./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem05_label56.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 53f42b1a
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem05_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF --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 c05e0afe400610a03af7f85bf1fa08609bbde642205244db1c80922af0f91249
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-53f42b1
[2021-11-20 06:03:09,796 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-11-20 06:03:09,798 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-20 06:03:09,829 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-20 06:03:09,829 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-20 06:03:09,831 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-20 06:03:09,833 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-20 06:03:09,835 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-20 06:03:09,838 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-20 06:03:09,839 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-20 06:03:09,840 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-11-20 06:03:09,842 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-20 06:03:09,843 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-20 06:03:09,844 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-20 06:03:09,846 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-20 06:03:09,847 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-20 06:03:09,849 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-20 06:03:09,850 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-20 06:03:09,852 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-20 06:03:09,855 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-20 06:03:09,857 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-20 06:03:09,858 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-20 06:03:09,860 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-11-20 06:03:09,861 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-20 06:03:09,865 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-20 06:03:09,866 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-20 06:03:09,866 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-20 06:03:09,868 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-20 06:03:09,868 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-20 06:03:09,870 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-20 06:03:09,870 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-20 06:03:09,871 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-20 06:03:09,872 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-20 06:03:09,874 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-20 06:03:09,875 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-20 06:03:09,875 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-20 06:03:09,876 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-20 06:03:09,877 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-20 06:03:09,877 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-20 06:03:09,878 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-20 06:03:09,879 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-11-20 06:03:09,880 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-11-20 06:03:09,905 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-11-20 06:03:09,905 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-20 06:03:09,906 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-11-20 06:03:09,906 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-11-20 06:03:09,907 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-20 06:03:09,907 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-11-20 06:03:09,908 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-11-20 06:03:09,908 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-11-20 06:03:09,908 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-11-20 06:03:09,909 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-20 06:03:09,909 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-11-20 06:03:09,909 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-11-20 06:03:09,910 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-11-20 06:03:09,910 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-11-20 06:03:09,910 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-11-20 06:03:09,910 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-20 06:03:09,911 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-11-20 06:03:09,911 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-11-20 06:03:09,911 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-11-20 06:03:09,911 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-11-20 06:03:09,912 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-11-20 06:03:09,912 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-20 06:03:09,912 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-11-20 06:03:09,913 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-11-20 06:03:09,913 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-20 06:03:09,913 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-20 06:03:09,913 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-11-20 06:03:09,914 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-20 06:03:09,914 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-11-20 06:03:09,914 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-20 06:03:09,915 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-11-20 06:03:09,915 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-11-20 06:03:09,915 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-20 06:03:09,915 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-11-20 06:03:09,916 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_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/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_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF
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 -> c05e0afe400610a03af7f85bf1fa08609bbde642205244db1c80922af0f91249
[2021-11-20 06:03:10,162 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-20 06:03:10,184 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-20 06:03:10,187 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-20 06:03:10,189 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-11-20 06:03:10,189 INFO  L275        PluginConnector]: CDTParser initialized
[2021-11-20 06:03:10,191 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem05_label56.c
[2021-11-20 06:03:10,285 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/data/b0d8ca2e6/53f07508de9f4d87a996a88825287e37/FLAG97b3029b9
[2021-11-20 06:03:11,360 INFO  L306              CDTParser]: Found 1 translation units.
[2021-11-20 06:03:11,361 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/sv-benchmarks/c/eca-rers2012/Problem05_label56.c
[2021-11-20 06:03:11,410 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/data/b0d8ca2e6/53f07508de9f4d87a996a88825287e37/FLAG97b3029b9
[2021-11-20 06:03:11,664 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/data/b0d8ca2e6/53f07508de9f4d87a996a88825287e37
[2021-11-20 06:03:11,666 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-20 06:03:11,669 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-20 06:03:11,670 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-20 06:03:11,670 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-20 06:03:11,675 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-20 06:03:11,676 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:11" (1/1) ...
[2021-11-20 06:03:11,677 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48af6963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:11, skipping insertion in model container
[2021-11-20 06:03:11,678 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:11" (1/1) ...
[2021-11-20 06:03:11,685 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-11-20 06:03:11,944 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-11-20 06:03:14,603 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_1f6ba3e3-0375-4b3b-8f55-9470970765ba/sv-benchmarks/c/eca-rers2012/Problem05_label56.c[379708,379721]
[2021-11-20 06:03:14,625 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-11-20 06:03:14,640 INFO  L203         MainTranslator]: Completed pre-run
[2021-11-20 06:03:16,139 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_1f6ba3e3-0375-4b3b-8f55-9470970765ba/sv-benchmarks/c/eca-rers2012/Problem05_label56.c[379708,379721]
[2021-11-20 06:03:16,147 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-11-20 06:03:16,210 INFO  L208         MainTranslator]: Completed translation
[2021-11-20 06:03:16,211 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16 WrapperNode
[2021-11-20 06:03:16,211 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-20 06:03:16,213 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-20 06:03:16,213 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-20 06:03:16,213 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-20 06:03:16,221 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:16,327 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:16,849 INFO  L137                Inliner]: procedures = 21, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 12346
[2021-11-20 06:03:16,849 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-20 06:03:16,850 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-20 06:03:16,850 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-20 06:03:16,851 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-11-20 06:03:16,859 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:16,860 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:16,919 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:16,919 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:17,118 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:17,203 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:17,275 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:17,349 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-20 06:03:17,351 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-20 06:03:17,351 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-11-20 06:03:17,351 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-11-20 06:03:17,352 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ...
