/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_NONE.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci03.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-11 00:09:27,010 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-11 00:09:27,012 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-11 00:09:27,063 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-11 00:09:27,064 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-11 00:09:27,066 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-11 00:09:27,068 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-11 00:09:27,070 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-11 00:09:27,072 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-11 00:09:27,075 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-11 00:09:27,077 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-11 00:09:27,077 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-11 00:09:27,078 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-11 00:09:27,079 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-11 00:09:27,082 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-11 00:09:27,082 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-11 00:09:27,083 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-11 00:09:27,084 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-11 00:09:27,088 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-11 00:09:27,089 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-11 00:09:27,090 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-11 00:09:27,091 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-11 00:09:27,092 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-11 00:09:27,096 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-11 00:09:27,097 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-11 00:09:27,097 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-11 00:09:27,098 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-11 00:09:27,099 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-11 00:09:27,099 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-11 00:09:27,099 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-11 00:09:27,100 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-11 00:09:27,101 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-11 00:09:27,101 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-11 00:09:27,103 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-11 00:09:27,103 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-11 00:09:27,103 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-11 00:09:27,103 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-11 00:09:27,103 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-11 00:09:27,104 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-11 00:09:27,104 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-11 00:09:27,105 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf
[2022-01-11 00:09:27,130 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-11 00:09:27,130 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-11 00:09:27,131 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-11 00:09:27,131 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-11 00:09:27,132 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-11 00:09:27,132 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-11 00:09:27,132 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-11 00:09:27,132 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-11 00:09:27,132 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-11 00:09:27,132 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-11 00:09:27,133 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-11 00:09:27,133 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-11 00:09:27,133 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-11 00:09:27,133 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-11 00:09:27,133 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-11 00:09:27,133 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-11 00:09:27,134 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-11 00:09:27,134 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-11 00:09:27,134 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-11 00:09:27,134 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-11 00:09:27,134 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-11 00:09:27,134 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 00:09:27,134 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-11 00:09:27,134 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-11 00:09:27,135 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-11 00:09:27,135 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-11 00:09:27,135 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-11 00:09:27,136 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-11 00:09:27,136 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-11 00:09:27,136 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-11 00:09:27,136 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-11 00:09:27,136 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-11 00:09:27,137 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-11 00:09:27,137 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_NONE
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-11 00:09:27,317 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-11 00:09:27,335 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-11 00:09:27,337 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-11 00:09:27,338 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-11 00:09:27,338 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-11 00:09:27,339 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c
[2022-01-11 00:09:27,381 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1dd367d6/93974800546340e586c7fd59c040b9a2/FLAGacc0fce21
[2022-01-11 00:09:27,761 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-11 00:09:27,761 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c
[2022-01-11 00:09:27,767 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1dd367d6/93974800546340e586c7fd59c040b9a2/FLAGacc0fce21
[2022-01-11 00:09:27,776 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1dd367d6/93974800546340e586c7fd59c040b9a2
[2022-01-11 00:09:27,778 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-11 00:09:27,779 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-11 00:09:27,780 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-11 00:09:27,780 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-11 00:09:27,782 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-11 00:09:27,782 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:27,783 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65718c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27, skipping insertion in model container
[2022-01-11 00:09:27,783 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:27,787 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-11 00:09:27,795 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-11 00:09:27,923 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c[788,801]
[2022-01-11 00:09:27,925 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 00:09:27,933 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-11 00:09:27,943 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c[788,801]
[2022-01-11 00:09:27,944 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 00:09:27,952 INFO  L208         MainTranslator]: Completed translation
[2022-01-11 00:09:27,953 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27 WrapperNode
[2022-01-11 00:09:27,953 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-11 00:09:27,954 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-11 00:09:27,954 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-11 00:09:27,954 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-11 00:09:27,959 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:27,967 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:27,981 INFO  L137                Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24
[2022-01-11 00:09:27,982 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-11 00:09:27,983 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-11 00:09:27,983 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-11 00:09:27,983 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-11 00:09:27,988 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:27,988 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:27,992 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:27,992 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:28,001 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:28,002 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:28,003 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:28,004 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-11 00:09:28,005 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-11 00:09:28,005 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-11 00:09:28,005 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-11 00:09:28,005 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (1/1) ...
[2022-01-11 00:09:28,026 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 00:09:28,037 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 00:09:28,049 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 00:09:28,060 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 00:09:28,078 INFO  L130     BoogieDeclarations]: Found specification of procedure fibonacci
[2022-01-11 00:09:28,078 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibonacci
[2022-01-11 00:09:28,078 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-11 00:09:28,079 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-11 00:09:28,079 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-11 00:09:28,079 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-11 00:09:28,133 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-11 00:09:28,134 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-11 00:09:28,202 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-11 00:09:28,216 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-11 00:09:28,217 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2022-01-11 00:09:28,218 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:09:28 BoogieIcfgContainer
[2022-01-11 00:09:28,218 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-11 00:09:28,219 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-11 00:09:28,219 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-11 00:09:28,220 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-11 00:09:28,222 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:09:28" (1/1) ...
