/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_BITWISE.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 09:31:29,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 09:31:29,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 09:31:29,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 09:31:29,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 09:31:29,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 09:31:29,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 09:31:29,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 09:31:29,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 09:31:29,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 09:31:29,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 09:31:29,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 09:31:29,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 09:31:29,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 09:31:29,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 09:31:29,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 09:31:29,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 09:31:29,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 09:31:29,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 09:31:29,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 09:31:29,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 09:31:29,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 09:31:29,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 09:31:29,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 09:31:29,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 09:31:29,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 09:31:29,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 09:31:29,137 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 09:31:29,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:31:29,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 09:31:29,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 09:31:29,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 09:31:29,139 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 09:31:29,139 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 09:31:29,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 09:31:29,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 09:31:29,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 09:31:29,142 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 09:31:29,142 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 09:31:29,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 09:31:29,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 09:31:29,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 09:31:29,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 09:31:29,310 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 09:31:29,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2022-01-10 09:31:29,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca3bf3b2c/4e801bc1189149d8bc048c6e774f1450/FLAG347033d78 [2022-01-10 09:31:29,682 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 09:31:29,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2022-01-10 09:31:29,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca3bf3b2c/4e801bc1189149d8bc048c6e774f1450/FLAG347033d78 [2022-01-10 09:31:29,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca3bf3b2c/4e801bc1189149d8bc048c6e774f1450 [2022-01-10 09:31:29,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 09:31:29,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 09:31:29,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 09:31:29,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 09:31:29,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 09:31:29,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4313210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29, skipping insertion in model container [2022-01-10 09:31:29,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 09:31:29,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 09:31:29,826 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_04.i[814,827] [2022-01-10 09:31:29,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:31:29,840 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 09:31:29,847 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_04.i[814,827] [2022-01-10 09:31:29,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:31:29,863 INFO L208 MainTranslator]: Completed translation [2022-01-10 09:31:29,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29 WrapperNode [2022-01-10 09:31:29,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 09:31:29,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 09:31:29,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 09:31:29,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 09:31:29,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,883 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-01-10 09:31:29,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 09:31:29,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 09:31:29,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 09:31:29,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 09:31:29,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 09:31:29,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 09:31:29,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 09:31:29,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 09:31:29,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (1/1) ... [2022-01-10 09:31:29,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:31:29,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:31:29,926 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 09:31:29,934 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 09:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 09:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 09:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 09:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 09:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 09:31:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 09:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 09:31:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 09:31:29,997 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 09:31:29,998 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 09:31:30,089 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 09:31:30,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 09:31:30,093 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 09:31:30,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:31:30 BoogieIcfgContainer [2022-01-10 09:31:30,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 09:31:30,095 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 09:31:30,095 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 09:31:30,096 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 09:31:30,097 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:31:30" (1/1) ... [2022-01-10 09:31:30,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:31:30 BasicIcfg [2022-01-10 09:31:30,184 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 09:31:30,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 09:31:30,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 09:31:30,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 09:31:30,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:31:29" (1/4) ... [2022-01-10 09:31:30,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369e1f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:31:30, skipping insertion in model container [2022-01-10 09:31:30,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:31:29" (2/4) ... [2022-01-10 09:31:30,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369e1f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:31:30, skipping insertion in model container [2022-01-10 09:31:30,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:31:30" (3/4) ... [2022-01-10 09:31:30,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369e1f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:31:30, skipping insertion in model container [2022-01-10 09:31:30,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:31:30" (4/4) ... [2022-01-10 09:31:30,189 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.iTransformedIcfg [2022-01-10 09:31:30,192 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 09:31:30,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 09:31:30,242 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 09:31:30,248 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 09:31:30,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 09:31:30,263 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) [2022-01-10 09:31:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 09:31:30,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:31:30,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:31:30,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:31:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:31:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1184970882, now seen corresponding path program 1 times [2022-01-10 09:31:30,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:31:30,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689515948] [2022-01-10 09:31:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:31:30,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:31:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:31:30,417 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 09:31:30,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:31:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689515948] [2022-01-10 09:31:30,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689515948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:31:30,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:31:30,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 09:31:30,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581349596] [2022-01-10 09:31:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:31:30,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 09:31:30,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:31:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 09:31:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:31:30,450 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) [2022-01-10 09:31:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:31:30,468 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-01-10 09:31:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 09:31:30,472 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 09:31:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:31:30,476 INFO L225 Difference]: With dead ends: 27 [2022-01-10 09:31:30,477 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 09:31:30,478 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 