program 1 times
[2021-12-06 21:57:19,617 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:19,617 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577754706]
[2021-12-06 21:57:19,618 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:19,618 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:19,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:20,369 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 21:57:20,369 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:20,369 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577754706]
[2021-12-06 21:57:20,370 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577754706] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:20,370 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:20,370 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 21:57:20,371 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093003520]
[2021-12-06 21:57:20,371 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:20,375 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:20,375 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:20,375 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:20,376 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:20,377 INFO  L87              Difference]: Start difference. First operand 3931 states and 6706 transitions. Second operand  has 3 states, 3 states have (on average 564.3333333333334) internal successors, (1693), 2 states have internal predecessors, (1693), 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)
[2021-12-06 21:57:24,610 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:24,611 INFO  L93              Difference]: Finished difference Result 11291 states and 19411 transitions.
[2021-12-06 21:57:24,611 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:24,612 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 564.3333333333334) internal successors, (1693), 2 states have internal predecessors, (1693), 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 1693
[2021-12-06 21:57:24,612 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:24,640 INFO  L225             Difference]: With dead ends: 11291
[2021-12-06 21:57:24,640 INFO  L226             Difference]: Without dead ends: 7362
[2021-12-06 21:57:24,643 INFO  L932         BasicCegarLoop]: 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
[2021-12-06 21:57:24,645 INFO  L933         BasicCegarLoop]: 1826 mSDtfsCounter, 2355 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4839 mSolverCounterSat, 2060 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2355 SdHoareTripleChecker+Valid, 2022 SdHoareTripleChecker+Invalid, 6899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2060 IncrementalHoareTripleChecker+Valid, 4839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:24,645 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2355 Valid, 2022 Invalid, 6899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2060 Valid, 4839 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time]
[2021-12-06 21:57:24,652 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7362 states.
[2021-12-06 21:57:24,741 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 7361.
[2021-12-06 21:57:24,752 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7361 states, 7360 states have (on average 1.5313858695652174) internal successors, (11271), 7360 states have internal predecessors, (11271), 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)
[2021-12-06 21:57:24,764 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11271 transitions.
[2021-12-06 21:57:24,765 INFO  L78                 Accepts]: Start accepts. Automaton has 7361 states and 11271 transitions. Word has length 1693
[2021-12-06 21:57:24,765 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:24,765 INFO  L470      AbstractCegarLoop]: Abstraction has 7361 states and 11271 transitions.
[2021-12-06 21:57:24,766 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 564.3333333333334) internal successors, (1693), 2 states have internal predecessors, (1693), 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)
[2021-12-06 21:57:24,766 INFO  L276                IsEmpty]: Start isEmpty. Operand 7361 states and 11271 transitions.
[2021-12-06 21:57:24,793 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1714
[2021-12-06 21:57:24,794 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:24,795 INFO  L514         BasicCegarLoop]: 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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]
[2021-12-06 21:57:24,795 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-12-06 21:57:24,795 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:24,796 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:24,796 INFO  L85        PathProgramCache]: Analyzing trace with hash -292616073, now seen corresponding path program 1 times
[2021-12-06 21:57:24,796 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:24,796 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487346261]
[2021-12-06 21:57:24,797 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:24,797 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:24,919 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:25,299 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 21:57:25,299 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:25,299 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487346261]
[2021-12-06 21:57:25,300 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487346261] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:25,300 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:25,300 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 21:57:25,300 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664645430]
[2021-12-06 21:57:25,300 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:25,302 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:25,302 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:25,302 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:25,302 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:25,303 INFO  L87              Difference]: Start difference. First operand 7361 states and 11271 transitions. Second operand  has 3 states, 3 states have (on average 571.0) internal successors, (1713), 2 states have internal predecessors, (1713), 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)
[2021-12-06 21:57:28,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:28,551 INFO  L93              Difference]: Finished difference Result 18117 states and 27085 transitions.
[2021-12-06 21:57:28,551 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:28,552 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 571.0) internal successors, (1713), 2 states have internal predecessors, (1713), 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 1713
[2021-12-06 21:57:28,552 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:28,589 INFO  L225             Difference]: With dead ends: 18117
[2021-12-06 21:57:28,589 INFO  L226             Difference]: Without dead ends: 10758
[2021-12-06 21:57:28,595 INFO  L932         BasicCegarLoop]: 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
[2021-12-06 21:57:28,597 INFO  L933         BasicCegarLoop]: 1078 mSDtfsCounter, 3171 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3171 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 5981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:28,597 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3171 Valid, 1164 Invalid, 5981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1208 Valid, 4773 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2021-12-06 21:57:28,607 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10758 states.
[2021-12-06 21:57:28,709 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 10758.
[2021-12-06 21:57:28,725 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10758 states, 10757 states have (on average 1.3355954262340801) internal successors, (14367), 10757 states have internal predecessors, (14367), 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)
[2021-12-06 21:57:28,742 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 14367 transitions.
[2021-12-06 21:57:28,742 INFO  L78                 Accepts]: Start accepts. Automaton has 10758 states and 14367 transitions. Word has length 1713
[2021-12-06 21:57:28,742 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:28,742 INFO  L470      AbstractCegarLoop]: Abstraction has 10758 states and 14367 transitions.
[2021-12-06 21:57:28,744 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 571.0) internal successors, (1713), 2 states have internal predecessors, (1713), 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)
[2021-12-06 21:57:28,744 INFO  L276                IsEmpty]: Start isEmpty. Operand 10758 states and 14367 transitions.
[2021-12-06 21:57:28,777 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1722
[2021-12-06 21:57:28,777 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:28,778 INFO  L514         BasicCegarLoop]: 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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]
[2021-12-06 21:57:28,778 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-12-06 21:57:28,778 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:28,779 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:28,779 INFO  L85        PathProgramCache]: Analyzing trace with hash 1579520850, now seen corresponding path program 1 times
[2021-12-06 21:57:28,779 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:28,780 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242047518]
[2021-12-06 21:57:28,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:28,780 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:28,906 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:29,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 21:57:29,249 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:29,249 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242047518]
[2021-12-06 21:57:29,249 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242047518] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:29,249 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:29,249 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 21:57:29,250 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443853403]
[2021-12-06 21:57:29,250 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:29,251 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:29,251 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:29,252 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:29,252 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:29,252 INFO  L87              Difference]: Start difference. First operand 10758 states and 14367 transitions. Second operand  has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 2 states have internal predecessors, (1721), 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)
[2021-12-06 21:57:33,155 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:33,155 INFO  L93              Difference]: Finished difference Result 31738 states and 42394 transitions.
[2021-12-06 21:57:33,156 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:33,156 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 2 states have internal predecessors, (1721), 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 1721
[2021-12-06 21:57:33,156 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:33,193 INFO  L225             Difference]: With dead ends: 31738
[2021-12-06 21:57:33,193 INFO  L226             Difference]: Without dead ends: 20982
[2021-12-06 21:57:33,203 INFO  L932         BasicCegarLoop]: 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
[2021-12-06 21:57:33,204 INFO  L933         BasicCegarLoop]: 1241 mSDtfsCounter, 2223 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4946 mSolverCounterSat, 2574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2223 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 7520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2574 IncrementalHoareTripleChecker+Valid, 4946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:33,205 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2223 Valid, 1390 Invalid, 7520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2574 Valid, 4946 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time]
[2021-12-06 21:57:33,222 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20982 states.
[2021-12-06 21:57:33,401 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20982 to 20965.