[2022-01-11 00:09:28,320 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:09:28 BasicIcfg
[2022-01-11 00:09:28,320 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-11 00:09:28,321 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-11 00:09:28,321 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-11 00:09:28,323 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-11 00:09:28,323 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:09:27" (1/4) ...
[2022-01-11 00:09:28,324 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759d5f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:09:28, skipping insertion in model container
[2022-01-11 00:09:28,324 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:27" (2/4) ...
[2022-01-11 00:09:28,324 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759d5f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:09:28, skipping insertion in model container
[2022-01-11 00:09:28,324 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:09:28" (3/4) ...
[2022-01-11 00:09:28,324 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759d5f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:09:28, skipping insertion in model container
[2022-01-11 00:09:28,324 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:09:28" (4/4) ...
[2022-01-11 00:09:28,325 INFO  L111   eAbstractionObserver]: Analyzing ICFG Fibonacci03.cTransformedIcfg
[2022-01-11 00:09:28,328 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-11 00:09:28,328 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-11 00:09:28,357 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-11 00:09:28,369 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 00:09:28,369 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-11 00:09:28,383 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-01-11 00:09:28,386 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-01-11 00:09:28,386 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:09:28,387 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:09:28,387 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:09:28,394 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:09:28,395 INFO  L85        PathProgramCache]: Analyzing trace with hash -627383165, now seen corresponding path program 1 times
[2022-01-11 00:09:28,404 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:09:28,405 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302124380]
[2022-01-11 00:09:28,405 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:09:28,405 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:09:28,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:28,602 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:28,613 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:28,660 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 00:09:28,660 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:09:28,661 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302124380]
[2022-01-11 00:09:28,661 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302124380] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 00:09:28,661 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 00:09:28,661 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-11 00:09:28,663 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951255239]
[2022-01-11 00:09:28,663 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 00:09:28,666 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-11 00:09:28,666 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 00:09:28,682 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-11 00:09:28,682 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-11 00:09:28,684 INFO  L87              Difference]: Start difference. First operand  has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-11 00:09:28,761 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 00:09:28,762 INFO  L93              Difference]: Finished difference Result 31 states and 37 transitions.
[2022-01-11 00:09:28,763 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-11 00:09:28,764 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-01-11 00:09:28,764 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 00:09:28,769 INFO  L225             Difference]: With dead ends: 31
[2022-01-11 00:09:28,769 INFO  L226             Difference]: Without dead ends: 18
[2022-01-11 00:09:28,771 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-11 00:09:28,774 INFO  L933         BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-11 00:09:28,774 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 50 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-11 00:09:28,785 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2022-01-11 00:09:28,797 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2022-01-11 00:09:28,798 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2022-01-11 00:09:28,799 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions.
[2022-01-11 00:09:28,800 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11
[2022-01-11 00:09:28,800 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 00:09:28,800 INFO  L470      AbstractCegarLoop]: Abstraction has 18 states and 22 transitions.
[2022-01-11 00:09:28,800 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-11 00:09:28,800 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions.
[2022-01-11 00:09:28,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-11 00:09:28,801 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:09:28,801 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:09:28,802 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-11 00:09:28,802 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:09:28,803 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:09:28,803 INFO  L85        PathProgramCache]: Analyzing trace with hash -1359790534, now seen corresponding path program 1 times
[2022-01-11 00:09:28,803 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:09:28,803 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713625337]
[2022-01-11 00:09:28,803 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:09:28,803 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:09:28,821 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:28,863 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:28,869 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:28,885 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 00:09:28,886 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:09:28,886 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713625337]
[2022-01-11 00:09:28,886 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713625337] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 00:09:28,886 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 00:09:28,886 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-01-11 00:09:28,887 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698793512]
[2022-01-11 00:09:28,887 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 00:09:28,888 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-11 00:09:28,888 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 00:09:28,888 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-11 00:09:28,888 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2022-01-11 00:09:28,889 INFO  L87              Difference]: Start difference. First operand 18 states and 22 transitions. Second operand  has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-11 00:09:28,940 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 00:09:28,940 INFO  L93              Difference]: Finished difference Result 24 states and 29 transitions.
