/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-11 01:58:27,902 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-11 01:58:27,904 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-11 01:58:27,962 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-11 01:58:27,964 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-11 01:58:27,965 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-11 01:58:27,966 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-11 01:58:27,969 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2022-01-11 01:58:27,977 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-11 01:58:27,978 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-11 01:58:27,979 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-11 01:58:27,980 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-11 01:58:27,980 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-11 01:58:27,981 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-11 01:58:27,982 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-11 01:58:27,983 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-11 01:58:27,985 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-11 01:58:27,989 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-11 01:58:27,992 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-11 01:58:27,994 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-11 01:58:28,006 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-11 01:58:28,006 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-11 01:58:28,006 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-11 01:58:28,008 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-11 01:58:28,008 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-11 01:58:28,009 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-11 01:58:28,009 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-11 01:58:28,010 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-11 01:58:28,012 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-11 01:58:28,012 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-11 01:58:28,014 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-11 01:58:28,014 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2022-01-11 01:58:28,015 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-11 01:58:28,017 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-11 01:58:28,018 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf
[2022-01-11 01:58:28,045 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-11 01:58:28,046 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-11 01:58:28,046 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-11 01:58:28,046 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-11 01:58:28,047 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-11 01:58:28,047 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-11 01:58:28,048 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-11 01:58:28,048 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-11 01:58:28,048 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-11 01:58:28,048 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-11 01:58:28,048 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-11 01:58:28,048 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-11 01:58:28,048 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-11 01:58:28,048 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-11 01:58:28,049 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-11 01:58:28,049 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-11 01:58:28,049 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-11 01:58:28,049 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-11 01:58:28,049 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-11 01:58:28,049 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-11 01:58:28,049 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-11 01:58:28,049 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 01:58:28,050 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-11 01:58:28,050 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-11 01:58:28,050 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-11 01:58:28,050 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-11 01:58:28,050 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-11 01:58:28,050 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-11 01:58:28,050 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-11 01:58:28,051 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-11 01:58:28,051 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-11 01:58:28,051 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-11 01:58:28,052 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-11 01:58:28,052 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_SUM
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-11 01:58:28,270 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-11 01:58:28,302 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-11 01:58:28,304 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-11 01:58:28,305 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-11 01:58:28,306 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-11 01:58:28,307 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i
[2022-01-11 01:58:28,358 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c30a6873/ead873e4417d424c97747e0e61d511bc/FLAG4c0f4e9cd
[2022-01-11 01:58:28,758 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-11 01:58:28,759 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i
[2022-01-11 01:58:28,769 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c30a6873/ead873e4417d424c97747e0e61d511bc/FLAG4c0f4e9cd
[2022-01-11 01:58:29,160 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c30a6873/ead873e4417d424c97747e0e61d511bc
[2022-01-11 01:58:29,162 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-11 01:58:29,163 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-11 01:58:29,168 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-11 01:58:29,168 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-11 01:58:29,171 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-11 01:58:29,172 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,174 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe2b0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29, skipping insertion in model container
[2022-01-11 01:58:29,174 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,181 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-11 01:58:29,195 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-11 01:58:29,335 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i[834,847]
[2022-01-11 01:58:29,348 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 01:58:29,356 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-11 01:58:29,366 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i[834,847]
[2022-01-11 01:58:29,369 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 01:58:29,384 INFO  L208         MainTranslator]: Completed translation
[2022-01-11 01:58:29,384 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29 WrapperNode
[2022-01-11 01:58:29,384 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-11 01:58:29,386 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-11 01:58:29,386 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-11 01:58:29,386 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-11 01:58:29,393 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,400 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,412 INFO  L137                Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31
[2022-01-11 01:58:29,413 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-11 01:58:29,413 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-11 01:58:29,413 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-11 01:58:29,413 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-11 01:58:29,420 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,420 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,421 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,422 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,433 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,435 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,436 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,444 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-11 01:58:29,445 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-11 01:58:29,445 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-11 01:58:29,445 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-11 01:58:29,447 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,453 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 01:58:29,462 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:58:29,474 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-11 01:58:29,475 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-11 01:58:29,499 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-11 01:58:29,499 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-11 01:58:29,499 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-11 01:58:29,500 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-11 01:58:29,550 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-11 01:58:29,552 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-11 01:58:29,691 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-11 01:58:29,695 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-11 01:58:29,696 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-11 01:58:29,697 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:29 BoogieIcfgContainer
[2022-01-11 01:58:29,697 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-11 01:58:29,698 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-11 01:58:29,698 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-11 01:58:29,701 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-11 01:58:29,703 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:29" (1/1) ...
