./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label29.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 839c364b
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label29.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a2beccb2b7dabaae49513ee594b88be31e666ab4b7ef55df434d01355696efd
--- Real Ultimate output ---
This is Ultimate 0.2.2-hotfix-svcomp22-839c364
[2021-12-06 22:45:24,841 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-12-06 22:45:24,843 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-12-06 22:45:24,874 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-12-06 22:45:24,875 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-12-06 22:45:24,876 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-12-06 22:45:24,878 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-12-06 22:45:24,880 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-12-06 22:45:24,882 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-12-06 22:45:24,883 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-12-06 22:45:24,884 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-12-06 22:45:24,886 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-12-06 22:45:24,886 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-12-06 22:45:24,887 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-12-06 22:45:24,889 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-12-06 22:45:24,890 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-12-06 22:45:24,891 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-12-06 22:45:24,892 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-12-06 22:45:24,895 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-12-06 22:45:24,897 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-12-06 22:45:24,899 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-12-06 22:45:24,901 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-12-06 22:45:24,902 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-12-06 22:45:24,903 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-12-06 22:45:24,907 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-12-06 22:45:24,907 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-12-06 22:45:24,908 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-12-06 22:45:24,909 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-12-06 22:45:24,909 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-12-06 22:45:24,911 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-12-06 22:45:24,911 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-12-06 22:45:24,912 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-12-06 22:45:24,913 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-12-06 22:45:24,914 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-12-06 22:45:24,915 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-12-06 22:45:24,915 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-12-06 22:45:24,916 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-12-06 22:45:24,916 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-12-06 22:45:24,916 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-12-06 22:45:24,917 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-12-06 22:45:24,918 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-12-06 22:45:24,919 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-12-06 22:45:24,937 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-12-06 22:45:24,937 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-12-06 22:45:24,937 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-12-06 22:45:24,937 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-12-06 22:45:24,938 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-12-06 22:45:24,938 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-12-06 22:45:24,938 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-12-06 22:45:24,938 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-12-06 22:45:24,939 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-12-06 22:45:24,939 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-12-06 22:45:24,939 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-12-06 22:45:24,939 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-12-06 22:45:24,939 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-12-06 22:45:24,939 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-12-06 22:45:24,939 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-12-06 22:45:24,939 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-12-06 22:45:24,940 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-12-06 22:45:24,940 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-12-06 22:45:24,940 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-12-06 22:45:24,940 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-12-06 22:45:24,940 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-12-06 22:45:24,940 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-12-06 22:45:24,940 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-12-06 22:45:24,940 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-12-06 22:45:24,941 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-06 22:45:24,941 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-12-06 22:45:24,941 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-12-06 22:45:24,941 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-12-06 22:45:24,941 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-12-06 22:45:24,941 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-12-06 22:45:24,941 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-12-06 22:45:24,942 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-12-06 22:45:24,942 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-12-06 22:45:24,942 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-12-06 22:45:24,942 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_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a2beccb2b7dabaae49513ee594b88be31e666ab4b7ef55df434d01355696efd
[2021-12-06 22:45:25,138 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-12-06 22:45:25,154 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-12-06 22:45:25,156 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-12-06 22:45:25,157 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-12-06 22:45:25,157 INFO  L275        PluginConnector]: CDTParser initialized
[2021-12-06 22:45:25,158 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem07_label29.c
[2021-12-06 22:45:25,204 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/data/341b10bbf/96c0ab4293f94069b8db1175cfca2de3/FLAGa17f92e86
[2021-12-06 22:45:26,536 INFO  L306              CDTParser]: Found 1 translation units.
[2021-12-06 22:45:26,537 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/sv-benchmarks/c/eca-rers2012/Problem07_label29.c
[2021-12-06 22:45:26,708 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/data/341b10bbf/96c0ab4293f94069b8db1175cfca2de3/FLAGa17f92e86
[2021-12-06 22:45:26,727 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/data/341b10bbf/96c0ab4293f94069b8db1175cfca2de3
[2021-12-06 22:45:26,728 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-12-06 22:45:26,729 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-12-06 22:45:26,730 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-12-06 22:45:26,730 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-12-06 22:45:26,733 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-12-06 22:45:26,733 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:45:26" (1/1) ...
