/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 02:55:38,810 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 02:55:38,811 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 02:55:38,862 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 02:55:38,864 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 02:55:38,867 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 02:55:38,868 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-10 02:55:38,869 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2022-01-10 02:55:38,873 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 02:55:38,873 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 02:55:38,884 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 02:55:38,884 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 02:55:38,885 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 02:55:38,885 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 02:55:38,886 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 02:55:38,887 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 02:55:38,888 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 02:55:38,889 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 02:55:38,890 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 02:55:38,891 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 02:55:38,891 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 02:55:38,897 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 02:55:38,898 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 02:55:38,898 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 02:55:38,898 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 02:55:38,899 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 02:55:38,899 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 02:55:38,899 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 02:55:38,900 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 02:55:38,900 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 02:55:38,901 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 02:55:38,901 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 02:55:38,901 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 02:55:38,902 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 02:55:38,902 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 02:55:38,902 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 02:55:38,903 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 02:55:38,904 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2022-01-10 02:55:38,918 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 02:55:38,918 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 02:55:38,918 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 02:55:38,919 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 02:55:38,919 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-10 02:55:38,919 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-10 02:55:38,920 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 02:55:38,920 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 02:55:38,920 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 02:55:38,920 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 02:55:38,920 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 02:55:38,920 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 02:55:38,920 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 02:55:38,921 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 02:55:38,921 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 02:55:38,922 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 02:55:38,922 INFO  L138        SettingsManager]:  * Logic for external solver=AUFBV
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 02:55:39,100 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 02:55:39,116 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 02:55:39,118 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 02:55:39,119 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 02:55:39,120 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 02:55:39,121 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i
[2022-01-10 02:55:39,168 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7273eb350/2950c9a8da054c979b7e1ba2b3bc7836/FLAG4f213a1fe
[2022-01-10 02:55:39,521 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 02:55:39,521 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i
[2022-01-10 02:55:39,528 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7273eb350/2950c9a8da054c979b7e1ba2b3bc7836/FLAG4f213a1fe
[2022-01-10 02:55:39,541 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7273eb350/2950c9a8da054c979b7e1ba2b3bc7836
[2022-01-10 02:55:39,543 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 02:55:39,546 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-10 02:55:39,549 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 02:55:39,549 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 02:55:39,551 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 02:55:39,552 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,553 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a11085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39, skipping insertion in model container
[2022-01-10 02:55:39,553 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,558 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 02:55:39,568 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 02:55:39,703 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-zilu/benchmark20_conjunctive.i[873,886]
[2022-01-10 02:55:39,713 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 02:55:39,720 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 02:55:39,729 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-zilu/benchmark20_conjunctive.i[873,886]
[2022-01-10 02:55:39,732 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 02:55:39,745 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 02:55:39,745 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39 WrapperNode
[2022-01-10 02:55:39,746 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 02:55:39,746 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 02:55:39,746 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 02:55:39,746 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 02:55:39,751 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,756 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,768 INFO  L137                Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32
[2022-01-10 02:55:39,768 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 02:55:39,769 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 02:55:39,769 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 02:55:39,769 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 02:55:39,774 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,774 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,777 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,777 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,786 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,788 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,793 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,795 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 02:55:39,796 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 02:55:39,796 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 02:55:39,796 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 02:55:39,797 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (1/1) ...
[2022-01-10 02:55:39,802 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 02:55:39,810 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 02:55:39,821 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 02:55:39,823 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 02:55:39,857 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 02:55:39,857 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 02:55:39,857 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 02:55:39,857 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 02:55:39,900 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 02:55:39,901 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 02:55:40,015 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 02:55:40,020 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 02:55:40,021 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-10 02:55:40,022 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:55:40 BoogieIcfgContainer
[2022-01-10 02:55:40,023 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 02:55:40,024 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 02:55:40,024 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 02:55:40,026 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 02:55:40,027 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:55:39" (1/3) ...
[2022-01-10 02:55:40,027 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5666495f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:55:40, skipping insertion in model container
[2022-01-10 02:55:40,028 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:55:39" (2/3) ...
[2022-01-10 02:55:40,028 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5666495f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:55:40, skipping insertion in model container
[2022-01-10 02:55:40,028 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:55:40" (3/3) ...