[2021-11-20 06:03:17,360 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-20 06:03:17,370 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/z3
[2021-11-20 06:03:17,383 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-20 06:03:17,385 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6ba3e3-0375-4b3b-8f55-9470970765ba/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-20 06:03:17,426 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-11-20 06:03:17,426 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-20 06:03:17,426 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-20 06:03:17,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-20 06:03:17,636 INFO  L236             CfgBuilder]: Building ICFG
[2021-11-20 06:03:17,650 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-11-20 06:03:24,915 INFO  L277             CfgBuilder]: Performing block encoding
[2021-11-20 06:03:24,943 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-20 06:03:24,943 INFO  L301             CfgBuilder]: Removed 1 assume(true) statements.
[2021-11-20 06:03:24,948 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:24 BoogieIcfgContainer
[2021-11-20 06:03:24,948 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-20 06:03:24,950 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-20 06:03:24,951 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-11-20 06:03:24,954 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-11-20 06:03:24,954 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:03:11" (1/3) ...
[2021-11-20 06:03:24,955 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6056f31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:24, skipping insertion in model container
[2021-11-20 06:03:24,955 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (2/3) ...
[2021-11-20 06:03:24,956 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6056f31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:24, skipping insertion in model container
[2021-11-20 06:03:24,956 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:24" (3/3) ...
[2021-11-20 06:03:24,957 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem05_label56.c
[2021-11-20 06:03:24,963 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-20 06:03:24,963 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-20 06:03:25,025 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-20 06:03:25,033 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-11-20 06:03:25,033 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-20 06:03:25,097 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)
[2021-11-20 06:03:25,239 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1674
[2021-11-20 06:03:25,239 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:03:25,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 06:03:25,242 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:03:25,248 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:03:25,249 INFO  L85        PathProgramCache]: Analyzing trace with hash 197007929, now seen corresponding path program 1 times
[2021-11-20 06:03:25,259 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:03:25,259 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907483710]
[2021-11-20 06:03:25,260 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:03:25,262 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:03:25,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:03:28,598 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 06:03:28,599 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:03:28,599 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907483710]
[2021-11-20 06:03:28,600 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907483710] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:03:28,600 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:03:28,601 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:03:28,603 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051960603]
[2021-11-20 06:03:28,604 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:03:28,614 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-20 06:03:28,615 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:03:28,654 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-20 06:03:28,656 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-20 06:03:28,666 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 4 states, 4 states have (on average 418.25) internal successors, (1673), 3 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:03:45,054 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:03:45,054 INFO  L93              Difference]: Finished difference Result 9493 states and 18317 transitions.
[2021-11-20 06:03:45,056 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-11-20 06:03:45,058 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 418.25) internal successors, (1673), 3 states have internal predecessors, (1673), 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 1673
[2021-11-20 06:03:45,069 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:03:45,134 INFO  L225             Difference]: With dead ends: 9493
[2021-11-20 06:03:45,134 INFO  L226             Difference]: Without dead ends: 7238
[2021-11-20 06:03:45,143 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-11-20 06:03:45,146 INFO  L933         BasicCegarLoop]: 2350 mSDtfsCounter, 3666 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 13848 mSolverCounterSat, 5280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3666 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 19128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5280 IncrementalHoareTripleChecker+Valid, 13848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time
[2021-11-20 06:03:45,147 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3666 Valid, 2735 Invalid, 19128 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5280 Valid, 13848 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time]
[2021-11-20 06:03:45,175 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7238 states.
[2021-11-20 06:03:45,365 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5583.
[2021-11-20 06:03:45,382 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5583 states, 5582 states have (on average 1.5829451809387316) internal successors, (8836), 5582 states have internal predecessors, (8836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:03:45,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8836 transitions.
[2021-11-20 06:03:45,408 INFO  L78                 Accepts]: Start accepts. Automaton has 5583 states and 8836 transitions. Word has length 1673
[2021-11-20 06:03:45,412 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:03:45,412 INFO  L470      AbstractCegarLoop]: Abstraction has 5583 states and 8836 transitions.
