/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_LAZY.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_2.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 14:28:03,805 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 14:28:03,806 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 14:28:03,850 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 14:28:03,850 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 14:28:03,851 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 14:28:03,851 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 14:28:03,852 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 14:28:03,853 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 14:28:03,854 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-10 14:28:03,854 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-10 14:28:03,855 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 14:28:03,855 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 14:28:03,856 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 14:28:03,856 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 14:28:03,857 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 14:28:03,858 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 14:28:03,858 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 14:28:03,859 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 14:28:03,860 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 14:28:03,861 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 14:28:03,869 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 14:28:03,875 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 14:28:03,876 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 14:28:03,877 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 14:28:03,877 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 14:28:03,878 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 14:28:03,878 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 14:28:03,878 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 14:28:03,879 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 14:28:03,879 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 14:28:03,880 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 14:28:03,880 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 14:28:03,880 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 14:28:03,881 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 14:28:03,881 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 14:28:03,882 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 14:28:03,882 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 14:28:03,882 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 14:28:03,882 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 14:28:03,883 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 14:28:03,885 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf
[2022-01-10 14:28:03,908 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 14:28:03,909 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 14:28:03,909 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 14:28:03,909 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 14:28:03,910 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 14:28:03,910 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 14:28:03,910 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 14:28:03,910 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 14:28:03,911 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 14:28:03,911 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 14:28:03,911 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 14:28:03,912 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 14:28:03,912 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:28:03,913 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 14:28:03,913 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 14:28:03,914 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 14:28:03,915 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 14:28:03,915 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_LAZY
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 14:28:04,092 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 14:28:04,107 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 14:28:04,108 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 14:28:04,109 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 14:28:04,109 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 14:28:04,110 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i
[2022-01-10 14:28:04,160 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7a8cce3/8c159091ea454e2695ca8c5f2164c15c/FLAGe9838fa4d
[2022-01-10 14:28:04,508 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 14:28:04,509 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i
[2022-01-10 14:28:04,516 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7a8cce3/8c159091ea454e2695ca8c5f2164c15c/FLAGe9838fa4d
[2022-01-10 14:28:04,526 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7a8cce3/8c159091ea454e2695ca8c5f2164c15c
[2022-01-10 14:28:04,528 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 14:28:04,531 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 14:28:04,533 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 14:28:04,533 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 14:28:04,535 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 14:28:04,536 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,537 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b0f1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04, skipping insertion in model container
[2022-01-10 14:28:04,537 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,541 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 14:28:04,551 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 14:28:04,680 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904]
[2022-01-10 14:28:04,685 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:28:04,692 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 14:28:04,700 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904]
[2022-01-10 14:28:04,701 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:28:04,709 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 14:28:04,709 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04 WrapperNode
[2022-01-10 14:28:04,709 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 14:28:04,710 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 14:28:04,710 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 14:28:04,710 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 14:28:04,714 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,718 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,728 INFO  L137                Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25
[2022-01-10 14:28:04,728 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 14:28:04,729 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 14:28:04,729 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 14:28:04,729 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 14:28:04,733 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,733 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,736 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,736 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,738 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,740 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,741 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,742 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 14:28:04,742 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 14:28:04,742 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 14:28:04,742 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 14:28:04,743 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,747 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:28:04,755 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:28:04,767 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)
[2022-01-10 14:28:04,775 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
[2022-01-10 14:28:04,794 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 14:28:04,794 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 14:28:04,795 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 14:28:04,795 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 14:28:04,833 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 14:28:04,834 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 14:28:04,895 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 14:28:04,899 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 14:28:04,899 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 14:28:04,900 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:28:04 BoogieIcfgContainer
[2022-01-10 14:28:04,900 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 14:28:04,901 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 14:28:04,901 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 14:28:04,902 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 14:28:04,903 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:28:04" (1/1) ...
[2022-01-10 14:28:04,934 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:28:04 BasicIcfg
[2022-01-10 14:28:04,935 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 14:28:04,936 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 14:28:04,936 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 14:28:04,938 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 14:28:04,938 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:28:04" (1/4) ...
[2022-01-10 14:28:04,938 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be559e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:28:04, skipping insertion in model container
[2022-01-10 14:28:04,938 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:28:04" (2/4) ...
[2022-01-10 14:28:04,938 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be559e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:28:04, skipping insertion in model container
[2022-01-10 14:28:04,939 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:28:04" (3/4) ...
[2022-01-10 14:28:04,939 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be559e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:28:04, skipping insertion in model container
[2022-01-10 14:28:04,939 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:28:04" (4/4) ...
