/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_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:04:48,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:04:48,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:04:48,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:04:48,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:04:48,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:04:48,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:04:48,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:04:48,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:04:48,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:04:48,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:04:48,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:04:48,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:04:48,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:04:48,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:04:48,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:04:48,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:04:48,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:04:48,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:04:48,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:04:48,513 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 21:04:48,536 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:04:48,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:04:48,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:04:48,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:04:48,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:04:48,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:04:48,538 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:04:48,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:04:48,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:04:48,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:04:48,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:04:48,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:04:48,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:04:48,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:04:48,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:04:48,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:04:48,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:04:48,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:04:48,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:04:48,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:04:48,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:04:48,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:04:48,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:04:48,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:04:48,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:04:48,542 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:04:48,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:04:48,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:04:48,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:04:48,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:04:48,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:04:48,722 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:04:48,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i [2022-01-10 21:04:48,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0adf0481/075df378233f49b593b5dd35ac396412/FLAGef30933bc [2022-01-10 21:04:49,095 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:04:49,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compare_ground.i [2022-01-10 21:04:49,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0adf0481/075df378233f49b593b5dd35ac396412/FLAGef30933bc [2022-01-10 21:04:49,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0adf0481/075df378233f49b593b5dd35ac396412 [2022-01-10 21:04:49,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:04:49,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:04:49,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:04:49,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:04:49,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:04:49,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1616a2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49, skipping insertion in model container [2022-01-10 21:04:49,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:04:49,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:04:49,647 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_compare_ground.i[816,829] [2022-01-10 21:04:49,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:04:49,673 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:04:49,697 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_compare_ground.i[816,829] [2022-01-10 21:04:49,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:04:49,730 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:04:49,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49 WrapperNode [2022-01-10 21:04:49,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:04:49,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:04:49,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:04:49,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:04:49,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,758 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-01-10 21:04:49,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:04:49,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:04:49,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:04:49,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:04:49,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:04:49,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:04:49,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:04:49,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:04:49,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (1/1) ... [2022-01-10 21:04:49,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:04:49,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:49,828 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 21:04:49,840 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 21:04:49,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:04:49,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:04:49,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 21:04:49,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 21:04:49,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:04:49,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:04:49,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 21:04:49,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 21:04:49,896 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:04:49,897 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:04:50,005 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:04:50,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:04:50,009 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 21:04:50,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:04:50 BoogieIcfgContainer [2022-01-10 21:04:50,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:04:50,011 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:04:50,011 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:04:50,011 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:04:50,013 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:04:50" (1/1) ... [2022-01-10 21:04:50,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:04:50 BasicIcfg [2022-01-10 21:04:50,073 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:04:50,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:04:50,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:04:50,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:04:50,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:04:49" (1/4) ... [2022-01-10 21:04:50,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7aed82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:04:50, skipping insertion in model container [2022-01-10 21:04:50,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:49" (2/4) ... [2022-01-10 21:04:50,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7aed82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:04:50, skipping insertion in model container [2022-01-10 21:04:50,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:04:50" (3/4) ... [2022-01-10 21:04:50,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7aed82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:04:50, skipping insertion in model container [2022-01-10 21:04:50,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:04:50" (4/4) ... [2022-01-10 21:04:50,078 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.iTransformedIcfg [2022-01-10 21:04:50,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:04:50,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:04:50,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:04:50,125 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 21:04:50,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:04:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 21:04:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 21:04:50,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:50,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:50,153 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2134713328, now seen corresponding path program 1 times [2022-01-10 21:04:50,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:50,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35961710] [2022-01-10 21:04:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:50,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:50,278 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 21:04:50,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:50,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35961710] [2022-01-10 21:04:50,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35961710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:50,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:50,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:04:50,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982250398] [2022-01-10 21:04:50,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:50,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:04:50,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:04:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:04:50,306 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 21:04:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:50,320 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2022-01-10 21:04:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:04:50,322 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 21:04:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:50,327 INFO L225 Difference]: With dead ends: 34 [2022-01-10 21:04:50,327 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 21:04:50,330 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 21:04:50,333 INFO L933 BasicCegarLoop]: 23 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, 23 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 21:04:50,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 21:04:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 21:04:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 21:04:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-01-10 21:04:50,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2022-01-10 21:04:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:50,363 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-01-10 21:04:50,364 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 21:04:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-01-10 21:04:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 21:04:50,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:50,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:50,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:04:50,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1246286126, now seen corresponding path program 1 times [2022-01-10 21:04:50,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:50,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72216633] [2022-01-10 21:04:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:50,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:50,511 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 21:04:50,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:50,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72216633] [2022-01-10 21:04:50,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72216633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:50,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:50,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:04:50,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651652255] [2022-01-10 21:04:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:50,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:04:50,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:04:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:50,515 INFO L87 Difference]: Start difference. First operand 15 states and 18 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 21:04:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:50,545 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-01-10 21:04:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:04:50,547 