./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem05_label34.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_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/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_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem05_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/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_abb7e2a6-2742-4247-a606-049ca3fa9a2c/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 d3242806815521ee70a6d1a119a3f5b365a809b559dd29a60629a3443406a51b
--- Real Ultimate output ---
This is Ultimate 0.2.2-hotfix-svcomp22-839c364
[2021-12-06 20:35:12,051 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-12-06 20:35:12,052 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-12-06 20:35:12,083 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-12-06 20:35:12,084 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-12-06 20:35:12,085 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-12-06 20:35:12,086 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-12-06 20:35:12,088 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-12-06 20:35:12,089 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-12-06 20:35:12,090 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-12-06 20:35:12,091 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-12-06 20:35:12,092 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-12-06 20:35:12,092 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-12-06 20:35:12,093 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-12-06 20:35:12,094 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-12-06 20:35:12,096 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-12-06 20:35:12,097 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-12-06 20:35:12,097 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-12-06 20:35:12,099 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-12-06 20:35:12,101 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-12-06 20:35:12,103 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-12-06 20:35:12,104 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-12-06 20:35:12,105 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-12-06 20:35:12,106 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-12-06 20:35:12,108 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-12-06 20:35:12,109 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-12-06 20:35:12,109 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-12-06 20:35:12,110 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-12-06 20:35:12,110 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-12-06 20:35:12,111 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-12-06 20:35:12,112 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-12-06 20:35:12,112 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-12-06 20:35:12,113 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-12-06 20:35:12,114 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-12-06 20:35:12,114 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-12-06 20:35:12,114 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-12-06 20:35:12,115 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-12-06 20:35:12,115 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-12-06 20:35:12,115 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-12-06 20:35:12,116 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-12-06 20:35:12,116 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-12-06 20:35:12,117 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-12-06 20:35:12,135 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-12-06 20:35:12,135 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-12-06 20:35:12,135 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-12-06 20:35:12,136 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-12-06 20:35:12,136 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-12-06 20:35:12,136 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-12-06 20:35:12,137 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-12-06 20:35:12,137 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-12-06 20:35:12,137 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-12-06 20:35:12,137 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-12-06 20:35:12,137 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-12-06 20:35:12,137 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-12-06 20:35:12,137 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-12-06 20:35:12,138 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-12-06 20:35:12,139 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-12-06 20:35:12,139 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-12-06 20:35:12,139 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-12-06 20:35:12,139 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-06 20:35:12,139 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-12-06 20:35:12,139 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-12-06 20:35:12,139 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-12-06 20:35:12,140 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-12-06 20:35:12,140 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-12-06 20:35:12,140 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-12-06 20:35:12,140 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-12-06 20:35:12,140 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-12-06 20:35:12,140 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-12-06 20:35:12,140 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_abb7e2a6-2742-4247-a606-049ca3fa9a2c/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_abb7e2a6-2742-4247-a606-049ca3fa9a2c/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 -> d3242806815521ee70a6d1a119a3f5b365a809b559dd29a60629a3443406a51b
[2021-12-06 20:35:12,333 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-12-06 20:35:12,348 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-12-06 20:35:12,350 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-12-06 20:35:12,350 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-12-06 20:35:12,351 INFO  L275        PluginConnector]: CDTParser initialized
[2021-12-06 20:35:12,352 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem05_label34.c
[2021-12-06 20:35:12,395 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/data/57f8e8a77/68c08a4f299e4119ae3420d0d64259ee/FLAG82cede819
[2021-12-06 20:35:13,062 INFO  L306              CDTParser]: Found 1 translation units.
[2021-12-06 20:35:13,063 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/sv-benchmarks/c/eca-rers2012/Problem05_label34.c
[2021-12-06 20:35:13,103 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/data/57f8e8a77/68c08a4f299e4119ae3420d0d64259ee/FLAG82cede819
[2021-12-06 20:35:13,454 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/data/57f8e8a77/68c08a4f299e4119ae3420d0d64259ee
[2021-12-06 20:35:13,462 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-12-06 20:35:13,467 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-12-06 20:35:13,471 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-12-06 20:35:13,472 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-12-06 20:35:13,481 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-12-06 20:35:13,483 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:35:13" (1/1) ...
[2021-12-06 20:35:13,487 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be7044e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:13, skipping insertion in model container
[2021-12-06 20:35:13,488 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:35:13" (1/1) ...
[2021-12-06 20:35:13,513 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-12-06 20:35:13,708 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-12-06 20:35:14,998 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_abb7e2a6-2742-4247-a606-049ca3fa9a2c/sv-benchmarks/c/eca-rers2012/Problem05_label34.c[381064,381077]
[2021-12-06 20:35:15,011 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-06 20:35:15,017 INFO  L203         MainTranslator]: Completed pre-run
[2021-12-06 20:35:15,848 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_abb7e2a6-2742-4247-a606-049ca3fa9a2c/sv-benchmarks/c/eca-rers2012/Problem05_label34.c[381064,381077]
[2021-12-06 20:35:15,850 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-06 20:35:15,892 INFO  L208         MainTranslator]: Completed translation
[2021-12-06 20:35:15,893 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15 WrapperNode
[2021-12-06 20:35:15,893 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-12-06 20:35:15,893 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-12-06 20:35:15,894 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-12-06 20:35:15,894 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-12-06 20:35:15,900 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:15,977 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,258 INFO  L137                Inliner]: procedures = 21, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 12346
[2021-12-06 20:35:16,258 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-12-06 20:35:16,259 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-12-06 20:35:16,259 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-12-06 20:35:16,259 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-12-06 20:35:16,266 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,267 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,310 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,311 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,426 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,463 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,477 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,511 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-12-06 20:35:16,512 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-12-06 20:35:16,512 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-12-06 20:35:16,512 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-12-06 20:35:16,513 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (1/1) ...
[2021-12-06 20:35:16,563 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-06 20:35:16,573 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3
[2021-12-06 20:35:16,582 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-12-06 20:35:16,584 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-12-06 20:35:16,619 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-12-06 20:35:16,619 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-12-06 20:35:16,619 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-12-06 20:35:16,619 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-12-06 20:35:16,690 INFO  L236             CfgBuilder]: Building ICFG
[2021-12-06 20:35:16,692 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-12-06 20:35:20,950 INFO  L277             CfgBuilder]: Performing block encoding
[2021-12-06 20:35:20,970 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-12-06 20:35:20,970 INFO  L301             CfgBuilder]: Removed 1 assume(true) statements.
[2021-12-06 20:35:20,973 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:35:20 BoogieIcfgContainer
[2021-12-06 20:35:20,974 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-12-06 20:35:20,975 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-12-06 20:35:20,975 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-12-06 20:35:20,978 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-12-06 20:35:20,978 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:35:13" (1/3) ...
[2021-12-06 20:35:20,979 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8543a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:35:20, skipping insertion in model container
[2021-12-06 20:35:20,979 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:35:15" (2/3) ...
[2021-12-06 20:35:20,979 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8543a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:35:20, skipping insertion in model container
[2021-12-06 20:35:20,979 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:35:20" (3/3) ...
[2021-12-06 20:35:20,980 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem05_label34.c
[2021-12-06 20:35:20,984 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-12-06 20:35:20,984 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-12-06 20:35:21,027 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-12-06 20:35:21,032 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 20:35:21,032 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-12-06 20:35:21,073 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 2185 states, 2183 states have (on average 1.8708199725148877) internal successors, (4084), 2184 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-12-06 20:35:21,189 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1684
[2021-12-06 20:35:21,190 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:35:21,191 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:35:21,192 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:35:21,196 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:35:21,197 INFO  L85        PathProgramCache]: Analyzing trace with hash -1073947391, now seen corresponding path program 1 times
[2021-12-06 20:35:21,204 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:35:21,204 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604263538]
[2021-12-06 20:35:21,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:35:21,205 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:35:21,686 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:35:23,103 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 20:35:23,104 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:35:23,104 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604263538]
[2021-12-06 20:35:23,104 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604263538] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:35:23,104 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:35:23,105 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:35:23,106 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850984733]
[2021-12-06 20:35:23,106 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:35:23,112 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-06 20:35:23,112 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:35:23,131 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-06 20:35:23,132 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-12-06 20:35:23,138 INFO  L87              Difference]: Start difference. First operand  has 2185 states, 2183 states have (on average 1.8708199725148877) internal successors, (4084), 2184 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 420.75) internal successors, (1683), 3 states have internal predecessors, (1683), 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 20:35:33,094 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:35:33,094 INFO  L93              Difference]: Finished difference Result 9571 states and 18469 transitions.
[2021-12-06 20:35:33,095 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-12-06 20:35:33,096 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 420.75) internal successors, (1683), 3 states have internal predecessors, (1683), 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 1683
[2021-12-06 20:35:33,101 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:35:33,145 INFO  L225             Difference]: With dead ends: 9571
[2021-12-06 20:35:33,145 INFO  L226             Difference]: Without dead ends: 7316
[2021-12-06 20:35:33,153 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-12-06 20:35:33,155 INFO  L933         BasicCegarLoop]: 2468 mSDtfsCounter, 3706 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 15542 mSolverCounterSat, 4555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3706 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 20097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4555 IncrementalHoareTripleChecker+Valid, 15542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time
[2021-12-06 20:35:33,156 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3706 Valid, 2851 Invalid, 20097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4555 Valid, 15542 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time]
[2021-12-06 20:35:33,177 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7316 states.
[2021-12-06 20:35:33,293 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7316 to 5591.