[2021-12-06 22:45:26,734 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29aa35e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:26, skipping insertion in model container
[2021-12-06 22:45:26,734 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:45:26" (1/1) ...
[2021-12-06 22:45:26,739 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-12-06 22:45:27,356 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-12-06 22:45:37,342 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_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/sv-benchmarks/c/eca-rers2012/Problem07_label29.c[2774953,2774966]
[2021-12-06 22:45:37,399 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-06 22:45:37,406 INFO  L203         MainTranslator]: Completed pre-run
[2021-12-06 22:45:43,532 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_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/sv-benchmarks/c/eca-rers2012/Problem07_label29.c[2774953,2774966]
[2021-12-06 22:45:43,536 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-06 22:45:44,210 INFO  L208         MainTranslator]: Completed translation
[2021-12-06 22:45:44,210 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44 WrapperNode
[2021-12-06 22:45:44,210 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-12-06 22:45:44,211 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-12-06 22:45:44,211 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-12-06 22:45:44,211 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-12-06 22:45:44,216 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:44,561 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:45,836 INFO  L137                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83773
[2021-12-06 22:45:45,836 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-12-06 22:45:45,837 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-12-06 22:45:45,837 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-12-06 22:45:45,837 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-12-06 22:45:45,844 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:45,844 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:46,036 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:46,037 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:46,485 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:46,687 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:46,794 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:47,072 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-12-06 22:45:47,073 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-12-06 22:45:47,073 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-12-06 22:45:47,073 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-12-06 22:45:47,074 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (1/1) ...
[2021-12-06 22:45:47,081 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-06 22:45:47,090 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/z3
[2021-12-06 22:45:47,101 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-12-06 22:45:47,104 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3903e52d-b3ba-4e7a-a125-8f66ad02f0fb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-12-06 22:45:47,136 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-12-06 22:45:47,136 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-12-06 22:45:47,136 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-12-06 22:45:47,136 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-12-06 22:45:47,243 INFO  L236             CfgBuilder]: Building ICFG
[2021-12-06 22:45:47,244 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-12-06 22:46:10,907 INFO  L277             CfgBuilder]: Performing block encoding
[2021-12-06 22:46:10,953 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-12-06 22:46:10,953 INFO  L301             CfgBuilder]: Removed 1 assume(true) statements.
[2021-12-06 22:46:10,962 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:46:10 BoogieIcfgContainer
[2021-12-06 22:46:10,962 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-12-06 22:46:10,963 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-12-06 22:46:10,963 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-12-06 22:46:10,965 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-12-06 22:46:10,966 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:45:26" (1/3) ...
[2021-12-06 22:46:10,966 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415ffbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:46:10, skipping insertion in model container
[2021-12-06 22:46:10,966 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:44" (2/3) ...
[2021-12-06 22:46:10,966 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415ffbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:46:10, skipping insertion in model container
[2021-12-06 22:46:10,966 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:46:10" (3/3) ...