[2021-11-20 06:03:45,413 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 418.25) internal successors, (1673), 3 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:03:45,413 INFO  L276                IsEmpty]: Start isEmpty. Operand 5583 states and 8836 transitions.
[2021-11-20 06:03:45,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1692
[2021-11-20 06:03:45,684 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:03:45,686 INFO  L514         BasicCegarLoop]: trace histogram [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, 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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]
[2021-11-20 06:03:45,686 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-20 06:03:45,687 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:03:45,688 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:03:45,688 INFO  L85        PathProgramCache]: Analyzing trace with hash 1606706727, now seen corresponding path program 1 times
[2021-11-20 06:03:45,689 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:03:45,689 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723397394]
[2021-11-20 06:03:45,690 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:03:45,690 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:03:46,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:03:47,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 06:03:47,719 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:03:47,720 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723397394]
[2021-11-20 06:03:47,720 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723397394] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:03:47,721 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:03:47,721 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:03:47,721 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44495269]
[2021-11-20 06:03:47,722 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:03:47,726 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:03:47,728 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:03:47,728 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:03:47,729 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:03:47,731 INFO  L87              Difference]: Start difference. First operand 5583 states and 8836 transitions. Second operand  has 3 states, 3 states have (on average 563.6666666666666) internal successors, (1691), 3 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:03:53,831 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:03:53,831 INFO  L93              Difference]: Finished difference Result 14718 states and 24340 transitions.
[2021-11-20 06:03:53,833 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:03:53,834 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 563.6666666666666) internal successors, (1691), 3 states have internal predecessors, (1691), 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 1691
[2021-11-20 06:03:53,838 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:03:53,892 INFO  L225             Difference]: With dead ends: 14718
[2021-11-20 06:03:53,892 INFO  L226             Difference]: Without dead ends: 9137
[2021-11-20 06:03:53,901 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
[2021-11-20 06:03:53,902 INFO  L933         BasicCegarLoop]: 3085 mSDtfsCounter, 383 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 5973 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 6846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 5973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time
[2021-11-20 06:03:53,903 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 3513 Invalid, 6846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 5973 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time]
[2021-11-20 06:03:53,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9137 states.
[2021-11-20 06:03:54,083 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 9096.
[2021-11-20 06:03:54,103 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9096 states, 9095 states have (on average 1.5478834524463991) internal successors, (14078), 9095 states have internal predecessors, (14078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:03:54,130 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9096 states to 9096 states and 14078 transitions.
[2021-11-20 06:03:54,130 INFO  L78                 Accepts]: Start accepts. Automaton has 9096 states and 14078 transitions. Word has length 1691
[2021-11-20 06:03:54,136 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:03:54,138 INFO  L470      AbstractCegarLoop]: Abstraction has 9096 states and 14078 transitions.
[2021-11-20 06:03:54,139 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 563.6666666666666) internal successors, (1691), 3 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:03:54,140 INFO  L276                IsEmpty]: Start isEmpty. Operand 9096 states and 14078 transitions.
[2021-11-20 06:03:54,189 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1703
[2021-11-20 06:03:54,190 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:03:54,192 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2021-11-20 06:03:54,195 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-20 06:03:54,196 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:03:54,196 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:03:54,197 INFO  L85        PathProgramCache]: Analyzing trace with hash 764093917, now seen corresponding path program 1 times
[2021-11-20 06:03:54,197 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:03:54,198 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36773474]
[2021-11-20 06:03:54,199 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:03:54,200 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:03:54,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:03:55,005 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 06:03:55,005 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:03:55,006 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36773474]
[2021-11-20 06:03:55,006 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36773474] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:03:55,007 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:03:55,007 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:03:55,008 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781764343]
[2021-11-20 06:03:55,008 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:03:55,011 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:03:55,011 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:03:55,012 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:03:55,012 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:03:55,013 INFO  L87              Difference]: Start difference. First operand 9096 states and 14078 transitions. Second operand  has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 3 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:01,082 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:04:01,082 INFO  L93              Difference]: Finished difference Result 25099 states and 39859 transitions.
[2021-11-20 06:04:01,082 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:04:01,083 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 3 states have internal predecessors, (1702), 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 1702
[2021-11-20 06:04:01,083 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:04:01,150 INFO  L225             Difference]: With dead ends: 25099
[2021-11-20 06:04:01,150 INFO  L226             Difference]: Without dead ends: 16005
[2021-11-20 06:04:01,166 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
[2021-11-20 06:04:01,168 INFO  L933         BasicCegarLoop]: 3376 mSDtfsCounter, 1890 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 5194 mSolverCounterSat, 2161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 3622 SdHoareTripleChecker+Invalid, 7355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2161 IncrementalHoareTripleChecker+Valid, 5194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time
[2021-11-20 06:04:01,169 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 3622 Invalid, 7355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2161 Valid, 5194 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time]
[2021-11-20 06:04:01,191 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16005 states.
