/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:05:11,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:05:11,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:05:11,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:05:11,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:05:11,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:05:11,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:05:11,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:05:11,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:05:11,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:05:11,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:05:11,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:05:11,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:05:11,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:05:11,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:05:11,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:05:11,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:05:11,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:05:11,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:05:11,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:05:11,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:05:11,830 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:05:11,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:05:11,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:05:11,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:05:11,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:05:11,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:05:11,831 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:05:11,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:05:11,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:05:11,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:05:11,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:05:11,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:05:11,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:05:11,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:05:11,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:05:11,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:05:11,834 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:05:11,834 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:05:11,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:05:11,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:05:11,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:05:11,981 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:05:11,982 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:05:11,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2022-01-10 21:05:12,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624a0c035/aa9247b7f8234e7fabcada69870cb78f/FLAGf9fc7041f [2022-01-10 21:05:12,423 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:05:12,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2022-01-10 21:05:12,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624a0c035/aa9247b7f8234e7fabcada69870cb78f/FLAGf9fc7041f [2022-01-10 21:05:12,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624a0c035/aa9247b7f8234e7fabcada69870cb78f [2022-01-10 21:05:12,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:05:12,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:05:12,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:05:12,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:05:12,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:05:12,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da5fe01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12, skipping insertion in model container [2022-01-10 21:05:12,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:05:12,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:05:12,606 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i[816,829] [2022-01-10 21:05:12,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:05:12,649 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:05:12,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i[816,829] [2022-01-10 21:05:12,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:05:12,667 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:05:12,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12 WrapperNode [2022-01-10 21:05:12,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:05:12,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:05:12,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:05:12,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:05:12,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,687 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2022-01-10 21:05:12,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:05:12,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:05:12,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:05:12,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:05:12,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:05:12,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:05:12,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:05:12,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:05:12,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:12,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:05:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:05:12,735 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 21:05:12,745 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 21:05:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:05:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:05:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 21:05:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 21:05:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:05:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:05:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 21:05:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 21:05:12,816 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:05:12,817 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:05:12,939 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:05:12,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:05:12,943 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 21:05:12,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:05:12 BoogieIcfgContainer [2022-01-10 21:05:12,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:05:12,944 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:05:12,944 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:05:12,945 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:05:12,947 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:05:12" (1/1) ... [2022-01-10 21:05:13,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:05:13 BasicIcfg [2022-01-10 21:05:13,016 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:05:13,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:05:13,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:05:13,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:05:13,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:05:12" (1/4) ... [2022-01-10 21:05:13,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bf6843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:05:13, skipping insertion in model container [2022-01-10 21:05:13,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:05:12" (2/4) ... [2022-01-10 21:05:13,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bf6843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:05:13, skipping insertion in model container [2022-01-10 21:05:13,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:05:12" (3/4) ... [2022-01-10 21:05:13,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bf6843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:05:13, skipping insertion in model container [2022-01-10 21:05:13,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:05:13" (4/4) ... [2022-01-10 21:05:13,021 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.iTransformedIcfg [2022-01-10 21:05:13,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:05:13,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:05:13,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:05:13,053 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 21:05:13,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:05:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 21:05:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 21:05:13,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:13,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:13,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1373313443, now seen corresponding path program 1 times [2022-01-10 21:05:13,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:13,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756939116] [2022-01-10 21:05:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:13,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:13,189 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 21:05:13,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756939116] [2022-01-10 21:05:13,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756939116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:05:13,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:05:13,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:05:13,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653788306] [2022-01-10 21:05:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:05:13,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:05:13,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:05:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:05:13,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:05:13,215 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 4.5) internal successors, (9), 2 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 21:05:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:13,223 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-01-10 21:05:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:05:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2022-01-10 21:05:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:13,229 INFO L225 Difference]: With dead ends: 32 [2022-01-10 21:05:13,229 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 21:05:13,230 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 21:05:13,233 INFO L933 BasicCegarLoop]: 20 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, 20 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 21:05:13,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:05:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 21:05:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-10 21:05:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 21:05:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-10 21:05:13,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-01-10 21:05:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:13,253 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-10 21:05:13,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 