/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/bitvector-loops/overflow_1-2.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 14:18:53,789 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 14:18:53,790 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 14:18:53,831 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 14:18:53,832 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 14:18:53,838 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 14:18:53,840 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 14:18:53,842 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-10 14:18:53,843 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 14:18:53,846 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-10 14:18:53,847 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-01-10 14:18:53,848 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 14:18:53,848 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 14:18:53,849 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 14:18:53,850 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 14:18:53,852 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 14:18:53,853 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 14:18:53,854 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 14:18:53,855 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 14:18:53,859 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 14:18:53,860 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 14:18:53,861 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 14:18:53,862 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 14:18:53,862 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 14:18:53,867 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 14:18:53,867 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 14:18:53,867 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 14:18:53,868 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 14:18:53,869 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 14:18:53,869 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 14:18:53,869 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 14:18:53,870 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 14:18:53,871 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 14:18:53,871 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 14:18:53,872 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 14:18:53,872 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 14:18:53,873 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 14:18:53,873 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 14:18:53,873 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-10 14:18:53,874 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-10 14:18:53,874 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 14:18:53,875 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 14:18:53,897 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 14:18:53,897 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 14:18:53,898 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 14:18:53,898 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 14:18:53,899 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 14:18:53,899 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 14:18:53,899 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 14:18:53,899 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 14:18:53,899 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 14:18:53,899 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 14:18:53,900 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 14:18:53,900 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 14:18:53,900 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 14:18:53,900 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 14:18:53,900 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 14:18:53,901 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 14:18:53,901 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 14:18:53,901 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 14:18:53,901 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 14:18:53,901 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 14:18:53,901 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 14:18:53,901 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:18:53,901 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 14:18:53,901 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 14:18:53,902 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 14:18:53,902 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 14:18:53,902 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 14:18:53,903 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 14:18:53,903 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 14:18:53,903 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 14:18:53,903 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 14:18:53,903 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 14:18:53,904 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 14:18:53,904 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 14:18:54,123 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 14:18:54,154 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 14:18:54,156 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 14:18:54,158 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 14:18:54,159 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 14:18:54,160 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/overflow_1-2.c
[2022-01-10 14:18:54,224 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ee7a69b3/a3fa27eb920e4cf1993a33e47f919c14/FLAGa33aa11f1
[2022-01-10 14:18:54,577 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 14:18:54,578 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c
[2022-01-10 14:18:54,585 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ee7a69b3/a3fa27eb920e4cf1993a33e47f919c14/FLAGa33aa11f1
[2022-01-10 14:18:54,595 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ee7a69b3/a3fa27eb920e4cf1993a33e47f919c14
[2022-01-10 14:18:54,597 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 14:18:54,598 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 14:18:54,601 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 14:18:54,601 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 14:18:54,603 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 14:18:54,604 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,604 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b136f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54, skipping insertion in model container
[2022-01-10 14:18:54,604 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,609 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 14:18:54,616 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 14:18:54,751 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c[324,337]
[2022-01-10 14:18:54,758 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:18:54,766 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 14:18:54,775 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c[324,337]
[2022-01-10 14:18:54,777 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 14:18:54,787 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 14:18:54,787 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54 WrapperNode
[2022-01-10 14:18:54,787 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 14:18:54,788 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 14:18:54,788 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 14:18:54,788 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 14:18:54,792 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,798 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,809 INFO  L137                Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23
[2022-01-10 14:18:54,809 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 14:18:54,810 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 14:18:54,810 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 14:18:54,810 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 14:18:54,814 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,815 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,817 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,817 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,820 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,824 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,827 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,829 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 14:18:54,829 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 14:18:54,829 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 14:18:54,830 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 14:18:54,831 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (1/1) ...
[2022-01-10 14:18:54,835 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 14:18:54,843 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:18:54,852 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 14:18:54,869 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 14:18:54,885 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 14:18:54,887 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 14:18:54,887 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 14:18:54,888 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 14:18:54,928 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 14:18:54,929 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 14:18:55,019 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 14:18:55,023 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 14:18:55,024 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 14:18:55,025 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:18:55 BoogieIcfgContainer
[2022-01-10 14:18:55,025 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 14:18:55,026 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 14:18:55,026 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 14:18:55,026 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 14:18:55,029 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:18:55" (1/1) ...