[2021-12-06 20:35:33,302 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5591 states, 5590 states have (on average 1.6051878354203934) internal successors, (8973), 5590 states have internal predecessors, (8973), 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 20:35:33,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5591 states to 5591 states and 8973 transitions.
[2021-12-06 20:35:33,318 INFO  L78                 Accepts]: Start accepts. Automaton has 5591 states and 8973 transitions. Word has length 1683
[2021-12-06 20:35:33,321 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:35:33,321 INFO  L470      AbstractCegarLoop]: Abstraction has 5591 states and 8973 transitions.
[2021-12-06 20:35:33,322 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 420.75) internal successors, (1683), 3 states have internal predecessors, (1683), 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 20:35:33,322 INFO  L276                IsEmpty]: Start isEmpty. Operand 5591 states and 8973 transitions.
[2021-12-06 20:35:33,541 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1702
[2021-12-06 20:35:33,542 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:35:33,543 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:35:33,543 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-12-06 20:35:33,543 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:35:33,544 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:35:33,544 INFO  L85        PathProgramCache]: Analyzing trace with hash -1317038225, now seen corresponding path program 1 times
[2021-12-06 20:35:33,545 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:35:33,545 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693988176]
[2021-12-06 20:35:33,545 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:35:33,545 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:35:33,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:35:34,776 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 20:35:34,776 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:35:34,776 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693988176]
[2021-12-06 20:35:34,777 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693988176] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:35:34,777 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:35:34,777 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:35:34,777 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215661352]
[2021-12-06 20:35:34,777 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:35:34,780 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:35:34,780 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:35:34,780 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:35:34,781 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:34,782 INFO  L87              Difference]: Start difference. First operand 5591 states and 8973 transitions. Second operand  has 3 states, 3 states have (on average 567.0) internal successors, (1701), 3 states have internal predecessors, (1701), 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 20:35:38,489 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:35:38,489 INFO  L93              Difference]: Finished difference Result 14731 states and 24743 transitions.
[2021-12-06 20:35:38,490 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:35:38,491 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 567.0) internal successors, (1701), 3 states have internal predecessors, (1701), 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 1701
[2021-12-06 20:35:38,493 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:35:38,530 INFO  L225             Difference]: With dead ends: 14731
[2021-12-06 20:35:38,530 INFO  L226             Difference]: Without dead ends: 9142
[2021-12-06 20:35:38,537 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:38,538 INFO  L933         BasicCegarLoop]: 3087 mSDtfsCounter, 372 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 5975 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 3515 SdHoareTripleChecker+Invalid, 6849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 5975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time
[2021-12-06 20:35:38,539 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 3515 Invalid, 6849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 5975 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time]
[2021-12-06 20:35:38,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9142 states.
[2021-12-06 20:35:38,671 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9142 to 9100.
[2021-12-06 20:35:38,683 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9100 states, 9099 states have (on average 1.569513133311353) internal successors, (14281), 9099 states have internal predecessors, (14281), 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 20:35:38,704 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 14281 transitions.
[2021-12-06 20:35:38,705 INFO  L78                 Accepts]: Start accepts. Automaton has 9100 states and 14281 transitions. Word has length 1701
[2021-12-06 20:35:38,707 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:35:38,707 INFO  L470      AbstractCegarLoop]: Abstraction has 9100 states and 14281 transitions.
[2021-12-06 20:35:38,708 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 567.0) internal successors, (1701), 3 states have internal predecessors, (1701), 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 20:35:38,708 INFO  L276                IsEmpty]: Start isEmpty. Operand 9100 states and 14281 transitions.
[2021-12-06 20:35:38,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1708
[2021-12-06 20:35:38,752 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:35:38,753 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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]
[2021-12-06 20:35:38,753 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-12-06 20:35:38,753 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:35:38,754 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:35:38,754 INFO  L85        PathProgramCache]: Analyzing trace with hash 799337656, now seen corresponding path program 1 times
[2021-12-06 20:35:38,755 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:35:38,755 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585298261]
[2021-12-06 20:35:38,755 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:35:38,755 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:35:38,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:35:39,279 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 20:35:39,279 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:35:39,279 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585298261]
[2021-12-06 20:35:39,279 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585298261] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:35:39,279 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:35:39,280 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:35:39,280 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243663402]
[2021-12-06 20:35:39,280 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:35:39,281 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:35:39,282 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:35:39,282 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:35:39,282 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:39,283 INFO  L87              Difference]: Start difference. First operand 9100 states and 14281 transitions. Second operand  has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 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 20:35:43,239 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:35:43,239 INFO  L93              Difference]: Finished difference Result 19969 states and 30414 transitions.
[2021-12-06 20:35:43,239 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:35:43,240 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 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 1707
[2021-12-06 20:35:43,240 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:35:43,277 INFO  L225             Difference]: With dead ends: 19969
[2021-12-06 20:35:43,277 INFO  L226             Difference]: Without dead ends: 10871
[2021-12-06 20:35:43,284 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:43,285 INFO  L933         BasicCegarLoop]: 3338 mSDtfsCounter, 1896 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 5173 mSolverCounterSat, 2113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 7286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2113 IncrementalHoareTripleChecker+Valid, 5173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2021-12-06 20:35:43,286 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1896 Valid, 3583 Invalid, 7286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2113 Valid, 5173 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2021-12-06 20:35:43,295 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10871 states.
[2021-12-06 20:35:43,393 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10802.
[2021-12-06 20:35:43,409 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10802 states, 10801 states have (on average 1.3394130173132117) internal successors, (14467), 10801 states have internal predecessors, (14467), 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 20:35:43,424 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10802 states to 10802 states and 14467 transitions.
[2021-12-06 20:35:43,424 INFO  L78                 Accepts]: Start accepts. Automaton has 10802 states and 14467 transitions. Word has length 1707
[2021-12-06 20:35:43,425 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:35:43,425 INFO  L470      AbstractCegarLoop]: Abstraction has 10802 states and 14467 transitions.
[2021-12-06 20:35:43,426 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 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 20:35:43,426 INFO  L276                IsEmpty]: Start isEmpty. Operand 10802 states and 14467 transitions.
[2021-12-06 20:35:43,452 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1709
[2021-12-06 20:35:43,452 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:35:43,453 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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]
[2021-12-06 20:35:43,453 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-12-06 20:35:43,454 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:35:43,454 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:35:43,455 INFO  L85        PathProgramCache]: Analyzing trace with hash -114921572, now seen corresponding path program 1 times
[2021-12-06 20:35:43,455 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:35:43,455 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142196168]
[2021-12-06 20:35:43,455 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:35:43,455 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:35:43,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:35:43,925 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 20:35:43,925 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:35:43,926 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142196168]
[2021-12-06 20:35:43,926 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142196168] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:35:43,926 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:35:43,926 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:35:43,927 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136225943]
[2021-12-06 20:35:43,927 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:35:43,929 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-06 20:35:43,929 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:35:43,930 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-06 20:35:43,930 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 20:35:43,930 INFO  L87              Difference]: Start difference. First operand 10802 states and 14467 transitions. Second operand  has 4 states, 4 states have (on average 427.0) internal successors, (1708), 3 states have internal predecessors, (1708), 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 20:35:49,647 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:35:49,647 INFO  L93              Difference]: Finished difference Result 31843 states and 43605 transitions.
[2021-12-06 20:35:49,647 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-06 20:35:49,647 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 427.0) internal successors, (1708), 3 states have internal predecessors, (1708), 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 1708
[2021-12-06 20:35:49,648 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:35:49,675 INFO  L225             Difference]: With dead ends: 31843
[2021-12-06 20:35:49,675 INFO  L226             Difference]: Without dead ends: 21043
[2021-12-06 20:35:49,686 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 20:35:49,687 INFO  L933         BasicCegarLoop]: 1577 mSDtfsCounter, 4058 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 9522 mSolverCounterSat, 2851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4058 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 12373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2851 IncrementalHoareTripleChecker+Valid, 9522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time
[2021-12-06 20:35:49,687 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4058 Valid, 2030 Invalid, 12373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2851 Valid, 9522 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time]
[2021-12-06 20:35:49,705 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21043 states.
[2021-12-06 20:35:49,865 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21043 to 21032.
[2021-12-06 20:35:49,882 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21032 states, 21031 states have (on average 1.2546241262897628) internal successors, (26386), 21031 states have internal predecessors, (26386), 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 20:35:49,904 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 26386 transitions.
[2021-12-06 20:35:49,904 INFO  L78                 Accepts]: Start accepts. Automaton has 21032 states and 26386 transitions. Word has length 1708
[2021-12-06 20:35:49,905 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:35:49,905 INFO  L470      AbstractCegarLoop]: Abstraction has 21032 states and 26386 transitions.
[2021-12-06 20:35:49,905 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 427.0) internal successors, (1708), 3 states have internal predecessors, (1708), 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 20:35:49,905 INFO  L276                IsEmpty]: Start isEmpty. Operand 21032 states and 26386 transitions.
[2021-12-06 20:35:49,942 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1767
[2021-12-06 20:35:49,943 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:35:49,944 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2021-12-06 20:35:49,944 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-12-06 20:35:49,944 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:35:49,944 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:35:49,945 INFO  L85        PathProgramCache]: Analyzing trace with hash 846900830, now seen corresponding path program 1 times
[2021-12-06 20:35:49,945 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:35:49,945 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467790277]
[2021-12-06 20:35:49,945 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:35:49,945 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:35:50,061 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:35:50,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 152 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked.
