/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/sum04-2.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-11 01:58:56,896 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-11 01:58:56,897 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-11 01:58:56,953 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-11 01:58:56,954 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-11 01:58:56,954 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-11 01:58:56,955 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-11 01:58:56,957 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-11 01:58:56,958 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-11 01:58:56,958 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-11 01:58:56,962 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-11 01:58:56,962 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-11 01:58:56,963 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-11 01:58:56,964 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-11 01:58:56,964 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-11 01:58:56,965 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-11 01:58:56,965 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-11 01:58:56,966 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-11 01:58:56,968 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-11 01:58:56,968 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-11 01:58:56,969 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-11 01:58:56,970 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-11 01:58:56,971 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-11 01:58:56,972 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-11 01:58:56,973 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-11 01:58:56,973 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-11 01:58:56,974 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-11 01:58:56,974 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-11 01:58:56,974 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-11 01:58:56,975 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-11 01:58:56,975 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-11 01:58:56,976 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-11 01:58:56,976 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-11 01:58:56,977 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-11 01:58:56,977 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-11 01:58:56,977 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-11 01:58:56,978 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-11 01:58:56,978 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-11 01:58:56,978 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-11 01:58:56,979 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-11 01:58:56,980 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 01:58:56,994 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-11 01:58:56,994 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-11 01:58:56,994 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-11 01:58:56,994 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-11 01:58:56,995 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-11 01:58:56,995 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-11 01:58:56,995 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-11 01:58:56,995 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-11 01:58:56,995 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-11 01:58:56,995 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-11 01:58:56,996 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-11 01:58:56,996 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-11 01:58:56,996 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-11 01:58:56,996 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-11 01:58:56,997 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-11 01:58:56,997 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-11 01:58:56,997 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-11 01:58:56,997 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-11 01:58:56,997 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-11 01:58:56,997 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-11 01:58:56,997 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-11 01:58:56,998 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 01:58:56,998 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-11 01:58:56,998 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-11 01:58:56,999 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-11 01:58:57,001 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-11 01:58:57,001 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-11 01:58:57,197 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-11 01:58:57,228 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-11 01:58:57,230 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-11 01:58:57,231 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-11 01:58:57,231 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-11 01:58:57,232 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i
[2022-01-11 01:58:57,293 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62b74a2b/1e07e1605cda4419980f4d37a85fb84e/FLAGab7bcb836
[2022-01-11 01:58:57,650 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-11 01:58:57,651 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i
[2022-01-11 01:58:57,655 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62b74a2b/1e07e1605cda4419980f4d37a85fb84e/FLAGab7bcb836
[2022-01-11 01:58:57,666 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62b74a2b/1e07e1605cda4419980f4d37a85fb84e
[2022-01-11 01:58:57,669 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-11 01:58:57,669 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-11 01:58:57,671 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-11 01:58:57,671 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-11 01:58:57,674 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-11 01:58:57,675 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,675 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb49461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57, skipping insertion in model container
[2022-01-11 01:58:57,675 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,679 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-11 01:58:57,689 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-11 01:58:57,801 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/sum04-2.i[808,821]
[2022-01-11 01:58:57,818 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 01:58:57,828 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-11 01:58:57,837 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/sum04-2.i[808,821]
[2022-01-11 01:58:57,838 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 01:58:57,846 INFO  L208         MainTranslator]: Completed translation
[2022-01-11 01:58:57,847 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57 WrapperNode
[2022-01-11 01:58:57,847 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-11 01:58:57,848 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-11 01:58:57,848 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-11 01:58:57,848 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-11 01:58:57,852 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,857 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,866 INFO  L137                Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27
[2022-01-11 01:58:57,866 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-11 01:58:57,867 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-11 01:58:57,867 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-11 01:58:57,867 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-11 01:58:57,872 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,872 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,873 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,873 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,876 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,878 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,878 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,879 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-11 01:58:57,880 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-11 01:58:57,880 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-11 01:58:57,880 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-11 01:58:57,880 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (1/1) ...
[2022-01-11 01:58:57,885 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 01:58:57,891 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:58:57,912 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 01:58:57,931 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 01:58:57,941 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-11 01:58:57,941 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-11 01:58:57,942 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-11 01:58:57,942 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-11 01:58:57,983 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-11 01:58:57,984 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-11 01:58:58,068 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-11 01:58:58,071 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-11 01:58:58,072 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-11 01:58:58,073 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:58 BoogieIcfgContainer
[2022-01-11 01:58:58,073 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-11 01:58:58,073 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-11 01:58:58,073 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-11 01:58:58,074 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-11 01:58:58,076 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:58" (1/1) ...