[2021-12-06 22:46:10,967 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem07_label29.c
[2021-12-06 22:46:10,971 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-12-06 22:46:10,971 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-12-06 22:46:11,026 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-12-06 22:46:11,031 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-12-06 22:46:11,031 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-12-06 22:46:11,140 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 10257 states, 10255 states have (on average 1.9892735251097027) internal successors, (20400), 10256 states have internal predecessors, (20400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:46:11,683 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10135
[2021-12-06 22:46:11,683 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:46:11,689 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-12-06 22:46:11,692 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:46:11,699 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:46:11,705 INFO  L85        PathProgramCache]: Analyzing trace with hash -242766086, now seen corresponding path program 1 times
[2021-12-06 22:46:11,711 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:46:11,712 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955548364]
[2021-12-06 22:46:11,715 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:46:11,715 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:46:13,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:46:33,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 22:46:33,201 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:46:33,201 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955548364]
[2021-12-06 22:46:33,202 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955548364] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:46:33,202 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:46:33,203 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:46:33,205 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020038093]
[2021-12-06 22:46:33,205 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:46:33,218 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:46:33,218 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:46:33,238 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:46:33,239 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:46:33,263 INFO  L87              Difference]: Start difference. First operand  has 10257 states, 10255 states have (on average 1.9892735251097027) internal successors, (20400), 10256 states have internal predecessors, (20400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 3 states, 3 states have (on average 3378.0) internal successors, (10134), 2 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:46:56,647 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:46:56,647 INFO  L93              Difference]: Finished difference Result 30705 states and 61134 transitions.
[2021-12-06 22:46:56,648 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:46:56,651 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3378.0) internal successors, (10134), 2 states have internal predecessors, (10134), 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 10134
[2021-12-06 22:46:56,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:46:56,771 INFO  L225             Difference]: With dead ends: 30705
[2021-12-06 22:46:56,772 INFO  L226             Difference]: Without dead ends: 20384
[2021-12-06 22:46:56,786 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:46:56,789 INFO  L933         BasicCegarLoop]: 4840 mSDtfsCounter, 3100 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 29575 mSolverCounterSat, 11263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3100 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 40838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11263 IncrementalHoareTripleChecker+Valid, 29575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time
[2021-12-06 22:46:56,790 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3100 Valid, 4893 Invalid, 40838 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11263 Valid, 29575 Invalid, 0 Unknown, 0 Unchecked, 22.9s Time]
[2021-12-06 22:46:56,827 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20384 states.
[2021-12-06 22:46:57,187 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20384 to 20384.
[2021-12-06 22:46:57,219 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20384 states, 20383 states have (on average 1.7562674778001275) internal successors, (35798), 20383 states have internal predecessors, (35798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:46:57,270 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20384 states to 20384 states and 35798 transitions.
[2021-12-06 22:46:57,272 INFO  L78                 Accepts]: Start accepts. Automaton has 20384 states and 35798 transitions. Word has length 10134
[2021-12-06 22:46:57,286 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:46:57,286 INFO  L470      AbstractCegarLoop]: Abstraction has 20384 states and 35798 transitions.
[2021-12-06 22:46:57,288 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3378.0) internal successors, (10134), 2 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:46:57,289 INFO  L276                IsEmpty]: Start isEmpty. Operand 20384 states and 35798 transitions.
[2021-12-06 22:46:57,991 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10141
[2021-12-06 22:46:57,992 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:46:57,996 INFO  L514         BasicCegarLoop]: trace histogram [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, 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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]
[2021-12-06 22:46:57,997 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-12-06 22:46:57,997 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:46:57,998 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:46:58,003 INFO  L85        PathProgramCache]: Analyzing trace with hash -759873475, now seen corresponding path program 1 times
[2021-12-06 22:46:58,004 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:46:58,004 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481429664]
[2021-12-06 22:46:58,006 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:46:58,006 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:46:58,805 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:47:16,550 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 22:47:16,551 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:47:16,551 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481429664]
[2021-12-06 22:47:16,551 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481429664] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:47:16,551 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:47:16,552 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:47:16,553 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436186435]
[2021-12-06 22:47:16,553 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:47:16,566 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:47:16,566 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:47:16,567 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:47:16,567 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:47:16,570 INFO  L87              Difference]: Start difference. First operand 20384 states and 35798 transitions. Second operand  has 3 states, 3 states have (on average 3380.0) internal successors, (10140), 2 states have internal predecessors, (10140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:47:39,734 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:47:39,734 INFO  L93              Difference]: Finished difference Result 61146 states and 107389 transitions.