[2021-12-06 20:35:50,411 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:35:50,412 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467790277]
[2021-12-06 20:35:50,412 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467790277] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:35:50,412 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:35:50,412 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-06 20:35:50,412 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684406408]
[2021-12-06 20:35:50,412 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:35:50,414 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:35:50,414 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:35:50,414 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:35:50,414 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:50,415 INFO  L87              Difference]: Start difference. First operand 21032 states and 26386 transitions. Second operand  has 3 states, 3 states have (on average 576.3333333333334) internal successors, (1729), 2 states have internal predecessors, (1729), 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 20:35:53,797 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:35:53,797 INFO  L93              Difference]: Finished difference Result 52253 states and 64667 transitions.
[2021-12-06 20:35:53,798 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:35:53,798 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 576.3333333333334) internal successors, (1729), 2 states have internal predecessors, (1729), 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 1766
[2021-12-06 20:35:53,799 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:35:53,842 INFO  L225             Difference]: With dead ends: 52253
[2021-12-06 20:35:53,842 INFO  L226             Difference]: Without dead ends: 31223
[2021-12-06 20:35:53,898 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 20:35:53,899 INFO  L933         BasicCegarLoop]: 1076 mSDtfsCounter, 3155 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3155 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 5981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time
[2021-12-06 20:35:53,899 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3155 Valid, 1162 Invalid, 5981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1208 Valid, 4773 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time]
[2021-12-06 20:35:53,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31223 states.
[2021-12-06 20:35:54,108 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31223 to 31223.
[2021-12-06 20:35:54,130 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31223 states, 31222 states have (on average 1.1670296585740825) internal successors, (36437), 31222 states have internal predecessors, (36437), 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 20:35:54,164 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31223 states to 31223 states and 36437 transitions.
[2021-12-06 20:35:54,164 INFO  L78                 Accepts]: Start accepts. Automaton has 31223 states and 36437 transitions. Word has length 1766
[2021-12-06 20:35:54,165 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:35:54,165 INFO  L470      AbstractCegarLoop]: Abstraction has 31223 states and 36437 transitions.
[2021-12-06 20:35:54,165 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 576.3333333333334) internal successors, (1729), 2 states have internal predecessors, (1729), 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 20:35:54,166 INFO  L276                IsEmpty]: Start isEmpty. Operand 31223 states and 36437 transitions.
[2021-12-06 20:35:54,210 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1823
[2021-12-06 20:35:54,210 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:35:54,211 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:35:54,211 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-12-06 20:35:54,211 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:35:54,212 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:35:54,212 INFO  L85        PathProgramCache]: Analyzing trace with hash -241657795, now seen corresponding path program 1 times
[2021-12-06 20:35:54,212 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:35:54,212 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417685599]
[2021-12-06 20:35:54,213 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:35:54,213 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:35:54,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:35:54,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 176 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2021-12-06 20:35:54,723 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:35:54,723 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417685599]
[2021-12-06 20:35:54,723 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417685599] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:35:54,723 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:35:54,724 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:35:54,724 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751295923]
[2021-12-06 20:35:54,724 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:35:54,725 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:35:54,725 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:35:54,726 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:35:54,726 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:54,726 INFO  L87              Difference]: Start difference. First operand 31223 states and 36437 transitions. Second operand  has 3 states, 3 states have (on average 602.0) internal successors, (1806), 3 states have internal predecessors, (1806), 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 20:35:58,758 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:35:58,758 INFO  L93              Difference]: Finished difference Result 82843 states and 98032 transitions.
[2021-12-06 20:35:58,758 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:35:58,758 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 602.0) internal successors, (1806), 3 states have internal predecessors, (1806), 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 1822
[2021-12-06 20:35:58,758 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:35:58,810 INFO  L225             Difference]: With dead ends: 82843
[2021-12-06 20:35:58,810 INFO  L226             Difference]: Without dead ends: 51622
[2021-12-06 20:35:58,830 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:58,831 INFO  L933         BasicCegarLoop]: 1846 mSDtfsCounter, 1885 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 5632 mSolverCounterSat, 1400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1885 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 7032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1400 IncrementalHoareTripleChecker+Valid, 5632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2021-12-06 20:35:58,831 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1885 Valid, 2141 Invalid, 7032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1400 Valid, 5632 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2021-12-06 20:35:58,869 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51622 states.
[2021-12-06 20:35:59,227 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51622 to 51613.
[2021-12-06 20:35:59,258 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51613 states, 51612 states have (on average 1.1357048748353096) internal successors, (58616), 51612 states have internal predecessors, (58616), 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 20:35:59,319 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51613 states to 51613 states and 58616 transitions.
[2021-12-06 20:35:59,319 INFO  L78                 Accepts]: Start accepts. Automaton has 51613 states and 58616 transitions. Word has length 1822
[2021-12-06 20:35:59,320 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:35:59,320 INFO  L470      AbstractCegarLoop]: Abstraction has 51613 states and 58616 transitions.
[2021-12-06 20:35:59,320 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 602.0) internal successors, (1806), 3 states have internal predecessors, (1806), 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 20:35:59,320 INFO  L276                IsEmpty]: Start isEmpty. Operand 51613 states and 58616 transitions.
[2021-12-06 20:35:59,370 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1857
[2021-12-06 20:35:59,370 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:35:59,371 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:35:59,372 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2021-12-06 20:35:59,372 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:35:59,372 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:35:59,372 INFO  L85        PathProgramCache]: Analyzing trace with hash 1465284963, now seen corresponding path program 1 times
[2021-12-06 20:35:59,373 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:35:59,373 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298349699]
[2021-12-06 20:35:59,373 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:35:59,373 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:35:59,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:35:59,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 268 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked.
[2021-12-06 20:35:59,936 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:35:59,936 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298349699]
[2021-12-06 20:35:59,936 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298349699] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:35:59,936 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:35:59,936 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:35:59,937 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389488321]
[2021-12-06 20:35:59,937 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:35:59,938 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:35:59,938 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:35:59,938 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:35:59,938 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:35:59,939 INFO  L87              Difference]: Start difference. First operand 51613 states and 58616 transitions. Second operand  has 3 states, 3 states have (on average 610.0) internal successors, (1830), 3 states have internal predecessors, (1830), 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 20:36:04,646 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:04,646 INFO  L93              Difference]: Finished difference Result 125383 states and 144048 transitions.
[2021-12-06 20:36:04,646 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:04,647 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 610.0) internal successors, (1830), 3 states have internal predecessors, (1830), 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 1856
[2021-12-06 20:36:04,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:04,711 INFO  L225             Difference]: With dead ends: 125383
[2021-12-06 20:36:04,711 INFO  L226             Difference]: Without dead ends: 73772
[2021-12-06 20:36:04,726 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:04,727 INFO  L933         BasicCegarLoop]: 3931 mSDtfsCounter, 1800 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 6302 mSolverCounterSat, 1109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 4165 SdHoareTripleChecker+Invalid, 7411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1109 IncrementalHoareTripleChecker+Valid, 6302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:04,727 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1800 Valid, 4165 Invalid, 7411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1109 Valid, 6302 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time]
[2021-12-06 20:36:04,768 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73772 states.
[2021-12-06 20:36:05,199 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73772 to 71997.
[2021-12-06 20:36:05,239 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 71997 states, 71996 states have (on average 1.1252708483804656) internal successors, (81015), 71996 states have internal predecessors, (81015), 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 20:36:05,322 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71997 states to 71997 states and 81015 transitions.
[2021-12-06 20:36:05,322 INFO  L78                 Accepts]: Start accepts. Automaton has 71997 states and 81015 transitions. Word has length 1856
[2021-12-06 20:36:05,323 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:05,323 INFO  L470      AbstractCegarLoop]: Abstraction has 71997 states and 81015 transitions.
[2021-12-06 20:36:05,323 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 610.0) internal successors, (1830), 3 states have internal predecessors, (1830), 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 20:36:05,323 INFO  L276                IsEmpty]: Start isEmpty. Operand 71997 states and 81015 transitions.
[2021-12-06 20:36:05,390 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1872
[2021-12-06 20:36:05,391 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:05,392 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2021-12-06 20:36:05,392 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2021-12-06 20:36:05,392 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:05,392 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:05,393 INFO  L85        PathProgramCache]: Analyzing trace with hash 568853336, now seen corresponding path program 1 times
[2021-12-06 20:36:05,393 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:05,393 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609337577]
[2021-12-06 20:36:05,393 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:05,393 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:05,520 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:06,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 316 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked.
[2021-12-06 20:36:06,002 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:06,003 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609337577]
[2021-12-06 20:36:06,003 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609337577] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:06,003 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:06,003 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:36:06,003 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836013117]
[2021-12-06 20:36:06,003 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:06,005 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:36:06,005 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:06,005 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:36:06,005 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:06,005 INFO  L87              Difference]: Start difference. First operand 71997 states and 81015 transitions. Second operand  has 3 states, 3 states have (on average 600.6666666666666) internal successors, (1802), 3 states have internal predecessors, (1802), 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 20:36:09,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:09,651 INFO  L93              Difference]: Finished difference Result 142197 states and 160187 transitions.
[2021-12-06 20:36:09,651 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:09,652 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 600.6666666666666) internal successors, (1802), 3 states have internal predecessors, (1802), 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 1871
[2021-12-06 20:36:09,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:09,722 INFO  L225             Difference]: With dead ends: 142197
[2021-12-06 20:36:09,722 INFO  L226             Difference]: Without dead ends: 71900
[2021-12-06 20:36:09,748 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:09,748 INFO  L933         BasicCegarLoop]: 1505 mSDtfsCounter, 2689 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2689 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 6172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1700 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:09,749 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2689 Valid, 1642 Invalid, 6172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1700 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2021-12-06 20:36:09,798 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71900 states.