[2022-01-10 14:28:04,939 INFO  L111   eAbstractionObserver]: Analyzing ICFG count_by_2.iTransformedIcfg
[2022-01-10 14:28:04,942 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 14:28:04,942 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 14:28:04,970 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 14:28:04,975 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
[2022-01-10 14:28:04,975 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 14:28:04,983 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:04,985 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:28:04,985 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:28:04,986 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:28:04,986 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:28:04,989 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:28:04,989 INFO  L85        PathProgramCache]: Analyzing trace with hash 1805578951, now seen corresponding path program 1 times
[2022-01-10 14:28:04,994 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:28:04,994 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157605120]
[2022-01-10 14:28:04,994 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:28:04,995 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:28:05,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:28:05,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:05,112 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:28:05,112 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157605120]
[2022-01-10 14:28:05,112 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157605120] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:28:05,112 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:28:05,113 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 14:28:05,114 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064100396]
[2022-01-10 14:28:05,114 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:28:05,129 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 14:28:05,129 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:28:05,157 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 14:28:05,157 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 14:28:05,159 INFO  L87              Difference]: Start difference. First operand  has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:05,167 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:28:05,168 INFO  L93              Difference]: Finished difference Result 20 states and 22 transitions.
[2022-01-10 14:28:05,168 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 14:28:05,169 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2022-01-10 14:28:05,169 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:28:05,179 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 14:28:05,180 INFO  L226             Difference]: Without dead ends: 8
[2022-01-10 14:28:05,181 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 14:28:05,184 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:28:05,185 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:28:05,199 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2022-01-10 14:28:05,205 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2022-01-10 14:28:05,206 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:05,207 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2022-01-10 14:28:05,208 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6
[2022-01-10 14:28:05,208 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:28:05,208 INFO  L470      AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2022-01-10 14:28:05,209 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:05,209 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2022-01-10 14:28:05,209 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:28:05,209 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:28:05,209 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:28:05,209 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 14:28:05,209 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:28:05,210 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:28:05,210 INFO  L85        PathProgramCache]: Analyzing trace with hash 1805608742, now seen corresponding path program 1 times
[2022-01-10 14:28:05,210 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:28:05,210 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313427966]
[2022-01-10 14:28:05,210 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:28:05,210 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:28:05,227 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:28:05,270 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:05,270 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:28:05,271 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313427966]
[2022-01-10 14:28:05,271 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313427966] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:28:05,271 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:28:05,271 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 14:28:05,271 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588728194]
[2022-01-10 14:28:05,271 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:28:05,272 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 14:28:05,272 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:28:05,272 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 14:28:05,272 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 14:28:05,273 INFO  L87              Difference]: Start difference. First operand 8 states and 8 transitions. Second operand  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:05,282 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:28:05,283 INFO  L93              Difference]: Finished difference Result 14 states and 14 transitions.
[2022-01-10 14:28:05,283 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 14:28:05,283 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2022-01-10 14:28:05,283 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:28:05,283 INFO  L225             Difference]: With dead ends: 14
[2022-01-10 14:28:05,283 INFO  L226             Difference]: Without dead ends: 10
[2022-01-10 14:28:05,284 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 14:28:05,285 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:28:05,285 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:28:05,286 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2022-01-10 14:28:05,287 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2022-01-10 14:28:05,287 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:05,287 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2022-01-10 14:28:05,287 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6
[2022-01-10 14:28:05,288 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:28:05,288 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2022-01-10 14:28:05,288 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:05,288 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2022-01-10 14:28:05,288 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-10 14:28:05,288 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:28:05,288 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:28:05,288 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 14:28:05,288 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:28:05,289 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:28:05,289 INFO  L85        PathProgramCache]: Analyzing trace with hash 52644360, now seen corresponding path program 1 times
[2022-01-10 14:28:05,289 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:28:05,289 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197159278]
[2022-01-10 14:28:05,289 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:28:05,289 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:28:05,304 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:28:05,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:05,336 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:28:05,336 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197159278]
[2022-01-10 14:28:05,337 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197159278] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:28:05,337 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111137079]
[2022-01-10 14:28:05,337 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:28:05,337 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:28:05,337 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:28:05,338 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)
[2022-01-10 14:28:05,339 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 14:28:05,378 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:28:05,382 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-01-10 14:28:05,385 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:28:05,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:05,463 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:28:05,922 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:05,922 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [111137079] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:28:05,922 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:28:05,923 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9
[2022-01-10 14:28:05,923 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559760257]
[2022-01-10 14:28:05,923 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:28:05,923 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-01-10 14:28:05,923 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:28:05,924 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-01-10 14:28:05,924 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2022-01-10 14:28:05,924 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:06,079 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:28:06,079 INFO  L93              Difference]: Finished difference Result 21 states and 23 transitions.
