/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-simple/id_o20.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-11 00:14:15,788 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-11 00:14:15,789 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-11 00:14:15,841 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-11 00:14:15,842 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-11 00:14:15,843 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-11 00:14:15,844 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-11 00:14:15,845 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-11 00:14:15,846 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-11 00:14:15,848 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-11 00:14:15,849 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-11 00:14:15,850 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-11 00:14:15,850 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-11 00:14:15,851 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-11 00:14:15,852 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-11 00:14:15,853 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-11 00:14:15,853 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-11 00:14:15,854 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-11 00:14:15,856 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-11 00:14:15,857 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-11 00:14:15,858 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-11 00:14:15,858 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-11 00:14:15,859 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-11 00:14:15,861 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-11 00:14:15,861 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-11 00:14:15,861 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-11 00:14:15,862 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-11 00:14:15,862 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-11 00:14:15,863 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-11 00:14:15,863 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-11 00:14:15,864 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-11 00:14:15,864 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-11 00:14:15,865 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-11 00:14:15,866 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-11 00:14:15,866 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-11 00:14:15,866 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-11 00:14:15,866 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-11 00:14:15,867 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-11 00:14:15,867 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-11 00:14:15,868 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-11 00:14:15,869 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 00:14:15,885 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-11 00:14:15,885 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-11 00:14:15,885 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-11 00:14:15,886 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-11 00:14:15,886 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-11 00:14:15,887 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-11 00:14:15,887 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-11 00:14:15,887 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-11 00:14:15,887 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-11 00:14:15,887 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-11 00:14:15,888 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-11 00:14:15,889 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-11 00:14:15,889 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-11 00:14:15,889 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-11 00:14:15,889 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 00:14:15,889 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-11 00:14:15,889 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-11 00:14:15,889 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-11 00:14:15,889 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-11 00:14:15,890 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-11 00:14:15,890 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-11 00:14:15,890 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-11 00:14:15,890 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-11 00:14:15,890 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-11 00:14:15,890 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-11 00:14:15,891 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-11 00:14:15,891 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-11 00:14:16,070 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-11 00:14:16,089 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-11 00:14:16,090 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-11 00:14:16,091 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-11 00:14:16,091 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-11 00:14:16,092 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c
[2022-01-11 00:14:16,147 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f86b833/fbc7c85658c94db1bbddbec8733ac364/FLAG96ed72016
[2022-01-11 00:14:16,434 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-11 00:14:16,435 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o20.c
[2022-01-11 00:14:16,443 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f86b833/fbc7c85658c94db1bbddbec8733ac364/FLAG96ed72016
[2022-01-11 00:14:16,857 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f86b833/fbc7c85658c94db1bbddbec8733ac364
[2022-01-11 00:14:16,859 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-11 00:14:16,860 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-11 00:14:16,861 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-11 00:14:16,862 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-11 00:14:16,864 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-11 00:14:16,865 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:14:16" (1/1) ...
[2022-01-11 00:14:16,866 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54963019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:16, skipping insertion in model container
[2022-01-11 00:14:16,866 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:14:16" (1/1) ...
[2022-01-11 00:14:16,871 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-11 00:14:16,882 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-11 00:14:16,971 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-simple/id_o20.c[516,529]
[2022-01-11 00:14:16,972 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 00:14:16,997 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-11 00:14:17,024 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-simple/id_o20.c[516,529]
[2022-01-11 00:14:17,025 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-11 00:14:17,035 INFO  L208         MainTranslator]: Completed translation
[2022-01-11 00:14:17,035 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17 WrapperNode
[2022-01-11 00:14:17,035 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-11 00:14:17,036 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-11 00:14:17,036 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-11 00:14:17,036 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-11 00:14:17,041 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,046 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,055 INFO  L137                Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19
[2022-01-11 00:14:17,055 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-11 00:14:17,056 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-11 00:14:17,056 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-11 00:14:17,056 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-11 00:14:17,062 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,062 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,063 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,063 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,066 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,067 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,068 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,069 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-11 00:14:17,069 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-11 00:14:17,070 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-11 00:14:17,070 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-11 00:14:17,070 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,076 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-11 00:14:17,083 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 00:14:17,092 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 00:14:17,093 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 00:14:17,116 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-11 00:14:17,116 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-11 00:14:17,116 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-11 00:14:17,116 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-11 00:14:17,116 INFO  L130     BoogieDeclarations]: Found specification of procedure id
[2022-01-11 00:14:17,116 INFO  L138     BoogieDeclarations]: Found implementation of procedure id
[2022-01-11 00:14:17,162 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-11 00:14:17,163 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-11 00:14:17,225 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-11 00:14:17,229 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-11 00:14:17,230 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2022-01-11 00:14:17,231 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:14:17 BoogieIcfgContainer
[2022-01-11 00:14:17,231 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-11 00:14:17,232 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-11 00:14:17,232 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-11 00:14:17,233 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-11 00:14:17,235 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:14:17" (1/1) ...