[2021-12-06 20:36:10,257 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71900 to 68500.
[2021-12-06 20:36:10,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 68500 states, 68499 states have (on average 1.0831982948656185) internal successors, (74198), 68499 states have internal predecessors, (74198), 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 20:36:10,366 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68500 states to 68500 states and 74198 transitions.
[2021-12-06 20:36:10,366 INFO  L78                 Accepts]: Start accepts. Automaton has 68500 states and 74198 transitions. Word has length 1871
[2021-12-06 20:36:10,367 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:10,367 INFO  L470      AbstractCegarLoop]: Abstraction has 68500 states and 74198 transitions.
[2021-12-06 20:36:10,367 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 600.6666666666666) internal successors, (1802), 3 states have internal predecessors, (1802), 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 20:36:10,367 INFO  L276                IsEmpty]: Start isEmpty. Operand 68500 states and 74198 transitions.
[2021-12-06 20:36:10,432 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1888
[2021-12-06 20:36:10,432 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:10,433 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2021-12-06 20:36:10,433 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2021-12-06 20:36:10,434 INFO  L402      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:10,434 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:10,435 INFO  L85        PathProgramCache]: Analyzing trace with hash 1783086857, now seen corresponding path program 1 times
[2021-12-06 20:36:10,435 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:10,435 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934049585]
[2021-12-06 20:36:10,435 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:10,436 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:10,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:11,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 385 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked.
[2021-12-06 20:36:11,061 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:11,061 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934049585]
[2021-12-06 20:36:11,061 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934049585] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:11,061 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:11,062 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:36:11,062 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804147869]
[2021-12-06 20:36:11,062 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:11,064 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:36:11,064 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:11,065 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:36:11,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:11,065 INFO  L87              Difference]: Start difference. First operand 68500 states and 74198 transitions. Second operand  has 3 states, 3 states have (on average 606.6666666666666) internal successors, (1820), 3 states have internal predecessors, (1820), 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 20:36:14,672 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:14,672 INFO  L93              Difference]: Finished difference Result 143811 states and 155466 transitions.
[2021-12-06 20:36:14,672 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:14,673 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 606.6666666666666) internal successors, (1820), 3 states have internal predecessors, (1820), 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 1887
[2021-12-06 20:36:14,673 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:14,737 INFO  L225             Difference]: With dead ends: 143811
[2021-12-06 20:36:14,737 INFO  L226             Difference]: Without dead ends: 77011
[2021-12-06 20:36:14,761 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:14,762 INFO  L933         BasicCegarLoop]: 3876 mSDtfsCounter, 1707 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 5703 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 4101 SdHoareTripleChecker+Invalid, 5786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 5703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:14,762 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 4101 Invalid, 5786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 5703 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2021-12-06 20:36:14,814 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77011 states.
[2021-12-06 20:36:15,304 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77011 to 73596.
[2021-12-06 20:36:15,334 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 73596 states, 73595 states have (on average 1.0799782593926217) internal successors, (79481), 73595 states have internal predecessors, (79481), 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 20:36:15,413 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73596 states to 73596 states and 79481 transitions.
[2021-12-06 20:36:15,413 INFO  L78                 Accepts]: Start accepts. Automaton has 73596 states and 79481 transitions. Word has length 1887
[2021-12-06 20:36:15,414 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:15,414 INFO  L470      AbstractCegarLoop]: Abstraction has 73596 states and 79481 transitions.
[2021-12-06 20:36:15,414 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 606.6666666666666) internal successors, (1820), 3 states have internal predecessors, (1820), 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 20:36:15,414 INFO  L276                IsEmpty]: Start isEmpty. Operand 73596 states and 79481 transitions.
[2021-12-06 20:36:15,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1910
[2021-12-06 20:36:15,480 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:15,482 INFO  L514         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2021-12-06 20:36:15,482 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2021-12-06 20:36:15,482 INFO  L402      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:15,482 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:15,483 INFO  L85        PathProgramCache]: Analyzing trace with hash -985330832, now seen corresponding path program 1 times
[2021-12-06 20:36:15,483 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:15,483 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774346236]
[2021-12-06 20:36:15,483 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:15,483 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:15,612 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:16,193 INFO  L134       CoverageAnalysis]: Checked inductivity of 242 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 20:36:16,193 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:16,193 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774346236]
[2021-12-06 20:36:16,193 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774346236] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:16,194 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:16,194 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-12-06 20:36:16,194 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066288110]
[2021-12-06 20:36:16,194 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:16,196 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-12-06 20:36:16,196 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:16,197 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-12-06 20:36:16,197 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-12-06 20:36:16,197 INFO  L87              Difference]: Start difference. First operand 73596 states and 79481 transitions. Second operand  has 5 states, 5 states have (on average 381.8) internal successors, (1909), 5 states have internal predecessors, (1909), 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 20:36:21,242 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:21,242 INFO  L93              Difference]: Finished difference Result 162687 states and 175374 transitions.
[2021-12-06 20:36:21,242 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-12-06 20:36:21,242 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 381.8) internal successors, (1909), 5 states have internal predecessors, (1909), 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 1909
[2021-12-06 20:36:21,242 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:21,313 INFO  L225             Difference]: With dead ends: 162687
[2021-12-06 20:36:21,313 INFO  L226             Difference]: Without dead ends: 85693
[2021-12-06 20:36:21,333 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30
[2021-12-06 20:36:21,334 INFO  L933         BasicCegarLoop]: 3933 mSDtfsCounter, 5024 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 8417 mSolverCounterSat, 2269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5024 SdHoareTripleChecker+Valid, 4410 SdHoareTripleChecker+Invalid, 10686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2269 IncrementalHoareTripleChecker+Valid, 8417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:21,334 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [5024 Valid, 4410 Invalid, 10686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2269 Valid, 8417 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time]
[2021-12-06 20:36:21,394 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85693 states.
[2021-12-06 20:36:21,975 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85693 to 85478.
[2021-12-06 20:36:22,020 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 85478 states, 85477 states have (on average 1.0705335938322589) internal successors, (91506), 85477 states have internal predecessors, (91506), 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 20:36:22,107 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 85478 states to 85478 states and 91506 transitions.
[2021-12-06 20:36:22,108 INFO  L78                 Accepts]: Start accepts. Automaton has 85478 states and 91506 transitions. Word has length 1909
[2021-12-06 20:36:22,108 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:22,108 INFO  L470      AbstractCegarLoop]: Abstraction has 85478 states and 91506 transitions.
[2021-12-06 20:36:22,108 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 381.8) internal successors, (1909), 5 states have internal predecessors, (1909), 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 20:36:22,109 INFO  L276                IsEmpty]: Start isEmpty. Operand 85478 states and 91506 transitions.
[2021-12-06 20:36:22,173 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1944
[2021-12-06 20:36:22,173 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:22,174 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:36:22,174 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2021-12-06 20:36:22,174 INFO  L402      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:22,174 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:22,175 INFO  L85        PathProgramCache]: Analyzing trace with hash 1875113125, now seen corresponding path program 1 times
[2021-12-06 20:36:22,175 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:22,175 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987535420]
[2021-12-06 20:36:22,175 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:22,175 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:22,306 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:22,837 INFO  L134       CoverageAnalysis]: Checked inductivity of 535 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked.
[2021-12-06 20:36:22,837 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:22,837 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987535420]
[2021-12-06 20:36:22,837 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987535420] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:22,837 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:22,838 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:36:22,838 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323413599]
[2021-12-06 20:36:22,838 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:22,839 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:36:22,839 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:22,840 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:36:22,840 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:22,840 INFO  L87              Difference]: Start difference. First operand 85478 states and 91506 transitions. Second operand  has 3 states, 3 states have (on average 622.6666666666666) internal successors, (1868), 3 states have internal predecessors, (1868), 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 20:36:27,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:27,040 INFO  L93              Difference]: Finished difference Result 188015 states and 202956 transitions.
[2021-12-06 20:36:27,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:27,041 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 622.6666666666666) internal successors, (1868), 3 states have internal predecessors, (1868), 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 1943
[2021-12-06 20:36:27,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:27,137 INFO  L225             Difference]: With dead ends: 188015
[2021-12-06 20:36:27,137 INFO  L226             Difference]: Without dead ends: 104237
[2021-12-06 20:36:27,164 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:27,165 INFO  L933         BasicCegarLoop]: 3733 mSDtfsCounter, 1806 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 6111 mSolverCounterSat, 1175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 3954 SdHoareTripleChecker+Invalid, 7286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1175 IncrementalHoareTripleChecker+Valid, 6111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:27,165 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1806 Valid, 3954 Invalid, 7286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1175 Valid, 6111 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2021-12-06 20:36:27,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104237 states.
[2021-12-06 20:36:28,032 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104237 to 104167.
[2021-12-06 20:36:28,094 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 104167 states, 104166 states have (on average 1.0690628420021888) internal successors, (111360), 104166 states have internal predecessors, (111360), 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 20:36:28,241 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 104167 states to 104167 states and 111360 transitions.
[2021-12-06 20:36:28,241 INFO  L78                 Accepts]: Start accepts. Automaton has 104167 states and 111360 transitions. Word has length 1943
[2021-12-06 20:36:28,242 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:28,242 INFO  L470      AbstractCegarLoop]: Abstraction has 104167 states and 111360 transitions.
[2021-12-06 20:36:28,242 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 622.6666666666666) internal successors, (1868), 3 states have internal predecessors, (1868), 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 20:36:28,243 INFO  L276                IsEmpty]: Start isEmpty. Operand 104167 states and 111360 transitions.
