/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/array-crafted/zero_sum5.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-11 03:11:28,715 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-11 03:11:28,716 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-11 03:11:28,762 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-11 03:11:28,763 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-11 03:11:28,765 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-11 03:11:28,769 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-11 03:11:28,773 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-11 03:11:28,775 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-11 03:11:28,778 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-11 03:11:28,778 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-11 03:11:28,779 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-11 03:11:28,779 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-11 03:11:28,782 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-11 03:11:28,783 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-11 03:11:28,784 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-11 03:11:28,784 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-11 03:11:28,785 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-11 03:11:28,786 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-11 03:11:28,786 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-11 03:11:28,787 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-11 03:11:28,791 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-11 03:11:28,793 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-11 03:11:28,794 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-11 03:11:28,799 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-11 03:11:28,800 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-11 03:11:28,800 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-11 03:11:28,800 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-11 03:11:28,800 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-11 03:11:28,801 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-11 03:11:28,801 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-11 03:11:28,802 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-11 03:11:28,802 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-11 03:11:28,802 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-11 03:11:28,803 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-11 03:11:28,803 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-11 03:11:28,803 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-11 03:11:28,804 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-11 03:11:28,804 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-11 03:11:28,804 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-11 03:11:28,805 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-11 03:11:28,805 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 03:11:28,818 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-11 03:11:28,818 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-11 03:11:28,818 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-11 03:11:28,819 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-11 03:11:28,820 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-11 03:11:28,820 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-11 03:11:28,820 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-11 03:11:28,821 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-11 03:11:28,821 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-11 03:11:28,821 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-11 03:11:28,821 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-11 03:11:28,821 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-11 03:11:28,821 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-11 03:11:28,821 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-11 03:11:28,821 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-11 03:11:28,822 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-11 03:11:28,822 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-11 03:11:28,822 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-11 03:11:28,822 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-11 03:11:28,822 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-11 03:11:28,823 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-11 03:11:28,823 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 03:11:28,823 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-11 03:11:28,823 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-11 03:11:28,823 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-11 03:11:28,824 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-11 03:11:28,824 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-11 03:11:28,824 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-11 03:11:28,824 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-11 03:11:28,824 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-11 03:11:28,824 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-11 03:11:28,824 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-11 03:11:28,825 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-11 03:11:28,825 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-11 03:11:29,006 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-11 03:11:29,019 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-11 03:11:29,021 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-11 03:11:29,021 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-11 03:11:29,022 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-11 03:11:29,023 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c
[2022-01-11 03:11:29,061 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5679b1461/4b370f522f95442ea8223ad5543ca38c/FLAGede85bfce
[2022-01-11 03:11:29,424 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-11 03:11:29,424 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c
[2022-01-11 03:11:29,432 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5679b1461/4b370f522f95442ea8223ad5543ca38c/FLAGede85bfce
[2022-01-11 03:11:29,441 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5679b1461/4b370f522f95442ea8223ad5543ca38c
[2022-01-11 03:11:29,443 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-11 03:11:29,444 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-11 03:11:29,448 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-11 03:11:29,448 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-11 03:11:29,450 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-11 03:11:29,451 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,453 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1f30e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29, skipping insertion in model container
[2022-01-11 03:11:29,453 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,458 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-11 03:11:29,467 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-11 03:11:29,622 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c[400,413]
[2022-01-11 03:11:29,666 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 03:11:29,676 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-11 03:11:29,686 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c[400,413]
[2022-01-11 03:11:29,703 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 03:11:29,713 INFO  L208         MainTranslator]: Completed translation
[2022-01-11 03:11:29,713 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29 WrapperNode
[2022-01-11 03:11:29,714 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-11 03:11:29,714 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-11 03:11:29,714 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-11 03:11:29,714 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-11 03:11:29,719 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,727 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,751 INFO  L137                Inliner]: procedures = 17, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147
[2022-01-11 03:11:29,751 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-11 03:11:29,751 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-11 03:11:29,751 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-11 03:11:29,752 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-11 03:11:29,757 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,757 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,760 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,760 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,764 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,767 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,768 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,769 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-11 03:11:29,770 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-11 03:11:29,770 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-11 03:11:29,770 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-11 03:11:29,773 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (1/1) ...