09:31:30,480 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 [2022-01-10 09:31:30,481 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] [2022-01-10 09:31:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 09:31:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 09:31:30,499 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) [2022-01-10 09:31:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-01-10 09:31:30,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2022-01-10 09:31:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:31:30,500 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-01-10 09:31:30,500 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 09:31:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-01-10 09:31:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 09:31:30,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:31:30,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:31:30,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 09:31:30,501 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:31:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:31:30,502 INFO L85 PathProgramCache]: Analyzing trace with hash -296543680, now seen corresponding path program 1 times [2022-01-10 09:31:30,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:31:30,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613472294] [2022-01-10 09:31:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:31:30,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:31:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:31:30,610 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 09:31:30,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:31:30,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613472294] [2022-01-10 09:31:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613472294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:31:30,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:31:30,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:31:30,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009320786] [2022-01-10 09:31:30,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:31:30,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:31:30,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:31:30,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:31:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:31:30,613 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) [2022-01-10 09:31:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:31:30,634 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-01-10 09:31:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:31:30,635 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 09:31:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:31:30,635 INFO L225 Difference]: With dead ends: 20 [2022-01-10 09:31:30,635 INFO L226 Difference]: Without dead ends: 12 [2022-01-10 09:31:30,636 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 09:31:30,637 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 [2022-01-10 09:31:30,637 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] [2022-01-10 09:31:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-10 09:31:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-10 09:31:30,639 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) [2022-01-10 09:31:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-01-10 09:31:30,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-01-10 09:31:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:31:30,640 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-01-10 09:31:30,640 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 09:31:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-01-10 09:31:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 09:31:30,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:31:30,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:31:30,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 09:31:30,641 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:31:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:31:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash -694313175, now seen corresponding path program 1 times [2022-01-10 09:31:30,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:31:30,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600889232] [2022-01-10 09:31:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:31:30,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:31:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:31:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:31:30,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:31:30,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600889232] [2022-01-10 09:31:30,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600889232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:31:30,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:31:30,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:31:30,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301550810] [2022-01-10 09:31:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:31:30,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:31:30,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:31:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:31:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:31:30,736 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) [2022-01-10 09:31:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:31:30,790 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-01-10 09:31:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:31:30,791 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 [2022-01-10 09:31:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:31:30,791 INFO L225 Difference]: With dead ends: 24 [2022-01-10 09:31:30,792 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 09:31:30,792 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 09:31:30,793 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:31:30,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:31:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 09:31:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-01-10 09:31:30,797 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) [2022-01-10 09:31:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-01-10 09:31:30,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-01-10 09:31:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:31:30,797 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-01-10 09:31:30,797 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) [2022-01-10 09:31:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-01-10 09:31:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 09:31:30,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:31:30,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:31:30,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 09:31:30,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:31:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:31:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash -22181152, now seen corresponding path program 1 times [2022-01-10 09:31:30,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:31:30,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077025191] [2022-01-10 09:31:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:31:30,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:31:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:31:30,918 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 09:31:30,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:31:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077025191] [2022-01-10 09:31:30,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077025191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:31:30,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102748741] [2022-01-10 09:31:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:31:30,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:31:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:31:30,921 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 09:31:30,923 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 09:31:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:31:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 09:31:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:31:31,197 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 09:31:31,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:31:31,243 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 09:31:31,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102748741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:31:31,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:31:31,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 09:31:31,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137128470] [2022-01-10 09:31:31,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:31:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 09:31:31,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:31:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 09:31:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 09:31:31,248 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) [2022-01-10 09:31:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:31:31,439 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-01-10 09:31:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 09:31:31,440 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 [2022-01-10 09:31:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:31:31,441 INFO L225 Difference]: With dead ends: 36 [2022-01-10 09:31:31,441 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 09:31:31,441 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 [2022-01-10 09:31:31,442 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 [2022-01-10 09:31:31,442 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] [2022-01-10 09:31:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 09:31:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-01-10 09:31:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:31:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-10 09:31:31,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-10 09:31:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:31:31,446 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-10 09:31:31,446 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) [2022-01-10 09:31:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-10 09:31:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 09:31:31,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:31:31,447 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:31:31,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 09:31:31,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:31:31,656 