[2021-12-06 20:36:28,355 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1986
[2021-12-06 20:36:28,355 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:28,357 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:36:28,357 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2021-12-06 20:36:28,357 INFO  L402      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:28,357 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:28,358 INFO  L85        PathProgramCache]: Analyzing trace with hash -1870832205, now seen corresponding path program 1 times
[2021-12-06 20:36:28,358 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:28,358 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524413705]
[2021-12-06 20:36:28,358 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:28,358 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:28,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:29,093 INFO  L134       CoverageAnalysis]: Checked inductivity of 512 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked.
[2021-12-06 20:36:29,093 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:29,093 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524413705]
[2021-12-06 20:36:29,093 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524413705] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:29,094 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:29,094 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:36:29,094 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993857705]
[2021-12-06 20:36:29,094 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:29,095 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:36:29,096 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:29,096 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:36:29,096 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:29,096 INFO  L87              Difference]: Start difference. First operand 104167 states and 111360 transitions. Second operand  has 3 states, 3 states have (on average 647.0) internal successors, (1941), 3 states have internal predecessors, (1941), 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 20:36:33,556 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:33,556 INFO  L93              Difference]: Finished difference Result 252494 states and 271598 transitions.
[2021-12-06 20:36:33,556 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:33,556 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 647.0) internal successors, (1941), 3 states have internal predecessors, (1941), 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 1985
[2021-12-06 20:36:33,557 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:33,694 INFO  L225             Difference]: With dead ends: 252494
[2021-12-06 20:36:33,694 INFO  L226             Difference]: Without dead ends: 150027
[2021-12-06 20:36:33,734 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:33,735 INFO  L933         BasicCegarLoop]: 937 mSDtfsCounter, 2133 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 5087 mSolverCounterSat, 2618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2133 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 7705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2618 IncrementalHoareTripleChecker+Valid, 5087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:33,735 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2133 Valid, 1032 Invalid, 7705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2618 Valid, 5087 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time]
[2021-12-06 20:36:33,894 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 150027 states.
[2021-12-06 20:36:35,146 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 150027 to 143215.
[2021-12-06 20:36:35,194 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 143215 states, 143214 states have (on average 1.0766405519013504) internal successors, (154190), 143214 states have internal predecessors, (154190), 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 20:36:35,347 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 143215 states to 143215 states and 154190 transitions.
[2021-12-06 20:36:35,347 INFO  L78                 Accepts]: Start accepts. Automaton has 143215 states and 154190 transitions. Word has length 1985
[2021-12-06 20:36:35,348 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:35,348 INFO  L470      AbstractCegarLoop]: Abstraction has 143215 states and 154190 transitions.
[2021-12-06 20:36:35,348 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 647.0) internal successors, (1941), 3 states have internal predecessors, (1941), 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 20:36:35,348 INFO  L276                IsEmpty]: Start isEmpty. Operand 143215 states and 154190 transitions.
[2021-12-06 20:36:35,552 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2202
[2021-12-06 20:36:35,552 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:35,553 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:36:35,553 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2021-12-06 20:36:35,553 INFO  L402      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:35,554 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:35,554 INFO  L85        PathProgramCache]: Analyzing trace with hash -1499375737, now seen corresponding path program 1 times
[2021-12-06 20:36:35,554 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:35,554 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071882604]
[2021-12-06 20:36:35,554 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:35,555 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:35,710 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:36,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 1149 backedges. 887 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked.
[2021-12-06 20:36:36,337 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:36,337 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071882604]
[2021-12-06 20:36:36,337 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071882604] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:36,337 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:36,337 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:36:36,338 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105018405]
[2021-12-06 20:36:36,338 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:36,339 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:36:36,339 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:36,340 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:36:36,340 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:36,340 INFO  L87              Difference]: Start difference. First operand 143215 states and 154190 transitions. Second operand  has 3 states, 3 states have (on average 665.6666666666666) internal successors, (1997), 3 states have internal predecessors, (1997), 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 20:36:41,124 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:41,124 INFO  L93              Difference]: Finished difference Result 350969 states and 378057 transitions.
[2021-12-06 20:36:41,124 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:41,124 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 665.6666666666666) internal successors, (1997), 3 states have internal predecessors, (1997), 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 2201
[2021-12-06 20:36:41,125 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:41,332 INFO  L225             Difference]: With dead ends: 350969
[2021-12-06 20:36:41,332 INFO  L226             Difference]: Without dead ends: 207753
[2021-12-06 20:36:41,370 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:41,371 INFO  L933         BasicCegarLoop]: 2057 mSDtfsCounter, 1635 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 5606 mSolverCounterSat, 1281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1281 IncrementalHoareTripleChecker+Valid, 5606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:41,371 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1635 Valid, 2301 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1281 Valid, 5606 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time]
[2021-12-06 20:36:41,520 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 207753 states.
[2021-12-06 20:36:43,091 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 207753 to 202646.
[2021-12-06 20:36:43,190 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 202646 states, 202645 states have (on average 1.0608946680154951) internal successors, (214985), 202645 states have internal predecessors, (214985), 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 20:36:43,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 202646 states to 202646 states and 214985 transitions.
[2021-12-06 20:36:43,440 INFO  L78                 Accepts]: Start accepts. Automaton has 202646 states and 214985 transitions. Word has length 2201
[2021-12-06 20:36:43,440 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:43,440 INFO  L470      AbstractCegarLoop]: Abstraction has 202646 states and 214985 transitions.
[2021-12-06 20:36:43,441 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 665.6666666666666) internal successors, (1997), 3 states have internal predecessors, (1997), 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 20:36:43,441 INFO  L276                IsEmpty]: Start isEmpty. Operand 202646 states and 214985 transitions.
[2021-12-06 20:36:43,586 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2308
[2021-12-06 20:36:43,586 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:43,587 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2021-12-06 20:36:43,587 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2021-12-06 20:36:43,588 INFO  L402      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:43,588 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:43,588 INFO  L85        PathProgramCache]: Analyzing trace with hash -1029664815, now seen corresponding path program 1 times
[2021-12-06 20:36:43,588 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:43,589 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438246401]
[2021-12-06 20:36:43,589 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:43,589 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:43,750 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:44,550 INFO  L134       CoverageAnalysis]: Checked inductivity of 1352 backedges. 959 proven. 0 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked.
[2021-12-06 20:36:44,550 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:44,550 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438246401]
[2021-12-06 20:36:44,550 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438246401] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:44,550 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:44,551 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:36:44,551 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746846012]
[2021-12-06 20:36:44,551 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:44,552 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:36:44,552 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:44,553 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:36:44,553 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:44,553 INFO  L87              Difference]: Start difference. First operand 202646 states and 214985 transitions. Second operand  has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 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 20:36:49,506 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:49,506 INFO  L93              Difference]: Finished difference Result 459626 states and 488823 transitions.
[2021-12-06 20:36:49,507 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:49,507 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 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 2307
[2021-12-06 20:36:49,507 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:49,795 INFO  L225             Difference]: With dead ends: 459626
[2021-12-06 20:36:49,796 INFO  L226             Difference]: Without dead ends: 255281
[2021-12-06 20:36:49,871 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:49,871 INFO  L933         BasicCegarLoop]: 3801 mSDtfsCounter, 1750 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 5695 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 4046 SdHoareTripleChecker+Invalid, 6945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 5695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:49,872 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 4046 Invalid, 6945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 5695 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2021-12-06 20:36:50,065 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 255281 states.
[2021-12-06 20:36:51,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 255281 to 250175.
[2021-12-06 20:36:52,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 250175 states, 250174 states have (on average 1.0531190291557075) internal successors, (263463), 250174 states have internal predecessors, (263463), 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 20:36:52,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 250175 states to 250175 states and 263463 transitions.
[2021-12-06 20:36:52,317 INFO  L78                 Accepts]: Start accepts. Automaton has 250175 states and 263463 transitions. Word has length 2307
[2021-12-06 20:36:52,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:36:52,318 INFO  L470      AbstractCegarLoop]: Abstraction has 250175 states and 263463 transitions.
[2021-12-06 20:36:52,318 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 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 20:36:52,318 INFO  L276                IsEmpty]: Start isEmpty. Operand 250175 states and 263463 transitions.
[2021-12-06 20:36:52,661 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2315
[2021-12-06 20:36:52,661 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:36:52,662 INFO  L514         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-12-06 20:36:52,662 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2021-12-06 20:36:52,662 INFO  L402      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:36:52,663 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:36:52,663 INFO  L85        PathProgramCache]: Analyzing trace with hash -1051721697, now seen corresponding path program 1 times
[2021-12-06 20:36:52,663 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:36:52,663 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153006616]
[2021-12-06 20:36:52,664 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:36:52,664 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:36:52,830 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:36:53,442 INFO  L134       CoverageAnalysis]: Checked inductivity of 1344 backedges. 999 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked.
[2021-12-06 20:36:53,442 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:36:53,442 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153006616]
[2021-12-06 20:36:53,443 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153006616] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:36:53,443 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:36:53,443 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:36:53,443 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376980847]
[2021-12-06 20:36:53,443 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:36:53,445 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:36:53,445 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:36:53,445 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:36:53,445 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:53,445 INFO  L87              Difference]: Start difference. First operand 250175 states and 263463 transitions. Second operand  has 3 states, 3 states have (on average 675.6666666666666) internal successors, (2027), 3 states have internal predecessors, (2027), 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 20:36:58,247 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:36:58,247 INFO  L93              Difference]: Finished difference Result 513934 states and 540653 transitions.