[2021-11-20 06:04:01,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16005 to 15932.
[2021-11-20 06:04:01,507 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15932 states, 15931 states have (on average 1.4334316740945328) internal successors, (22836), 15931 states have internal predecessors, (22836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:01,540 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15932 states to 15932 states and 22836 transitions.
[2021-11-20 06:04:01,540 INFO  L78                 Accepts]: Start accepts. Automaton has 15932 states and 22836 transitions. Word has length 1702
[2021-11-20 06:04:01,541 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:04:01,541 INFO  L470      AbstractCegarLoop]: Abstraction has 15932 states and 22836 transitions.
[2021-11-20 06:04:01,542 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 3 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:01,543 INFO  L276                IsEmpty]: Start isEmpty. Operand 15932 states and 22836 transitions.
[2021-11-20 06:04:01,597 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1732
[2021-11-20 06:04:01,597 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:04:01,599 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2021-11-20 06:04:01,599 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-11-20 06:04:01,599 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:04:01,600 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:04:01,601 INFO  L85        PathProgramCache]: Analyzing trace with hash 576251195, now seen corresponding path program 1 times
[2021-11-20 06:04:01,601 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:04:01,601 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705166975]
[2021-11-20 06:04:01,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:04:01,602 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:04:01,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:04:02,359 INFO  L134       CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked.
[2021-11-20 06:04:02,360 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:04:02,360 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705166975]
[2021-11-20 06:04:02,360 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705166975] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:04:02,360 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:04:02,361 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:04:02,361 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475738970]
[2021-11-20 06:04:02,361 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:04:02,364 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-20 06:04:02,364 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:04:02,365 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-20 06:04:02,365 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-20 06:04:02,366 INFO  L87              Difference]: Start difference. First operand 15932 states and 22836 transitions. Second operand  has 4 states, 4 states have (on average 426.0) internal successors, (1704), 3 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:10,898 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:04:10,898 INFO  L93              Difference]: Finished difference Result 52265 states and 74655 transitions.
[2021-11-20 06:04:10,907 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-20 06:04:10,908 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 426.0) internal successors, (1704), 3 states have internal predecessors, (1704), 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 1731
[2021-11-20 06:04:10,908 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:04:10,983 INFO  L225             Difference]: With dead ends: 52265
[2021-11-20 06:04:10,983 INFO  L226             Difference]: Without dead ends: 36335
[2021-11-20 06:04:11,007 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
[2021-11-20 06:04:11,009 INFO  L933         BasicCegarLoop]: 1597 mSDtfsCounter, 4247 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 8837 mSolverCounterSat, 3379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4247 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 12216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3379 IncrementalHoareTripleChecker+Valid, 8837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time
[2021-11-20 06:04:11,010 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4247 Valid, 1946 Invalid, 12216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3379 Valid, 8837 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time]
[2021-11-20 06:04:11,048 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36335 states.
[2021-11-20 06:04:11,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36335 to 36324.
[2021-11-20 06:04:11,538 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36324 states, 36323 states have (on average 1.280703686369518) internal successors, (46519), 36323 states have internal predecessors, (46519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:11,607 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 46519 transitions.
[2021-11-20 06:04:11,608 INFO  L78                 Accepts]: Start accepts. Automaton has 36324 states and 46519 transitions. Word has length 1731
[2021-11-20 06:04:11,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:04:11,609 INFO  L470      AbstractCegarLoop]: Abstraction has 36324 states and 46519 transitions.
[2021-11-20 06:04:11,609 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 426.0) internal successors, (1704), 3 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:11,610 INFO  L276                IsEmpty]: Start isEmpty. Operand 36324 states and 46519 transitions.
[2021-11-20 06:04:11,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1761
[2021-11-20 06:04:11,706 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:04:11,707 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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[2021-11-20 06:04:11,708 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-11-20 06:04:11,708 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:04:11,708 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:04:11,709 INFO  L85        PathProgramCache]: Analyzing trace with hash 1770161709, now seen corresponding path program 1 times
[2021-11-20 06:04:11,709 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:04:11,710 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868162588]
[2021-11-20 06:04:11,710 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:04:11,710 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:04:11,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:04:12,284 INFO  L134       CoverageAnalysis]: Checked inductivity of 163 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked.
[2021-11-20 06:04:12,285 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:04:12,285 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868162588]
[2021-11-20 06:04:12,285 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868162588] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:04:12,285 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:04:12,286 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-20 06:04:12,286 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096458848]
[2021-11-20 06:04:12,286 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:04:12,288 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:04:12,289 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:04:12,289 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:04:12,289 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:04:12,290 INFO  L87              Difference]: Start difference. First operand 36324 states and 46519 transitions. Second operand  has 3 states, 3 states have (on average 573.0) internal successors, (1719), 2 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:18,423 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:04:18,423 INFO  L93              Difference]: Finished difference Result 91362 states and 116418 transitions.
