/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 15:20:04,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 15:20:04,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 15:20:05,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 15:20:05,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 15:20:05,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 15:20:05,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 15:20:05,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 15:20:05,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 15:20:05,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 15:20:05,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 15:20:05,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 15:20:05,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 15:20:05,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 15:20:05,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 15:20:05,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 15:20:05,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 15:20:05,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 15:20:05,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 15:20:05,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 15:20:05,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 15:20:05,080 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 15:20:05,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 15:20:05,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 15:20:05,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 15:20:05,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 15:20:05,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 15:20:05,081 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 15:20:05,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 15:20:05,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 15:20:05,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 15:20:05,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 15:20:05,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 15:20:05,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 15:20:05,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 15:20:05,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:20:05,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 15:20:05,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 15:20:05,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 15:20:05,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 15:20:05,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 15:20:05,100 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 15:20:05,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 15:20:05,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 15:20:05,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 15:20:05,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 15:20:05,101 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 15:20:05,101 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 15:20:05,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 15:20:05,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 15:20:05,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 15:20:05,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 15:20:05,266 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 15:20:05,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2022-01-10 15:20:05,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e4f0ebe/2e9a5f124b2a40e3b77363c8f8fd2d9d/FLAGb479de26d [2022-01-10 15:20:05,607 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 15:20:05,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2022-01-10 15:20:05,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e4f0ebe/2e9a5f124b2a40e3b77363c8f8fd2d9d/FLAGb479de26d [2022-01-10 15:20:06,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e4f0ebe/2e9a5f124b2a40e3b77363c8f8fd2d9d [2022-01-10 15:20:06,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 15:20:06,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 15:20:06,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 15:20:06,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 15:20:06,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 15:20:06,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65fdc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06, skipping insertion in model container [2022-01-10 15:20:06,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 15:20:06,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 15:20:06,206 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_reverse_ground.i[816,829] [2022-01-10 15:20:06,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:20:06,239 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 15:20:06,252 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_reverse_ground.i[816,829] [2022-01-10 15:20:06,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:20:06,270 INFO L208 MainTranslator]: Completed translation [2022-01-10 15:20:06,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06 WrapperNode [2022-01-10 15:20:06,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 15:20:06,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 15:20:06,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 15:20:06,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 15:20:06,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,302 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-01-10 15:20:06,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 15:20:06,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 15:20:06,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 15:20:06,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 15:20:06,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 15:20:06,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 15:20:06,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 15:20:06,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 15:20:06,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:20:06,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:20:06,373 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 15:20:06,383 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 15:20:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 15:20:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 15:20:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 15:20:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 15:20:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 15:20:06,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 15:20:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 15:20:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 15:20:06,443 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 15:20:06,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 15:20:06,576 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 15:20:06,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 15:20:06,593 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 15:20:06,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:06 BoogieIcfgContainer [2022-01-10 15:20:06,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 15:20:06,595 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 15:20:06,595 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 15:20:06,610 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 15:20:06,612 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:06" (1/1) ... [2022-01-10 15:20:06,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:20:06 BasicIcfg [2022-01-10 15:20:06,712 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 15:20:06,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 15:20:06,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 15:20:06,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 15:20:06,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:20:06" (1/4) ... [2022-01-10 15:20:06,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8f887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:20:06, skipping insertion in model container [2022-01-10 15:20:06,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:20:06" (2/4) ... [2022-01-10 15:20:06,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8f887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:20:06, skipping insertion in model container [2022-01-10 15:20:06,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:20:06" (3/4) ... [2022-01-10 15:20:06,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8f887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:20:06, skipping insertion in model container [2022-01-10 15:20:06,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:20:06" (4/4) ... [2022-01-10 15:20:06,717 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.iTransformedIcfg [2022-01-10 15:20:06,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 15:20:06,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 15:20:06,762 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 15:20:06,768 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 15:20:06,769 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 15:20:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 15:20:06,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:20:06,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:20:06,784 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:20:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:20:06,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1373313443, now seen corresponding path program 1 times [2022-01-10 15:20:06,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:20:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202143953] [2022-01-10 15:20:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:20:06,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:20:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:20:06,960 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 15:20:06,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:20:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202143953] [2022-01-10 15:20:06,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202143953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:20:06,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:20:06,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:20:06,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031288053] [2022-01-10 15:20:06,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:20:06,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 15:20:06,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:20:06,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 15:20:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 15:20:06,994 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:20:07,006 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-01-10 15:20:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 15:20:07,008 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 15:20:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:20:07,016 INFO L225 Difference]: With dead ends: 32 [2022-01-10 15:20:07,016 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 15:20:07,018 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 15:20:07,023 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:20:07,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 15:20:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 15:20:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-10 15:20:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-10 15:20:07,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-01-10 15:20:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:20:07,044 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-10 15:20:07,044 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 15:20:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-10 15:20:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 15:20:07,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:20:07,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:20:07,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 15:20:07,045 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:20:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:20:07,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2033226651, now seen corresponding path program 1 times [2022-01-10 15:20:07,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:20:07,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139335320] [2022-01-10 15:20:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:20:07,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:20:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:20:07,188 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 15:20:07,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:20:07,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139335320] [2022-01-10 15:20:07,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139335320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:20:07,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:20:07,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:20:07,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404277556] [2022-01-10 15:20:07,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:20:07,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:20:07,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:20:07,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:20:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:20:07,191 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:20:07,238 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-01-10 15:20:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:20:07,239 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 15:20:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:20:07,239 INFO L225 Difference]: With dead ends: 28 [2022-01-10 15:20:07,239 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 15:20:07,240 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 15:20:07,240 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:20:07,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 15:20:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 15:20:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-01-10 15:20:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-10 15:20:07,244 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-01-10 