[2022-01-11 01:58:58,104 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:58 BasicIcfg
[2022-01-11 01:58:58,104 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-11 01:58:58,105 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-11 01:58:58,105 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-11 01:58:58,107 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-11 01:58:58,107 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 01:58:57" (1/4) ...
[2022-01-11 01:58:58,108 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba15153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:58, skipping insertion in model container
[2022-01-11 01:58:58,108 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:57" (2/4) ...
[2022-01-11 01:58:58,108 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba15153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:58, skipping insertion in model container
[2022-01-11 01:58:58,108 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:58" (3/4) ...
[2022-01-11 01:58:58,108 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba15153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 01:58:58, skipping insertion in model container
[2022-01-11 01:58:58,108 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:58" (4/4) ...
[2022-01-11 01:58:58,109 INFO  L111   eAbstractionObserver]: Analyzing ICFG sum04-2.iTransformedIcfg
[2022-01-11 01:58:58,112 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-11 01:58:58,112 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-11 01:58:58,175 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-11 01:58:58,194 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 01:58:58,194 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-11 01:58:58,203 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 01:58:58,206 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-11 01:58:58,206 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:58,207 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:58,207 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:58,223 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:58,223 INFO  L85        PathProgramCache]: Analyzing trace with hash 1805578951, now seen corresponding path program 1 times
[2022-01-11 01:58:58,229 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:58,229 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595849409]
[2022-01-11 01:58:58,230 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:58,230 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:58,307 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:58,357 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 01:58:58,358 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:58,358 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595849409]
[2022-01-11 01:58:58,359 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595849409] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 01:58:58,359 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 01:58:58,359 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-11 01:58:58,360 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644580571]
[2022-01-11 01:58:58,361 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 01:58:58,364 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-11 01:58:58,364 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:58,386 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-11 01:58:58,387 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-11 01:58:58,389 INFO  L87              Difference]: Start difference. First operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 01:58:58,400 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:58,400 INFO  L93              Difference]: Finished difference Result 20 states and 22 transitions.
[2022-01-11 01:58:58,401 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-11 01:58:58,402 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 01:58:58,403 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:58,409 INFO  L225             Difference]: With dead ends: 20
[2022-01-11 01:58:58,409 INFO  L226             Difference]: Without dead ends: 8
[2022-01-11 01:58:58,411 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 01:58:58,415 INFO  L933         BasicCegarLoop]: 12 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, 12 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 01:58:58,416 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 01:58:58,428 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2022-01-11 01:58:58,439 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2022-01-11 01:58:58,440 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 01:58:58,440 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2022-01-11 01:58:58,441 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6
[2022-01-11 01:58:58,442 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:58,442 INFO  L470      AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2022-01-11 01:58:58,442 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 01:58:58,442 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2022-01-11 01:58:58,443 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-11 01:58:58,443 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:58,443 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:58,443 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-11 01:58:58,444 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:58,444 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:58,444 INFO  L85        PathProgramCache]: Analyzing trace with hash 1805608742, now seen corresponding path program 1 times
[2022-01-11 01:58:58,444 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:58,445 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597842195]
[2022-01-11 01:58:58,445 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:58,445 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:58,462 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:58,506 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 01:58:58,507 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:58,507 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597842195]
[2022-01-11 01:58:58,508 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597842195] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 01:58:58,508 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 01:58:58,508 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-11 01:58:58,509 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894632889]
[2022-01-11 01:58:58,509 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 01:58:58,510 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-11 01:58:58,510 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:58,511 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-11 01:58:58,511 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-11 01:58:58,511 INFO  L87              Difference]: Start difference. First operand 8 states and 8 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 01:58:58,538 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:58,539 INFO  L93              Difference]: Finished difference Result 13 states and 13 transitions.
[2022-01-11 01:58:58,539 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-11 01:58:58,539 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 01:58:58,539 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:58,540 INFO  L225             Difference]: With dead ends: 13
[2022-01-11 01:58:58,540 INFO  L226             Difference]: Without dead ends: 9
[2022-01-11 01:58:58,543 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 01:58:58,545 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 01:58:58,545 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 01:58:58,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2022-01-11 01:58:58,548 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9.