[2021-12-06 22:47:39,734 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:47:39,736 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3380.0) internal successors, (10140), 2 states have internal predecessors, (10140), 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 10140
[2021-12-06 22:47:39,736 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:47:39,805 INFO  L225             Difference]: With dead ends: 61146
[2021-12-06 22:47:39,805 INFO  L226             Difference]: Without dead ends: 40764
[2021-12-06 22:47:39,822 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:47:39,823 INFO  L933         BasicCegarLoop]: 4819 mSDtfsCounter, 13685 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28825 mSolverCounterSat, 11677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13685 SdHoareTripleChecker+Valid, 4868 SdHoareTripleChecker+Invalid, 40502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11677 IncrementalHoareTripleChecker+Valid, 28825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time
[2021-12-06 22:47:39,823 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [13685 Valid, 4868 Invalid, 40502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11677 Valid, 28825 Invalid, 0 Unknown, 0 Unchecked, 22.7s Time]
[2021-12-06 22:47:39,867 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40764 states.
[2021-12-06 22:47:40,330 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40764 to 40764.
[2021-12-06 22:47:40,364 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40764 states, 40763 states have (on average 1.578514829624905) internal successors, (64345), 40763 states have internal predecessors, (64345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:47:40,422 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40764 states to 40764 states and 64345 transitions.
[2021-12-06 22:47:40,422 INFO  L78                 Accepts]: Start accepts. Automaton has 40764 states and 64345 transitions. Word has length 10140
[2021-12-06 22:47:40,424 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:47:40,424 INFO  L470      AbstractCegarLoop]: Abstraction has 40764 states and 64345 transitions.
[2021-12-06 22:47:40,425 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3380.0) internal successors, (10140), 2 states have internal predecessors, (10140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:47:40,426 INFO  L276                IsEmpty]: Start isEmpty. Operand 40764 states and 64345 transitions.
[2021-12-06 22:47:41,054 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10169
[2021-12-06 22:47:41,054 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:47:41,059 INFO  L514         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-12-06 22:47:41,059 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-12-06 22:47:41,060 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:47:41,060 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:47:41,063 INFO  L85        PathProgramCache]: Analyzing trace with hash -1924330327, now seen corresponding path program 1 times
[2021-12-06 22:47:41,063 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:47:41,063 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782947233]
[2021-12-06 22:47:41,064 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:47:41,064 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:47:41,889 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:47:58,504 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2021-12-06 22:47:58,504 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:47:58,504 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782947233]
[2021-12-06 22:47:58,504 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782947233] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:47:58,504 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:47:58,506 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:47:58,506 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582490787]
[2021-12-06 22:47:58,506 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:47:58,514 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:47:58,514 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:47:58,514 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:47:58,514 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:47:58,516 INFO  L87              Difference]: Start difference. First operand 40764 states and 64345 transitions. Second operand  has 3 states, 3 states have (on average 3387.6666666666665) internal successors, (10163), 2 states have internal predecessors, (10163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:48:22,801 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:48:22,801 INFO  L93              Difference]: Finished difference Result 122286 states and 193030 transitions.
[2021-12-06 22:48:22,801 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:48:22,802 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3387.6666666666665) internal successors, (10163), 2 states have internal predecessors, (10163), 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 10168
[2021-12-06 22:48:22,803 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:48:22,880 INFO  L225             Difference]: With dead ends: 122286
[2021-12-06 22:48:22,880 INFO  L226             Difference]: Without dead ends: 81524
[2021-12-06 22:48:22,921 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:48:22,923 INFO  L933         BasicCegarLoop]: 9509 mSDtfsCounter, 10242 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32553 mSolverCounterSat, 9364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10242 SdHoareTripleChecker+Valid, 9559 SdHoareTripleChecker+Invalid, 41917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9364 IncrementalHoareTripleChecker+Valid, 32553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time
[2021-12-06 22:48:22,923 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [10242 Valid, 9559 Invalid, 41917 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9364 Valid, 32553 Invalid, 0 Unknown, 0 Unchecked, 23.7s Time]
[2021-12-06 22:48:22,976 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81524 states.