[2021-11-20 06:04:18,423 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:04:18,424 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 573.0) internal successors, (1719), 2 states have internal predecessors, (1719), 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 1760
[2021-11-20 06:04:18,424 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:04:18,515 INFO  L225             Difference]: With dead ends: 91362
[2021-11-20 06:04:18,516 INFO  L226             Difference]: Without dead ends: 55040
[2021-11-20 06:04:18,557 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
[2021-11-20 06:04:18,558 INFO  L933         BasicCegarLoop]: 2017 mSDtfsCounter, 1968 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 2030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1968 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 7112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2030 IncrementalHoareTripleChecker+Valid, 5082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time
[2021-11-20 06:04:18,559 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1968 Valid, 2166 Invalid, 7112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2030 Valid, 5082 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time]
[2021-11-20 06:04:18,610 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55040 states.
[2021-11-20 06:04:19,196 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55040 to 55021.
[2021-11-20 06:04:19,249 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 55021 states, 55020 states have (on average 1.2046528535078154) internal successors, (66280), 55020 states have internal predecessors, (66280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:19,347 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55021 states to 55021 states and 66280 transitions.
[2021-11-20 06:04:19,347 INFO  L78                 Accepts]: Start accepts. Automaton has 55021 states and 66280 transitions. Word has length 1760
[2021-11-20 06:04:19,348 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:04:19,349 INFO  L470      AbstractCegarLoop]: Abstraction has 55021 states and 66280 transitions.
[2021-11-20 06:04:19,354 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 573.0) internal successors, (1719), 2 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:19,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 55021 states and 66280 transitions.
[2021-11-20 06:04:19,454 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1779
[2021-11-20 06:04:19,455 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:04:19,456 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-20 06:04:19,457 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-11-20 06:04:19,457 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:04:19,458 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:04:19,459 INFO  L85        PathProgramCache]: Analyzing trace with hash 1264691225, now seen corresponding path program 1 times
[2021-11-20 06:04:19,460 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:04:19,460 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507680817]
[2021-11-20 06:04:19,461 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:04:19,461 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:04:19,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:04:20,145 INFO  L134       CoverageAnalysis]: Checked inductivity of 222 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked.
[2021-11-20 06:04:20,147 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:04:20,147 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507680817]
[2021-11-20 06:04:20,148 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507680817] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:04:20,148 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:04:20,148 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-20 06:04:20,149 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010249799]
[2021-11-20 06:04:20,149 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:04:20,151 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:04:20,152 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:04:20,152 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:04:20,152 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:04:20,153 INFO  L87              Difference]: Start difference. First operand 55021 states and 66280 transitions. Second operand  has 3 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 2 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:25,838 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:04:25,838 INFO  L93              Difference]: Finished difference Result 137204 states and 163210 transitions.
[2021-11-20 06:04:25,839 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:04:25,839 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 2 states have internal predecessors, (1724), 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 1778
[2021-11-20 06:04:25,840 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:04:25,916 INFO  L225             Difference]: With dead ends: 137204
[2021-11-20 06:04:25,917 INFO  L226             Difference]: Without dead ends: 82185
[2021-11-20 06:04:25,934 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
[2021-11-20 06:04:25,936 INFO  L933         BasicCegarLoop]: 1069 mSDtfsCounter, 3154 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4772 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3154 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 5978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 4772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time
[2021-11-20 06:04:25,936 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3154 Valid, 1152 Invalid, 5978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 4772 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time]
[2021-11-20 06:04:26,013 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82185 states.
[2021-11-20 06:04:26,665 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82185 to 82185.
[2021-11-20 06:04:26,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 82185 states, 82184 states have (on average 1.1312177552808333) internal successors, (92968), 82184 states have internal predecessors, (92968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:26,864 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 82185 states to 82185 states and 92968 transitions.
[2021-11-20 06:04:26,865 INFO  L78                 Accepts]: Start accepts. Automaton has 82185 states and 92968 transitions. Word has length 1778
[2021-11-20 06:04:26,866 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:04:26,866 INFO  L470      AbstractCegarLoop]: Abstraction has 82185 states and 92968 transitions.
[2021-11-20 06:04:26,866 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 2 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:26,867 INFO  L276                IsEmpty]: Start isEmpty. Operand 82185 states and 92968 transitions.