[2021-12-06 21:57:33,418 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20965 states, 20964 states have (on average 1.2765216561724861) internal successors, (26761), 20964 states have internal predecessors, (26761), 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)
[2021-12-06 21:57:33,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20965 states to 20965 states and 26761 transitions.
[2021-12-06 21:57:33,439 INFO  L78                 Accepts]: Start accepts. Automaton has 20965 states and 26761 transitions. Word has length 1721
[2021-12-06 21:57:33,440 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:33,440 INFO  L470      AbstractCegarLoop]: Abstraction has 20965 states and 26761 transitions.
[2021-12-06 21:57:33,440 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 2 states have internal predecessors, (1721), 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)
[2021-12-06 21:57:33,440 INFO  L276                IsEmpty]: Start isEmpty. Operand 20965 states and 26761 transitions.
[2021-12-06 21:57:33,478 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1795
[2021-12-06 21:57:33,478 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:33,480 INFO  L514         BasicCegarLoop]: 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, 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, 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, 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, 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, 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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]
[2021-12-06 21:57:33,480 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-12-06 21:57:33,480 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:33,480 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:33,481 INFO  L85        PathProgramCache]: Analyzing trace with hash 1781443895, now seen corresponding path program 1 times
[2021-12-06 21:57:33,481 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:33,481 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888527777]
[2021-12-06 21:57:33,482 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:33,482 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:33,695 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:34,512 INFO  L134       CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 21:57:34,512 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:34,512 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888527777]
[2021-12-06 21:57:34,513 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888527777] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:34,513 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:34,513 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:57:34,513 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141570465]
[2021-12-06 21:57:34,513 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:34,515 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:34,515 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:34,515 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:34,515 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:34,516 INFO  L87              Difference]: Start difference. First operand 20965 states and 26761 transitions. Second operand  has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 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)
[2021-12-06 21:57:38,591 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:38,591 INFO  L93              Difference]: Finished difference Result 52218 states and 67380 transitions.
[2021-12-06 21:57:38,592 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:38,592 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 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 1794
[2021-12-06 21:57:38,594 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:38,636 INFO  L225             Difference]: With dead ends: 52218
[2021-12-06 21:57:38,637 INFO  L226             Difference]: Without dead ends: 31255
[2021-12-06 21:57:38,653 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:38,654 INFO  L933         BasicCegarLoop]: 1223 mSDtfsCounter, 402 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 5363 mSolverCounterSat, 2489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 7852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2489 IncrementalHoareTripleChecker+Valid, 5363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:38,654 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1388 Invalid, 7852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2489 Valid, 5363 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time]
[2021-12-06 21:57:38,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31255 states.
[2021-12-06 21:57:38,911 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31255 to 31164.
[2021-12-06 21:57:38,934 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31164 states, 31163 states have (on average 1.276096653082181) internal successors, (39767), 31163 states have internal predecessors, (39767), 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)
[2021-12-06 21:57:38,966 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31164 states to 31164 states and 39767 transitions.
[2021-12-06 21:57:38,966 INFO  L78                 Accepts]: Start accepts. Automaton has 31164 states and 39767 transitions. Word has length 1794
[2021-12-06 21:57:38,967 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:38,967 INFO  L470      AbstractCegarLoop]: Abstraction has 31164 states and 39767 transitions.
[2021-12-06 21:57:38,967 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 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)
[2021-12-06 21:57:38,968 INFO  L276                IsEmpty]: Start isEmpty. Operand 31164 states and 39767 transitions.
[2021-12-06 21:57:39,015 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1875
[2021-12-06 21:57:39,015 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:39,016 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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]
[2021-12-06 21:57:39,016 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-12-06 21:57:39,016 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:39,017 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:39,017 INFO  L85        PathProgramCache]: Analyzing trace with hash -1521425173, now seen corresponding path program 1 times
[2021-12-06 21:57:39,017 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:39,017 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566670365]
[2021-12-06 21:57:39,018 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:39,018 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:39,142 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:39,572 INFO  L134       CoverageAnalysis]: Checked inductivity of 257 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked.
[2021-12-06 21:57:39,572 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:39,572 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566670365]
[2021-12-06 21:57:39,572 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566670365] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:39,572 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:39,573 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 21:57:39,573 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375193015]
[2021-12-06 21:57:39,573 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:39,574 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:39,575 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:39,575 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:39,575 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:39,575 INFO  L87              Difference]: Start difference. First operand 31164 states and 39767 transitions. Second operand  has 3 states, 3 states have (on average 585.3333333333334) internal successors, (1756), 2 states have internal predecessors, (1756), 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)
[2021-12-06 21:57:43,596 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:43,596 INFO  L93              Difference]: Finished difference Result 92896 states and 118529 transitions.
[2021-12-06 21:57:43,597 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:43,597 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 585.3333333333334) internal successors, (1756), 2 states have internal predecessors, (1756), 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 1874
[2021-12-06 21:57:43,597 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:43,664 INFO  L225             Difference]: With dead ends: 92896
[2021-12-06 21:57:43,664 INFO  L226             Difference]: Without dead ends: 61734
[2021-12-06 21:57:43,688 INFO  L932         BasicCegarLoop]: 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
[2021-12-06 21:57:43,688 INFO  L933         BasicCegarLoop]: 2031 mSDtfsCounter, 1787 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 5783 mSolverCounterSat, 1400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1787 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 7183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1400 IncrementalHoareTripleChecker+Valid, 5783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:43,689 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1787 Valid, 2326 Invalid, 7183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1400 Valid, 5783 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2021-12-06 21:57:43,731 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61734 states.
[2021-12-06 21:57:44,150 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61734 to 61726.
[2021-12-06 21:57:44,186 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 61726 states, 61725 states have (on average 1.191737545565006) internal successors, (73560), 61725 states have internal predecessors, (73560), 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)
[2021-12-06 21:57:44,249 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 73560 transitions.
[2021-12-06 21:57:44,249 INFO  L78                 Accepts]: Start accepts. Automaton has 61726 states and 73560 transitions. Word has length 1874
[2021-12-06 21:57:44,249 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:44,249 INFO  L470      AbstractCegarLoop]: Abstraction has 61726 states and 73560 transitions.
[2021-12-06 21:57:44,250 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 585.3333333333334) internal successors, (1756), 2 states have internal predecessors, (1756), 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)
[2021-12-06 21:57:44,250 INFO  L276                IsEmpty]: Start isEmpty. Operand 61726 states and 73560 transitions.
[2021-12-06 21:57:44,309 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1911
[2021-12-06 21:57:44,309 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:44,311 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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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, 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, 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, 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, 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, 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]
[2021-12-06 21:57:44,311 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2021-12-06 21:57:44,311 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:44,311 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:44,312 INFO  L85        PathProgramCache]: Analyzing trace with hash -871215606, now seen corresponding path program 1 times
[2021-12-06 21:57:44,312 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:44,312 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506494169]
[2021-12-06 21:57:44,312 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:44,312 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:44,438 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:44,920 INFO  L134       CoverageAnalysis]: Checked inductivity of 329 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked.
[2021-12-06 21:57:44,920 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:44,920 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506494169]
[2021-12-06 21:57:44,921 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506494169] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:44,921 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:44,921 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 21:57:44,921 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607779821]
[2021-12-06 21:57:44,921 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:44,923 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:44,923 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:44,924 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:44,924 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:44,924 INFO  L87              Difference]: Start difference. First operand 61726 states and 73560 transitions. Second operand  has 3 states, 3 states have (on average 597.3333333333334) internal successors, (1792), 2 states have internal predecessors, (1792), 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)
[2021-12-06 21:57:48,846 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:48,846 INFO  L93              Difference]: Finished difference Result 177789 states and 212424 transitions.