[2022-01-11 01:58:29,777 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:29 BasicIcfg
[2022-01-11 01:58:29,777 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-11 01:58:29,778 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-11 01:58:29,778 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-11 01:58:29,781 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-11 01:58:29,781 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 01:58:29" (1/4) ...
[2022-01-11 01:58:29,781 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d88ffbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:29, skipping insertion in model container
[2022-01-11 01:58:29,782 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:29" (2/4) ...
[2022-01-11 01:58:29,782 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d88ffbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:29, skipping insertion in model container
[2022-01-11 01:58:29,782 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:29" (3/4) ...
[2022-01-11 01:58:29,782 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d88ffbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 01:58:29, skipping insertion in model container
[2022-01-11 01:58:29,782 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:29" (4/4) ...
[2022-01-11 01:58:29,783 INFO  L111   eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.iTransformedIcfg
[2022-01-11 01:58:29,801 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-11 01:58:29,801 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-11 01:58:29,874 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-11 01:58:29,896 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
[2022-01-11 01:58:29,896 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-11 01:58:29,907 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:29,911 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-11 01:58:29,912 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:29,912 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:29,913 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:29,921 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:29,921 INFO  L85        PathProgramCache]: Analyzing trace with hash 1953496264, now seen corresponding path program 1 times
[2022-01-11 01:58:29,928 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:29,929 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196891875]
[2022-01-11 01:58:29,929 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:29,930 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:30,034 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:30,083 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:30,084 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:30,084 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196891875]
[2022-01-11 01:58:30,085 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196891875] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 01:58:30,085 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 01:58:30,085 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-11 01:58:30,087 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545171893]
[2022-01-11 01:58:30,088 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 01:58:30,091 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-11 01:58:30,092 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:30,121 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-11 01:58:30,122 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-11 01:58:30,124 INFO  L87              Difference]: Start difference. First operand  has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,138 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:30,139 INFO  L93              Difference]: Finished difference Result 21 states and 24 transitions.
[2022-01-11 01:58:30,140 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-11 01:58:30,141 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6
[2022-01-11 01:58:30,141 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:30,148 INFO  L225             Difference]: With dead ends: 21
[2022-01-11 01:58:30,148 INFO  L226             Difference]: Without dead ends: 9
[2022-01-11 01:58:30,151 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-11 01:58:30,155 INFO  L933         BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 01:58:30,156 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 01:58:30,172 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2022-01-11 01:58:30,193 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9.
[2022-01-11 01:58:30,194 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,195 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions.
[2022-01-11 01:58:30,196 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6
[2022-01-11 01:58:30,196 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:30,197 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 10 transitions.
[2022-01-11 01:58:30,197 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,198 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions.
[2022-01-11 01:58:30,198 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-11 01:58:30,199 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:30,199 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:30,199 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-11 01:58:30,199 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:30,201 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:30,202 INFO  L85        PathProgramCache]: Analyzing trace with hash 1953526055, now seen corresponding path program 1 times
[2022-01-11 01:58:30,202 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:30,202 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668925457]
[2022-01-11 01:58:30,202 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:30,203 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:30,244 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:30,310 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:30,310 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:30,310 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668925457]
[2022-01-11 01:58:30,310 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668925457] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 01:58:30,311 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 01:58:30,311 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-11 01:58:30,311 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560044280]
[2022-01-11 01:58:30,311 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 01:58:30,312 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-11 01:58:30,312 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:30,313 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-11 01:58:30,313 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-11 01:58:30,313 INFO  L87              Difference]: Start difference. First operand 9 states and 10 transitions. Second operand  has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,354 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:30,354 INFO  L93              Difference]: Finished difference Result 14 states and 15 transitions.