[2021-12-06 20:36:58,248 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:36:58,248 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 675.6666666666666) internal successors, (2027), 3 states have internal predecessors, (2027), 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 2314
[2021-12-06 20:36:58,249 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:36:58,530 INFO  L225             Difference]: With dead ends: 513934
[2021-12-06 20:36:58,530 INFO  L226             Difference]: Without dead ends: 251804
[2021-12-06 20:36:58,627 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:36:58,628 INFO  L933         BasicCegarLoop]: 2820 mSDtfsCounter, 2285 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 1527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2285 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 6354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1527 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time
[2021-12-06 20:36:58,628 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2285 Valid, 2918 Invalid, 6354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1527 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time]
[2021-12-06 20:36:58,905 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 251804 states.
[2021-12-06 20:37:00,664 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 251804 to 246705.
[2021-12-06 20:37:00,765 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 246705 states, 246704 states have (on average 1.0386941435890784) internal successors, (256250), 246704 states have internal predecessors, (256250), 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 20:37:01,037 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 246705 states to 246705 states and 256250 transitions.
[2021-12-06 20:37:01,037 INFO  L78                 Accepts]: Start accepts. Automaton has 246705 states and 256250 transitions. Word has length 2314
[2021-12-06 20:37:01,037 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:37:01,038 INFO  L470      AbstractCegarLoop]: Abstraction has 246705 states and 256250 transitions.
[2021-12-06 20:37:01,038 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 675.6666666666666) internal successors, (2027), 3 states have internal predecessors, (2027), 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 20:37:01,038 INFO  L276                IsEmpty]: Start isEmpty. Operand 246705 states and 256250 transitions.
[2021-12-06 20:37:01,326 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2329
[2021-12-06 20:37:01,326 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:37:01,328 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:37:01,328 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2021-12-06 20:37:01,328 INFO  L402      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:37:01,328 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:37:01,329 INFO  L85        PathProgramCache]: Analyzing trace with hash 1629523486, now seen corresponding path program 1 times
[2021-12-06 20:37:01,329 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:37:01,329 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846668843]
[2021-12-06 20:37:01,329 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:37:01,329 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:37:01,511 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:37:02,144 INFO  L134       CoverageAnalysis]: Checked inductivity of 864 backedges. 810 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked.
[2021-12-06 20:37:02,144 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:37:02,144 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846668843]
[2021-12-06 20:37:02,144 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846668843] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:37:02,144 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:37:02,145 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:37:02,145 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315846256]
[2021-12-06 20:37:02,145 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:37:02,146 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:37:02,146 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:37:02,147 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:37:02,147 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:02,147 INFO  L87              Difference]: Start difference. First operand 246705 states and 256250 transitions. Second operand  has 3 states, 3 states have (on average 762.3333333333334) internal successors, (2287), 3 states have internal predecessors, (2287), 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 20:37:07,308 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:37:07,308 INFO  L93              Difference]: Finished difference Result 542705 states and 565811 transitions.
[2021-12-06 20:37:07,308 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:37:07,308 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 762.3333333333334) internal successors, (2287), 3 states have internal predecessors, (2287), 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 2328
[2021-12-06 20:37:07,309 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:37:07,622 INFO  L225             Difference]: With dead ends: 542705
[2021-12-06 20:37:07,622 INFO  L226             Difference]: Without dead ends: 295981
[2021-12-06 20:37:07,817 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:07,817 INFO  L933         BasicCegarLoop]: 3528 mSDtfsCounter, 1729 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5799 mSolverCounterSat, 1135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 6934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 5799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time
[2021-12-06 20:37:07,818 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 3705 Invalid, 6934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1135 Valid, 5799 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time]
[2021-12-06 20:37:07,995 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 295981 states.
[2021-12-06 20:37:10,135 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 295981 to 294228.
[2021-12-06 20:37:10,256 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 294228 states, 294227 states have (on average 1.036849099504804) internal successors, (305069), 294227 states have internal predecessors, (305069), 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 20:37:10,762 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 294228 states to 294228 states and 305069 transitions.
[2021-12-06 20:37:10,762 INFO  L78                 Accepts]: Start accepts. Automaton has 294228 states and 305069 transitions. Word has length 2328
[2021-12-06 20:37:10,763 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:37:10,763 INFO  L470      AbstractCegarLoop]: Abstraction has 294228 states and 305069 transitions.
[2021-12-06 20:37:10,763 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 762.3333333333334) internal successors, (2287), 3 states have internal predecessors, (2287), 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 20:37:10,763 INFO  L276                IsEmpty]: Start isEmpty. Operand 294228 states and 305069 transitions.
[2021-12-06 20:37:11,043 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2426
[2021-12-06 20:37:11,044 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:37:11,045 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:37:11,045 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2021-12-06 20:37:11,045 INFO  L402      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:37:11,046 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:37:11,046 INFO  L85        PathProgramCache]: Analyzing trace with hash 712246703, now seen corresponding path program 1 times
[2021-12-06 20:37:11,046 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:37:11,046 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032051636]
[2021-12-06 20:37:11,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:37:11,047 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:37:11,249 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:37:12,069 INFO  L134       CoverageAnalysis]: Checked inductivity of 1376 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked.
[2021-12-06 20:37:12,069 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:37:12,069 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032051636]
[2021-12-06 20:37:12,069 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032051636] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:37:12,069 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:37:12,070 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:37:12,070 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668220804]
[2021-12-06 20:37:12,070 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:37:12,072 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:37:12,072 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:37:12,072 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:37:12,072 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:12,072 INFO  L87              Difference]: Start difference. First operand 294228 states and 305069 transitions. Second operand  has 3 states, 3 states have (on average 721.0) internal successors, (2163), 3 states have internal predecessors, (2163), 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 20:37:16,972 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:37:16,972 INFO  L93              Difference]: Finished difference Result 649599 states and 674690 transitions.
[2021-12-06 20:37:16,972 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:37:16,973 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 721.0) internal successors, (2163), 3 states have internal predecessors, (2163), 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 2425
[2021-12-06 20:37:16,973 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:37:17,322 INFO  L225             Difference]: With dead ends: 649599
[2021-12-06 20:37:17,322 INFO  L226             Difference]: Without dead ends: 357069
[2021-12-06 20:37:17,392 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:17,393 INFO  L933         BasicCegarLoop]: 3551 mSDtfsCounter, 1407 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 6483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 5420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time
[2021-12-06 20:37:17,393 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 3769 Invalid, 6483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 5420 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time]
[2021-12-06 20:37:17,671 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 357069 states.
[2021-12-06 20:37:20,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 357069 to 350259.
[2021-12-06 20:37:20,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 350259 states, 350258 states have (on average 1.0334296432915164) internal successors, (361967), 350258 states have internal predecessors, (361967), 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 20:37:21,101 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 350259 states to 350259 states and 361967 transitions.
[2021-12-06 20:37:21,101 INFO  L78                 Accepts]: Start accepts. Automaton has 350259 states and 361967 transitions. Word has length 2425
[2021-12-06 20:37:21,102 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:37:21,102 INFO  L470      AbstractCegarLoop]: Abstraction has 350259 states and 361967 transitions.
[2021-12-06 20:37:21,102 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 721.0) internal successors, (2163), 3 states have internal predecessors, (2163), 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 20:37:21,102 INFO  L276                IsEmpty]: Start isEmpty. Operand 350259 states and 361967 transitions.
[2021-12-06 20:37:21,477 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2455
[2021-12-06 20:37:21,477 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:37:21,478 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:37:21,478 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2021-12-06 20:37:21,478 INFO  L402      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:37:21,479 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:37:21,479 INFO  L85        PathProgramCache]: Analyzing trace with hash 479764486, now seen corresponding path program 1 times
[2021-12-06 20:37:21,479 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:37:21,479 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848176054]
[2021-12-06 20:37:21,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:37:21,480 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:37:21,670 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:37:22,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 1284 backedges. 1057 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked.
[2021-12-06 20:37:22,447 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:37:22,447 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848176054]
[2021-12-06 20:37:22,447 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848176054] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:37:22,447 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:37:22,448 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:37:22,448 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284966424]
[2021-12-06 20:37:22,448 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:37:22,449 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:37:22,450 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:37:22,450 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:37:22,450 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:22,450 INFO  L87              Difference]: Start difference. First operand 350259 states and 361967 transitions. Second operand  has 3 states, 3 states have (on average 761.3333333333334) internal successors, (2284), 3 states have internal predecessors, (2284), 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 20:37:27,487 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:37:27,488 INFO  L93              Difference]: Finished difference Result 793908 states and 821860 transitions.
[2021-12-06 20:37:27,488 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:37:27,489 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 761.3333333333334) internal successors, (2284), 3 states have internal predecessors, (2284), 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 2454
[2021-12-06 20:37:27,489 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:37:27,996 INFO  L225             Difference]: With dead ends: 793908
[2021-12-06 20:37:27,996 INFO  L226             Difference]: Without dead ends: 445349
[2021-12-06 20:37:28,242 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:28,242 INFO  L933         BasicCegarLoop]: 3534 mSDtfsCounter, 1687 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 5561 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 3793 SdHoareTripleChecker+Invalid, 6429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 5561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time
[2021-12-06 20:37:28,243 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1687 Valid, 3793 Invalid, 6429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 5561 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time]
[2021-12-06 20:37:28,543 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 445349 states.
[2021-12-06 20:37:32,047 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 445349 to 441950.