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:31:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:31:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1475938720, now seen corresponding path program 2 times [2022-01-10 09:31:31,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:31:31,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050247928] [2022-01-10 09:31:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:31:31,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:31:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:31:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 09:31:31,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:31:31,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050247928] [2022-01-10 09:31:31,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050247928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:31:31,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629845649] [2022-01-10 09:31:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 09:31:31,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:31:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:31:31,808 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 09:31:31,810 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 09:31:32,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 09:31:32,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:31:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 09:31:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:31:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 09:31:32,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:31:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 09:31:32,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629845649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:31:32,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:31:32,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-10 09:31:32,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028643643] [2022-01-10 09:31:32,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:31:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 09:31:32,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:31:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 09:31:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-10 09:31:32,278 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) [2022-01-10 09:31:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:31:33,261 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-01-10 09:31:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 09:31:33,262 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 [2022-01-10 09:31:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:31:33,262 INFO L225 Difference]: With dead ends: 53 [2022-01-10 09:31:33,262 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 09:31:33,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-10 09:31:33,263 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 [2022-01-10 09:31:33,264 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] [2022-01-10 09:31:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 09:31:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 21. [2022-01-10 09:31:33,268 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) [2022-01-10 09:31:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-10 09:31:33,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2022-01-10 09:31:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:31:33,268 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-10 09:31:33,268 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) [2022-01-10 09:31:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-10 09:31:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 09:31:33,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:31:33,269 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:31:33,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 09:31:33,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:31:33,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:31:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:31:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1992709152, now seen corresponding path program 3 times [2022-01-10 09:31:33,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:31:33,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858514230] [2022-01-10 09:31:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:31:33,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:31:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:31:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 09:31:33,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:31:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858514230] [2022-01-10 09:31:33,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858514230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:31:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755957484] [2022-01-10 09:31:33,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 09:31:33,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:31:33,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:31:33,638 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 09:31:33,644 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 09:31:34,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 09:31:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:31:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 09:31:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:31:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 09:31:34,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:31:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 09:31:36,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755957484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:31:36,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:31:36,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-01-10 09:31:36,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14187495] [2022-01-10 09:31:36,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:31:36,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 09:31:36,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:31:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 09:31:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-01-10 09:31:36,458 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2022-01-10 09:31:56,079 WARN L228 SmtUtils]: Spent 18.96s on a formula simplification. DAG size of input: 56 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 09:32:10,714 WARN L228 SmtUtils]: Spent 9.41s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 09:32:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:32:12,188 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-01-10 09:32:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 09:32:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) Word has length 19 [2022-01-10 09:32:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:32:12,190 INFO L225 Difference]: With dead ends: 52 [2022-01-10 09:32:12,190 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 09:32:12,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2022-01-10 09:32:12,193 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 09:32:12,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 58 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 09:32:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 09:32:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-01-10 09:32:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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 09:32:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-10 09:32:12,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2022-01-10 09:32:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:32:12,201 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-10 09:32:12,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2022-01-10 09:32:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-10 09:32:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 09:32:12,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:32:12,202 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:32:12,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 09:32:12,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:32:12,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:32:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:32:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 307589952, now seen corresponding path program 4 times [2022-01-10 09:32:12,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:32:12,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723209884] [2022-01-10 09:32:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:32:12,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:32:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:32:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 09:32:12,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:32:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723209884] [2022-01-10 09:32:12,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723209884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:32:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225362455] [2022-01-10 09:32:12,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 09:32:12,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:32:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:32:12,634 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 09:32:12,635 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 09:32:18,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 09:32:18,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:32:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 09:32:18,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:32:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 09:32:18,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:32:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 09:32:23,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225362455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:32:23,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:32:23,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-10 09:32:23,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145445957] [2022-01-10 09:32:23,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:32:23,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 09:32:23,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:32:23,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 09:32:23,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2022-01-10 09:32:23,778 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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 09:32:43,365 WARN L228 SmtUtils]: Spent 16.81s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)