[2022-01-10 02:55:40,029 INFO  L111   eAbstractionObserver]: Analyzing ICFG benchmark20_conjunctive.i
[2022-01-10 02:55:40,033 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 02:55:40,033 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 02:55:40,079 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 02:55:40,087 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 02:55:40,087 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 02:55:40,107 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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 02:55:40,111 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 02:55:40,111 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:55:40,112 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:55:40,113 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:55:40,116 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:55:40,117 INFO  L85        PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times
[2022-01-10 02:55:40,124 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:55:40,125 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382121068]
[2022-01-10 02:55:40,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 02:55:40,126 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:55:40,126 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:55:40,128 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:55:40,163 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process
[2022-01-10 02:55:40,208 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 02:55:40,210 INFO  L263         TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-01-10 02:55:40,213 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:55:40,256 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 02:55:40,257 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 02:55:40,258 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:55:40,258 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382121068]
[2022-01-10 02:55:40,258 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382121068] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 02:55:40,259 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 02:55:40,259 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 02:55:40,260 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252574813]
[2022-01-10 02:55:40,261 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 02:55:40,263 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 02:55:40,264 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:55:40,285 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 02:55:40,286 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 02:55:40,287 INFO  L87              Difference]: Start difference. First operand  has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand  has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 02:55:40,295 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:55:40,296 INFO  L93              Difference]: Finished difference Result 20 states and 23 transitions.
[2022-01-10 02:55:40,296 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 02:55:40,298 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) Word has length 7
[2022-01-10 02:55:40,298 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:55:40,303 INFO  L225             Difference]: With dead ends: 20
[2022-01-10 02:55:40,303 INFO  L226             Difference]: Without dead ends: 8
[2022-01-10 02:55:40,305 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 02:55:40,308 INFO  L933         BasicCegarLoop]: 13 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, 13 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 02:55:40,309 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 02:55:40,320 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2022-01-10 02:55:40,328 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2022-01-10 02:55:40,329 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 02:55:40,329 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2022-01-10 02:55:40,330 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7
[2022-01-10 02:55:40,330 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:55:40,331 INFO  L470      AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2022-01-10 02:55:40,331 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 02:55:40,331 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2022-01-10 02:55:40,331 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 02:55:40,331 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:55:40,331 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:55:40,337 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0
[2022-01-10 02:55:40,537 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:55:40,538 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:55:40,538 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:55:40,539 INFO  L85        PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times
[2022-01-10 02:55:40,539 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:55:40,539 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181687307]
[2022-01-10 02:55:40,539 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 02:55:40,539 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:55:40,539 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:55:40,544 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:55:40,547 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process
[2022-01-10 02:55:40,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 02:55:40,576 INFO  L263         TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core
[2022-01-10 02:55:40,577 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:55:40,655 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 02:55:40,655 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 02:55:40,655 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:55:40,655 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181687307]
[2022-01-10 02:55:40,656 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [181687307] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 02:55:40,656 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 02:55:40,656 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-10 02:55:40,656 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262963831]
[2022-01-10 02:55:40,656 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 02:55:40,657 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-01-10 02:55:40,657 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:55:40,657 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-01-10 02:55:40,658 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-01-10 02:55:40,658 INFO  L87              Difference]: Start difference. First operand 8 states and 8 transitions. Second operand  has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 02:55:40,686 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:55:40,686 INFO  L93              Difference]: Finished difference Result 13 states and 13 transitions.
[2022-01-10 02:55:40,687 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-01-10 02:55:40,687 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) Word has length 7
[2022-01-10 02:55:40,687 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:55:40,688 INFO  L225             Difference]: With dead ends: 13
[2022-01-10 02:55:40,688 INFO  L226             Difference]: Without dead ends: 9
[2022-01-10 02:55:40,688 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-01-10 02:55:40,689 INFO  L933         BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 02:55:40,690 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 02:55:40,692 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2022-01-10 02:55:40,693 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9.
[2022-01-10 02:55:40,693 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 02:55:40,694 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2022-01-10 02:55:40,694 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7
[2022-01-10 02:55:40,694 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:55:40,695 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2022-01-10 02:55:40,697 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 02:55:40,697 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2022-01-10 02:55:40,700 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-10 02:55:40,700 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:55:40,700 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:55:40,709 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0
[2022-01-10 02:55:40,909 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:55:40,909 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:55:40,909 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:55:40,910 INFO  L85        PathProgramCache]: Analyzing trace with hash 183170323, now seen corresponding path program 1 times
[2022-01-10 02:55:40,910 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:55:40,910 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15475964]
[2022-01-10 02:55:40,910 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 02:55:40,910 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:55:40,910 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:55:40,912 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:55:40,913 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process
[2022-01-10 02:55:40,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 02:55:40,935 INFO  L263         TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-01-10 02:55:40,936 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:55:41,011 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 02:55:41,011 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 02:55:41,053 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 02:55:41,053 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:55:41,053 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15475964]
[2022-01-10 02:55:41,053 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [15475964] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 02:55:41,053 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 02:55:41,054 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2022-01-10 02:55:41,054 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362465450]
[2022-01-10 02:55:41,054 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 02:55:41,054 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-10 02:55:41,054 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:55:41,055 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-10 02:55:41,055 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2022-01-10 02:55:41,055 INFO  L87              Difference]: Start difference. First operand 9 states and 9 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 02:55:41,121 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:55:41,121 INFO  L93              Difference]: Finished difference Result 17 states and 18 transitions.