[2021-12-06 21:57:48,847 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:48,847 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 597.3333333333334) internal successors, (1792), 2 states have internal predecessors, (1792), 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 1910
[2021-12-06 21:57:48,847 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:48,957 INFO  L225             Difference]: With dead ends: 177789
[2021-12-06 21:57:48,957 INFO  L226             Difference]: Without dead ends: 116065
[2021-12-06 21:57:48,978 INFO  L932         BasicCegarLoop]: 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
[2021-12-06 21:57:48,979 INFO  L933         BasicCegarLoop]: 1701 mSDtfsCounter, 2419 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4494 mSolverCounterSat, 2361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2419 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 6855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2361 IncrementalHoareTripleChecker+Valid, 4494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:48,979 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2419 Valid, 1839 Invalid, 6855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2361 Valid, 4494 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time]
[2021-12-06 21:57:49,052 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 116065 states.
[2021-12-06 21:57:49,833 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 116065 to 104166.
[2021-12-06 21:57:49,892 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 104166 states, 104165 states have (on average 1.1523928382854125) internal successors, (120039), 104165 states have internal predecessors, (120039), 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)
[2021-12-06 21:57:50,007 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 104166 states to 104166 states and 120039 transitions.
[2021-12-06 21:57:50,007 INFO  L78                 Accepts]: Start accepts. Automaton has 104166 states and 120039 transitions. Word has length 1910
[2021-12-06 21:57:50,008 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:50,008 INFO  L470      AbstractCegarLoop]: Abstraction has 104166 states and 120039 transitions.
[2021-12-06 21:57:50,008 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 597.3333333333334) internal successors, (1792), 2 states have internal predecessors, (1792), 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)
[2021-12-06 21:57:50,008 INFO  L276                IsEmpty]: Start isEmpty. Operand 104166 states and 120039 transitions.
[2021-12-06 21:57:50,086 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1927
[2021-12-06 21:57:50,086 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:50,087 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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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]
[2021-12-06 21:57:50,087 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2021-12-06 21:57:50,087 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:50,088 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:50,088 INFO  L85        PathProgramCache]: Analyzing trace with hash 633428131, now seen corresponding path program 1 times
[2021-12-06 21:57:50,088 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:50,088 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24225716]
[2021-12-06 21:57:50,089 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:50,089 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:50,213 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:50,742 INFO  L134       CoverageAnalysis]: Checked inductivity of 423 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked.
[2021-12-06 21:57:50,742 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:50,742 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24225716]
[2021-12-06 21:57:50,742 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24225716] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:50,742 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:50,743 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:57:50,743 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584827431]
[2021-12-06 21:57:50,743 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:50,744 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:50,745 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:50,745 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:50,745 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:50,745 INFO  L87              Difference]: Start difference. First operand 104166 states and 120039 transitions. Second operand  has 3 states, 3 states have (on average 592.3333333333334) internal successors, (1777), 3 states have internal predecessors, (1777), 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)
[2021-12-06 21:57:55,100 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:57:55,100 INFO  L93              Difference]: Finished difference Result 257580 states and 299153 transitions.
[2021-12-06 21:57:55,101 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:57:55,101 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 592.3333333333334) internal successors, (1777), 3 states have internal predecessors, (1777), 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 1926
[2021-12-06 21:57:55,101 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:57:55,243 INFO  L225             Difference]: With dead ends: 257580
[2021-12-06 21:57:55,243 INFO  L226             Difference]: Without dead ends: 153416
[2021-12-06 21:57:55,282 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:55,283 INFO  L933         BasicCegarLoop]: 3604 mSDtfsCounter, 2068 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 4776 mSolverCounterSat, 2201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 3838 SdHoareTripleChecker+Invalid, 6977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2201 IncrementalHoareTripleChecker+Valid, 4776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2021-12-06 21:57:55,283 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2068 Valid, 3838 Invalid, 6977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2201 Valid, 4776 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2021-12-06 21:57:55,383 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 153416 states.
[2021-12-06 21:57:56,419 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 153416 to 146613.
[2021-12-06 21:57:56,476 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 146613 states, 146612 states have (on average 1.1271246555534336) internal successors, (165250), 146612 states have internal predecessors, (165250), 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)
[2021-12-06 21:57:56,625 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 146613 states to 146613 states and 165250 transitions.
[2021-12-06 21:57:56,625 INFO  L78                 Accepts]: Start accepts. Automaton has 146613 states and 165250 transitions. Word has length 1926
[2021-12-06 21:57:56,625 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:57:56,625 INFO  L470      AbstractCegarLoop]: Abstraction has 146613 states and 165250 transitions.
[2021-12-06 21:57:56,626 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 592.3333333333334) internal successors, (1777), 3 states have internal predecessors, (1777), 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)
[2021-12-06 21:57:56,626 INFO  L276                IsEmpty]: Start isEmpty. Operand 146613 states and 165250 transitions.
[2021-12-06 21:57:56,854 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2056
[2021-12-06 21:57:56,855 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:57:56,856 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 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, 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, 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, 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[2021-12-06 21:57:56,856 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2021-12-06 21:57:56,856 INFO  L402      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:57:56,857 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:57:56,857 INFO  L85        PathProgramCache]: Analyzing trace with hash -155933261, now seen corresponding path program 1 times
[2021-12-06 21:57:56,857 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:57:56,857 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634243755]
[2021-12-06 21:57:56,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:57:56,858 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:57:57,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:57:57,634 INFO  L134       CoverageAnalysis]: Checked inductivity of 795 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked.
[2021-12-06 21:57:57,634 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:57:57,634 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634243755]
[2021-12-06 21:57:57,634 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634243755] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:57:57,634 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:57:57,634 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:57:57,634 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841194641]
[2021-12-06 21:57:57,634 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:57:57,636 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:57:57,636 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:57:57,636 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:57:57,636 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:57:57,637 INFO  L87              Difference]: Start difference. First operand 146613 states and 165250 transitions. Second operand  has 3 states, 3 states have (on average 634.3333333333334) internal successors, (1903), 3 states have internal predecessors, (1903), 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)
[2021-12-06 21:58:02,201 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:02,202 INFO  L93              Difference]: Finished difference Result 298397 states and 335791 transitions.
[2021-12-06 21:58:02,202 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:58:02,202 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 634.3333333333334) internal successors, (1903), 3 states have internal predecessors, (1903), 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 2055
[2021-12-06 21:58:02,202 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:02,357 INFO  L225             Difference]: With dead ends: 298397
[2021-12-06 21:58:02,358 INFO  L226             Difference]: Without dead ends: 150073
[2021-12-06 21:58:02,417 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:02,417 INFO  L933         BasicCegarLoop]: 3963 mSDtfsCounter, 1759 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 6279 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 4184 SdHoareTripleChecker+Invalid, 7171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 6279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:02,418 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1759 Valid, 4184 Invalid, 7171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 6279 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time]
[2021-12-06 21:58:02,524 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 150073 states.
[2021-12-06 21:58:03,516 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 150073 to 150003.
[2021-12-06 21:58:03,602 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 150003 states, 150002 states have (on average 1.105271929707604) internal successors, (165793), 150002 states have internal predecessors, (165793), 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)
[2021-12-06 21:58:03,852 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 150003 states to 150003 states and 165793 transitions.