21:05:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-10 21:05:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 21:05:13,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:13,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:13,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:05:13,255 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:13,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2033226651, now seen corresponding path program 1 times [2022-01-10 21:05:13,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:13,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864010607] [2022-01-10 21:05:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:13,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:13,339 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 21:05:13,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864010607] [2022-01-10 21:05:13,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864010607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:05:13,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:05:13,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:05:13,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359884607] [2022-01-10 21:05:13,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:05:13,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:05:13,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:05:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:05:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:05:13,342 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 21:05:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:13,353 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-01-10 21:05:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:05:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Word has length 9 [2022-01-10 21:05:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:13,354 INFO L225 Difference]: With dead ends: 26 [2022-01-10 21:05:13,354 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 21:05:13,354 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 21:05:13,355 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:05:13,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:05:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 21:05:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-01-10 21:05:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 21:05:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-10 21:05:13,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-01-10 21:05:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:13,359 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-10 21:05:13,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 21:05:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-10 21:05:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 21:05:13,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:13,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:13,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:05:13,360 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash -76755229, now seen corresponding path program 1 times [2022-01-10 21:05:13,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:13,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247214722] [2022-01-10 21:05:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:13,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:05:13,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:13,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247214722] [2022-01-10 21:05:13,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247214722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:05:13,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:05:13,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:05:13,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946269798] [2022-01-10 21:05:13,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:05:13,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:05:13,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:05:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:05:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:05:13,429 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 21:05:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:13,440 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-01-10 21:05:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:05:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 11 [2022-01-10 21:05:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:13,441 INFO L225 Difference]: With dead ends: 24 [2022-01-10 21:05:13,441 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 21:05:13,441 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 21:05:13,442 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:05:13,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:05:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 21:05:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-01-10 21:05:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 21:05:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-10 21:05:13,446 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2022-01-10 21:05:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:13,446 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-10 21:05:13,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 21:05:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-10 21:05:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 21:05:13,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:13,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:13,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:05:13,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash 163079489, now seen corresponding path program 1 times [2022-01-10 21:05:13,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:13,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422876351] [2022-01-10 21:05:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:13,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:05:13,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:13,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422876351] [2022-01-10 21:05:13,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422876351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:05:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716697383] [2022-01-10 21:05:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:13,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:13,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:05:13,557 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 21:05:13,616 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 21:05:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:05:13,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:05:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:05:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:05:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:05:14,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716697383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:05:14,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:05:14,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 21:05:14,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698820601] [2022-01-10 21:05:14,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:05:14,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 21:05:14,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:05:14,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 21:05:14,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:05:14,032 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 21:05:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:14,104 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-01-10 21:05:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 21:05:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 13 [2022-01-10 21:05:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:14,106 INFO L225 Difference]: With dead ends: 33 [2022-01-10 21:05:14,106 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 21:05:14,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 21:05:14,107 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:05:14,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:05:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 21:05:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 21:05:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 21:05:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-10 21:05:14,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2022-01-10 21:05:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:14,112 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-10 21:05:14,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 21:05:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-10 21:05:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 21:05:14,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:14,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:14,145 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 21:05:14,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:14,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash -26515141, now seen corresponding path program 2 times [2022-01-10 21:05:14,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:14,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778553615] [2022-01-10 21:05:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:14,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:05:14,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778553615] [2022-01-10 21:05:14,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778553615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:05:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652305336] [2022-01-10 21:05:14,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:05:14,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:14,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:05:14,432 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 21:05:14,460 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 21:05:14,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:05:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:05:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:05:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:05:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:05:14,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:05:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:05:14,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652305336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:05:14,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:05:14,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-10 21:05:14,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819416526] [2022-01-10 21:05:14,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:05:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 21:05:14,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:05:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 