[2021-12-06 20:37:32,244 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 441950 states, 441949 states have (on average 1.0288472199280914) internal successors, (454698), 441949 states have internal predecessors, (454698), 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 20:37:33,124 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 441950 states to 441950 states and 454698 transitions.
[2021-12-06 20:37:33,124 INFO  L78                 Accepts]: Start accepts. Automaton has 441950 states and 454698 transitions. Word has length 2454
[2021-12-06 20:37:33,125 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:37:33,125 INFO  L470      AbstractCegarLoop]: Abstraction has 441950 states and 454698 transitions.
[2021-12-06 20:37:33,125 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 761.3333333333334) internal successors, (2284), 3 states have internal predecessors, (2284), 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 20:37:33,126 INFO  L276                IsEmpty]: Start isEmpty. Operand 441950 states and 454698 transitions.
[2021-12-06 20:37:33,630 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2618
[2021-12-06 20:37:33,630 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:37:33,632 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:37:33,632 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2021-12-06 20:37:33,632 INFO  L402      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:37:33,632 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:37:33,633 INFO  L85        PathProgramCache]: Analyzing trace with hash 1421958849, now seen corresponding path program 1 times
[2021-12-06 20:37:33,633 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:37:33,633 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105001913]
[2021-12-06 20:37:33,633 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:37:33,633 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:37:33,871 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:37:34,778 INFO  L134       CoverageAnalysis]: Checked inductivity of 1660 backedges. 1166 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked.
[2021-12-06 20:37:34,778 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:37:34,778 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105001913]
[2021-12-06 20:37:34,778 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105001913] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:37:34,778 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:37:34,779 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:37:34,779 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042995857]
[2021-12-06 20:37:34,779 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:37:34,781 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-06 20:37:34,781 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:37:34,781 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-06 20:37:34,781 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 20:37:34,782 INFO  L87              Difference]: Start difference. First operand 441950 states and 454698 transitions. Second operand  has 4 states, 4 states have (on average 552.0) internal successors, (2208), 3 states have internal predecessors, (2208), 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 20:37:41,667 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:37:41,667 INFO  L93              Difference]: Finished difference Result 892414 states and 917960 transitions.
[2021-12-06 20:37:41,667 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-06 20:37:41,668 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 552.0) internal successors, (2208), 3 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2617
[2021-12-06 20:37:41,668 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:37:42,162 INFO  L225             Difference]: With dead ends: 892414
[2021-12-06 20:37:42,162 INFO  L226             Difference]: Without dead ends: 450462
[2021-12-06 20:37:42,289 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 20:37:42,289 INFO  L933         BasicCegarLoop]: 827 mSDtfsCounter, 4422 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 9210 mSolverCounterSat, 1694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4422 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 10904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1694 IncrementalHoareTripleChecker+Valid, 9210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time
[2021-12-06 20:37:42,290 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4422 Valid, 1065 Invalid, 10904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1694 Valid, 9210 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time]
[2021-12-06 20:37:42,745 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 450462 states.
[2021-12-06 20:37:46,264 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 450462 to 438550.
[2021-12-06 20:37:46,441 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 438550 states, 438549 states have (on average 1.01496069994459) internal successors, (445110), 438549 states have internal predecessors, (445110), 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 20:37:47,117 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 438550 states to 438550 states and 445110 transitions.
[2021-12-06 20:37:47,117 INFO  L78                 Accepts]: Start accepts. Automaton has 438550 states and 445110 transitions. Word has length 2617
[2021-12-06 20:37:47,117 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:37:47,118 INFO  L470      AbstractCegarLoop]: Abstraction has 438550 states and 445110 transitions.
[2021-12-06 20:37:47,118 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 552.0) internal successors, (2208), 3 states have internal predecessors, (2208), 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 20:37:47,118 INFO  L276                IsEmpty]: Start isEmpty. Operand 438550 states and 445110 transitions.
[2021-12-06 20:37:47,391 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 2620
[2021-12-06 20:37:47,391 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:37:47,393 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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[2021-12-06 20:37:47,393 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2021-12-06 20:37:47,393 INFO  L402      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:37:47,393 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:37:47,394 INFO  L85        PathProgramCache]: Analyzing trace with hash 1092834996, now seen corresponding path program 1 times
[2021-12-06 20:37:47,394 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:37:47,394 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550399994]
[2021-12-06 20:37:47,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:37:47,395 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:37:47,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:37:48,545 INFO  L134       CoverageAnalysis]: Checked inductivity of 1511 backedges. 1060 proven. 0 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked.
[2021-12-06 20:37:48,545 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:37:48,545 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550399994]
[2021-12-06 20:37:48,545 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550399994] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:37:48,545 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:37:48,545 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:37:48,546 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671809956]
[2021-12-06 20:37:48,546 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:37:48,547 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:37:48,547 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:37:48,548 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:37:48,548 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:48,548 INFO  L87              Difference]: Start difference. First operand 438550 states and 445110 transitions. Second operand  has 3 states, 3 states have (on average 744.0) internal successors, (2232), 3 states have internal predecessors, (2232), 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 20:37:53,434 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:37:53,434 INFO  L93              Difference]: Finished difference Result 995963 states and 1011315 transitions.
[2021-12-06 20:37:53,434 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:37:53,435 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 744.0) internal successors, (2232), 3 states have internal predecessors, (2232), 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 2619
[2021-12-06 20:37:53,435 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:37:54,059 INFO  L225             Difference]: With dead ends: 995963
[2021-12-06 20:37:54,059 INFO  L226             Difference]: Without dead ends: 559113
[2021-12-06 20:37:54,218 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:37:54,219 INFO  L933         BasicCegarLoop]: 2830 mSDtfsCounter, 1853 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 4341 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 4956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 4341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time
[2021-12-06 20:37:54,219 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 3013 Invalid, 4956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 4341 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time]
[2021-12-06 20:37:54,757 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 559113 states.
[2021-12-06 20:37:58,845 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 559113 to 543825.
[2021-12-06 20:37:59,052 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 543825 states, 543824 states have (on average 1.0131513136603019) internal successors, (550976), 543824 states have internal predecessors, (550976), 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 20:37:59,950 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 543825 states to 543825 states and 550976 transitions.
[2021-12-06 20:37:59,950 INFO  L78                 Accepts]: Start accepts. Automaton has 543825 states and 550976 transitions. Word has length 2619
[2021-12-06 20:37:59,951 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:37:59,951 INFO  L470      AbstractCegarLoop]: Abstraction has 543825 states and 550976 transitions.
[2021-12-06 20:37:59,952 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 744.0) internal successors, (2232), 3 states have internal predecessors, (2232), 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 20:37:59,952 INFO  L276                IsEmpty]: Start isEmpty. Operand 543825 states and 550976 transitions.
[2021-12-06 20:38:00,625 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3053
[2021-12-06 20:38:00,625 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:38:00,626 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:38:00,627 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2021-12-06 20:38:00,627 INFO  L402      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:38:00,627 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:38:00,628 INFO  L85        PathProgramCache]: Analyzing trace with hash 1219015937, now seen corresponding path program 1 times
[2021-12-06 20:38:00,628 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:38:00,628 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973384284]
[2021-12-06 20:38:00,628 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:38:00,628 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:38:00,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:38:02,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 2524 backedges. 2095 proven. 250 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked.
[2021-12-06 20:38:02,249 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:38:02,249 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973384284]
[2021-12-06 20:38:02,249 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973384284] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-06 20:38:02,249 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544809270]
[2021-12-06 20:38:02,250 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:38:02,250 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-06 20:38:02,250 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3
[2021-12-06 20:38:02,251 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-06 20:38:02,252 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-12-06 20:38:02,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:38:02,894 INFO  L263         TraceCheckSpWp]: Trace formula consists of 3361 conjuncts, 2 conjunts are in the unsatisfiable core
[2021-12-06 20:38:02,935 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-12-06 20:38:04,996 INFO  L134       CoverageAnalysis]: Checked inductivity of 2524 backedges. 2115 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked.
[2021-12-06 20:38:04,997 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-12-06 20:38:04,997 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [544809270] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:38:04,997 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-12-06 20:38:04,998 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11
[2021-12-06 20:38:04,998 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681237620]
[2021-12-06 20:38:04,998 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:38:05,001 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:38:05,001 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:38:05,001 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:38:05,001 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2021-12-06 20:38:05,002 INFO  L87              Difference]: Start difference. First operand 543825 states and 550976 transitions. Second operand  has 3 states, 3 states have (on average 893.6666666666666) internal successors, (2681), 3 states have internal predecessors, (2681), 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 20:38:10,005 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:38:10,005 INFO  L93              Difference]: Finished difference Result 1085950 states and 1100244 transitions.
[2021-12-06 20:38:10,005 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:38:10,006 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 893.6666666666666) internal successors, (2681), 3 states have internal predecessors, (2681), 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 3052
[2021-12-06 20:38:10,007 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:38:10,682 INFO  L225             Difference]: With dead ends: 1085950
[2021-12-06 20:38:10,682 INFO  L226             Difference]: Without dead ends: 543825
[2021-12-06 20:38:10,886 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3060 GetRequests, 3051 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2021-12-06 20:38:10,886 INFO  L933         BasicCegarLoop]: 651 mSDtfsCounter, 1627 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4218 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 4756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 4218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time
[2021-12-06 20:38:10,887 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 756 Invalid, 4756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 4218 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time]
[2021-12-06 20:38:11,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 543825 states.
[2021-12-06 20:38:15,550 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 543825 to 528540.