[2021-11-20 06:04:26,980 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1893
[2021-11-20 06:04:26,981 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:04:26,982 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, 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, 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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]
[2021-11-20 06:04:26,983 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2021-11-20 06:04:26,983 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:04:26,983 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:04:26,984 INFO  L85        PathProgramCache]: Analyzing trace with hash 1491266519, now seen corresponding path program 1 times
[2021-11-20 06:04:26,984 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:04:26,985 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839723655]
[2021-11-20 06:04:26,985 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:04:26,985 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:04:27,133 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:04:27,725 INFO  L134       CoverageAnalysis]: Checked inductivity of 326 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-20 06:04:27,725 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:04:27,725 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839723655]
[2021-11-20 06:04:27,726 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839723655] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:04:27,726 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:04:27,726 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:04:27,726 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936824770]
[2021-11-20 06:04:27,727 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:04:27,729 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:04:27,729 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:04:27,730 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:04:27,730 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:04:27,731 INFO  L87              Difference]: Start difference. First operand 82185 states and 92968 transitions. Second operand  has 3 states, 3 states have (on average 630.6666666666666) internal successors, (1892), 3 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:34,908 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:04:34,908 INFO  L93              Difference]: Finished difference Result 193334 states and 221735 transitions.
[2021-11-20 06:04:34,909 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:04:34,909 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 630.6666666666666) internal successors, (1892), 3 states have internal predecessors, (1892), 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 1892
[2021-11-20 06:04:34,910 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:04:35,047 INFO  L225             Difference]: With dead ends: 193334
[2021-11-20 06:04:35,047 INFO  L226             Difference]: Without dead ends: 111151
[2021-11-20 06:04:35,088 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
[2021-11-20 06:04:35,090 INFO  L933         BasicCegarLoop]: 3742 mSDtfsCounter, 1763 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6093 mSolverCounterSat, 1267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 3969 SdHoareTripleChecker+Invalid, 7360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1267 IncrementalHoareTripleChecker+Valid, 6093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time
[2021-11-20 06:04:35,090 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1763 Valid, 3969 Invalid, 7360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1267 Valid, 6093 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time]
[2021-11-20 06:04:35,214 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111151 states.
[2021-11-20 06:04:36,537 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111151 to 111065.
[2021-11-20 06:04:36,611 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 111065 states, 111064 states have (on average 1.1191475185478643) internal successors, (124297), 111064 states have internal predecessors, (124297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:36,788 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 111065 states to 111065 states and 124297 transitions.
[2021-11-20 06:04:36,788 INFO  L78                 Accepts]: Start accepts. Automaton has 111065 states and 124297 transitions. Word has length 1892
[2021-11-20 06:04:36,788 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:04:36,789 INFO  L470      AbstractCegarLoop]: Abstraction has 111065 states and 124297 transitions.
[2021-11-20 06:04:36,789 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 630.6666666666666) internal successors, (1892), 3 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:36,789 INFO  L276                IsEmpty]: Start isEmpty. Operand 111065 states and 124297 transitions.
[2021-11-20 06:04:37,271 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2121
[2021-11-20 06:04:37,271 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:04:37,303 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2021-11-20 06:04:37,303 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2021-11-20 06:04:37,304 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:04:37,305 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:04:37,306 INFO  L85        PathProgramCache]: Analyzing trace with hash -1931444362, now seen corresponding path program 1 times
[2021-11-20 06:04:37,306 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:04:37,307 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859564162]
[2021-11-20 06:04:37,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:04:37,307 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:04:37,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:04:38,601 INFO  L134       CoverageAnalysis]: Checked inductivity of 771 backedges. 661 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked.
[2021-11-20 06:04:38,601 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:04:38,601 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859564162]
[2021-11-20 06:04:38,602 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859564162] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:04:38,602 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:04:38,602 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:04:38,603 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366105077]
[2021-11-20 06:04:38,603 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:04:38,606 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:04:38,606 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:04:38,607 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:04:38,607 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:04:38,608 INFO  L87              Difference]: Start difference. First operand 111065 states and 124297 transitions. Second operand  has 3 states, 3 states have (on average 670.3333333333334) internal successors, (2011), 3 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:45,001 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:04:45,001 INFO  L93              Difference]: Finished difference Result 249317 states and 280502 transitions.
[2021-11-20 06:04:45,002 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:04:45,002 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 670.3333333333334) internal successors, (2011), 3 states have internal predecessors, (2011), 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 2120
[2021-11-20 06:04:45,002 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:04:45,162 INFO  L225             Difference]: With dead ends: 249317
[2021-11-20 06:04:45,162 INFO  L226             Difference]: Without dead ends: 138254
[2021-11-20 06:04:45,361 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
[2021-11-20 06:04:45,362 INFO  L933         BasicCegarLoop]: 3820 mSDtfsCounter, 1588 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 5695 mSolverCounterSat, 1243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 4086 SdHoareTripleChecker+Invalid, 6938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1243 IncrementalHoareTripleChecker+Valid, 5695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time
[2021-11-20 06:04:45,362 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 4086 Invalid, 6938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1243 Valid, 5695 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time]
[2021-11-20 06:04:45,475 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 138254 states.
[2021-11-20 06:04:46,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 138254 to 138233.