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 21:04:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:50,547 INFO L225 Difference]: With dead ends: 28 [2022-01-10 21:04:50,547 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 21:04:50,548 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 21:04:50,549 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 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 21:04:50,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 21:04:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-01-10 21:04:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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 21:04:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-01-10 21:04:50,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-01-10 21:04:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:50,552 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-01-10 21:04:50,552 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 21:04:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-01-10 21:04:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 21:04:50,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:50,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:50,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:04:50,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash 256908272, now seen corresponding path program 1 times [2022-01-10 21:04:50,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729770565] [2022-01-10 21:04:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:50,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:50,655 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 21:04:50,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:50,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729770565] [2022-01-10 21:04:50,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729770565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:50,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:50,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:04:50,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244381569] [2022-01-10 21:04:50,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:50,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:04:50,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:50,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:04:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:50,657 INFO L87 Difference]: Start difference. First operand 16 states and 19 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 21:04:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:50,668 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-01-10 21:04:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:04:50,668 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 21:04:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:50,668 INFO L225 Difference]: With dead ends: 26 [2022-01-10 21:04:50,669 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 21:04:50,669 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 21:04:50,670 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 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 21:04:50,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 21:04:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 21:04:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 21:04:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-01-10 21:04:50,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-01-10 21:04:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:50,673 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-01-10 21:04:50,673 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 21:04:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-01-10 21:04:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 21:04:50,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:50,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:50,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:04:50,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:50,675 INFO L85 PathProgramCache]: Analyzing trace with hash -807713336, now seen corresponding path program 1 times [2022-01-10 21:04:50,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:50,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097860178] [2022-01-10 21:04:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:50,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:04:50,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097860178] [2022-01-10 21:04:50,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097860178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:50,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:50,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:04:50,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533554949] [2022-01-10 21:04:50,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:50,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:04:50,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:04:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:50,723 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:50,730 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-01-10 21:04:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:04:50,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 21:04:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:50,731 INFO L225 Difference]: With dead ends: 27 [2022-01-10 21:04:50,731 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 21:04:50,732 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 21:04:50,733 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:50,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 21:04:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 21:04:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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 21:04:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-10 21:04:50,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-01-10 21:04:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:50,736 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-10 21:04:50,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-10 21:04:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 21:04:50,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:50,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:50,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:04:50,737 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash 79790345, now seen corresponding path program 1 times [2022-01-10 21:04:50,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:50,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715070226] [2022-01-10 21:04:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:50,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:50,801 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 21:04:50,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:50,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715070226] [2022-01-10 21:04:50,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715070226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:50,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619773021] [2022-01-10 21:04:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:50,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:50,805 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 21:04:50,847 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 21:04:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 21:04:50,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:51,109 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 21:04:51,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:51,154 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 21:04:51,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619773021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:51,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:51,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 21:04:51,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373769999] [2022-01-10 21:04:51,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:51,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 21:04:51,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 21:04:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:04:51,159 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 21:04:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:51,218 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-10 21:04:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 21:04:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 21:04:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:51,220 INFO L225 Difference]: With dead ends: 35 [2022-01-10 21:04:51,220 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 21:04:51,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 21:04:51,221 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:51,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 21:04:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 21:04:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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 21:04:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-10 21:04:51,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-01-10 21:04:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:51,224 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-10 21:04:51,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 21:04:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-10 21:04:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 21:04:51,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:51,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:51,258 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 21:04:51,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:51,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:51,445 INFO L85 PathProgramCache]: Analyzing trace with hash -403128209, now seen corresponding path program 2 times [2022-01-10 21:04:51,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:51,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449690713] [2022-01-10 21:04:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:51,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:51,569 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 21:04:51,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449690713] [2022-01-10 21:04:51,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449690713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752591680] [2022-01-10 21:04:51,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:04:51,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:51,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:51,584 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 21:04:51,585 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 21:04:51,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:04:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:04:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:04:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:51,796 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 21:04:51,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:51,844 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 21:04:51,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752591680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:51,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:51,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-10 21:04:51,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050174551] [2022-01-10 21:04:51,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:51,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 21:04:51,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:51,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 21:04:51,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 21:04:51,845 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 21:04:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:51,988 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-10 21:04:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 21:04:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 20 [2022-01-10 21:04:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:51,990 INFO L225 Difference]: With dead ends: 39 [2022-01-10 21:04:51,990 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 21:04:51,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 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 21:04:51,991 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:51,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 69 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:04:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 21:04:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 21:04:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-10 21:04:51,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2022-01-10 21:04:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:51,995 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-10 21:04:51,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 21:04:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-10 21:04:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 21:04:51,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:51,996 