[2022-01-11 01:58:58,548 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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 01:58:58,549 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2022-01-11 01:58:58,549 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6
[2022-01-11 01:58:58,549 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:58,549 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2022-01-11 01:58:58,550 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 01:58:58,550 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2022-01-11 01:58:58,550 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-11 01:58:58,550 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:58,550 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:58,550 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-11 01:58:58,550 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:58,551 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:58,551 INFO  L85        PathProgramCache]: Analyzing trace with hash 52644360, now seen corresponding path program 1 times
[2022-01-11 01:58:58,551 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:58,551 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904674142]
[2022-01-11 01:58:58,551 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:58,551 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:58,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:58,660 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 01:58:58,660 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:58,660 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904674142]
[2022-01-11 01:58:58,661 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904674142] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 01:58:58,661 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002242067]
[2022-01-11 01:58:58,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:58,661 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:58:58,661 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:58:58,663 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 01:58:58,664 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 01:58:58,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:58,708 INFO  L263         TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-01-11 01:58:58,711 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 01:58:58,888 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 01:58:58,889 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 01:58:58,945 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 01:58:58,945 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002242067] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 01:58:58,945 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 01:58:58,945 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8
[2022-01-11 01:58:58,945 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805954761]
[2022-01-11 01:58:58,946 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 01:58:58,946 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-11 01:58:58,946 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:58:58,946 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-11 01:58:58,947 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56
[2022-01-11 01:58:58,947 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 01:58:59,005 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:58:59,005 INFO  L93              Difference]: Finished difference Result 19 states and 21 transitions.
[2022-01-11 01:58:59,005 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-01-11 01:58:59,005 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) Word has length 8
[2022-01-11 01:58:59,006 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:58:59,006 INFO  L225             Difference]: With dead ends: 19
[2022-01-11 01:58:59,006 INFO  L226             Difference]: Without dead ends: 15
[2022-01-11 01:58:59,006 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72
[2022-01-11 01:58:59,007 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 01:58:59,007 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 01:58:59,008 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-11 01:58:59,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-11 01:58:59,010 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 01:58:59,011 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2022-01-11 01:58:59,011 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8
[2022-01-11 01:58:59,011 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:58:59,011 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2022-01-11 01:58:59,011 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 01:58:59,011 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2022-01-11 01:58:59,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2022-01-11 01:58:59,012 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:58:59,012 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1]
[2022-01-11 01:58:59,050 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 01:58:59,231 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:58:59,232 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:58:59,232 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:58:59,233 INFO  L85        PathProgramCache]: Analyzing trace with hash 20991918, now seen corresponding path program 2 times
[2022-01-11 01:58:59,233 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:58:59,233 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559088319]
[2022-01-11 01:58:59,233 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:58:59,233 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:58:59,284 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:58:59,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:58:59,397 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:58:59,398 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559088319]
[2022-01-11 01:58:59,398 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559088319] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 01:58:59,398 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831459846]
[2022-01-11 01:58:59,398 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-11 01:58:59,398 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:58:59,398 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:58:59,399 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 01:58:59,400 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 01:58:59,464 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-11 01:58:59,464 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 01:58:59,465 INFO  L263         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-11 01:58:59,466 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 01:59:03,733 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:59:03,733 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 01:59:04,122 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:59:04,122 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831459846] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 01:59:04,122 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 01:59:04,122 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17
[2022-01-11 01:59:04,123 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497220532]
[2022-01-11 01:59:04,123 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 01:59:04,123 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-01-11 01:59:04,123 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 01:59:04,124 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-01-11 01:59:04,124 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272
[2022-01-11 01:59:04,124 INFO  L87              Difference]: Start difference. First operand 15 states and 15 transitions. Second operand  has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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 01:59:07,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 01:59:07,823 INFO  L93              Difference]: Finished difference Result 27 states and 30 transitions.