[2021-11-20 06:04:46,911 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 138233 states, 138232 states have (on average 1.1026607442560334) internal successors, (152423), 138232 states have internal predecessors, (152423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:47,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 138233 states to 138233 states and 152423 transitions.
[2021-11-20 06:04:47,463 INFO  L78                 Accepts]: Start accepts. Automaton has 138233 states and 152423 transitions. Word has length 2120
[2021-11-20 06:04:47,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:04:47,464 INFO  L470      AbstractCegarLoop]: Abstraction has 138233 states and 152423 transitions.
[2021-11-20 06:04:47,465 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 670.3333333333334) internal successors, (2011), 3 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:47,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 138233 states and 152423 transitions.
[2021-11-20 06:04:47,647 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2157
[2021-11-20 06:04:47,647 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:04:47,648 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2021-11-20 06:04:47,648 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2021-11-20 06:04:47,649 INFO  L402      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:04:47,649 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:04:47,650 INFO  L85        PathProgramCache]: Analyzing trace with hash -1583547937, now seen corresponding path program 1 times
[2021-11-20 06:04:47,650 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:04:47,650 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59595833]
[2021-11-20 06:04:47,651 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:04:47,651 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:04:47,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:04:48,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 914 backedges. 769 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked.
[2021-11-20 06:04:48,825 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:04:48,825 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59595833]
[2021-11-20 06:04:48,825 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59595833] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:04:48,826 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:04:48,826 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:04:48,826 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695057373]
[2021-11-20 06:04:48,827 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:04:48,830 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:04:48,830 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:04:48,830 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:04:48,830 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:04:48,831 INFO  L87              Difference]: Start difference. First operand 138233 states and 152423 transitions. Second operand  has 3 states, 3 states have (on average 671.0) internal successors, (2013), 3 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:55,660 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:04:55,660 INFO  L93              Difference]: Finished difference Result 359651 states and 399026 transitions.
[2021-11-20 06:04:55,661 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:04:55,661 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 671.0) internal successors, (2013), 3 states have internal predecessors, (2013), 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 2156
[2021-11-20 06:04:55,662 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:04:55,979 INFO  L225             Difference]: With dead ends: 359651
[2021-11-20 06:04:55,979 INFO  L226             Difference]: Without dead ends: 221420
[2021-11-20 06:04:56,047 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
[2021-11-20 06:04:56,048 INFO  L933         BasicCegarLoop]: 3357 mSDtfsCounter, 2049 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4903 mSolverCounterSat, 2225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2049 SdHoareTripleChecker+Valid, 3466 SdHoareTripleChecker+Invalid, 7128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2225 IncrementalHoareTripleChecker+Valid, 4903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time
[2021-11-20 06:04:56,049 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2049 Valid, 3466 Invalid, 7128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2225 Valid, 4903 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time]
[2021-11-20 06:04:56,254 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 221420 states.
[2021-11-20 06:04:58,590 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 221420 to 221411.
[2021-11-20 06:04:58,731 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 221411 states, 221410 states have (on average 1.0951718531231651) internal successors, (242482), 221410 states have internal predecessors, (242482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:59,044 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 221411 states to 221411 states and 242482 transitions.
[2021-11-20 06:04:59,044 INFO  L78                 Accepts]: Start accepts. Automaton has 221411 states and 242482 transitions. Word has length 2156
[2021-11-20 06:04:59,045 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:04:59,045 INFO  L470      AbstractCegarLoop]: Abstraction has 221411 states and 242482 transitions.
[2021-11-20 06:04:59,045 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 671.0) internal successors, (2013), 3 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:04:59,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 221411 states and 242482 transitions.
[2021-11-20 06:04:59,811 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2163
[2021-11-20 06:04:59,811 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:04:59,813 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2021-11-20 06:04:59,813 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2021-11-20 06:04:59,813 INFO  L402      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:04:59,814 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:04:59,814 INFO  L85        PathProgramCache]: Analyzing trace with hash -424307895, now seen corresponding path program 1 times
[2021-11-20 06:04:59,814 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:04:59,814 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304131093]
[2021-11-20 06:04:59,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:04:59,815 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:05:00,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:05:00,776 INFO  L134       CoverageAnalysis]: Checked inductivity of 920 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked.
[2021-11-20 06:05:00,776 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:05:00,777 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304131093]
[2021-11-20 06:05:00,777 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304131093] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:05:00,777 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:05:00,777 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:05:00,778 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694203562]
[2021-11-20 06:05:00,778 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:05:00,781 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:05:00,781 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:05:00,782 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:05:00,782 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:05:00,783 INFO  L87              Difference]: Start difference. First operand 221411 states and 242482 transitions. Second operand  has 3 states, 3 states have (on average 673.3333333333334) internal successors, (2020), 3 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:05:07,383 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:05:07,383 INFO  L93              Difference]: Finished difference Result 441027 states and 482966 transitions.