[2021-12-06 21:58:03,852 INFO  L78                 Accepts]: Start accepts. Automaton has 150003 states and 165793 transitions. Word has length 2055
[2021-12-06 21:58:03,853 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:58:03,853 INFO  L470      AbstractCegarLoop]: Abstraction has 150003 states and 165793 transitions.
[2021-12-06 21:58:03,853 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 634.3333333333334) internal successors, (1903), 3 states have internal predecessors, (1903), 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)
[2021-12-06 21:58:03,853 INFO  L276                IsEmpty]: Start isEmpty. Operand 150003 states and 165793 transitions.
[2021-12-06 21:58:03,966 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2096
[2021-12-06 21:58:03,966 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:58:03,967 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-12-06 21:58:03,967 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2021-12-06 21:58:03,968 INFO  L402      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:58:03,968 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:58:03,968 INFO  L85        PathProgramCache]: Analyzing trace with hash 1407957960, now seen corresponding path program 1 times
[2021-12-06 21:58:03,968 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:58:03,969 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715736190]
[2021-12-06 21:58:03,969 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:58:03,969 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:58:04,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:58:04,823 INFO  L134       CoverageAnalysis]: Checked inductivity of 851 backedges. 697 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked.
[2021-12-06 21:58:04,824 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:58:04,824 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715736190]
[2021-12-06 21:58:04,824 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715736190] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:58:04,824 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:58:04,824 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:58:04,825 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238756823]
[2021-12-06 21:58:04,825 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:58:04,826 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:58:04,827 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:58:04,827 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:58:04,827 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:04,827 INFO  L87              Difference]: Start difference. First operand 150003 states and 165793 transitions. Second operand  has 3 states, 3 states have (on average 647.6666666666666) internal successors, (1943), 3 states have internal predecessors, (1943), 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)
[2021-12-06 21:58:09,437 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:09,437 INFO  L93              Difference]: Finished difference Result 357750 states and 394325 transitions.
[2021-12-06 21:58:09,437 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:58:09,438 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 647.6666666666666) internal successors, (1943), 3 states have internal predecessors, (1943), 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 2095
[2021-12-06 21:58:09,438 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:09,660 INFO  L225             Difference]: With dead ends: 357750
[2021-12-06 21:58:09,660 INFO  L226             Difference]: Without dead ends: 207748
[2021-12-06 21:58:09,736 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:09,737 INFO  L933         BasicCegarLoop]: 960 mSDtfsCounter, 2111 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 5077 mSolverCounterSat, 2130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2111 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 7207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2130 IncrementalHoareTripleChecker+Valid, 5077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:09,737 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2111 Valid, 1057 Invalid, 7207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2130 Valid, 5077 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2021-12-06 21:58:09,901 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 207748 states.
[2021-12-06 21:58:11,400 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 207748 to 200936.
[2021-12-06 21:58:11,515 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 200936 states, 200935 states have (on average 1.0907208798865304) internal successors, (219164), 200935 states have internal predecessors, (219164), 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)
[2021-12-06 21:58:11,845 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 200936 states to 200936 states and 219164 transitions.
[2021-12-06 21:58:11,845 INFO  L78                 Accepts]: Start accepts. Automaton has 200936 states and 219164 transitions. Word has length 2095
[2021-12-06 21:58:11,845 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:58:11,846 INFO  L470      AbstractCegarLoop]: Abstraction has 200936 states and 219164 transitions.
[2021-12-06 21:58:11,846 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 647.6666666666666) internal successors, (1943), 3 states have internal predecessors, (1943), 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)
[2021-12-06 21:58:11,846 INFO  L276                IsEmpty]: Start isEmpty. Operand 200936 states and 219164 transitions.
[2021-12-06 21:58:12,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2161
[2021-12-06 21:58:12,117 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:58:12,118 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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]
[2021-12-06 21:58:12,119 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2021-12-06 21:58:12,119 INFO  L402      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:58:12,119 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:58:12,120 INFO  L85        PathProgramCache]: Analyzing trace with hash -430342680, now seen corresponding path program 1 times
[2021-12-06 21:58:12,120 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:58:12,120 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465946497]
[2021-12-06 21:58:12,121 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:58:12,121 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:58:12,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:58:12,950 INFO  L134       CoverageAnalysis]: Checked inductivity of 652 backedges. 617 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked.
[2021-12-06 21:58:12,950 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:58:12,950 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465946497]
[2021-12-06 21:58:12,950 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465946497] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:58:12,951 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:58:12,951 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:58:12,951 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661910365]
[2021-12-06 21:58:12,951 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:58:12,953 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:58:12,953 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:58:12,954 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:58:12,954 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:12,954 INFO  L87              Difference]: Start difference. First operand 200936 states and 219164 transitions. Second operand  has 3 states, 3 states have (on average 708.6666666666666) internal successors, (2126), 3 states have internal predecessors, (2126), 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)
[2021-12-06 21:58:17,196 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:17,196 INFO  L93              Difference]: Finished difference Result 408668 states and 445201 transitions.
[2021-12-06 21:58:17,196 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:58:17,197 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 708.6666666666666) internal successors, (2126), 3 states have internal predecessors, (2126), 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 2160
[2021-12-06 21:58:17,197 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:17,419 INFO  L225             Difference]: With dead ends: 408668
[2021-12-06 21:58:17,419 INFO  L226             Difference]: Without dead ends: 204324
[2021-12-06 21:58:17,489 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:17,490 INFO  L933         BasicCegarLoop]: 2854 mSDtfsCounter, 2183 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4835 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 6351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 4835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:17,490 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2183 Valid, 2959 Invalid, 6351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1516 Valid, 4835 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2021-12-06 21:58:17,643 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 204324 states.
[2021-12-06 21:58:19,059 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 204324 to 200918.
[2021-12-06 21:58:19,170 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 200918 states, 200917 states have (on average 1.0712533036029803) internal successors, (215233), 200917 states have internal predecessors, (215233), 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)
[2021-12-06 21:58:19,530 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 200918 states to 200918 states and 215233 transitions.
[2021-12-06 21:58:19,530 INFO  L78                 Accepts]: Start accepts. Automaton has 200918 states and 215233 transitions. Word has length 2160
[2021-12-06 21:58:19,531 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:58:19,531 INFO  L470      AbstractCegarLoop]: Abstraction has 200918 states and 215233 transitions.
[2021-12-06 21:58:19,531 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 708.6666666666666) internal successors, (2126), 3 states have internal predecessors, (2126), 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)
[2021-12-06 21:58:19,531 INFO  L276                IsEmpty]: Start isEmpty. Operand 200918 states and 215233 transitions.
[2021-12-06 21:58:19,786 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2246
[2021-12-06 21:58:19,786 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:58:19,788 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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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, 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, 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, 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, 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, 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]
[2021-12-06 21:58:19,788 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2021-12-06 21:58:19,788 INFO  L402      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:58:19,788 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:58:19,789 INFO  L85        PathProgramCache]: Analyzing trace with hash -798644977, now seen corresponding path program 1 times
[2021-12-06 21:58:19,789 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:58:19,789 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957648117]
[2021-12-06 21:58:19,789 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:58:19,789 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:58:19,947 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:58:20,660 INFO  L134       CoverageAnalysis]: Checked inductivity of 676 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked.