[2021-12-06 22:48:23,567 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81524 to 81524.
[2021-12-06 22:48:23,626 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 81524 states, 81523 states have (on average 1.3585981870147075) internal successors, (110757), 81523 states have internal predecessors, (110757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:48:23,734 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81524 states to 81524 states and 110757 transitions.
[2021-12-06 22:48:23,735 INFO  L78                 Accepts]: Start accepts. Automaton has 81524 states and 110757 transitions. Word has length 10168
[2021-12-06 22:48:23,737 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:48:23,737 INFO  L470      AbstractCegarLoop]: Abstraction has 81524 states and 110757 transitions.
[2021-12-06 22:48:23,738 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3387.6666666666665) internal successors, (10163), 2 states have internal predecessors, (10163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:48:23,738 INFO  L276                IsEmpty]: Start isEmpty. Operand 81524 states and 110757 transitions.
[2021-12-06 22:48:24,387 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10172
[2021-12-06 22:48:24,387 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:48:24,392 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-12-06 22:48:24,392 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-12-06 22:48:24,392 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:48:24,393 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:48:24,395 INFO  L85        PathProgramCache]: Analyzing trace with hash -1786225038, now seen corresponding path program 1 times
[2021-12-06 22:48:24,395 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:48:24,396 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440211041]
[2021-12-06 22:48:24,396 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:48:24,397 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:48:25,308 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:48:41,022 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 22:48:41,023 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:48:41,023 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440211041]
[2021-12-06 22:48:41,023 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440211041] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:48:41,023 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:48:41,024 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:48:41,025 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998710443]
[2021-12-06 22:48:41,025 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:48:41,031 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:48:41,031 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:48:41,031 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:48:41,032 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:48:41,033 INFO  L87              Difference]: Start difference. First operand 81524 states and 110757 transitions. Second operand  has 3 states, 3 states have (on average 3390.3333333333335) internal successors, (10171), 2 states have internal predecessors, (10171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:49:06,221 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:49:06,221 INFO  L93              Difference]: Finished difference Result 244566 states and 332266 transitions.
[2021-12-06 22:49:06,221 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:49:06,223 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3390.3333333333335) internal successors, (10171), 2 states have internal predecessors, (10171), 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 10171
[2021-12-06 22:49:06,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:49:06,421 INFO  L225             Difference]: With dead ends: 244566
[2021-12-06 22:49:06,421 INFO  L226             Difference]: Without dead ends: 163044
[2021-12-06 22:49:06,454 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:49:06,456 INFO  L933         BasicCegarLoop]: 7745 mSDtfsCounter, 12088 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 27826 mSolverCounterSat, 13030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12088 SdHoareTripleChecker+Valid, 7794 SdHoareTripleChecker+Invalid, 40856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13030 IncrementalHoareTripleChecker+Valid, 27826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time
[2021-12-06 22:49:06,457 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [12088 Valid, 7794 Invalid, 40856 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13030 Valid, 27826 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time]
[2021-12-06 22:49:06,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 163044 states.
[2021-12-06 22:49:07,718 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 163044 to 163044.
[2021-12-06 22:49:07,901 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 163044 states, 163043 states have (on average 1.2584716915169618) internal successors, (205185), 163043 states have internal predecessors, (205185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:49:08,182 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 163044 states to 163044 states and 205185 transitions.
[2021-12-06 22:49:08,183 INFO  L78                 Accepts]: Start accepts. Automaton has 163044 states and 205185 transitions. Word has length 10171
[2021-12-06 22:49:08,184 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:49:08,185 INFO  L470      AbstractCegarLoop]: Abstraction has 163044 states and 205185 transitions.
[2021-12-06 22:49:08,186 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3390.3333333333335) internal successors, (10171), 2 states have internal predecessors, (10171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:49:08,186 INFO  L276                IsEmpty]: Start isEmpty. Operand 163044 states and 205185 transitions.