[2021-11-20 06:05:07,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:05:07,384 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 673.3333333333334) internal successors, (2020), 3 states have internal predecessors, (2020), 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 2162
[2021-11-20 06:05:07,385 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:05:07,983 INFO  L225             Difference]: With dead ends: 441027
[2021-11-20 06:05:07,993 INFO  L226             Difference]: Without dead ends: 212795
[2021-11-20 06:05:08,096 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
[2021-11-20 06:05:08,098 INFO  L933         BasicCegarLoop]: 1480 mSDtfsCounter, 2554 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 4456 mSolverCounterSat, 1695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2554 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 6151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1695 IncrementalHoareTripleChecker+Valid, 4456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time
[2021-11-20 06:05:08,100 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2554 Valid, 1615 Invalid, 6151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1695 Valid, 4456 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time]
[2021-11-20 06:05:08,337 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 212795 states.
[2021-11-20 06:05:10,612 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 212795 to 190709.
[2021-11-20 06:05:10,695 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 190709 states, 190708 states have (on average 1.0654823080311262) internal successors, (203196), 190708 states have internal predecessors, (203196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:05:10,955 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 190709 states to 190709 states and 203196 transitions.
[2021-11-20 06:05:10,955 INFO  L78                 Accepts]: Start accepts. Automaton has 190709 states and 203196 transitions. Word has length 2162
[2021-11-20 06:05:10,956 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:05:10,956 INFO  L470      AbstractCegarLoop]: Abstraction has 190709 states and 203196 transitions.
[2021-11-20 06:05:10,956 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 673.3333333333334) internal successors, (2020), 3 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:05:10,957 INFO  L276                IsEmpty]: Start isEmpty. Operand 190709 states and 203196 transitions.
[2021-11-20 06:05:11,109 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2233
[2021-11-20 06:05:11,109 INFO  L506         BasicCegarLoop]: Found error trace
[2021-11-20 06:05:11,111 INFO  L514         BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2021-11-20 06:05:11,111 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2021-11-20 06:05:11,111 INFO  L402      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-20 06:05:11,112 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-20 06:05:11,112 INFO  L85        PathProgramCache]: Analyzing trace with hash 275371741, now seen corresponding path program 1 times
[2021-11-20 06:05:11,113 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-20 06:05:11,113 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575502686]
[2021-11-20 06:05:11,113 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-20 06:05:11,113 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-20 06:05:11,252 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-20 06:05:12,552 INFO  L134       CoverageAnalysis]: Checked inductivity of 1115 backedges. 778 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked.
[2021-11-20 06:05:12,552 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-20 06:05:12,553 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575502686]
[2021-11-20 06:05:12,553 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575502686] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-20 06:05:12,553 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-20 06:05:12,554 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-20 06:05:12,554 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249117386]
[2021-11-20 06:05:12,554 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-20 06:05:12,556 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-20 06:05:12,557 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-20 06:05:12,557 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-20 06:05:12,557 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-20 06:05:12,558 INFO  L87              Difference]: Start difference. First operand 190709 states and 203196 transitions. Second operand  has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:05:19,123 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-20 06:05:19,124 INFO  L93              Difference]: Finished difference Result 444233 states and 475872 transitions.
[2021-11-20 06:05:19,124 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-20 06:05:19,124 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 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 2232
[2021-11-20 06:05:19,125 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-20 06:05:19,490 INFO  L225             Difference]: With dead ends: 444233
[2021-11-20 06:05:19,490 INFO  L226             Difference]: Without dead ends: 253526
[2021-11-20 06:05:19,599 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
[2021-11-20 06:05:19,601 INFO  L933         BasicCegarLoop]: 3504 mSDtfsCounter, 1908 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 5198 mSolverCounterSat, 1181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1908 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 6379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1181 IncrementalHoareTripleChecker+Valid, 5198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time
[2021-11-20 06:05:19,602 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1908 Valid, 3833 Invalid, 6379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1181 Valid, 5198 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time]
[2021-11-20 06:05:19,827 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 253526 states.
[2021-11-20 06:05:22,407 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 253526 to 251827.
[2021-11-20 06:05:22,536 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 251827 states, 251826 states have (on average 1.058318044999325) internal successors, (266512), 251826 states have internal predecessors, (266512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:05:22,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 251827 states to 251827 states and 266512 transitions.
[2021-11-20 06:05:22,821 INFO  L78                 Accepts]: Start accepts. Automaton has 251827 states and 266512 transitions. Word has length 2232
[2021-11-20 06:05:22,822 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-20 06:05:22,822 INFO  L470      AbstractCegarLoop]: Abstraction has 251827 states and 266512 transitions.
[2021-11-20 06:05:22,822 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-20 06:05:22,823 INFO  L276                IsEmpty]: Start isEmpty. Operand 251827 states and 266512 transitions.