[2021-12-06 21:58:20,660 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:58:20,661 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957648117]
[2021-12-06 21:58:20,661 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957648117] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:58:20,661 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:58:20,661 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 21:58:20,661 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737291449]
[2021-12-06 21:58:20,661 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:58:20,663 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:58:20,663 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:58:20,664 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:58:20,664 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:20,664 INFO  L87              Difference]: Start difference. First operand 200918 states and 215233 transitions. Second operand  has 3 states, 3 states have (on average 709.0) internal successors, (2127), 2 states have internal predecessors, (2127), 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)
[2021-12-06 21:58:24,749 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:24,750 INFO  L93              Difference]: Finished difference Result 435798 states and 466277 transitions.
[2021-12-06 21:58:24,750 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:58:24,750 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 709.0) internal successors, (2127), 2 states have internal predecessors, (2127), 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 2245
[2021-12-06 21:58:24,751 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:25,069 INFO  L225             Difference]: With dead ends: 435798
[2021-12-06 21:58:25,070 INFO  L226             Difference]: Without dead ends: 233143
[2021-12-06 21:58:25,102 INFO  L932         BasicCegarLoop]: 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
[2021-12-06 21:58:25,103 INFO  L933         BasicCegarLoop]: 1862 mSDtfsCounter, 1682 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4464 mSolverCounterSat, 1302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 5766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1302 IncrementalHoareTripleChecker+Valid, 4464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:25,103 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2037 Invalid, 5766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1302 Valid, 4464 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time]
[2021-12-06 21:58:25,229 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 233143 states.
[2021-12-06 21:58:26,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 233143 to 226350.
[2021-12-06 21:58:26,987 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 226350 states, 226349 states have (on average 1.036218406089711) internal successors, (234547), 226349 states have internal predecessors, (234547), 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)
[2021-12-06 21:58:27,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 226350 states to 226350 states and 234547 transitions.
[2021-12-06 21:58:27,261 INFO  L78                 Accepts]: Start accepts. Automaton has 226350 states and 234547 transitions. Word has length 2245
[2021-12-06 21:58:27,261 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:58:27,262 INFO  L470      AbstractCegarLoop]: Abstraction has 226350 states and 234547 transitions.
[2021-12-06 21:58:27,262 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 709.0) internal successors, (2127), 2 states have internal predecessors, (2127), 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)
[2021-12-06 21:58:27,262 INFO  L276                IsEmpty]: Start isEmpty. Operand 226350 states and 234547 transitions.
[2021-12-06 21:58:27,570 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2250
[2021-12-06 21:58:27,571 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:58:27,572 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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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]
[2021-12-06 21:58:27,572 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2021-12-06 21:58:27,572 INFO  L402      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:58:27,572 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:58:27,573 INFO  L85        PathProgramCache]: Analyzing trace with hash 1134619610, now seen corresponding path program 1 times
[2021-12-06 21:58:27,573 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:58:27,573 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000034517]
[2021-12-06 21:58:27,573 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:58:27,573 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:58:27,733 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:58:28,332 INFO  L134       CoverageAnalysis]: Checked inductivity of 1142 backedges. 638 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked.
[2021-12-06 21:58:28,332 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:58:28,332 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000034517]
[2021-12-06 21:58:28,332 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000034517] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:58:28,332 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:58:28,332 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:58:28,333 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68592211]
[2021-12-06 21:58:28,333 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:58:28,335 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:58:28,335 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:58:28,335 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:58:28,335 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:28,335 INFO  L87              Difference]: Start difference. First operand 226350 states and 234547 transitions. Second operand  has 3 states, 3 states have (on average 655.0) internal successors, (1965), 3 states have internal predecessors, (1965), 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)
[2021-12-06 21:58:32,147 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:32,147 INFO  L93              Difference]: Finished difference Result 510498 states and 528734 transitions.
[2021-12-06 21:58:32,147 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:58:32,148 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 655.0) internal successors, (1965), 3 states have internal predecessors, (1965), 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 2249
[2021-12-06 21:58:32,148 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:32,427 INFO  L225             Difference]: With dead ends: 510498
[2021-12-06 21:58:32,427 INFO  L226             Difference]: Without dead ends: 284150
[2021-12-06 21:58:32,507 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:32,507 INFO  L933         BasicCegarLoop]: 2997 mSDtfsCounter, 1558 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 4813 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 3211 SdHoareTripleChecker+Invalid, 5155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 4813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:32,508 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1558 Valid, 3211 Invalid, 5155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 4813 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2021-12-06 21:58:32,822 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 284150 states.
[2021-12-06 21:58:34,835 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 284150 to 282386.
[2021-12-06 21:58:34,998 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 282386 states, 282385 states have (on average 1.0333870425128813) internal successors, (291813), 282385 states have internal predecessors, (291813), 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)
[2021-12-06 21:58:35,461 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 282386 states to 282386 states and 291813 transitions.
[2021-12-06 21:58:35,462 INFO  L78                 Accepts]: Start accepts. Automaton has 282386 states and 291813 transitions. Word has length 2249
[2021-12-06 21:58:35,462 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:58:35,462 INFO  L470      AbstractCegarLoop]: Abstraction has 282386 states and 291813 transitions.
[2021-12-06 21:58:35,463 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 655.0) internal successors, (1965), 3 states have internal predecessors, (1965), 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)
[2021-12-06 21:58:35,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 282386 states and 291813 transitions.
[2021-12-06 21:58:35,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2264
[2021-12-06 21:58:35,774 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:58:35,775 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2021-12-06 21:58:35,776 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2021-12-06 21:58:35,776 INFO  L402      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:58:35,776 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:58:35,777 INFO  L85        PathProgramCache]: Analyzing trace with hash -262592515, now seen corresponding path program 1 times
[2021-12-06 21:58:35,777 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:58:35,777 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285810797]
[2021-12-06 21:58:35,777 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:58:35,777 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:58:35,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:58:36,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 729 backedges. 610 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked.
[2021-12-06 21:58:36,558 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:58:36,558 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285810797]
[2021-12-06 21:58:36,558 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285810797] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:58:36,558 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:58:36,558 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:58:36,558 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180991557]
[2021-12-06 21:58:36,558 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:58:36,560 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-06 21:58:36,560 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:58:36,560 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-06 21:58:36,560 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 21:58:36,561 INFO  L87              Difference]: Start difference. First operand 282386 states and 291813 transitions. Second operand  has 4 states, 4 states have (on average 536.25) internal successors, (2145), 3 states have internal predecessors, (2145), 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)
[2021-12-06 21:58:41,814 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:41,814 INFO  L93              Difference]: Finished difference Result 568195 states and 587168 transitions.
[2021-12-06 21:58:41,815 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-06 21:58:41,815 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 536.25) internal successors, (2145), 3 states have internal predecessors, (2145), 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 2263
[2021-12-06 21:58:41,815 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:42,118 INFO  L225             Difference]: With dead ends: 568195
[2021-12-06 21:58:42,118 INFO  L226             Difference]: Without dead ends: 284104
[2021-12-06 21:58:42,206 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 21:58:42,207 INFO  L933         BasicCegarLoop]: 863 mSDtfsCounter, 3723 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 8652 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3723 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 9247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 8652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:42,207 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3723 Valid, 1159 Invalid, 9247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 8652 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time]
[2021-12-06 21:58:42,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 284104 states.
[2021-12-06 21:58:44,540 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 284104 to 282378.
[2021-12-06 21:58:44,664 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 282378 states, 282377 states have (on average 1.03335257474936) internal successors, (291795), 282377 states have internal predecessors, (291795), 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)
[2021-12-06 21:58:45,124 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 282378 states to 282378 states and 291795 transitions.