[2022-01-11 00:14:17,277 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:14:17 BasicIcfg
[2022-01-11 00:14:17,277 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-11 00:14:17,278 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-11 00:14:17,278 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-11 00:14:17,281 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-11 00:14:17,281 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:14:16" (1/4) ...
[2022-01-11 00:14:17,281 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b751e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:14:17, skipping insertion in model container
[2022-01-11 00:14:17,281 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:17" (2/4) ...
[2022-01-11 00:14:17,282 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b751e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:14:17, skipping insertion in model container
[2022-01-11 00:14:17,282 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:14:17" (3/4) ...
[2022-01-11 00:14:17,282 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b751e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:14:17, skipping insertion in model container
[2022-01-11 00:14:17,282 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:14:17" (4/4) ...
[2022-01-11 00:14:17,283 INFO  L111   eAbstractionObserver]: Analyzing ICFG id_o20.cTransformedIcfg
[2022-01-11 00:14:17,287 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-11 00:14:17,287 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-11 00:14:17,319 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-11 00:14:17,324 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 00:14:17,324 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-11 00:14:17,335 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-11 00:14:17,339 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-11 00:14:17,339 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:14:17,339 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:14:17,339 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:14:17,343 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:14:17,343 INFO  L85        PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times
[2022-01-11 00:14:17,349 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:14:17,349 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92746107]
[2022-01-11 00:14:17,350 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:14:17,350 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:14:17,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:17,571 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:17,578 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:17,613 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 00:14:17,614 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:14:17,614 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92746107]
[2022-01-11 00:14:17,615 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92746107] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-11 00:14:17,615 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-11 00:14:17,615 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-11 00:14:17,616 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19891966]
[2022-01-11 00:14:17,617 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-11 00:14:17,620 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-11 00:14:17,620 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 00:14:17,647 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-11 00:14:17,649 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-11 00:14:17,650 INFO  L87              Difference]: Start difference. First operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 00:14:17,696 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 00:14:17,697 INFO  L93              Difference]: Finished difference Result 28 states and 30 transitions.
[2022-01-11 00:14:17,698 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-01-11 00:14:17,699 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10
[2022-01-11 00:14:17,699 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 00:14:17,706 INFO  L225             Difference]: With dead ends: 28
[2022-01-11 00:14:17,706 INFO  L226             Difference]: Without dead ends: 15
[2022-01-11 00:14:17,709 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-11 00:14:17,713 INFO  L933         BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 00:14:17,714 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 00:14:17,740 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-11 00:14:17,758 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-11 00:14:17,759 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-11 00:14:17,760 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2022-01-11 00:14:17,761 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10
[2022-01-11 00:14:17,761 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 00:14:17,762 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2022-01-11 00:14:17,762 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 00:14:17,763 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2022-01-11 00:14:17,765 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2022-01-11 00:14:17,765 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:14:17,765 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:14:17,766 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-11 00:14:17,766 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:14:17,766 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:14:17,767 INFO  L85        PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times
[2022-01-11 00:14:17,767 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:14:17,767 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137518063]
[2022-01-11 00:14:17,768 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:14:17,768 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:14:17,827 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:17,913 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:17,938 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:17,997 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:18,013 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:18,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-11 00:14:18,038 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:14:18,038 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137518063]
[2022-01-11 00:14:18,039 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137518063] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 00:14:18,039 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188826002]
[2022-01-11 00:14:18,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:14:18,040 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 00:14:18,040 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 00:14:18,042 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 00:14:18,043 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 00:14:18,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:18,114 INFO  L263         TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-01-11 00:14:18,118 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 00:14:18,366 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-11 00:14:18,366 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 00:14:18,567 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-01-11 00:14:18,571 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188826002] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 00:14:18,571 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 00:14:18,572 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17
[2022-01-11 00:14:18,572 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388778617]
[2022-01-11 00:14:18,573 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 00:14:18,573 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2022-01-11 00:14:18,573 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 00:14:18,574 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2022-01-11 00:14:18,576 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272
[2022-01-11 00:14:18,577 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6)
[2022-01-11 00:14:18,627 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 00:14:18,627 INFO  L93              Difference]: Finished difference Result 27 states and 29 transitions.