[2021-12-06 22:49:08,944 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10204
[2021-12-06 22:49:08,944 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:49:08,949 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-12-06 22:49:08,949 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-12-06 22:49:08,949 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:49:08,950 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:49:08,953 INFO  L85        PathProgramCache]: Analyzing trace with hash -1631713758, now seen corresponding path program 1 times
[2021-12-06 22:49:08,953 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:49:08,954 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656953770]
[2021-12-06 22:49:08,955 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:49:08,955 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:49:09,895 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:49:25,196 INFO  L134       CoverageAnalysis]: Checked inductivity of 68 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 22:49:25,196 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:49:25,196 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656953770]
[2021-12-06 22:49:25,197 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656953770] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:49:25,197 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:49:25,198 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:49:25,198 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601729369]
[2021-12-06 22:49:25,198 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:49:25,205 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:49:25,205 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:49:25,206 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:49:25,206 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:49:25,208 INFO  L87              Difference]: Start difference. First operand 163044 states and 205185 transitions. Second operand  has 3 states, 3 states have (on average 3401.0) internal successors, (10203), 2 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:49:50,137 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:49:50,138 INFO  L93              Difference]: Finished difference Result 489126 states and 615550 transitions.
[2021-12-06 22:49:50,138 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:49:50,139 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3401.0) internal successors, (10203), 2 states have internal predecessors, (10203), 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 10203
[2021-12-06 22:49:50,139 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:49:50,471 INFO  L225             Difference]: With dead ends: 489126
[2021-12-06 22:49:50,472 INFO  L226             Difference]: Without dead ends: 326084
[2021-12-06 22:49:50,535 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:49:50,536 INFO  L933         BasicCegarLoop]: 6788 mSDtfsCounter, 12407 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29266 mSolverCounterSat, 11755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12407 SdHoareTripleChecker+Valid, 6837 SdHoareTripleChecker+Invalid, 41021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11755 IncrementalHoareTripleChecker+Valid, 29266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time
[2021-12-06 22:49:50,536 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [12407 Valid, 6837 Invalid, 41021 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11755 Valid, 29266 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time]
[2021-12-06 22:49:50,737 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 326084 states.
[2021-12-06 22:49:53,244 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 326084 to 326084.
[2021-12-06 22:49:53,444 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 326084 states, 326083 states have (on average 1.1961525133171615) internal successors, (390045), 326083 states have internal predecessors, (390045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:49:54,098 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 326084 states to 326084 states and 390045 transitions.
[2021-12-06 22:49:54,098 INFO  L78                 Accepts]: Start accepts. Automaton has 326084 states and 390045 transitions. Word has length 10203
[2021-12-06 22:49:54,100 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:49:54,100 INFO  L470      AbstractCegarLoop]: Abstraction has 326084 states and 390045 transitions.
[2021-12-06 22:49:54,102 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3401.0) internal successors, (10203), 2 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:49:54,102 INFO  L276                IsEmpty]: Start isEmpty. Operand 326084 states and 390045 transitions.
[2021-12-06 22:49:55,095 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10322
[2021-12-06 22:49:55,095 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:49:55,099 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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[2021-12-06 22:49:55,099 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-12-06 22:49:55,099 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:49:55,099 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:49:55,102 INFO  L85        PathProgramCache]: Analyzing trace with hash 2102377083, now seen corresponding path program 1 times
[2021-12-06 22:49:55,102 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:49:55,102 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008906001]
[2021-12-06 22:49:55,103 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:49:55,103 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:49:55,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:50:12,090 INFO  L134       CoverageAnalysis]: Checked inductivity of 186 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 22:50:12,090 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:50:12,090 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008906001]
[2021-12-06 22:50:12,091 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008906001] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:50:12,091 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:50:12,092 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:50:12,092 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928656501]
[2021-12-06 22:50:12,092 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:50:12,099 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:50:12,099 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:50:12,100 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:50:12,100 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:50:12,102 INFO  L87              Difference]: Start difference. First operand 326084 states and 390045 transitions. Second operand  has 3 states, 3 states have (on average 3440.3333333333335) internal successors, (10321), 2 states have internal predecessors, (10321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:50:38,233 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:50:38,233 INFO  L93              Difference]: Finished difference Result 978246 states and 1170130 transitions.