[2022-01-10 14:18:55,104 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:18:55 BasicIcfg
[2022-01-10 14:18:55,105 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 14:18:55,106 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 14:18:55,106 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 14:18:55,108 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 14:18:55,108 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:18:54" (1/4) ...
[2022-01-10 14:18:55,109 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e5d361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:18:55, skipping insertion in model container
[2022-01-10 14:18:55,109 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:18:54" (2/4) ...
[2022-01-10 14:18:55,109 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e5d361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:18:55, skipping insertion in model container
[2022-01-10 14:18:55,110 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:18:55" (3/4) ...
[2022-01-10 14:18:55,110 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e5d361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:18:55, skipping insertion in model container
[2022-01-10 14:18:55,110 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:18:55" (4/4) ...
[2022-01-10 14:18:55,110 INFO  L111   eAbstractionObserver]: Analyzing ICFG overflow_1-2.cTransformedIcfg
[2022-01-10 14:18:55,113 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 14:18:55,114 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 14:18:55,160 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 14:18:55,166 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 14:18:55,166 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 14:18:55,175 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 14:18:55,178 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:18:55,179 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:18:55,179 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:18:55,179 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:18:55,184 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:18:55,184 INFO  L85        PathProgramCache]: Analyzing trace with hash 1775995463, now seen corresponding path program 1 times
[2022-01-10 14:18:55,190 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:18:55,190 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728882389]
[2022-01-10 14:18:55,191 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:18:55,191 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:18:55,267 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:18:55,330 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 14:18:55,330 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:18:55,330 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728882389]
[2022-01-10 14:18:55,331 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728882389] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:18:55,331 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:18:55,331 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 14:18:55,332 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695154694]
[2022-01-10 14:18:55,333 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:18:55,335 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 14:18:55,335 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:18:55,375 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 14:18:55,375 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 14:18:55,377 INFO  L87              Difference]: Start difference. First operand  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 14:18:55,385 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:18:55,385 INFO  L93              Difference]: Finished difference Result 19 states and 21 transitions.
[2022-01-10 14:18:55,389 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 14:18:55,390 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 14:18:55,390 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:18:55,394 INFO  L225             Difference]: With dead ends: 19
[2022-01-10 14:18:55,395 INFO  L226             Difference]: Without dead ends: 7
[2022-01-10 14:18:55,396 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 14:18:55,399 INFO  L933         BasicCegarLoop]: 11 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, 11 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 14:18:55,408 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:18:55,419 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7 states.
[2022-01-10 14:18:55,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7.
[2022-01-10 14:18:55,428 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 14:18:55,428 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions.
[2022-01-10 14:18:55,429 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 6
[2022-01-10 14:18:55,429 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:18:55,430 INFO  L470      AbstractCegarLoop]: Abstraction has 7 states and 7 transitions.
[2022-01-10 14:18:55,430 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 14:18:55,431 INFO  L276                IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions.
[2022-01-10 14:18:55,431 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2022-01-10 14:18:55,431 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:18:55,432 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2022-01-10 14:18:55,432 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 14:18:55,432 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:18:55,433 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:18:55,434 INFO  L85        PathProgramCache]: Analyzing trace with hash 1776025254, now seen corresponding path program 1 times
[2022-01-10 14:18:55,434 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:18:55,434 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949520389]
[2022-01-10 14:18:55,434 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:18:55,434 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:18:55,461 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:18:55,498 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 14:18:55,498 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:18:55,498 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949520389]
[2022-01-10 14:18:55,498 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949520389] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 14:18:55,498 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 14:18:55,498 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 14:18:55,499 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550697614]
[2022-01-10 14:18:55,499 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 14:18:55,500 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 14:18:55,501 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:18:55,501 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 14:18:55,502 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 14:18:55,502 INFO  L87              Difference]: Start difference. First operand 7 states and 7 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 14:18:55,512 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:18:55,512 INFO  L93              Difference]: Finished difference Result 12 states and 12 transitions.