[2021-12-06 20:38:15,750 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 528540 states, 528539 states have (on average 1.0108771538145718) internal successors, (534288), 528539 states have internal predecessors, (534288), 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 20:38:16,541 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 528540 states to 528540 states and 534288 transitions.
[2021-12-06 20:38:16,541 INFO  L78                 Accepts]: Start accepts. Automaton has 528540 states and 534288 transitions. Word has length 3052
[2021-12-06 20:38:16,542 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:38:16,542 INFO  L470      AbstractCegarLoop]: Abstraction has 528540 states and 534288 transitions.
[2021-12-06 20:38:16,543 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 893.6666666666666) internal successors, (2681), 3 states have internal predecessors, (2681), 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 20:38:16,543 INFO  L276                IsEmpty]: Start isEmpty. Operand 528540 states and 534288 transitions.
[2021-12-06 20:38:17,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3484
[2021-12-06 20:38:17,021 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:38:17,022 INFO  L514         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:38:17,045 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-12-06 20:38:17,223 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-06 20:38:17,225 INFO  L402      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:38:17,226 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:38:17,229 INFO  L85        PathProgramCache]: Analyzing trace with hash 898503205, now seen corresponding path program 1 times
[2021-12-06 20:38:17,229 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:38:17,229 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001423896]
[2021-12-06 20:38:17,230 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:38:17,231 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:38:17,785 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:38:19,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 4150 backedges. 3037 proven. 0 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked.
[2021-12-06 20:38:19,335 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:38:19,335 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001423896]
[2021-12-06 20:38:19,336 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001423896] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:38:19,336 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:38:19,336 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:38:19,336 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603958432]
[2021-12-06 20:38:19,336 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:38:19,339 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-06 20:38:19,339 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:38:19,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-06 20:38:19,339 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 20:38:19,339 INFO  L87              Difference]: Start difference. First operand 528540 states and 534288 transitions. Second operand  has 4 states, 4 states have (on average 684.0) internal successors, (2736), 3 states have internal predecessors, (2736), 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 20:38:25,967 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:38:25,967 INFO  L93              Difference]: Finished difference Result 1068965 states and 1080547 transitions.
[2021-12-06 20:38:25,968 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-06 20:38:25,968 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 684.0) internal successors, (2736), 3 states have internal predecessors, (2736), 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 3483
[2021-12-06 20:38:25,969 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:38:26,715 INFO  L225             Difference]: With dead ends: 1068965
[2021-12-06 20:38:26,715 INFO  L226             Difference]: Without dead ends: 540411
[2021-12-06 20:38:26,839 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-06 20:38:26,839 INFO  L933         BasicCegarLoop]: 774 mSDtfsCounter, 3304 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 8127 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3304 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 8889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 8127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2021-12-06 20:38:26,840 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3304 Valid, 985 Invalid, 8889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 8127 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2021-12-06 20:38:27,189 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 540411 states.
[2021-12-06 20:38:31,280 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 540411 to 530222.
[2021-12-06 20:38:31,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 530222 states, 530221 states have (on average 1.0105918098302407) internal successors, (535837), 530221 states have internal predecessors, (535837), 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 20:38:32,350 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 530222 states to 530222 states and 535837 transitions.
[2021-12-06 20:38:32,350 INFO  L78                 Accepts]: Start accepts. Automaton has 530222 states and 535837 transitions. Word has length 3483
[2021-12-06 20:38:32,351 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:38:32,352 INFO  L470      AbstractCegarLoop]: Abstraction has 530222 states and 535837 transitions.
[2021-12-06 20:38:32,352 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 684.0) internal successors, (2736), 3 states have internal predecessors, (2736), 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 20:38:32,352 INFO  L276                IsEmpty]: Start isEmpty. Operand 530222 states and 535837 transitions.
[2021-12-06 20:38:33,046 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3561
[2021-12-06 20:38:33,047 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:38:33,048 INFO  L514         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:38:33,049 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21
[2021-12-06 20:38:33,049 INFO  L402      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:38:33,049 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:38:33,050 INFO  L85        PathProgramCache]: Analyzing trace with hash -222433543, now seen corresponding path program 1 times
[2021-12-06 20:38:33,050 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:38:33,050 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895144424]
[2021-12-06 20:38:33,050 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:38:33,050 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:38:33,305 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:38:34,939 INFO  L134       CoverageAnalysis]: Checked inductivity of 3484 backedges. 2040 proven. 422 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked.
[2021-12-06 20:38:34,939 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:38:34,939 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895144424]
[2021-12-06 20:38:34,939 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895144424] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-06 20:38:34,939 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486907578]
[2021-12-06 20:38:34,940 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:38:34,940 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-06 20:38:34,940 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3
[2021-12-06 20:38:34,941 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-12-06 20:38:34,941 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-12-06 20:38:35,616 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:38:35,626 INFO  L263         TraceCheckSpWp]: Trace formula consists of 3881 conjuncts, 2 conjunts are in the unsatisfiable core
[2021-12-06 20:38:35,656 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-12-06 20:38:38,386 INFO  L134       CoverageAnalysis]: Checked inductivity of 3484 backedges. 2735 proven. 0 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked.
[2021-12-06 20:38:38,386 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-12-06 20:38:38,386 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [486907578] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:38:38,386 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2021-12-06 20:38:38,387 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8
[2021-12-06 20:38:38,388 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141415155]
[2021-12-06 20:38:38,388 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:38:38,390 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:38:38,390 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:38:38,390 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:38:38,390 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2021-12-06 20:38:38,391 INFO  L87              Difference]: Start difference. First operand 530222 states and 535837 transitions. Second operand  has 3 states, 3 states have (on average 1025.0) internal successors, (3075), 3 states have internal predecessors, (3075), 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 20:38:43,324 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:38:43,325 INFO  L93              Difference]: Finished difference Result 1058741 states and 1069954 transitions.
[2021-12-06 20:38:43,325 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:38:43,325 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 1025.0) internal successors, (3075), 3 states have internal predecessors, (3075), 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 3560
[2021-12-06 20:38:43,327 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:38:44,167 INFO  L225             Difference]: With dead ends: 1058741
[2021-12-06 20:38:44,168 INFO  L226             Difference]: Without dead ends: 530219
[2021-12-06 20:38:44,370 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3565 GetRequests, 3559 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2021-12-06 20:38:44,370 INFO  L933         BasicCegarLoop]: 679 mSDtfsCounter, 1126 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 4892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2021-12-06 20:38:44,371 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 808 Invalid, 4892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2021-12-06 20:38:44,825 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 530219 states.
[2021-12-06 20:38:48,879 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 530219 to 516630.
[2021-12-06 20:38:49,115 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 516630 states, 516629 states have (on average 1.0086096599300465) internal successors, (521077), 516629 states have internal predecessors, (521077), 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 20:38:49,884 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 516630 states to 516630 states and 521077 transitions.
[2021-12-06 20:38:49,885 INFO  L78                 Accepts]: Start accepts. Automaton has 516630 states and 521077 transitions. Word has length 3560
[2021-12-06 20:38:49,886 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-06 20:38:49,886 INFO  L470      AbstractCegarLoop]: Abstraction has 516630 states and 521077 transitions.
[2021-12-06 20:38:49,886 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 1025.0) internal successors, (3075), 3 states have internal predecessors, (3075), 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 20:38:49,886 INFO  L276                IsEmpty]: Start isEmpty. Operand 516630 states and 521077 transitions.
[2021-12-06 20:38:50,574 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3588
[2021-12-06 20:38:50,574 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-06 20:38:50,576 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-06 20:38:50,597 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2021-12-06 20:38:50,776 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7e2a6-2742-4247-a606-049ca3fa9a2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2021-12-06 20:38:50,778 INFO  L402      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-06 20:38:50,779 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-06 20:38:50,782 INFO  L85        PathProgramCache]: Analyzing trace with hash -2089862816, now seen corresponding path program 1 times
[2021-12-06 20:38:50,782 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-06 20:38:50,783 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158249136]
[2021-12-06 20:38:50,784 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-06 20:38:50,784 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-06 20:38:51,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-06 20:38:52,912 INFO  L134       CoverageAnalysis]: Checked inductivity of 2394 backedges. 2394 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-06 20:38:52,912 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-06 20:38:52,913 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158249136]
[2021-12-06 20:38:52,913 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158249136] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-06 20:38:52,913 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-06 20:38:52,913 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-06 20:38:52,913 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3957045]
[2021-12-06 20:38:52,914 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-06 20:38:52,917 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-06 20:38:52,917 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-06 20:38:52,917 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-06 20:38:52,917 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:38:52,918 INFO  L87              Difference]: Start difference. First operand 516630 states and 521077 transitions. Second operand  has 3 states, 3 states have (on average 1195.6666666666667) internal successors, (3587), 3 states have internal predecessors, (3587), 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 20:38:58,349 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-06 20:38:58,350 INFO  L93              Difference]: Finished difference Result 1045188 states and 1054087 transitions.
[2021-12-06 20:38:58,350 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-06 20:38:58,350 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 1195.6666666666667) internal successors, (3587), 3 states have internal predecessors, (3587), 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 3587
[2021-12-06 20:38:58,351 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-06 20:38:58,961 INFO  L225             Difference]: With dead ends: 1045188
[2021-12-06 20:38:58,961 INFO  L226             Difference]: Without dead ends: 530257
[2021-12-06 20:38:59,110 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-06 20:38:59,110 INFO  L933         BasicCegarLoop]: 905 mSDtfsCounter, 475 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 4582 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 5216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 4582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2021-12-06 20:38:59,111 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1058 Invalid, 5216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 4582 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2021-12-06 20:38:59,491 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 530257 states.