[2021-12-06 21:58:45,124 INFO  L78                 Accepts]: Start accepts. Automaton has 282378 states and 291795 transitions. Word has length 2263
[2021-12-06 21:58:45,125 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:58:45,125 INFO  L470      AbstractCegarLoop]: Abstraction has 282378 states and 291795 transitions.
[2021-12-06 21:58:45,126 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 536.25) internal successors, (2145), 3 states have internal predecessors, (2145), 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)
[2021-12-06 21:58:45,126 INFO  L276                IsEmpty]: Start isEmpty. Operand 282378 states and 291795 transitions.
[2021-12-06 21:58:45,273 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2311
[2021-12-06 21:58:45,273 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:58:45,274 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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[2021-12-06 21:58:45,274 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2021-12-06 21:58:45,275 INFO  L402      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:58:45,275 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:58:45,276 INFO  L85        PathProgramCache]: Analyzing trace with hash 2131805200, now seen corresponding path program 1 times
[2021-12-06 21:58:45,276 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:58:45,276 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015060232]
[2021-12-06 21:58:45,276 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:58:45,276 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:58:45,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:58:46,283 INFO  L134       CoverageAnalysis]: Checked inductivity of 1177 backedges. 998 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked.
[2021-12-06 21:58:46,283 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:58:46,283 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015060232]
[2021-12-06 21:58:46,284 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015060232] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:58:46,284 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:58:46,284 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:58:46,284 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865215085]
[2021-12-06 21:58:46,284 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:58:46,286 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:58:46,286 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:58:46,286 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:58:46,286 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:46,286 INFO  L87              Difference]: Start difference. First operand 282378 states and 291795 transitions. Second operand  has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 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)
[2021-12-06 21:58:50,142 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:50,142 INFO  L93              Difference]: Finished difference Result 588531 states and 607893 transitions.
[2021-12-06 21:58:50,142 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:58:50,143 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 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 2310
[2021-12-06 21:58:50,143 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:50,589 INFO  L225             Difference]: With dead ends: 588531
[2021-12-06 21:58:50,590 INFO  L226             Difference]: Without dead ends: 306155
[2021-12-06 21:58:50,681 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:50,682 INFO  L933         BasicCegarLoop]: 1241 mSDtfsCounter, 1523 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 4458 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 4692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 4458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:50,682 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1471 Invalid, 4692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 4458 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2021-12-06 21:58:50,903 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 306155 states.
[2021-12-06 21:58:53,107 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 306155 to 290871.
[2021-12-06 21:58:53,239 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 290871 states, 290870 states have (on average 1.0329906831230447) internal successors, (300466), 290870 states have internal predecessors, (300466), 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)
[2021-12-06 21:58:53,690 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 290871 states to 290871 states and 300466 transitions.
[2021-12-06 21:58:53,691 INFO  L78                 Accepts]: Start accepts. Automaton has 290871 states and 300466 transitions. Word has length 2310
[2021-12-06 21:58:53,691 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:58:53,691 INFO  L470      AbstractCegarLoop]: Abstraction has 290871 states and 300466 transitions.
[2021-12-06 21:58:53,692 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 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)
[2021-12-06 21:58:53,692 INFO  L276                IsEmpty]: Start isEmpty. Operand 290871 states and 300466 transitions.
[2021-12-06 21:58:53,845 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2340
[2021-12-06 21:58:53,846 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:58:53,847 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 21:58:53,847 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2021-12-06 21:58:53,847 INFO  L402      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:58:53,847 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:58:53,848 INFO  L85        PathProgramCache]: Analyzing trace with hash 748952262, now seen corresponding path program 1 times
[2021-12-06 21:58:53,848 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:58:53,848 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228821163]
[2021-12-06 21:58:53,848 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:58:53,848 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:58:54,034 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:58:54,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 1513 backedges. 1215 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked.
[2021-12-06 21:58:54,825 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:58:54,826 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228821163]
[2021-12-06 21:58:54,826 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228821163] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:58:54,826 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:58:54,826 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:58:54,826 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494949124]
[2021-12-06 21:58:54,826 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:58:54,828 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:58:54,828 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:58:54,828 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:58:54,828 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:54,829 INFO  L87              Difference]: Start difference. First operand 290871 states and 300466 transitions. Second operand  has 3 states, 3 states have (on average 693.0) internal successors, (2079), 3 states have internal predecessors, (2079), 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)
[2021-12-06 21:58:58,705 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:58:58,705 INFO  L93              Difference]: Finished difference Result 668332 states and 691360 transitions.
[2021-12-06 21:58:58,706 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:58:58,706 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 693.0) internal successors, (2079), 3 states have internal predecessors, (2079), 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 2339
[2021-12-06 21:58:58,706 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:58:59,199 INFO  L225             Difference]: With dead ends: 668332
[2021-12-06 21:58:59,199 INFO  L226             Difference]: Without dead ends: 377463
[2021-12-06 21:58:59,265 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:58:59,266 INFO  L933         BasicCegarLoop]: 2902 mSDtfsCounter, 1756 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4126 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 4895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 4126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2021-12-06 21:58:59,266 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1756 Valid, 3196 Invalid, 4895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 4126 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2021-12-06 21:58:59,514 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 377463 states.
[2021-12-06 21:59:02,324 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 377463 to 353684.
[2021-12-06 21:59:02,440 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 353684 states, 353683 states have (on average 1.0289072417956193) internal successors, (363907), 353683 states have internal predecessors, (363907), 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)
[2021-12-06 21:59:02,782 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 353684 states to 353684 states and 363907 transitions.
[2021-12-06 21:59:02,782 INFO  L78                 Accepts]: Start accepts. Automaton has 353684 states and 363907 transitions. Word has length 2339
[2021-12-06 21:59:02,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:59:02,783 INFO  L470      AbstractCegarLoop]: Abstraction has 353684 states and 363907 transitions.
[2021-12-06 21:59:02,783 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 693.0) internal successors, (2079), 3 states have internal predecessors, (2079), 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)
[2021-12-06 21:59:02,783 INFO  L276                IsEmpty]: Start isEmpty. Operand 353684 states and 363907 transitions.
[2021-12-06 21:59:03,190 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2607
[2021-12-06 21:59:03,190 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:59:03,191 INFO  L514         BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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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, 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, 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, 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, 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, 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, 1, 1]
[2021-12-06 21:59:03,191 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2021-12-06 21:59:03,192 INFO  L402      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:59:03,192 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:59:03,192 INFO  L85        PathProgramCache]: Analyzing trace with hash -191810822, now seen corresponding path program 1 times
[2021-12-06 21:59:03,192 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:59:03,192 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645344329]
[2021-12-06 21:59:03,193 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:59:03,193 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:59:03,374 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:59:04,287 INFO  L134       CoverageAnalysis]: Checked inductivity of 2627 backedges. 1582 proven. 0 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked.
[2021-12-06 21:59:04,287 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:59:04,287 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645344329]
[2021-12-06 21:59:04,287 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645344329] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:59:04,287 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:59:04,288 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:59:04,288 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734016714]
[2021-12-06 21:59:04,288 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:59:04,290 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:59:04,290 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:59:04,290 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:59:04,290 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:04,290 INFO  L87              Difference]: Start difference. First operand 353684 states and 363907 transitions. Second operand  has 3 states, 3 states have (on average 657.3333333333334) internal successors, (1972), 3 states have internal predecessors, (1972), 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)
[2021-12-06 21:59:08,915 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:59:08,915 INFO  L93              Difference]: Finished difference Result 782088 states and 804826 transitions.