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:52,006 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 21:04:52,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-10 21:04:52,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2037498378, now seen corresponding path program 3 times [2022-01-10 21:04:52,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:52,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863534298] [2022-01-10 21:04:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:52,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 21:04:52,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:52,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863534298] [2022-01-10 21:04:52,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863534298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:52,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147629519] [2022-01-10 21:04:52,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:04:52,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:52,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:52,361 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 21:04:52,362 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 21:04:52,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 21:04:52,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:04:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 21:04:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 21:04:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:55,665 INFO L353 Elim1Store]: treesize reduction 78, result has 53.8 percent of original size [2022-01-10 21:04:55,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 98 [2022-01-10 21:04:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 21:04:55,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147629519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:55,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:55,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-01-10 21:04:55,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132964866] [2022-01-10 21:04:55,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:55,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 21:04:55,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 21:04:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-10 21:04:55,776 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 21:04:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:56,222 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-01-10 21:04:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 21:04:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 29 [2022-01-10 21:04:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:56,223 INFO L225 Difference]: With dead ends: 60 [2022-01-10 21:04:56,223 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 21:04:56,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-10 21:04:56,224 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:56,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 93 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 21:04:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 21:04:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-01-10 21:04:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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 21:04:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-10 21:04:56,228 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2022-01-10 21:04:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:56,229 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-10 21:04:56,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 21:04:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-10 21:04:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 21:04:56,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:56,229 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:56,235 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 21:04:56,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:56,433 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1339433250, now seen corresponding path program 1 times [2022-01-10 21:04:56,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:56,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8798240] [2022-01-10 21:04:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:56,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 21:04:56,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8798240] [2022-01-10 21:04:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8798240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223082369] [2022-01-10 21:04:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:56,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:56,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:56,582 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 21:04:56,583 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 21:04:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 21:04:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 21:04:57,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 21:04:59,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223082369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:59,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:59,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 21 [2022-01-10 21:04:59,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337789660] [2022-01-10 21:04:59,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:59,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 21:04:59,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 21:04:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-10 21:04:59,571 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 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 21:05:08,120 WARN L228 SmtUtils]: Spent 5.49s 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 21:05:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:25,606 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-01-10 21:05:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 21:05:25,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 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 21:05:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:25,608 INFO L225 Difference]: With dead ends: 63 [2022-01-10 21:05:25,608 INFO L226 Difference]: Without dead ends: 54 [2022-01-10 21:05:25,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=158, Invalid=538, Unknown=6, NotChecked=0, Total=702 [2022-01-10 21:05:25,609 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:05:25,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 160 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 178 Invalid, 0 Unknown, 10 Unchecked, 0.5s Time] [2022-01-10 21:05:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-10 21:05:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-01-10 21:05:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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 21:05:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-01-10 21:05:25,615 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 35 [2022-01-10 21:05:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:25,615 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-01-10 21:05:25,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 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 21:05:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-01-10 21:05:25,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 21:05:25,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:25,616 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:25,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 21:05:25,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:25,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash -379791477, now seen corresponding path program 2 times [2022-01-10 21:05:25,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:25,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104106100] [2022-01-10 21:05:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:25,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-01-10 21:05:25,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104106100] [2022-01-10 21:05:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104106100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:05:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920270488] [2022-01-10 21:05:25,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:05:25,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:25,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:05:25,980 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 21:05:25,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 21:05:26,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:05:26,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:05:26,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 21:05:26,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:05:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-01-10 21:05:31,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:05:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 57 refuted. 3 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 21:05:38,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920270488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:05:38,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:05:38,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 14] total 25 [2022-01-10 21:05:38,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433820906] [2022-01-10 21:05:38,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:05:38,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 21:05:38,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:05:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 21:05:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=484, Unknown=2, NotChecked=0, Total=600 [2022-01-10 21:05:38,401 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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 21:05:51,241 WARN L228 SmtUtils]: Spent 8.73s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 21:05:59,840 WARN L228 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 21:06:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:06:06,371 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-01-10 21:06:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 21:06:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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 50 [2022-01-10 21:06:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:06:06,373 INFO L225 Difference]: With dead ends: 101 [2022-01-10 21:06:06,373 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 21:06:06,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=182, Invalid=685, Unknown=3, NotChecked=0, Total=870 [2022-01-10 21:06:06,374 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:06:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 159 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 18 Unchecked, 1.5s Time] [2022-01-10 21:06:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 21:06:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-10 21:06:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 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 21:06:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-01-10 21:06:06,381 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 50 [2022-01-10 21:06:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:06:06,381 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-01-10 21:06:06,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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 21:06:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-01-10 21:06:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 21:06:06,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:06:06,382 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:06:06,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 21:06:06,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:06:06,589 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:06:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:06:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1070169047, now seen corresponding path program 3 times [2022-01-10 21:06:06,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:06:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320558114] [2022-01-10 21:06:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:06:06,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:06:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:06:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-10 21:06:06,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:06:06,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320558114] [2022-01-10 21:06:06,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320558114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:06:06,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032811875] [2022-01-10 21:06:06,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:06:06,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:06:06,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:06:06,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:06:06,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process