[2022-01-11 03:11:29,780 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 03:11:29,787 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 03:11:29,797 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 03:11:29,800 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 03:11:29,834 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-11 03:11:29,834 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-11 03:11:29,834 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-01-11 03:11:29,834 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE2
[2022-01-11 03:11:29,834 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-11 03:11:29,834 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-11 03:11:29,834 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE2
[2022-01-11 03:11:29,835 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-11 03:11:29,877 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-11 03:11:29,878 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-11 03:11:30,052 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-11 03:11:30,057 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-11 03:11:30,057 INFO  L299             CfgBuilder]: Removed 11 assume(true) statements.
[2022-01-11 03:11:30,058 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:11:30 BoogieIcfgContainer
[2022-01-11 03:11:30,058 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-11 03:11:30,059 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-11 03:11:30,059 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-11 03:11:30,060 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-11 03:11:30,062 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:11:30" (1/1) ...
[2022-01-11 03:11:30,249 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:11:30 BasicIcfg
[2022-01-11 03:11:30,249 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-11 03:11:30,250 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-11 03:11:30,250 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-11 03:11:30,252 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-11 03:11:30,252 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 03:11:29" (1/4) ...
[2022-01-11 03:11:30,253 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e9a753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:11:30, skipping insertion in model container
[2022-01-11 03:11:30,253 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:11:29" (2/4) ...
[2022-01-11 03:11:30,253 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e9a753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:11:30, skipping insertion in model container
[2022-01-11 03:11:30,253 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:11:30" (3/4) ...
[2022-01-11 03:11:30,253 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e9a753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 03:11:30, skipping insertion in model container
[2022-01-11 03:11:30,253 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:11:30" (4/4) ...
[2022-01-11 03:11:30,254 INFO  L111   eAbstractionObserver]: Analyzing ICFG zero_sum5.cTransformedIcfg
[2022-01-11 03:11:30,257 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-11 03:11:30,257 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-11 03:11:30,283 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-11 03:11:30,288 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 03:11:30,288 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-11 03:11:30,295 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 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 03:11:30,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-01-11 03:11:30,298 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 03:11:30,299 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]
[2022-01-11 03:11:30,299 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 03:11:30,302 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 03:11:30,302 INFO  L85        PathProgramCache]: Analyzing trace with hash 2008623670, now seen corresponding path program 1 times
[2022-01-11 03:11:30,307 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 03:11:30,307 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730518808]
[2022-01-11 03:11:30,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 03:11:30,307 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 03:11:30,405 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 03:11:30,476 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 03:11:30,476 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 03:11:30,476 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730518808]
[2022-01-11 03:11:30,477 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730518808] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 03:11:30,477 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 03:11:30,477 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-11 03:11:30,478 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140717489]
[2022-01-11 03:11:30,479 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 03:11:30,482 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-11 03:11:30,482 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 03:11:30,504 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-11 03:11:30,505 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-11 03:11:30,507 INFO  L87              Difference]: Start difference. First operand  has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 03:11:30,526 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 03:11:30,526 INFO  L93              Difference]: Finished difference Result 83 states and 126 transitions.
[2022-01-11 03:11:30,526 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-11 03:11:30,527 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27
[2022-01-11 03:11:30,527 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 03:11:30,531 INFO  L225             Difference]: With dead ends: 83
[2022-01-11 03:11:30,532 INFO  L226             Difference]: Without dead ends: 39
[2022-01-11 03:11:30,533 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 03:11:30,536 INFO  L933         BasicCegarLoop]: 55 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, 55 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 03:11:30,537 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 03:11:30,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2022-01-11 03:11:30,557 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2022-01-11 03:11:30,558 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 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 03:11:30,559 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions.
[2022-01-11 03:11:30,559 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27
[2022-01-11 03:11:30,560 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 03:11:30,560 INFO  L470      AbstractCegarLoop]: Abstraction has 39 states and 49 transitions.
[2022-01-11 03:11:30,560 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 03:11:30,562 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions.
[2022-01-11 03:11:30,563 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-01-11 03:11:30,563 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 03:11:30,563 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]
[2022-01-11 03:11:30,563 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-11 03:11:30,564 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 03:11:30,564 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 03:11:30,564 INFO  L85        PathProgramCache]: Analyzing trace with hash -814390261, now seen corresponding path program 1 times
[2022-01-11 03:11:30,564 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 03:11:30,565 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368770130]
[2022-01-11 03:11:30,565 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 03:11:30,565 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 03:11:30,626 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 03:11:30,716 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 03:11:30,717 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 03:11:30,717 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368770130]
[2022-01-11 03:11:30,717 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368770130] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 03:11:30,717 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 03:11:30,717 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-11 03:11:30,717 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247267412]
[2022-01-11 03:11:30,717 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 03:11:30,718 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-11 03:11:30,718 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 03:11:30,719 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-11 03:11:30,719 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-11 03:11:30,719 INFO  L87              Difference]: Start difference. First operand 39 states and 49 transitions. Second operand  has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 03:11:30,888 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 03:11:30,888 INFO  L93              Difference]: Finished difference Result 62 states and 81 transitions.
