/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_SUM.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:59:08,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:59:08,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:59:08,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 02:59:08,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:59:08,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:59:08,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:59:08,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:59:08,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:59:08,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:59:08,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:59:08,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:59:08,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:59:08,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:59:08,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:59:08,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:59:08,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:59:08,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:59:08,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:59:08,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:59:08,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:59:08,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-01-11 02:59:08,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:59:08,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:59:08,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:59:08,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:59:08,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:59:08,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:59:08,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:59:08,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:59:08,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:59:08,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:59:08,262 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:59:08,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:59:08,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:59:08,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:59:08,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:59:08,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:59:08,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:59:08,264 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:59:08,265 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:59:08,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:59:08,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:59:08,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:59:08,266 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:59:08,266 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:59:08,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:59:08,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:59:08,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:59:08,480 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:59:08,481 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:59:08,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2022-01-11 02:59:08,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde35847d/cd8c26671bdf4fa092d95060a57a1296/FLAG5f550122f [2022-01-11 02:59:08,882 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:59:08,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2022-01-11 02:59:08,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde35847d/cd8c26671bdf4fa092d95060a57a1296/FLAG5f550122f [2022-01-11 02:59:08,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde35847d/cd8c26671bdf4fa092d95060a57a1296 [2022-01-11 02:59:08,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:59:08,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:59:08,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:59:08,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:59:08,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:59:08,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:59:08" (1/1) ... [2022-01-11 02:59:08,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b6aa4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:08, skipping insertion in model container [2022-01-11 02:59:08,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:59:08" (1/1) ... [2022-01-11 02:59:08,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:59:08,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:59:09,068 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_two_index_05.i[814,827] [2022-01-11 02:59:09,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:59:09,089 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:59:09,101 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_two_index_05.i[814,827] [2022-01-11 02:59:09,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:59:09,136 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:59:09,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09 WrapperNode [2022-01-11 02:59:09,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:59:09,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:59:09,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:59:09,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:59:09,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,172 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-01-11 02:59:09,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:59:09,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:59:09,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:59:09,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:59:09,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:59:09,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:59:09,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:59:09,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:59:09,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:59:09,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:59:09,227 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) [2022-01-11 02:59:09,231 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 [2022-01-11 02:59:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:59:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:59:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 02:59:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 02:59:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:59:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:59:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 02:59:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 02:59:09,299 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:59:09,300 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:59:09,419 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:59:09,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:59:09,422 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-11 02:59:09,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:59:09 BoogieIcfgContainer [2022-01-11 02:59:09,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:59:09,424 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:59:09,424 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:59:09,425 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:59:09,426 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:59:09" (1/1) ... [2022-01-11 02:59:09,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:59:09 BasicIcfg [2022-01-11 02:59:09,538 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:59:09,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:59:09,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:59:09,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:59:09,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:59:08" (1/4) ... [2022-01-11 02:59:09,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c048230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:59:09, skipping insertion in model container [2022-01-11 02:59:09,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:59:09" (2/4) ... [2022-01-11 02:59:09,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c048230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:59:09, skipping insertion in model container [2022-01-11 02:59:09,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:59:09" (3/4) ... [2022-01-11 02:59:09,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c048230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:59:09, skipping insertion in model container [2022-01-11 02:59:09,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:59:09" (4/4) ... [2022-01-11 02:59:09,549 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.iTransformedIcfg [2022-01-11 02:59:09,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:59:09,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 02:59:09,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:59:09,599 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 [2022-01-11 02:59:09,600 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 02:59:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:59:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-11 02:59:09,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:59:09,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:59:09,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:59:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:59:09,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1184970882, now seen corresponding path program 1 times [2022-01-11 02:59:09,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:59:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943063743] [2022-01-11 02:59:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:09,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:59:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:59:09,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:59:09,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943063743] [2022-01-11 02:59:09,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943063743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:59:09,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:59:09,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:59:09,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522054094] [2022-01-11 02:59:09,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:59:09,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:59:09,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:59:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:59:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:59:09,808 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-01-11 02:59:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:59:09,821 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-01-11 02:59:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:59:09,823 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 [2022-01-11 02:59:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:59:09,828 INFO L225 Difference]: With dead ends: 27 [2022-01-11 02:59:09,828 INFO L226 Difference]: Without dead ends: 11 [2022-01-11 02:59:09,830 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 [2022-01-11 02:59:09,833 INFO L933 BasicCegarLoop]: 17 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, 17 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 [2022-01-11 02:59:09,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:59:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-11 02:59:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-11 02:59:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:59:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-01-11 02:59:09,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2022-01-11 02:59:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:59:09,854 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-01-11 02:59:09,854 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) [2022-01-11 02:59:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-01-11 02:59:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-11 02:59:09,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:59:09,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:59:09,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:59:09,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:59:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:59:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash -296543680, now seen corresponding path program 1 times [2022-01-11 02:59:09,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:59:09,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111637651] [2022-01-11 02:59:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:09,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:59:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:59:09,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:59:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111637651] [2022-01-11 02:59:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111637651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:59:09,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:59:09,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:59:09,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370423683] [2022-01-11 02:59:09,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:59:09,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:59:09,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:59:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:59:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:59:09,991 INFO L87 Difference]: Start difference. First operand 11 states and 13 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) [2022-01-11 02:59:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:59:10,040 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-01-11 02:59:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:59:10,040 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 [2022-01-11 02:59:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:59:10,041 INFO L225 Difference]: With dead ends: 20 [2022-01-11 02:59:10,042 INFO L226 Difference]: Without dead ends: 12 [2022-01-11 02:59:10,046 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 [2022-01-11 02:59:10,046 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:59:10,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:59:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-11 02:59:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-11 02:59:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2022-01-11 02:59:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-01-11 02:59:10,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-01-11 02:59:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:59:10,055 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-01-11 02:59:10,055 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) [2022-01-11 02:59:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-01-11 02:59:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 02:59:10,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:59:10,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:59:10,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:59:10,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:59:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:59:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -694313175, now seen corresponding path program 1 times [2022-01-11 02:59:10,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:59:10,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594207216] [2022-01-11 02:59:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:10,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:59:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:59:10,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:59:10,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594207216] [2022-01-11 02:59:10,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594207216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:59:10,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:59:10,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:59:10,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682503284] [2022-01-11 02:59:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:59:10,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:59:10,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:59:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:59:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:59:10,149 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-01-11 02:59:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:59:10,185 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-01-11 02:59:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:59:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-11 02:59:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:59:10,187 INFO L225 Difference]: With dead ends: 24 [2022-01-11 02:59:10,187 INFO L226 Difference]: Without dead ends: 18 [2022-01-11 02:59:10,189 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 [2022-01-11 02:59:10,191 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:59:10,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:59:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-11 02:59:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-01-11 02:59:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2022-01-11 02:59:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-01-11 02:59:10,194 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-01-11 02:59:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:59:10,194 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-01-11 02:59:10,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-01-11 02:59:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-01-11 02:59:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 02:59:10,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:59:10,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:59:10,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:59:10,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:59:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:59:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash -22181152, now seen corresponding path program 1 times [2022-01-11 02:59:10,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:59:10,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88061029] [2022-01-11 02:59:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:10,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:59:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:59:10,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:59:10,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88061029] [2022-01-11 02:59:10,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88061029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:59:10,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218585869] [2022-01-11 02:59:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:10,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:59:10,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:59:10,276 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) [2022-01-11 02:59:10,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:59:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:10,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-11 02:59:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:59:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:59:10,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:59:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:59:10,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218585869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:59:10,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:59:10,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-11 02:59:10,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921950415] [2022-01-11 02:59:10,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:59:10,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:59:10,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:59:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:59:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:59:10,491 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-01-11 02:59:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:59:10,699 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-01-11 02:59:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:59:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) Word has length 11 [2022-01-11 02:59:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:59:10,701 INFO L225 Difference]: With dead ends: 36 [2022-01-11 02:59:10,701 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 02:59:10,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-11 02:59:10,702 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:59:10,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 02:59:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 02:59:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-01-11 02:59:10,705 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) [2022-01-11 02:59:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-11 02:59:10,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-11 02:59:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:59:10,705 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-11 02:59:10,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-01-11 02:59:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-11 02:59:10,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 02:59:10,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:59:10,706 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:59:10,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 