[2022-01-11 01:59:07,824 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-01-11 01:59:07,824 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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 14
[2022-01-11 01:59:07,824 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 01:59:07,824 INFO  L225             Difference]: With dead ends: 27
[2022-01-11 01:59:07,824 INFO  L226             Difference]: Without dead ends: 23
[2022-01-11 01:59:07,825 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=143, Invalid=276, Unknown=1, NotChecked=0, Total=420
[2022-01-11 01:59:07,826 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-11 01:59:07,826 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time]
[2022-01-11 01:59:07,826 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2022-01-11 01:59:07,830 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2022-01-11 01:59:07,830 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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 01:59:07,831 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2022-01-11 01:59:07,831 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14
[2022-01-11 01:59:07,831 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 01:59:07,831 INFO  L470      AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2022-01-11 01:59:07,831 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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 01:59:07,832 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2022-01-11 01:59:07,832 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-01-11 01:59:07,832 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 01:59:07,832 INFO  L514         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1]
[2022-01-11 01:59:07,837 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-11 01:59:08,037 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2022-01-11 01:59:08,038 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 01:59:08,038 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 01:59:08,038 INFO  L85        PathProgramCache]: Analyzing trace with hash -1076613066, now seen corresponding path program 3 times
[2022-01-11 01:59:08,039 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 01:59:08,039 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091066693]
[2022-01-11 01:59:08,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 01:59:08,039 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 01:59:08,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 01:59:08,330 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 01:59:08,330 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 01:59:08,331 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091066693]
[2022-01-11 01:59:08,332 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091066693] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 01:59:08,335 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498769066]
[2022-01-11 01:59:08,336 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-11 01:59:08,336 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 01:59:08,336 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 01:59:08,337 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 01:59:08,338 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 01:59:08,572 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2022-01-11 01:59:08,573 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 01:59:08,575 INFO  L263         TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 36 conjunts are in the unsatisfiable core
[2022-01-11 01:59:08,576 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 02:00:12,064 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:00:12,065 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 02:00:12,659 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:00:12,660 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [498769066] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 02:00:12,660 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 02:00:12,660 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28
[2022-01-11 02:00:12,660 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679141602]
[2022-01-11 02:00:12,660 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 02:00:12,660 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-01-11 02:00:12,660 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 02:00:12,661 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-01-11 02:00:12,661 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=657, Unknown=22, NotChecked=0, Total=756
[2022-01-11 02:00:12,661 INFO  L87              Difference]: Start difference. First operand 23 states and 23 transitions. Second operand  has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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 02:00:12,748 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 02:00:12,749 INFO  L93              Difference]: Finished difference Result 29 states and 29 transitions.
[2022-01-11 02:00:12,749 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-01-11 02:00:12,749 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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 22
[2022-01-11 02:00:12,749 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 02:00:12,750 INFO  L225             Difference]: With dead ends: 29
[2022-01-11 02:00:12,750 INFO  L226             Difference]: Without dead ends: 25
[2022-01-11 02:00:12,750 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=82, Invalid=708, Unknown=22, NotChecked=0, Total=812
[2022-01-11 02:00:12,751 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-11 02:00:12,751 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 193 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time]
[2022-01-11 02:00:12,751 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2022-01-11 02:00:12,755 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2022-01-11 02:00:12,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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 02:00:12,755 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions.
[2022-01-11 02:00:12,756 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22
[2022-01-11 02:00:12,756 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 02:00:12,756 INFO  L470      AbstractCegarLoop]: Abstraction has 25 states and 25 transitions.
[2022-01-11 02:00:12,756 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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 02:00:12,756 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions.
[2022-01-11 02:00:12,756 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-01-11 02:00:12,756 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 02:00:12,756 INFO  L514         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1]
[2022-01-11 02:00:12,761 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2022-01-11 02:00:12,959 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:00:12,959 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 02:00:12,960 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 02:00:12,960 INFO  L85        PathProgramCache]: Analyzing trace with hash 491392792, now seen corresponding path program 4 times
[2022-01-11 02:00:12,960 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 02:00:12,960 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204061960]
[2022-01-11 02:00:12,960 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 02:00:12,961 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 02:00:13,045 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 02:00:13,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-11 02:00:13,293 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 02:00:13,294 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204061960]
[2022-01-11 02:00:13,294 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204061960] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 02:00:13,294 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968187812]
[2022-01-11 02:00:13,294 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-01-11 02:00:13,294 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 02:00:13,294 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 02:00:13,296 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-11 02:00:13,297 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-11 02:00:13,480 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-01-11 02:00:13,480 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 02:00:13,481 INFO  L263         TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core
[2022-01-11 02:00:13,483 INFO  L286         TraceCheckSpWp]: Computing forward predicates...