[2022-01-11 00:14:18,627 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-11 00:14:18,627 INFO  L78                 Accepts]: Start accepts. Automaton has  has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 16
[2022-01-11 00:14:18,628 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 00:14:18,628 INFO  L225             Difference]: With dead ends: 27
[2022-01-11 00:14:18,628 INFO  L226             Difference]: Without dead ends: 21
[2022-01-11 00:14:18,629 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272
[2022-01-11 00:14:18,630 INFO  L933         BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 00:14:18,630 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-11 00:14:18,631 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-01-11 00:14:18,634 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2022-01-11 00:14:18,634 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5)
[2022-01-11 00:14:18,635 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2022-01-11 00:14:18,635 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16
[2022-01-11 00:14:18,636 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 00:14:18,636 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2022-01-11 00:14:18,636 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6)
[2022-01-11 00:14:18,637 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2022-01-11 00:14:18,638 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-01-11 00:14:18,638 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:14:18,638 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:14:18,664 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 00:14:18,859 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 00:14:18,860 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:14:18,860 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:14:18,861 INFO  L85        PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 2 times
[2022-01-11 00:14:18,861 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:14:18,861 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502196131]
[2022-01-11 00:14:18,861 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:14:18,861 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:14:18,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:18,961 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:18,992 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:19,028 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:19,038 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:19,083 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:19,089 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:19,124 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:19,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:19,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-01-11 00:14:19,143 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:14:19,143 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502196131]
[2022-01-11 00:14:19,145 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502196131] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 00:14:19,145 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017676099]
[2022-01-11 00:14:19,145 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-11 00:14:19,147 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 00:14:19,148 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 00:14:19,149 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 00:14:19,150 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 00:14:19,201 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-11 00:14:19,202 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 00:14:19,203 INFO  L263         TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core
[2022-01-11 00:14:19,210 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-11 00:14:20,283 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-01-11 00:14:20,284 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-11 00:14:20,810 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-01-11 00:14:20,811 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017676099] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-11 00:14:20,811 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-11 00:14:20,811 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28
[2022-01-11 00:14:20,811 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968140741]
[2022-01-11 00:14:20,811 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-11 00:14:20,812 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 28 states
[2022-01-11 00:14:20,812 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-11 00:14:20,812 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2022-01-11 00:14:20,813 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756
[2022-01-11 00:14:20,813 INFO  L87              Difference]: Start difference. First operand 21 states and 22 transitions. Second operand  has 28 states, 28 states have (on average 1.25) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12)
[2022-01-11 00:14:20,959 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-11 00:14:20,960 INFO  L93              Difference]: Finished difference Result 39 states and 43 transitions.
[2022-01-11 00:14:20,960 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2022-01-11 00:14:20,960 INFO  L78                 Accepts]: Start accepts. Automaton has  has 28 states, 28 states have (on average 1.25) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12) Word has length 28
[2022-01-11 00:14:20,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-11 00:14:20,961 INFO  L225             Difference]: With dead ends: 39
[2022-01-11 00:14:20,961 INFO  L226             Difference]: Without dead ends: 33
[2022-01-11 00:14:20,962 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992
[2022-01-11 00:14:20,963 INFO  L933         BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-11 00:14:20,963 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time]
[2022-01-11 00:14:20,964 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2022-01-11 00:14:20,968 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2022-01-11 00:14:20,968 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9)
[2022-01-11 00:14:20,969 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions.
[2022-01-11 00:14:20,969 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28
[2022-01-11 00:14:20,969 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-11 00:14:20,969 INFO  L470      AbstractCegarLoop]: Abstraction has 33 states and 34 transitions.
[2022-01-11 00:14:20,970 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 28 states, 28 states have (on average 1.25) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12)
[2022-01-11 00:14:20,970 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions.
[2022-01-11 00:14:20,971 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2022-01-11 00:14:20,971 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-11 00:14:20,971 INFO  L514         BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-11 00:14:20,996 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 00:14:21,193 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,SelfDestructingSolverStorable2
[2022-01-11 00:14:21,193 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-11 00:14:21,194 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-11 00:14:21,194 INFO  L85        PathProgramCache]: Analyzing trace with hash -1798148635, now seen corresponding path program 3 times
[2022-01-11 00:14:21,194 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-11 00:14:21,194 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015695096]
[2022-01-11 00:14:21,194 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-11 00:14:21,194 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-11 00:14:21,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,284 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,313 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,353 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,370 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,409 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,427 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,468 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,530 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,541 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,588 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,661 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,666 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,708 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2022-01-11 00:14:21,711 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,731 INFO  L134       CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked.
[2022-01-11 00:14:21,731 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-11 00:14:21,732 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015695096]
[2022-01-11 00:14:21,732 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015695096] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-11 00:14:21,732 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715660625]
[2022-01-11 00:14:21,732 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-11 00:14:21,732 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-11 00:14:21,732 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-11 00:14:21,733 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 00:14:21,761 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 00:14:21,873 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2022-01-11 00:14:21,874 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-11 00:14:21,875 INFO  L263         TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 36 conjunts are in the unsatisfiable core
[2022-01-11 00:14:21,878 INFO  L286         TraceCheckSpWp]: Computing forward predicates...