21:05:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 21:05:14,638 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 21:05:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:14,721 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-01-10 21:05:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 21:05:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) Word has length 19 [2022-01-10 21:05:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:14,722 INFO L225 Difference]: With dead ends: 35 [2022-01-10 21:05:14,722 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 21:05:14,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 21:05:14,723 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:05:14,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:05:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 21:05:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 21:05:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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 21:05:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-10 21:05:14,727 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-01-10 21:05:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:14,727 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-10 21:05:14,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 21:05:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-10 21:05:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 21:05:14,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:14,728 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:14,750 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 21:05:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:14,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -428045355, now seen corresponding path program 3 times [2022-01-10 21:05:14,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:14,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163479497] [2022-01-10 21:05:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:14,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:05:15,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163479497] [2022-01-10 21:05:15,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163479497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:05:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835895992] [2022-01-10 21:05:15,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:05:15,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:15,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:05:15,098 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 21:05:15,099 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 21:05:15,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 21:05:15,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:05:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 21:05:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:05:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:05:35,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:05:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 21:05:43,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835895992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:05:43,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:05:43,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 18 [2022-01-10 21:05:43,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613162256] [2022-01-10 21:05:43,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:05:43,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 21:05:43,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:05:43,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 21:05:43,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=211, Unknown=13, NotChecked=0, Total=306 [2022-01-10 21:05:43,434 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 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 21:05:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:59,351 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-01-10 21:05:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 21:05:59,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 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 25 [2022-01-10 21:05:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:59,352 INFO L225 Difference]: With dead ends: 55 [2022-01-10 21:05:59,352 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 21:05:59,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=119, Invalid=284, Unknown=17, NotChecked=0, Total=420 [2022-01-10 21:05:59,353 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:05:59,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-01-10 21:05:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 21:05:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 21:05:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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 21:05:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-01-10 21:05:59,359 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 25 [2022-01-10 21:05:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:59,359 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-01-10 21:05:59,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 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 21:05:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-01-10 21:05:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 21:05:59,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:59,360 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:59,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 21:05:59,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:59,562 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash 142999883, now seen corresponding path program 4 times [2022-01-10 21:05:59,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:59,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566806021] [2022-01-10 21:05:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:59,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 21:05:59,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566806021] [2022-01-10 21:05:59,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566806021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:05:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286866521] [2022-01-10 21:05:59,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 21:05:59,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:59,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:05:59,756 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 21:05:59,757 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 21:05:59,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 21:05:59,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:05:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 21:05:59,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:06:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 21:06:02,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:06:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 21:06:05,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286866521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:06:05,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:06:05,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 21 [2022-01-10 21:06:05,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650579454] [2022-01-10 21:06:05,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:06:05,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 21:06:05,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:06:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 21:06:05,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=335, Unknown=1, NotChecked=0, Total=420 [2022-01-10 21:06:05,930 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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 21:06:15,259 WARN L228 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 21:06:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:06:21,347 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-01-10 21:06:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 21:06:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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 35 [2022-01-10 21:06:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:06:21,348 INFO L225 Difference]: With dead ends: 55 [2022-01-10 21:06:21,348 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 21:06:21,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=130, Invalid=468, Unknown=2, NotChecked=0, Total=600 [2022-01-10 21:06:21,349 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:06:21,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 134 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 9 Unchecked, 0.8s Time] [2022-01-10 21:06:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 21:06:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-10 21:06:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 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 21:06:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-10 21:06:21,355 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 35 [2022-01-10 21:06:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:06:21,355 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-10 21:06:21,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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 21:06:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-10 21:06:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 21:06:21,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:06:21,356 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:06:21,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 21:06:21,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:06:21,576 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:06:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:06:21,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1348234207, now seen corresponding path program 5 times [2022-01-10 21:06:21,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:06:21,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157325011] [2022-01-10 21:06:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:06:21,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:06:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:06:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 21:06:21,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:06:21,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157325011] [2022-01-10 21:06:21,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157325011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:06:21,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832324849] [2022-01-10 21:06:21,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 21:06:21,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:06:21,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:06:21,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:06:21,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process