[2022-01-11 03:11:30,888 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-11 03:11:30,888 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27
[2022-01-11 03:11:30,889 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 03:11:30,889 INFO  L225             Difference]: With dead ends: 62
[2022-01-11 03:11:30,889 INFO  L226             Difference]: Without dead ends: 58
[2022-01-11 03:11:30,890 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 03:11:30,890 INFO  L933         BasicCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-11 03:11:30,891 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 107 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-11 03:11:30,891 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2022-01-11 03:11:30,895 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58.
[2022-01-11 03:11:30,895 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 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 03:11:30,896 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions.
[2022-01-11 03:11:30,896 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27
[2022-01-11 03:11:30,896 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 03:11:30,896 INFO  L470      AbstractCegarLoop]: Abstraction has 58 states and 77 transitions.
[2022-01-11 03:11:30,897 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 03:11:30,897 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions.
[2022-01-11 03:11:30,897 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-01-11 03:11:30,897 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 03:11:30,897 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]
[2022-01-11 03:11:30,898 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-11 03:11:30,898 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 03:11:30,898 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 03:11:30,898 INFO  L85        PathProgramCache]: Analyzing trace with hash -915555635, now seen corresponding path program 1 times
[2022-01-11 03:11:30,898 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 03:11:30,898 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450673093]
[2022-01-11 03:11:30,899 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 03:11:30,899 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 03:11:30,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 03:11:31,023 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-01-11 03:11:31,023 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 03:11:31,023 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450673093]
[2022-01-11 03:11:31,024 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450673093] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 03:11:31,024 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 03:11:31,024 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-11 03:11:31,025 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387301471]
[2022-01-11 03:11:31,025 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 03:11:31,025 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-11 03:11:31,026 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 03:11:31,026 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-11 03:11:31,026 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-11 03:11:31,026 INFO  L87              Difference]: Start difference. First operand 58 states and 77 transitions. Second operand  has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 03:11:31,206 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 03:11:31,206 INFO  L93              Difference]: Finished difference Result 113 states and 151 transitions.
[2022-01-11 03:11:31,208 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-11 03:11:31,208 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29
[2022-01-11 03:11:31,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 03:11:31,208 INFO  L225             Difference]: With dead ends: 113
[2022-01-11 03:11:31,209 INFO  L226             Difference]: Without dead ends: 60
[2022-01-11 03:11:31,209 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 03:11:31,210 INFO  L933         BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-11 03:11:31,210 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-11 03:11:31,211 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2022-01-11 03:11:31,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59.
[2022-01-11 03:11:31,216 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 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 03:11:31,216 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions.
[2022-01-11 03:11:31,216 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 29
[2022-01-11 03:11:31,216 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 03:11:31,217 INFO  L470      AbstractCegarLoop]: Abstraction has 59 states and 78 transitions.
[2022-01-11 03:11:31,217 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 03:11:31,217 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions.
[2022-01-11 03:11:31,217 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-01-11 03:11:31,217 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 03:11:31,217 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]
[2022-01-11 03:11:31,218 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-11 03:11:31,218 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 03:11:31,218 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 03:11:31,218 INFO  L85        PathProgramCache]: Analyzing trace with hash -706774096, now seen corresponding path program 1 times
[2022-01-11 03:11:31,218 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 03:11:31,218 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593145105]
[2022-01-11 03:11:31,219 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 03:11:31,219 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 03:11:31,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 03:11:31,350 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-11 03:11:31,350 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 03:11:31,350 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593145105]
[2022-01-11 03:11:31,350 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593145105] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 03:11:31,350 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 03:11:31,351 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-11 03:11:31,351 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028867637]
[2022-01-11 03:11:31,351 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 03:11:31,352 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-11 03:11:31,353 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 03:11:31,353 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-11 03:11:31,353 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-11 03:11:31,354 INFO  L87              Difference]: Start difference. First operand 59 states and 78 transitions. Second operand  has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 03:11:31,639 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 03:11:31,640 INFO  L93              Difference]: Finished difference Result 108 states and 144 transitions.