[2022-01-11 01:58:30,354 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-11 01:58:30,355 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6
[2022-01-11 01:58:30,355 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:30,355 INFO  L225             Difference]: With dead ends: 14
[2022-01-11 01:58:30,355 INFO  L226             Difference]: Without dead ends: 10
[2022-01-11 01:58:30,356 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-11 01:58:30,357 INFO  L933         BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 01:58:30,357 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 01:58:30,358 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-01-11 01:58:30,360 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2022-01-11 01:58:30,360 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions.
[2022-01-11 01:58:30,360 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6
[2022-01-11 01:58:30,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:30,361 INFO  L470      AbstractCegarLoop]: Abstraction has 10 states and 11 transitions.
[2022-01-11 01:58:30,361 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions.
[2022-01-11 01:58:30,361 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-11 01:58:30,361 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:30,362 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:30,362 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-11 01:58:30,362 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:30,363 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:30,363 INFO  L85        PathProgramCache]: Analyzing trace with hash 1605626063, now seen corresponding path program 1 times
[2022-01-11 01:58:30,363 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:30,363 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581632826]
[2022-01-11 01:58:30,363 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:30,363 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:30,381 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:30,401 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:30,401 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:30,401 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581632826]
[2022-01-11 01:58:30,402 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581632826] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 01:58:30,402 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 01:58:30,402 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-11 01:58:30,402 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445660967]
[2022-01-11 01:58:30,402 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 01:58:30,402 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-11 01:58:30,403 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:30,403 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-11 01:58:30,403 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-11 01:58:30,403 INFO  L87              Difference]: Start difference. First operand 10 states and 11 transitions. Second operand  has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,424 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:30,424 INFO  L93              Difference]: Finished difference Result 19 states and 22 transitions.
[2022-01-11 01:58:30,425 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-11 01:58:30,425 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9
[2022-01-11 01:58:30,425 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:30,426 INFO  L225             Difference]: With dead ends: 19
[2022-01-11 01:58:30,426 INFO  L226             Difference]: Without dead ends: 12
[2022-01-11 01:58:30,428 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
[2022-01-11 01:58:30,431 INFO  L933         BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 01:58:30,433 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 01:58:30,434 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2022-01-11 01:58:30,439 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11.
[2022-01-11 01:58:30,440 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,440 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions.
[2022-01-11 01:58:30,441 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9
[2022-01-11 01:58:30,441 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:30,441 INFO  L470      AbstractCegarLoop]: Abstraction has 11 states and 12 transitions.
[2022-01-11 01:58:30,441 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:30,441 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions.
[2022-01-11 01:58:30,441 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2022-01-11 01:58:30,442 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:30,442 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:30,442 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-11 01:58:30,442 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:30,443 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:30,444 INFO  L85        PathProgramCache]: Analyzing trace with hash 1634255214, now seen corresponding path program 1 times
[2022-01-11 01:58:30,444 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:30,444 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020714077]
[2022-01-11 01:58:30,444 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:30,444 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:30,510 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:30,889 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:30,890 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:30,890 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020714077]
[2022-01-11 01:58:30,890 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020714077] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 01:58:30,890 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249605481]
[2022-01-11 01:58:30,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:30,890 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:58:30,891 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:58:30,892 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-11 01:58:30,893 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-11 01:58:30,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:30,983 INFO  L263         TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-01-11 01:58:30,988 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 01:58:31,341 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:31,341 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 01:58:32,022 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:32,023 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [249605481] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 01:58:32,023 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 01:58:32,023 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15
[2022-01-11 01:58:32,023 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188943671]
[2022-01-11 01:58:32,023 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 01:58:32,023 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-01-11 01:58:32,024 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:32,024 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-01-11 01:58:32,024 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210
[2022-01-11 01:58:32,025 INFO  L87              Difference]: Start difference. First operand 11 states and 12 transitions. Second operand  has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:32,278 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:32,278 INFO  L93              Difference]: Finished difference Result 23 states and 26 transitions.