[2021-12-06 21:59:08,916 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:59:08,916 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 657.3333333333334) internal successors, (1972), 3 states have internal predecessors, (1972), 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 2606
[2021-12-06 21:59:08,916 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:59:09,372 INFO  L225             Difference]: With dead ends: 782088
[2021-12-06 21:59:09,373 INFO  L226             Difference]: Without dead ends: 426697
[2021-12-06 21:59:09,471 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:09,471 INFO  L933         BasicCegarLoop]: 2928 mSDtfsCounter, 1747 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 4513 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 3144 SdHoareTripleChecker+Invalid, 5203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 4513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2021-12-06 21:59:09,472 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1747 Valid, 3144 Invalid, 5203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 4513 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2021-12-06 21:59:09,904 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 426697 states.
[2021-12-06 21:59:13,007 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 426697 to 413103.
[2021-12-06 21:59:13,162 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 413103 states, 413102 states have (on average 1.0235075114620602) internal successors, (422813), 413102 states have internal predecessors, (422813), 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)
[2021-12-06 21:59:13,613 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 413103 states to 413103 states and 422813 transitions.
[2021-12-06 21:59:13,613 INFO  L78                 Accepts]: Start accepts. Automaton has 413103 states and 422813 transitions. Word has length 2606
[2021-12-06 21:59:13,614 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:59:13,614 INFO  L470      AbstractCegarLoop]: Abstraction has 413103 states and 422813 transitions.
[2021-12-06 21:59:13,615 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 657.3333333333334) internal successors, (1972), 3 states have internal predecessors, (1972), 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)
[2021-12-06 21:59:13,615 INFO  L276                IsEmpty]: Start isEmpty. Operand 413103 states and 422813 transitions.
[2021-12-06 21:59:14,175 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2618
[2021-12-06 21:59:14,176 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:59:14,177 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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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]
[2021-12-06 21:59:14,177 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2021-12-06 21:59:14,177 INFO  L402      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:59:14,178 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:59:14,178 INFO  L85        PathProgramCache]: Analyzing trace with hash 118275733, now seen corresponding path program 1 times
[2021-12-06 21:59:14,178 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:59:14,178 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699093444]
[2021-12-06 21:59:14,179 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:59:14,179 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:59:14,415 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:59:15,458 INFO  L134       CoverageAnalysis]: Checked inductivity of 1849 backedges. 1297 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked.
[2021-12-06 21:59:15,459 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:59:15,459 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699093444]
[2021-12-06 21:59:15,459 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699093444] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:59:15,459 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:59:15,459 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:59:15,459 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548606220]
[2021-12-06 21:59:15,459 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:59:15,461 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:59:15,461 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:59:15,461 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:59:15,461 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:15,462 INFO  L87              Difference]: Start difference. First operand 413103 states and 422813 transitions. Second operand  has 3 states, 3 states have (on average 725.0) internal successors, (2175), 3 states have internal predecessors, (2175), 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)
[2021-12-06 21:59:20,094 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:59:20,095 INFO  L93              Difference]: Finished difference Result 844941 states and 864513 transitions.
[2021-12-06 21:59:20,095 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:59:20,095 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 725.0) internal successors, (2175), 3 states have internal predecessors, (2175), 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 2617
[2021-12-06 21:59:20,096 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:59:20,590 INFO  L225             Difference]: With dead ends: 844941
[2021-12-06 21:59:20,591 INFO  L226             Difference]: Without dead ends: 430131
[2021-12-06 21:59:20,739 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:20,740 INFO  L933         BasicCegarLoop]: 1287 mSDtfsCounter, 1704 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 4790 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 5106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 4790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2021-12-06 21:59:20,740 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 1485 Invalid, 5106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 4790 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2021-12-06 21:59:21,229 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 430131 states.
[2021-12-06 21:59:24,659 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 430131 to 413093.
[2021-12-06 21:59:24,860 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 413093 states, 413092 states have (on average 1.021840171196731) internal successors, (422114), 413092 states have internal predecessors, (422114), 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)
[2021-12-06 21:59:25,480 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 413093 states to 413093 states and 422114 transitions.
[2021-12-06 21:59:25,480 INFO  L78                 Accepts]: Start accepts. Automaton has 413093 states and 422114 transitions. Word has length 2617
[2021-12-06 21:59:25,481 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:59:25,481 INFO  L470      AbstractCegarLoop]: Abstraction has 413093 states and 422114 transitions.
[2021-12-06 21:59:25,481 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 725.0) internal successors, (2175), 3 states have internal predecessors, (2175), 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)
[2021-12-06 21:59:25,481 INFO  L276                IsEmpty]: Start isEmpty. Operand 413093 states and 422114 transitions.
[2021-12-06 21:59:25,715 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2619
[2021-12-06 21:59:25,715 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:59:25,717 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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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]
[2021-12-06 21:59:25,717 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2021-12-06 21:59:25,717 INFO  L402      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:59:25,717 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:59:25,718 INFO  L85        PathProgramCache]: Analyzing trace with hash 2038824137, now seen corresponding path program 1 times
[2021-12-06 21:59:25,718 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:59:25,718 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973178909]
[2021-12-06 21:59:25,718 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:59:25,718 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:59:26,218 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:59:27,231 INFO  L134       CoverageAnalysis]: Checked inductivity of 2088 backedges. 929 proven. 0 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked.
[2021-12-06 21:59:27,231 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:59:27,231 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973178909]
[2021-12-06 21:59:27,231 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973178909] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:59:27,231 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:59:27,231 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:59:27,232 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652553350]
[2021-12-06 21:59:27,232 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:59:27,233 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:59:27,233 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:59:27,234 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:59:27,234 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:27,234 INFO  L87              Difference]: Start difference. First operand 413093 states and 422114 transitions. Second operand  has 3 states, 3 states have (on average 671.6666666666666) internal successors, (2015), 3 states have internal predecessors, (2015), 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)
[2021-12-06 21:59:32,167 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:59:32,167 INFO  L93              Difference]: Finished difference Result 890760 states and 910746 transitions.
[2021-12-06 21:59:32,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:59:32,168 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 671.6666666666666) internal successors, (2015), 3 states have internal predecessors, (2015), 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 2618
[2021-12-06 21:59:32,168 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:59:32,751 INFO  L225             Difference]: With dead ends: 890760
[2021-12-06 21:59:32,751 INFO  L226             Difference]: Without dead ends: 472549
[2021-12-06 21:59:32,902 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:32,902 INFO  L933         BasicCegarLoop]: 2811 mSDtfsCounter, 185 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4569 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 5343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 4569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2021-12-06 21:59:32,903 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 2978 Invalid, 5343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 4569 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2021-12-06 21:59:33,282 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 472549 states.
[2021-12-06 21:59:36,717 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 472549 to 460609.
[2021-12-06 21:59:36,910 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 460609 states, 460608 states have (on average 1.017889398360428) internal successors, (468848), 460608 states have internal predecessors, (468848), 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)
[2021-12-06 21:59:37,636 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 460609 states to 460609 states and 468848 transitions.
[2021-12-06 21:59:37,637 INFO  L78                 Accepts]: Start accepts. Automaton has 460609 states and 468848 transitions. Word has length 2618
[2021-12-06 21:59:37,638 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:59:37,638 INFO  L470      AbstractCegarLoop]: Abstraction has 460609 states and 468848 transitions.