[2022-01-10 14:18:55,512 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 14:18:55,512 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 14:18:55,513 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:18:55,513 INFO  L225             Difference]: With dead ends: 12
[2022-01-10 14:18:55,513 INFO  L226             Difference]: Without dead ends: 8
[2022-01-10 14:18:55,516 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 14:18:55,518 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:18:55,519 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:18:55,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2022-01-10 14:18:55,523 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2022-01-10 14:18:55,523 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 14:18:55,523 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2022-01-10 14:18:55,523 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6
[2022-01-10 14:18:55,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:18:55,524 INFO  L470      AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2022-01-10 14:18:55,524 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 14:18:55,524 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2022-01-10 14:18:55,525 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 14:18:55,525 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:18:55,525 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:18:55,528 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 14:18:55,528 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:18:55,531 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:18:55,531 INFO  L85        PathProgramCache]: Analyzing trace with hash -776929020, now seen corresponding path program 1 times
[2022-01-10 14:18:55,531 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:18:55,532 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258706204]
[2022-01-10 14:18:55,532 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:18:55,532 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:18:55,549 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:18:55,631 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 14:18:55,631 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:18:55,631 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258706204]
[2022-01-10 14:18:55,632 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258706204] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:18:55,632 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033293205]
[2022-01-10 14:18:55,632 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:18:55,632 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:18:55,632 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:18:55,634 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 14:18:55,634 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 14:18:55,674 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:18:55,676 INFO  L263         TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 14:18:55,680 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:18:55,710 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 14:18:55,711 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:18:55,779 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 14:18:55,779 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033293205] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:18:55,779 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:18:55,779 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8
[2022-01-10 14:18:55,779 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808770200]
[2022-01-10 14:18:55,779 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:18:55,780 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-10 14:18:55,780 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:18:55,780 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-10 14:18:55,780 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2022-01-10 14:18:55,780 INFO  L87              Difference]: Start difference. First operand 8 states and 8 transitions. Second operand  has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 14:18:55,816 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:18:55,816 INFO  L93              Difference]: Finished difference Result 15 states and 17 transitions.
[2022-01-10 14:18:55,816 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 14:18:55,816 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 7
[2022-01-10 14:18:55,817 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:18:55,817 INFO  L225             Difference]: With dead ends: 15
[2022-01-10 14:18:55,817 INFO  L226             Difference]: Without dead ends: 11
[2022-01-10 14:18:55,817 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72
[2022-01-10 14:18:55,818 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:18:55,818 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 14:18:55,819 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2022-01-10 14:18:55,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2022-01-10 14:18:55,820 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 14:18:55,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2022-01-10 14:18:55,821 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7
[2022-01-10 14:18:55,821 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:18:55,821 INFO  L470      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2022-01-10 14:18:55,821 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 14:18:55,821 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2022-01-10 14:18:55,823 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 14:18:55,823 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:18:55,823 INFO  L514         BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:18:55,844 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 14:18:56,043 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 14:18:56,045 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:18:56,045 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:18:56,045 INFO  L85        PathProgramCache]: Analyzing trace with hash 943236646, now seen corresponding path program 2 times
[2022-01-10 14:18:56,045 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:18:56,045 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868050786]
[2022-01-10 14:18:56,046 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:18:56,046 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:18:56,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:18:56,174 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:18:56,174 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:18:56,174 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868050786]
[2022-01-10 14:18:56,174 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868050786] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:18:56,175 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642163543]
[2022-01-10 14:18:56,175 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 14:18:56,175 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:18:56,177 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:18:56,180 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 14:18:56,201 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 14:18:56,232 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 14:18:56,232 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:18:56,233 INFO  L263         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-01-10 14:18:56,234 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:18:56,955 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:18:56,955 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:18:57,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:18:57,062 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642163543] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:18:57,062 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:18:57,062 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16
[2022-01-10 14:18:57,062 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834049030]
[2022-01-10 14:18:57,063 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:18:57,064 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-01-10 14:18:57,064 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:18:57,065 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-01-10 14:18:57,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240
[2022-01-10 14:18:57,065 INFO  L87              Difference]: Start difference. First operand 11 states and 11 transitions. Second operand  has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 14:18:57,192 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:18:57,193 INFO  L93              Difference]: Finished difference Result 20 states and 24 transitions.
[2022-01-10 14:18:57,193 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-10 14:18:57,194 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 10
[2022-01-10 14:18:57,194 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:18:57,194 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 14:18:57,194 INFO  L226             Difference]: Without dead ends: 16
[2022-01-10 14:18:57,195 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342
[2022-01-10 14:18:57,196 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 14:18:57,196 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time]
[2022-01-10 14:18:57,196 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2022-01-10 14:18:57,200 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2022-01-10 14:18:57,201 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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 14:18:57,201 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions.