[2021-12-06 22:50:38,234 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:50:38,235 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3440.3333333333335) internal successors, (10321), 2 states have internal predecessors, (10321), 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 10321
[2021-12-06 22:50:38,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:50:38,937 INFO  L225             Difference]: With dead ends: 978246
[2021-12-06 22:50:38,937 INFO  L226             Difference]: Without dead ends: 652164
[2021-12-06 22:50:39,080 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:50:39,081 INFO  L933         BasicCegarLoop]: 9000 mSDtfsCounter, 10749 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 31677 mSolverCounterSat, 10501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10749 SdHoareTripleChecker+Valid, 9049 SdHoareTripleChecker+Invalid, 42178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10501 IncrementalHoareTripleChecker+Valid, 31677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time
[2021-12-06 22:50:39,081 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [10749 Valid, 9049 Invalid, 42178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10501 Valid, 31677 Invalid, 0 Unknown, 0 Unchecked, 23.6s Time]
[2021-12-06 22:50:39,582 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 652164 states.
[2021-12-06 22:50:44,807 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 652164 to 652164.
[2021-12-06 22:50:45,027 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 652164 states, 652163 states have (on average 1.14939823326377) internal successors, (749595), 652163 states have internal predecessors, (749595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:50:46,040 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 652164 states to 652164 states and 749595 transitions.
[2021-12-06 22:50:46,040 INFO  L78                 Accepts]: Start accepts. Automaton has 652164 states and 749595 transitions. Word has length 10321
[2021-12-06 22:50:46,041 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:50:46,041 INFO  L470      AbstractCegarLoop]: Abstraction has 652164 states and 749595 transitions.
[2021-12-06 22:50:46,043 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3440.3333333333335) internal successors, (10321), 2 states have internal predecessors, (10321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:50:46,043 INFO  L276                IsEmpty]: Start isEmpty. Operand 652164 states and 749595 transitions.
[2021-12-06 22:50:47,494 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10691
[2021-12-06 22:50:47,494 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:50:47,497 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2021-12-06 22:50:47,497 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2021-12-06 22:50:47,497 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:50:47,497 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:50:47,499 INFO  L85        PathProgramCache]: Analyzing trace with hash 2003590035, now seen corresponding path program 1 times
[2021-12-06 22:50:47,499 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:50:47,499 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790575836]
[2021-12-06 22:50:47,500 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:50:47,500 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:50:48,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:51:05,692 INFO  L134       CoverageAnalysis]: Checked inductivity of 636 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2021-12-06 22:51:05,693 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:51:05,693 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790575836]
[2021-12-06 22:51:05,693 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790575836] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:51:05,693 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:51:05,695 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:51:05,695 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075392702]
[2021-12-06 22:51:05,695 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:51:05,702 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:51:05,702 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:51:05,702 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:51:05,702 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:51:05,705 INFO  L87              Difference]: Start difference. First operand 652164 states and 749595 transitions. Second operand  has 3 states, 3 states have (on average 3535.6666666666665) internal successors, (10607), 2 states have internal predecessors, (10607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:51:33,964 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:51:33,965 INFO  L93              Difference]: Finished difference Result 1956486 states and 2248780 transitions.