[2021-12-06 21:59:37,638 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 671.6666666666666) internal successors, (2015), 3 states have internal predecessors, (2015), 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)
[2021-12-06 21:59:37,638 INFO  L276                IsEmpty]: Start isEmpty. Operand 460609 states and 468848 transitions.
[2021-12-06 21:59:37,909 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2676
[2021-12-06 21:59:37,909 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:59:37,911 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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[2021-12-06 21:59:37,911 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2021-12-06 21:59:37,911 INFO  L402      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:59:37,911 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:59:37,912 INFO  L85        PathProgramCache]: Analyzing trace with hash 77597539, now seen corresponding path program 1 times
[2021-12-06 21:59:37,912 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:59:37,912 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075971893]
[2021-12-06 21:59:37,912 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:59:37,912 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:59:38,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:59:39,132 INFO  L134       CoverageAnalysis]: Checked inductivity of 2032 backedges. 1419 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked.
[2021-12-06 21:59:39,132 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:59:39,132 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075971893]
[2021-12-06 21:59:39,132 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075971893] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:59:39,132 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:59:39,133 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:59:39,133 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455647258]
[2021-12-06 21:59:39,133 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:59:39,134 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:59:39,134 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:59:39,135 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:59:39,135 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:39,135 INFO  L87              Difference]: Start difference. First operand 460609 states and 468848 transitions. Second operand  has 3 states, 3 states have (on average 728.0) internal successors, (2184), 3 states have internal predecessors, (2184), 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)
[2021-12-06 21:59:43,627 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:59:43,628 INFO  L93              Difference]: Finished difference Result 916116 states and 932495 transitions.
[2021-12-06 21:59:43,628 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:59:43,628 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 728.0) internal successors, (2184), 3 states have internal predecessors, (2184), 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 2675
[2021-12-06 21:59:43,628 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:59:44,138 INFO  L225             Difference]: With dead ends: 916116
[2021-12-06 21:59:44,138 INFO  L226             Difference]: Without dead ends: 455509
[2021-12-06 21:59:44,294 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:44,294 INFO  L933         BasicCegarLoop]: 686 mSDtfsCounter, 1745 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4279 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 4868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 4279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time
[2021-12-06 21:59:44,295 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1745 Valid, 819 Invalid, 4868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 4279 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time]
[2021-12-06 21:59:44,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 455509 states.
[2021-12-06 21:59:48,080 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 455509 to 447012.
[2021-12-06 21:59:48,303 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 447012 states, 447011 states have (on average 1.0142412602821855) internal successors, (453377), 447011 states have internal predecessors, (453377), 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)
[2021-12-06 21:59:48,962 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 447012 states to 447012 states and 453377 transitions.
[2021-12-06 21:59:48,962 INFO  L78                 Accepts]: Start accepts. Automaton has 447012 states and 453377 transitions. Word has length 2675
[2021-12-06 21:59:48,963 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 21:59:48,963 INFO  L470      AbstractCegarLoop]: Abstraction has 447012 states and 453377 transitions.
[2021-12-06 21:59:48,963 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 728.0) internal successors, (2184), 3 states have internal predecessors, (2184), 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)
[2021-12-06 21:59:48,963 INFO  L276                IsEmpty]: Start isEmpty. Operand 447012 states and 453377 transitions.
[2021-12-06 21:59:49,198 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2743
[2021-12-06 21:59:49,198 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 21:59:49,199 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 21:59:49,199 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2021-12-06 21:59:49,200 INFO  L402      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 21:59:49,200 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 21:59:49,200 INFO  L85        PathProgramCache]: Analyzing trace with hash -945184711, now seen corresponding path program 1 times
[2021-12-06 21:59:49,200 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 21:59:49,201 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660332713]
[2021-12-06 21:59:49,201 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 21:59:49,201 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 21:59:49,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 21:59:50,466 INFO  L134       CoverageAnalysis]: Checked inductivity of 2489 backedges. 1482 proven. 0 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked.
[2021-12-06 21:59:50,466 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 21:59:50,466 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660332713]
[2021-12-06 21:59:50,466 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660332713] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 21:59:50,466 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 21:59:50,467 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 21:59:50,467 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600559186]
[2021-12-06 21:59:50,467 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 21:59:50,469 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 21:59:50,469 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 21:59:50,469 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 21:59:50,469 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:50,469 INFO  L87              Difference]: Start difference. First operand 447012 states and 453377 transitions. Second operand  has 3 states, 3 states have (on average 723.0) internal successors, (2169), 3 states have internal predecessors, (2169), 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)
[2021-12-06 21:59:54,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 21:59:54,935 INFO  L93              Difference]: Finished difference Result 897426 states and 910167 transitions.
[2021-12-06 21:59:54,935 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 21:59:54,936 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 723.0) internal successors, (2169), 3 states have internal predecessors, (2169), 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 2742
[2021-12-06 21:59:54,936 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 21:59:55,446 INFO  L225             Difference]: With dead ends: 897426
[2021-12-06 21:59:55,447 INFO  L226             Difference]: Without dead ends: 448718
[2021-12-06 21:59:55,608 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 21:59:55,608 INFO  L933         BasicCegarLoop]: 2796 mSDtfsCounter, 1415 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 4401 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1415 SdHoareTripleChecker+Valid, 2996 SdHoareTripleChecker+Invalid, 4879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 4401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2021-12-06 21:59:55,609 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1415 Valid, 2996 Invalid, 4879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 4401 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2021-12-06 21:59:56,121 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 448718 states.
[2021-12-06 21:59:59,342 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 448718 to 438516.
[2021-12-06 21:59:59,558 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 438516 states, 438515 states have (on average 1.0119425789311653) internal successors, (443752), 438515 states have internal predecessors, (443752), 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)
[2021-12-06 22:00:00,210 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 438516 states to 438516 states and 443752 transitions.
[2021-12-06 22:00:00,210 INFO  L78                 Accepts]: Start accepts. Automaton has 438516 states and 443752 transitions. Word has length 2742
[2021-12-06 22:00:00,211 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:00:00,211 INFO  L470      AbstractCegarLoop]: Abstraction has 438516 states and 443752 transitions.
[2021-12-06 22:00:00,212 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 723.0) internal successors, (2169), 3 states have internal predecessors, (2169), 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)
[2021-12-06 22:00:00,212 INFO  L276                IsEmpty]: Start isEmpty. Operand 438516 states and 443752 transitions.
[2021-12-06 22:00:00,505 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3576
[2021-12-06 22:00:00,505 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:00:00,507 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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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]
[2021-12-06 22:00:00,507 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20
[2021-12-06 22:00:00,507 INFO  L402      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:00:00,507 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:00:00,508 INFO  L85        PathProgramCache]: Analyzing trace with hash 773432751, now seen corresponding path program 1 times
[2021-12-06 22:00:00,508 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:00:00,508 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933779695]
[2021-12-06 22:00:00,508 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:00:00,508 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:00:01,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:00:02,811 INFO  L134       CoverageAnalysis]: Checked inductivity of 4412 backedges. 3436 proven. 466 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked.
[2021-12-06 22:00:02,811 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:00:02,811 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933779695]
[2021-12-06 22:00:02,812 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933779695] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-06 22:00:02,812 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330610093]
[2021-12-06 22:00:02,812 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:00:02,812 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-06 22:00:02,812 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/z3
[2021-12-06 22:00:02,813 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-06 22:00:02,814 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0954a59c-21a9-4a43-a870-50397e50877e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process