[2022-01-11 00:09:28,941 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-11 00:09:28,941 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-01-11 00:09:28,941 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 00:09:28,942 INFO  L225             Difference]: With dead ends: 24
[2022-01-11 00:09:28,942 INFO  L226             Difference]: Without dead ends: 20
[2022-01-11 00:09:28,942 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2022-01-11 00:09:28,943 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 00:09:28,944 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 00:09:28,944 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2022-01-11 00:09:28,947 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18.
[2022-01-11 00:09:28,948 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2022-01-11 00:09:28,948 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions.
[2022-01-11 00:09:28,948 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12
[2022-01-11 00:09:28,949 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 00:09:28,949 INFO  L470      AbstractCegarLoop]: Abstraction has 18 states and 22 transitions.
[2022-01-11 00:09:28,949 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-11 00:09:28,949 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions.
[2022-01-11 00:09:28,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-01-11 00:09:28,950 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:09:28,950 INFO  L514         BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:09:28,950 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-11 00:09:28,950 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:09:28,951 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:09:28,951 INFO  L85        PathProgramCache]: Analyzing trace with hash -1588078463, now seen corresponding path program 1 times
[2022-01-11 00:09:28,951 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:09:28,951 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101179528]
[2022-01-11 00:09:28,951 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:09:28,952 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:09:28,976 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:29,009 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:29,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:29,295 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:29,303 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:29,360 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2022-01-11 00:09:29,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:29,471 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-11 00:09:29,471 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:09:29,471 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101179528]
[2022-01-11 00:09:29,471 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101179528] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 00:09:29,472 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349299410]
[2022-01-11 00:09:29,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:09:29,472 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 00:09:29,472 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 00:09:29,474 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 00:09:29,475 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 00:09:29,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:29,544 INFO  L263         TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-01-11 00:09:29,548 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 00:09:29,956 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-11 00:09:29,956 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 00:09:30,322 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-11 00:09:30,322 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [349299410] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 00:09:30,323 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 00:09:30,323 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19
[2022-01-11 00:09:30,325 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643181402]
[2022-01-11 00:09:30,325 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 00:09:30,327 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2022-01-11 00:09:30,327 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 00:09:30,327 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2022-01-11 00:09:30,328 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342
[2022-01-11 00:09:30,329 INFO  L87              Difference]: Start difference. First operand 18 states and 22 transitions. Second operand  has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9)
[2022-01-11 00:09:31,052 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 00:09:31,053 INFO  L93              Difference]: Finished difference Result 54 states and 84 transitions.
[2022-01-11 00:09:31,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2022-01-11 00:09:31,053 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 23
[2022-01-11 00:09:31,054 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 00:09:31,054 INFO  L225             Difference]: With dead ends: 54
[2022-01-11 00:09:31,055 INFO  L226             Difference]: Without dead ends: 36
[2022-01-11 00:09:31,055 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756
[2022-01-11 00:09:31,056 INFO  L933         BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-01-11 00:09:31,056 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 72 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-01-11 00:09:31,057 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2022-01-11 00:09:31,062 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34.
[2022-01-11 00:09:31,062 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16)
[2022-01-11 00:09:31,063 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions.
[2022-01-11 00:09:31,064 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 23
[2022-01-11 00:09:31,064 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 00:09:31,064 INFO  L470      AbstractCegarLoop]: Abstraction has 34 states and 48 transitions.
[2022-01-11 00:09:31,065 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9)
[2022-01-11 00:09:31,065 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions.
[2022-01-11 00:09:31,066 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2022-01-11 00:09:31,066 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:09:31,066 INFO  L514         BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:09:31,073 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 00:09:31,271 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 00:09:31,271 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:09:31,272 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:09:31,272 INFO  L85        PathProgramCache]: Analyzing trace with hash -1006382026, now seen corresponding path program 1 times
[2022-01-11 00:09:31,272 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:09:31,272 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601762837]
[2022-01-11 00:09:31,272 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:09:31,273 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:09:31,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,382 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:31,426 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,476 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:31,483 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,520 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:31,525 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,543 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2022-01-11 00:09:31,545 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,549 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2022-01-11 00:09:31,561 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,570 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:31,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,581 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2022-01-11 00:09:31,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,586 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2022-01-11 00:09:31,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,591 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2022-01-11 00:09:31,592 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,596 INFO  L134       CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2022-01-11 00:09:31,597 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:09:31,597 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601762837]
[2022-01-11 00:09:31,597 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601762837] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 00:09:31,599 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771804106]
[2022-01-11 00:09:31,599 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:09:31,599 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 00:09:31,599 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 00:09:31,600 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 00:09:31,603 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 00:09:31,730 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:09:31,732 INFO  L263         TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 20 conjunts are in the unsatisfiable core
[2022-01-11 00:09:31,735 INFO  L286         TraceCheckSpWp]: Computing forward predicates...