[2021-12-06 22:51:33,965 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:51:33,966 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3535.6666666666665) internal successors, (10607), 2 states have internal predecessors, (10607), 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 10690
[2021-12-06 22:51:33,967 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:51:35,500 INFO  L225             Difference]: With dead ends: 1956486
[2021-12-06 22:51:35,500 INFO  L226             Difference]: Without dead ends: 1304324
[2021-12-06 22:51:35,719 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:51:35,719 INFO  L933         BasicCegarLoop]: 6002 mSDtfsCounter, 12123 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29861 mSolverCounterSat, 11034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12123 SdHoareTripleChecker+Valid, 6051 SdHoareTripleChecker+Invalid, 40895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11034 IncrementalHoareTripleChecker+Valid, 29861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time
[2021-12-06 22:51:35,720 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [12123 Valid, 6051 Invalid, 40895 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11034 Valid, 29861 Invalid, 0 Unknown, 0 Unchecked, 23.7s Time]
[2021-12-06 22:51:36,771 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1304324 states.
[2021-12-06 22:51:47,426 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304324 to 1304324.
[2021-12-06 22:51:48,197 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1304324 states, 1304323 states have (on average 1.1113282522810684) internal successors, (1449531), 1304323 states have internal predecessors, (1449531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:51:50,413 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1304324 states to 1304324 states and 1449531 transitions.
[2021-12-06 22:51:50,413 INFO  L78                 Accepts]: Start accepts. Automaton has 1304324 states and 1449531 transitions. Word has length 10690
[2021-12-06 22:51:50,414 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 22:51:50,414 INFO  L470      AbstractCegarLoop]: Abstraction has 1304324 states and 1449531 transitions.
[2021-12-06 22:51:50,415 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3535.6666666666665) internal successors, (10607), 2 states have internal predecessors, (10607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:51:50,415 INFO  L276                IsEmpty]: Start isEmpty. Operand 1304324 states and 1449531 transitions.
[2021-12-06 22:51:52,552 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11180
[2021-12-06 22:51:52,552 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 22:51:52,554 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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[2021-12-06 22:51:52,554 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2021-12-06 22:51:52,555 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 22:51:52,555 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 22:51:52,556 INFO  L85        PathProgramCache]: Analyzing trace with hash -1924110788, now seen corresponding path program 1 times
[2021-12-06 22:51:52,556 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 22:51:52,556 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711163408]
[2021-12-06 22:51:52,560 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 22:51:52,560 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 22:51:53,465 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 22:52:12,430 INFO  L134       CoverageAnalysis]: Checked inductivity of 1355 backedges. 1038 proven. 0 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked.
[2021-12-06 22:52:12,430 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 22:52:12,430 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711163408]
[2021-12-06 22:52:12,431 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711163408] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 22:52:12,431 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 22:52:12,432 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 22:52:12,432 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948476780]
[2021-12-06 22:52:12,433 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 22:52:12,437 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 22:52:12,437 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 22:52:12,437 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 22:52:12,438 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:52:12,440 INFO  L87              Difference]: Start difference. First operand 1304324 states and 1449531 transitions. Second operand  has 3 states, 3 states have (on average 3635.0) internal successors, (10905), 2 states have internal predecessors, (10905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 22:52:46,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 22:52:46,752 INFO  L93              Difference]: Finished difference Result 3882396 states and 4314730 transitions.
[2021-12-06 22:52:46,753 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 22:52:46,754 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3635.0) internal successors, (10905), 2 states have internal predecessors, (10905), 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 11179
[2021-12-06 22:52:46,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 22:52:50,089 INFO  L225             Difference]: With dead ends: 3882396
[2021-12-06 22:52:50,089 INFO  L226             Difference]: Without dead ends: 2578074
[2021-12-06 22:52:50,734 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 22:52:50,734 INFO  L933         BasicCegarLoop]: 5909 mSDtfsCounter, 9683 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 31792 mSolverCounterSat, 11564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9683 SdHoareTripleChecker+Valid, 5958 SdHoareTripleChecker+Invalid, 43356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11564 IncrementalHoareTripleChecker+Valid, 31792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time
[2021-12-06 22:52:50,735 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [9683 Valid, 5958 Invalid, 43356 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11564 Valid, 31792 Invalid, 0 Unknown, 0 Unchecked, 25.5s Time]
[2021-12-06 22:52:53,122 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2578074 states.
[2021-12-06 22:53:15,026 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578074 to 2578074.