[2022-01-10 14:28:06,080 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-01-10 14:28:06,080 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2022-01-10 14:28:06,080 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:28:06,080 INFO  L225             Difference]: With dead ends: 21
[2022-01-10 14:28:06,080 INFO  L226             Difference]: Without dead ends: 15
[2022-01-10 14:28:06,081 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110
[2022-01-10 14:28:06,082 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:28:06,082 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:28:06,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-10 14:28:06,085 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-10 14:28:06,085 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:06,085 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2022-01-10 14:28:06,085 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8
[2022-01-10 14:28:06,086 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:28:06,086 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2022-01-10 14:28:06,086 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:06,086 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2022-01-10 14:28:06,086 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2022-01-10 14:28:06,086 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:28:06,086 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:28:06,105 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-01-10 14:28:06,303 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
[2022-01-10 14:28:06,304 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:28:06,304 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:28:06,304 INFO  L85        PathProgramCache]: Analyzing trace with hash 20991918, now seen corresponding path program 2 times
[2022-01-10 14:28:06,304 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:28:06,305 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088619300]
[2022-01-10 14:28:06,305 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:28:06,305 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:28:06,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:28:06,426 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:06,427 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:28:06,427 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088619300]
[2022-01-10 14:28:06,427 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088619300] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:28:06,429 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172402767]
[2022-01-10 14:28:06,429 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 14:28:06,429 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:28:06,429 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:28:06,430 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)
[2022-01-10 14:28:06,431 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 14:28:06,477 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 14:28:06,477 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:28:06,478 INFO  L263         TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core
[2022-01-10 14:28:06,479 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:28:15,449 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:15,449 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:28:21,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:28:21,001 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [172402767] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:28:21,002 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:28:21,002 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 18
[2022-01-10 14:28:21,002 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316123306]
[2022-01-10 14:28:21,002 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:28:21,002 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-01-10 14:28:21,002 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:28:21,003 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-01-10 14:28:21,003 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=218, Unknown=5, NotChecked=0, Total=306
[2022-01-10 14:28:21,003 INFO  L87              Difference]: Start difference. First operand 15 states and 15 transitions. Second operand  has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:28:42,544 WARN  L228               SmtUtils]: Spent 20.85s on a formula simplification. DAG size of input: 44 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 14:29:06,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:29:06,251 INFO  L93              Difference]: Finished difference Result 31 states and 35 transitions.
[2022-01-10 14:29:06,251 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2022-01-10 14:29:06,251 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14
[2022-01-10 14:29:06,252 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:29:06,252 INFO  L225             Difference]: With dead ends: 31
[2022-01-10 14:29:06,252 INFO  L226             Difference]: Without dead ends: 25
[2022-01-10 14:29:06,252 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=173, Invalid=419, Unknown=8, NotChecked=0, Total=600
[2022-01-10 14:29:06,253 INFO  L933         BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-01-10 14:29:06,253 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 10 Unchecked, 0.3s Time]
[2022-01-10 14:29:06,254 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2022-01-10 14:29:06,257 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2022-01-10 14:29:06,257 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:29:06,258 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions.
[2022-01-10 14:29:06,258 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 14
[2022-01-10 14:29:06,258 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:29:06,258 INFO  L470      AbstractCegarLoop]: Abstraction has 25 states and 25 transitions.
[2022-01-10 14:29:06,258 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 14:29:06,258 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions.
[2022-01-10 14:29:06,259 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2022-01-10 14:29:06,259 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:29:06,259 INFO  L514         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:29:06,277 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 14:29:06,459 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2022-01-10 14:29:06,459 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:29:06,460 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:29:06,460 INFO  L85        PathProgramCache]: Analyzing trace with hash 491392792, now seen corresponding path program 3 times
[2022-01-10 14:29:06,460 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:29:06,460 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698843910]
[2022-01-10 14:29:06,460 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:29:06,460 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:29:06,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:29:06,625 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:29:06,626 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:29:06,626 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698843910]
[2022-01-10 14:29:06,626 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698843910] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:29:06,626 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829964824]
[2022-01-10 14:29:06,626 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 14:29:06,626 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:29:06,626 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:29:06,629 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)
[2022-01-10 14:29:06,631 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 14:29:07,025 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s)
[2022-01-10 14:29:07,025 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:29:07,027 INFO  L263         TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 42 conjunts are in the unsatisfiable core
[2022-01-10 14:29:07,028 INFO  L286         TraceCheckSpWp]: Computing forward predicates...