02:59:10,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:59:10,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:59:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:59:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1475938720, now seen corresponding path program 2 times [2022-01-11 02:59:10,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:59:10,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404313293] [2022-01-11 02:59:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:10,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:59:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-11 02:59:11,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:59:11,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404313293] [2022-01-11 02:59:11,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404313293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:59:11,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352385604] [2022-01-11 02:59:11,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:59:11,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:59:11,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:59:11,037 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) [2022-01-11 02:59:11,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:59:11,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:59:11,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:59:11,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 02:59:11,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:59:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-11 02:59:11,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:59:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-11 02:59:11,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352385604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:59:11,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:59:11,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-11 02:59:11,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820508476] [2022-01-11 02:59:11,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:59:11,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-11 02:59:11,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:59:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-11 02:59:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-11 02:59:11,442 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2022-01-11 02:59:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:59:12,417 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-01-11 02:59:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 02:59:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 15 [2022-01-11 02:59:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:59:12,418 INFO L225 Difference]: With dead ends: 53 [2022-01-11 02:59:12,418 INFO L226 Difference]: Without dead ends: 47 [2022-01-11 02:59:12,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-11 02:59:12,419 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-11 02:59:12,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 47 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-11 02:59:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-11 02:59:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 21. [2022-01-11 02:59:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:59:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-11 02:59:12,425 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2022-01-11 02:59:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:59:12,425 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-11 02:59:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2022-01-11 02:59:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-11 02:59:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-11 02:59:12,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:59:12,426 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:59:12,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 02:59:12,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:59:12,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:59:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:59:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1992709152, now seen corresponding path program 3 times [2022-01-11 02:59:12,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:59:12,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067681389] [2022-01-11 02:59:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:12,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:59:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 02:59:12,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:59:12,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067681389] [2022-01-11 02:59:12,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067681389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:59:12,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158175552] [2022-01-11 02:59:12,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:59:12,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:59:12,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:59:12,783 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) [2022-01-11 02:59:12,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:59:13,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-11 02:59:13,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:59:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-11 02:59:13,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:59:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 02:59:16,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:59:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 02:59:16,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158175552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:59:16,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:59:16,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-01-11 02:59:16,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805378648] [2022-01-11 02:59:16,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:59:16,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-11 02:59:16,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:59:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-11 02:59:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-11 02:59:16,591 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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) [2022-01-11 02:59:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:59:24,342 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-01-11 02:59:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-11 02:59:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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) Word has length 19 [2022-01-11 02:59:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:59:24,344 INFO L225 Difference]: With dead ends: 50 [2022-01-11 02:59:24,344 INFO L226 Difference]: Without dead ends: 36 [2022-01-11 02:59:24,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-01-11 02:59:24,345 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:59:24,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 57 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 91 Invalid, 0 Unknown, 8 Unchecked, 1.2s Time] [2022-01-11 02:59:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-11 02:59:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-01-11 02:59:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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) [2022-01-11 02:59:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-11 02:59:24,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2022-01-11 02:59:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:59:24,350 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-11 02:59:24,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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) [2022-01-11 02:59:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-11 02:59:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 02:59:24,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:59:24,351 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:59:24,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:59:24,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:59:24,562 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:59:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:59:24,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1404405577, now seen corresponding path program 4 times [2022-01-11 02:59:24,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:59:24,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814907568] [2022-01-11 02:59:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:59:24,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:59:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:59:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-11 02:59:24,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:59:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814907568] [2022-01-11 02:59:24,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814907568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:59:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808702250] [2022-01-11 02:59:24,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 02:59:24,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:59:24,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:59:24,809 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) [2022-01-11 02:59:24,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:59:27,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 02:59:27,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:59:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-11 02:59:27,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:59:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 02:59:27,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:00:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 44 refuted. 1 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 03:00:02,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808702250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:00:02,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 03:00:02,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2022-01-11 03:00:02,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820408017] [2022-01-11 03:00:02,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 03:00:02,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-11 03:00:02,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:00:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-11 03:00:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=580, Unknown=8, NotChecked=0, Total=812 [2022-01-11 03:00:02,959 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)