[2022-01-10 14:18:57,201 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10
[2022-01-10 14:18:57,201 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:18:57,201 INFO  L470      AbstractCegarLoop]: Abstraction has 16 states and 16 transitions.
[2022-01-10 14:18:57,202 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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 14:18:57,202 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions.
[2022-01-10 14:18:57,202 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2022-01-10 14:18:57,202 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:18:57,204 INFO  L514         BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:18:57,232 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 14:18:57,422 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 14:18:57,422 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:18:57,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:18:57,423 INFO  L85        PathProgramCache]: Analyzing trace with hash 1841910276, now seen corresponding path program 3 times
[2022-01-10 14:18:57,423 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:18:57,423 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385022299]
[2022-01-10 14:18:57,423 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:18:57,423 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:18:57,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:18:57,574 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:18:57,576 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:18:57,577 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385022299]
[2022-01-10 14:18:57,577 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385022299] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:18:57,578 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365592260]
[2022-01-10 14:18:57,578 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 14:18:57,578 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:18:57,579 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:18:57,584 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 14:18:57,611 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 14:18:57,685 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2022-01-10 14:18:57,685 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:18:57,686 INFO  L263         TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core
[2022-01-10 14:18:57,688 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 14:19:41,523 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:19:41,524 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 14:19:42,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:19:42,159 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365592260] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 14:19:42,160 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 14:19:42,160 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31
[2022-01-10 14:19:42,160 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206781785]
[2022-01-10 14:19:42,160 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 14:19:42,160 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2022-01-10 14:19:42,160 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 14:19:42,161 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2022-01-10 14:19:42,161 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=668, Unknown=20, NotChecked=0, Total=930
[2022-01-10 14:19:42,161 INFO  L87              Difference]: Start difference. First operand 16 states and 16 transitions. Second operand  has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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 14:19:44,484 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 14:19:44,485 INFO  L93              Difference]: Finished difference Result 30 states and 39 transitions.
[2022-01-10 14:19:44,485 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2022-01-10 14:19:44,485 INFO  L78                 Accepts]: Start accepts. Automaton has  has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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 15
[2022-01-10 14:19:44,485 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 14:19:44,486 INFO  L225             Difference]: With dead ends: 30
[2022-01-10 14:19:44,486 INFO  L226             Difference]: Without dead ends: 26
[2022-01-10 14:19:44,487 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=452, Invalid=1010, Unknown=20, NotChecked=0, Total=1482
[2022-01-10 14:19:44,488 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 14:19:44,488 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time]
[2022-01-10 14:19:44,488 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2022-01-10 14:19:44,493 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2022-01-10 14:19:44,493 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 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 14:19:44,494 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions.
[2022-01-10 14:19:44,494 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15
[2022-01-10 14:19:44,494 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 14:19:44,494 INFO  L470      AbstractCegarLoop]: Abstraction has 26 states and 26 transitions.
[2022-01-10 14:19:44,494 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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 14:19:44,494 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions.
[2022-01-10 14:19:44,495 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-01-10 14:19:44,495 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 14:19:44,495 INFO  L514         BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1]
[2022-01-10 14:19:44,505 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-01-10 14:19:44,695 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:19:44,698 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 14:19:44,698 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 14:19:44,698 INFO  L85        PathProgramCache]: Analyzing trace with hash -586592444, now seen corresponding path program 4 times
[2022-01-10 14:19:44,698 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 14:19:44,698 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711057954]
[2022-01-10 14:19:44,698 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 14:19:44,698 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 14:19:44,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 14:19:45,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 14:19:45,223 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 14:19:45,223 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711057954]
[2022-01-10 14:19:45,223 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711057954] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 14:19:45,223 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356945967]
[2022-01-10 14:19:45,223 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-01-10 14:19:45,223 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 14:19:45,224 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 14:19:45,225 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 14:19:45,234 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-10 14:19:45,465 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-01-10 14:19:45,466 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 14:19:45,467 INFO  L263         TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 84 conjunts are in the unsatisfiable core
[2022-01-10 14:19:45,469 INFO  L286         TraceCheckSpWp]: Computing forward predicates...