[2022-01-11 01:58:32,278 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-01-11 01:58:32,279 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 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 9
[2022-01-11 01:58:32,279 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:32,279 INFO  L225             Difference]: With dead ends: 23
[2022-01-11 01:58:32,279 INFO  L226             Difference]: Without dead ends: 17
[2022-01-11 01:58:32,280 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306
[2022-01-11 01:58:32,281 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-11 01:58:32,281 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time]
[2022-01-11 01:58:32,282 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2022-01-11 01:58:32,284 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16.
[2022-01-11 01:58:32,285 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:32,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions.
[2022-01-11 01:58:32,285 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9
[2022-01-11 01:58:32,285 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:32,286 INFO  L470      AbstractCegarLoop]: Abstraction has 16 states and 18 transitions.
[2022-01-11 01:58:32,286 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:32,286 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions.
[2022-01-11 01:58:32,286 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-11 01:58:32,286 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:32,286 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:32,294 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-11 01:58:32,491 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:58:32,491 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:32,492 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:32,492 INFO  L85        PathProgramCache]: Analyzing trace with hash -734404824, now seen corresponding path program 1 times
[2022-01-11 01:58:32,492 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:32,492 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310693031]
[2022-01-11 01:58:32,492 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:32,493 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:32,507 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:32,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:32,548 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:32,549 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310693031]
[2022-01-11 01:58:32,549 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310693031] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 01:58:32,549 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876732724]
[2022-01-11 01:58:32,549 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:32,549 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:58:32,549 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:58:32,550 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-11 01:58:32,553 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-11 01:58:32,591 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:32,592 INFO  L263         TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-01-11 01:58:32,593 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 01:58:32,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:32,629 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 01:58:32,684 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:32,684 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876732724] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 01:58:32,684 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 01:58:32,684 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8
[2022-01-11 01:58:32,684 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041490425]
[2022-01-11 01:58:32,685 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 01:58:32,685 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-11 01:58:32,685 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:32,685 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-11 01:58:32,686 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56
[2022-01-11 01:58:32,686 INFO  L87              Difference]: Start difference. First operand 16 states and 18 transitions. Second operand  has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:32,723 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:32,724 INFO  L93              Difference]: Finished difference Result 30 states and 34 transitions.
[2022-01-11 01:58:32,724 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-11 01:58:32,724 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 12
[2022-01-11 01:58:32,724 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:32,725 INFO  L225             Difference]: With dead ends: 30
[2022-01-11 01:58:32,725 INFO  L226             Difference]: Without dead ends: 23
[2022-01-11 01:58:32,725 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56
[2022-01-11 01:58:32,726 INFO  L933         BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 01:58:32,726 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 01:58:32,726 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2022-01-11 01:58:32,728 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19.
[2022-01-11 01:58:32,728 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:32,729 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions.
[2022-01-11 01:58:32,729 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12
[2022-01-11 01:58:32,729 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:32,729 INFO  L470      AbstractCegarLoop]: Abstraction has 19 states and 21 transitions.
[2022-01-11 01:58:32,729 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-11 01:58:32,729 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions.
[2022-01-11 01:58:32,729 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2022-01-11 01:58:32,730 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:32,730 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:32,748 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-01-11 01:58:32,930 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:58:32,930 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:32,931 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:32,931 INFO  L85        PathProgramCache]: Analyzing trace with hash -951748914, now seen corresponding path program 2 times
[2022-01-11 01:58:32,931 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:32,931 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676358636]
[2022-01-11 01:58:32,931 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:32,931 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:33,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:50,284 WARN  L228               SmtUtils]: Spent 7.77s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-11 01:59:18,528 WARN  L228               SmtUtils]: Spent 9.58s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-11 01:59:28,709 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:59:28,709 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:59:28,710 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676358636]
[2022-01-11 01:59:28,710 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676358636] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 01:59:28,710 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793753637]
[2022-01-11 01:59:28,710 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-11 01:59:28,710 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:59:28,710 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:59:28,711 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-11 01:59:28,711 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-11 01:59:28,839 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-11 01:59:28,840 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 01:59:28,841 INFO  L263         TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core
[2022-01-11 01:59:28,842 INFO  L286         TraceCheckSpWp]: Computing forward predicates...