[2022-01-10 02:55:41,122 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-01-10 02:55:41,122 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 8
[2022-01-10 02:55:41,122 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:55:41,122 INFO  L225             Difference]: With dead ends: 17
[2022-01-10 02:55:41,122 INFO  L226             Difference]: Without dead ends: 11
[2022-01-10 02:55:41,123 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2022-01-10 02:55:41,124 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 02:55:41,124 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 02:55:41,125 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2022-01-10 02:55:41,126 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2022-01-10 02:55:41,126 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 02:55:41,127 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2022-01-10 02:55:41,127 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8
[2022-01-10 02:55:41,127 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:55:41,127 INFO  L470      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2022-01-10 02:55:41,127 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 02:55:41,127 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2022-01-10 02:55:41,146 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2022-01-10 02:55:41,146 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:55:41,146 INFO  L514         BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:55:41,153 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0
[2022-01-10 02:55:41,347 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:55:41,347 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:55:41,348 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:55:41,348 INFO  L85        PathProgramCache]: Analyzing trace with hash -13685741, now seen corresponding path program 2 times
[2022-01-10 02:55:41,348 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:55:41,348 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238622494]
[2022-01-10 02:55:41,348 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 02:55:41,349 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:55:41,349 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:55:41,350 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:55:41,354 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process
[2022-01-10 02:55:41,375 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 02:55:41,376 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 02:55:41,377 INFO  L263         TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-01-10 02:55:41,378 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:55:41,464 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:55:41,464 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 02:55:41,604 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:55:41,605 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:55:41,605 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238622494]
[2022-01-10 02:55:41,605 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238622494] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 02:55:41,605 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 02:55:41,605 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12
[2022-01-10 02:55:41,605 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803736297]
[2022-01-10 02:55:41,605 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 02:55:41,606 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-01-10 02:55:41,606 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:55:41,606 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-01-10 02:55:41,606 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132
[2022-01-10 02:55:41,607 INFO  L87              Difference]: Start difference. First operand 11 states and 11 transitions. Second operand  has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 02:55:41,879 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:55:41,880 INFO  L93              Difference]: Finished difference Result 25 states and 28 transitions.
[2022-01-10 02:55:41,880 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-01-10 02:55:41,880 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 02:55:41,880 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:55:41,880 INFO  L225             Difference]: With dead ends: 25
[2022-01-10 02:55:41,880 INFO  L226             Difference]: Without dead ends: 15
[2022-01-10 02:55:41,881 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342
[2022-01-10 02:55:41,882 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 02:55:41,882 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-10 02:55:41,883 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2022-01-10 02:55:41,887 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2022-01-10 02:55:41,887 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 02:55:41,887 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2022-01-10 02:55:41,888 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10
[2022-01-10 02:55:41,888 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:55:41,888 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2022-01-10 02:55:41,888 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 02:55:41,888 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2022-01-10 02:55:41,888 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2022-01-10 02:55:41,888 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:55:41,888 INFO  L514         BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:55:41,900 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0
[2022-01-10 02:55:42,095 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:55:42,096 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:55:42,096 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:55:42,096 INFO  L85        PathProgramCache]: Analyzing trace with hash 747788819, now seen corresponding path program 3 times
[2022-01-10 02:55:42,096 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:55:42,096 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564396607]
[2022-01-10 02:55:42,097 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 02:55:42,097 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:55:42,097 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:55:42,099 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:55:42,100 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process
[2022-01-10 02:55:42,128 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2022-01-10 02:55:42,128 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 02:55:42,130 INFO  L263         TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-01-10 02:55:42,133 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:55:42,295 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:55:42,297 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 02:55:42,652 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:55:42,652 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:55:42,652 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564396607]
[2022-01-10 02:55:42,652 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [564396607] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 02:55:42,652 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 02:55:42,653 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20
[2022-01-10 02:55:42,653 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569441976]
[2022-01-10 02:55:42,653 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 02:55:42,653 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2022-01-10 02:55:42,653 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:55:42,653 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2022-01-10 02:55:42,654 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380
[2022-01-10 02:55:42,654 INFO  L87              Difference]: Start difference. First operand 15 states and 15 transitions. Second operand  has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 02:55:45,799 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:55:45,800 INFO  L93              Difference]: Finished difference Result 41 states and 48 transitions.