[2022-01-11 03:11:31,640 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-11 03:11:31,640 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 31
[2022-01-11 03:11:31,640 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 03:11:31,641 INFO  L225             Difference]: With dead ends: 108
[2022-01-11 03:11:31,641 INFO  L226             Difference]: Without dead ends: 60
[2022-01-11 03:11:31,641 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-01-11 03:11:31,642 INFO  L933         BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-01-11 03:11:31,643 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-01-11 03:11:31,643 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2022-01-11 03:11:31,651 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50.
[2022-01-11 03:11:31,651 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 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 03:11:31,654 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions.
[2022-01-11 03:11:31,654 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31
[2022-01-11 03:11:31,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 03:11:31,654 INFO  L470      AbstractCegarLoop]: Abstraction has 50 states and 60 transitions.
[2022-01-11 03:11:31,655 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 03:11:31,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions.
[2022-01-11 03:11:31,657 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-01-11 03:11:31,657 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 03:11:31,657 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]
[2022-01-11 03:11:31,658 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-01-11 03:11:31,658 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 03:11:31,660 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 03:11:31,660 INFO  L85        PathProgramCache]: Analyzing trace with hash 2036955715, now seen corresponding path program 1 times
[2022-01-11 03:11:31,660 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 03:11:31,660 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894074660]
[2022-01-11 03:11:31,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 03:11:31,661 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 03:11:31,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 03:11:31,851 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-01-11 03:11:31,852 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 03:11:31,852 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894074660]
[2022-01-11 03:11:31,852 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894074660] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 03:11:31,853 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169223835]
[2022-01-11 03:11:31,853 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 03:11:31,854 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 03:11:31,854 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 03:11:31,855 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 03:11:31,889 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 03:11:32,089 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 03:11:32,102 INFO  L263         TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-11 03:11:32,106 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 03:11:32,549 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-01-11 03:11:32,549 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 03:11:34,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2022-01-11 03:11:34,416 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [169223835] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 03:11:34,416 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 03:11:34,416 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6
[2022-01-11 03:11:34,417 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216926696]
[2022-01-11 03:11:34,417 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 03:11:34,417 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-11 03:11:34,417 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 03:11:34,417 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-11 03:11:34,418 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-11 03:11:34,418 INFO  L87              Difference]: Start difference. First operand 50 states and 60 transitions. Second operand  has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 03:11:34,771 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 03:11:34,771 INFO  L93              Difference]: Finished difference Result 97 states and 117 transitions.
[2022-01-11 03:11:34,773 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-11 03:11:34,774 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 49
[2022-01-11 03:11:34,774 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 03:11:34,774 INFO  L225             Difference]: With dead ends: 97
[2022-01-11 03:11:34,774 INFO  L226             Difference]: Without dead ends: 53
[2022-01-11 03:11:34,775 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2022-01-11 03:11:34,775 INFO  L933         BasicCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-01-11 03:11:34,776 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 116 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-01-11 03:11:34,776 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2022-01-11 03:11:34,781 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52.
[2022-01-11 03:11:34,782 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 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 03:11:34,782 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions.
[2022-01-11 03:11:34,782 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49
[2022-01-11 03:11:34,782 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 03:11:34,782 INFO  L470      AbstractCegarLoop]: Abstraction has 52 states and 62 transitions.
[2022-01-11 03:11:34,783 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 03:11:34,783 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions.
[2022-01-11 03:11:34,783 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2022-01-11 03:11:34,783 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 03:11:34,783 INFO  L514         BasicCegarLoop]: trace histogram [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]
[2022-01-11 03:11:34,806 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 03:11:35,000 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 03:11:35,001 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 03:11:35,001 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 03:11:35,001 INFO  L85        PathProgramCache]: Analyzing trace with hash -954405978, now seen corresponding path program 2 times
[2022-01-11 03:11:35,001 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 03:11:35,001 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348905426]
[2022-01-11 03:11:35,002 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 03:11:35,002 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 03:11:35,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 03:11:35,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2022-01-11 03:11:35,142 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 03:11:35,142 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348905426]
[2022-01-11 03:11:35,142 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348905426] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 03:11:35,143 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754172538]
[2022-01-11 03:11:35,143 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-11 03:11:35,143 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 03:11:35,143 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 03:11:35,144 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 03:11:35,145 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 03:11:35,285 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-11 03:11:35,285 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 03:11:35,287 INFO  L263         TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-01-11 03:11:35,289 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 03:11:35,785 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2022-01-11 03:11:35,785 INFO  L328         TraceCheckSpWp]: Computing backward predicates...