15:20:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:20:07,244 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-10 15:20:07,244 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 15:20:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-10 15:20:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 15:20:07,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:20:07,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:20:07,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 15:20:07,245 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:20:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:20:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash 163079489, now seen corresponding path program 1 times [2022-01-10 15:20:07,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:20:07,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769187302] [2022-01-10 15:20:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:20:07,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:20:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:20:07,331 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 15:20:07,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:20:07,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769187302] [2022-01-10 15:20:07,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769187302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:20:07,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886648337] [2022-01-10 15:20:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:20:07,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:20:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:20:07,334 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 15:20:07,335 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 15:20:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:20:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 15:20:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:20:07,578 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 15:20:07,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:20:07,617 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 15:20:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886648337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:20:07,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:20:07,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 15:20:07,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387289622] [2022-01-10 15:20:07,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:20:07,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 15:20:07,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:20:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 15:20:07,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 15:20:07,619 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:20:07,732 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-01-10 15:20:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 15:20:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-10 15:20:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:20:07,733 INFO L225 Difference]: With dead ends: 39 [2022-01-10 15:20:07,733 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 15:20:07,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 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 15:20:07,734 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:20:07,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 15:20:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 15:20:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 15:20:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-10 15:20:07,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2022-01-10 15:20:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:20:07,740 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-10 15:20:07,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-10 15:20:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 15:20:07,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:20:07,741 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:20:07,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 15:20:07,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:20:07,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:20:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:20:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash -428045355, now seen corresponding path program 2 times [2022-01-10 15:20:07,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:20:07,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989030252] [2022-01-10 15:20:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:20:07,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:20:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:20:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 15:20:08,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:20:08,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989030252] [2022-01-10 15:20:08,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989030252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:20:08,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738947463] [2022-01-10 15:20:08,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 15:20:08,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:20:08,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:20:08,182 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 15:20:08,183 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 15:20:08,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 15:20:08,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:20:08,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 15:20:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:20:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:20:22,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:20:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 15:20:24,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738947463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:20:24,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:20:24,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-10 15:20:24,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619164317] [2022-01-10 15:20:24,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:20:24,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 15:20:24,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:20:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 15:20:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=156, Unknown=6, NotChecked=0, Total=240 [2022-01-10 15:20:24,609 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:20:32,901 WARN L228 SmtUtils]: Spent 5.62s 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 15:21:01,427 WARN L228 SmtUtils]: Spent 6.49s 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 15:21:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:21:01,789 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2022-01-10 15:21:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 15:21:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-10 15:21:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:21:01,790 INFO L225 Difference]: With dead ends: 67 [2022-01-10 15:21:01,790 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 15:21:01,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=165, Invalid=284, Unknown=13, NotChecked=0, Total=462 [2022-01-10 15:21:01,792 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:21:01,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 76 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 80 Invalid, 0 Unknown, 28 Unchecked, 2.0s Time] [2022-01-10 15:21:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 15:21:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-10 15:21:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 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 15:21:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-01-10 15:21:01,799 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 25 [2022-01-10 15:21:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:21:01,799 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-01-10 15:21:01,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:21:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-01-10 15:21:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 15:21:01,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:21:01,800 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:21:01,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 15:21:02,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 15:21:02,005 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:21:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:21:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash -984477793, now seen corresponding path program 3 times [2022-01-10 15:21:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:21:02,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787175209] [2022-01-10 15:21:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:21:02,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:21:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:21:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 15:21:02,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:21:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787175209] [2022-01-10 15:21:02,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787175209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:21:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636974767] [2022-01-10 15:21:02,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 15:21:02,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:21:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:21:02,496 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 15:21:02,497 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 15:21:02,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 15:21:02,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:21:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 15:21:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:21:02,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-01-10 15:21:03,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-01-10 15:21:07,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 15:21:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 15:21:07,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 20 [2022-01-10 15:21:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-01-10 15:21:07,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 15:21:07,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636974767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:21:07,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 15:21:07,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-01-10 15:21:07,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479126222] [2022-01-10 15:21:07,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:21:07,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 15:21:07,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:21:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 15:21:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-01-10 15:21:07,758 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:21:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:21:07,896 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-01-10 15:21:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 15:21:07,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-10 15:21:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:21:07,897 INFO L225 Difference]: With dead ends: 54 [2022-01-10 15:21:07,897 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 15:21:07,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-01-10 15:21:07,898 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:21:07,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-01-10 15:21:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 15:21:07,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 15:21:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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 15:21:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-10 15:21:07,909 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2022-01-10 15:21:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:21:07,909 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-10 15:21:07,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:21:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-10 15:21:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 15:21:07,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:21:07,910 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:21:07,915 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 15:21:08,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:21:08,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:21:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:21:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1435887270, now seen corresponding path program 1 times [2022-01-10 15:21:08,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:21:08,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579606675] [2022-01-10 15:21:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:21:08,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:21:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:21:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-10 15:21:08,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:21:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579606675] [2022-01-10 15:21:08,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579606675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:21:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789815233] [2022-01-10 15:21:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:21:08,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:21:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:21:08,449 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 15:21:08,451 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 15:21:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:21:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 15:21:08,589 INFO L286 TraceCheckSpWp]: Computing forward predicates...