[2022-01-10 02:55:45,801 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2022-01-10 02:55:45,801 INFO  L78                 Accepts]: Start accepts. Automaton has  has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) Word has length 14
[2022-01-10 02:55:45,801 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:55:45,801 INFO  L225             Difference]: With dead ends: 41
[2022-01-10 02:55:45,801 INFO  L226             Difference]: Without dead ends: 23
[2022-01-10 02:55:45,802 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190
[2022-01-10 02:55:45,803 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-01-10 02:55:45,803 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 41 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-01-10 02:55:45,805 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2022-01-10 02:55:45,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2022-01-10 02:55:45,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 02:55:45,812 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2022-01-10 02:55:45,812 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14
[2022-01-10 02:55:45,813 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:55:45,813 INFO  L470      AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2022-01-10 02:55:45,813 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 02:55:45,813 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2022-01-10 02:55:45,814 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-01-10 02:55:45,814 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:55:45,814 INFO  L514         BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:55:45,825 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0
[2022-01-10 02:55:46,020 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:55:46,020 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:55:46,021 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:55:46,021 INFO  L85        PathProgramCache]: Analyzing trace with hash -553404909, now seen corresponding path program 4 times
[2022-01-10 02:55:46,021 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:55:46,021 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891343563]
[2022-01-10 02:55:46,022 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-01-10 02:55:46,022 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:55:46,022 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:55:46,023 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:55:46,025 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process
[2022-01-10 02:55:46,054 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-01-10 02:55:46,055 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 02:55:46,057 WARN  L261         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 34 conjunts are in the unsatisfiable core
[2022-01-10 02:55:46,059 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:55:46,391 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:55:46,391 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 02:55:47,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:55:47,721 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:55:47,721 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891343563]
[2022-01-10 02:55:47,721 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891343563] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 02:55:47,721 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 02:55:47,722 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36
[2022-01-10 02:55:47,722 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994574081]
[2022-01-10 02:55:47,722 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 02:55:47,722 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 36 states
[2022-01-10 02:55:47,722 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:55:47,722 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2022-01-10 02:55:47,723 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260
[2022-01-10 02:55:47,723 INFO  L87              Difference]: Start difference. First operand 23 states and 23 transitions. Second operand  has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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 02:56:57,806 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:56:57,807 INFO  L93              Difference]: Finished difference Result 73 states and 88 transitions.
[2022-01-10 02:56:57,807 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. 
[2022-01-10 02:56:57,807 INFO  L78                 Accepts]: Start accepts. Automaton has  has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22
[2022-01-10 02:56:57,807 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:56:57,808 INFO  L225             Difference]: With dead ends: 73
[2022-01-10 02:56:57,808 INFO  L226             Difference]: Without dead ends: 39
[2022-01-10 02:56:57,809 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=1233, Invalid=3189, Unknown=0, NotChecked=0, Total=4422
[2022-01-10 02:56:57,810 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 257 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-01-10 02:56:57,810 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 74 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-01-10 02:56:57,810 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2022-01-10 02:56:57,818 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2022-01-10 02:56:57,818 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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 02:56:57,819 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions.
[2022-01-10 02:56:57,819 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 22
[2022-01-10 02:56:57,819 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:56:57,819 INFO  L470      AbstractCegarLoop]: Abstraction has 39 states and 39 transitions.
[2022-01-10 02:56:57,820 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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 02:56:57,820 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions.
[2022-01-10 02:56:57,820 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2022-01-10 02:56:57,820 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:56:57,820 INFO  L514         BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:56:57,829 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0
[2022-01-10 02:56:58,021 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:56:58,021 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:56:58,022 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:56:58,022 INFO  L85        PathProgramCache]: Analyzing trace with hash -460165613, now seen corresponding path program 5 times
[2022-01-10 02:56:58,022 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:56:58,022 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447053369]
[2022-01-10 02:56:58,022 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2022-01-10 02:56:58,022 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:56:58,022 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:56:58,024 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:56:58,024 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process
[2022-01-10 02:56:58,125 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s)
[2022-01-10 02:56:58,125 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 02:56:58,131 WARN  L261         TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 66 conjunts are in the unsatisfiable core
[2022-01-10 02:56:58,133 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:56:59,045 INFO  L134       CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:56:59,045 INFO  L328         TraceCheckSpWp]: Computing backward predicates...