/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/array-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:19:36,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:19:36,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:19:36,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:19:36,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:19:36,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:19:36,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:19:36,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:19:36,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:19:36,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:19:36,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:19:36,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:19:36,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:19:36,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:19:36,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:19:36,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:19:36,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:19:36,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:19:36,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:19:36,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:19:36,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:19:36,951 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:19:36,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:19:36,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:19:36,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:19:36,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:19:36,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:19:36,953 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:19:36,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:19:36,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:19:36,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:19:36,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:19:36,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:19:36,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:19:36,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:19:36,954 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:19:36,954 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:19:36,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:19:36,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:19:36,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:19:36,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:19:36,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:19:36,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:19:36,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:19:36,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:19:36,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:19:36,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:19:36,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:19:36,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:19:36,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:19:36,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:19:36,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:19:36,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:19:36,958 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:19:36,958 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:19:37,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:19:37,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:19:37,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:19:37,208 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:19:37,211 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:19:37,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2022-01-10 21:19:37,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065d5825f/8148a064fbdd4a12ab52e77194fa6c24/FLAG760689045 [2022-01-10 21:19:37,655 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:19:37,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2022-01-10 21:19:37,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065d5825f/8148a064fbdd4a12ab52e77194fa6c24/FLAG760689045 [2022-01-10 21:19:38,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065d5825f/8148a064fbdd4a12ab52e77194fa6c24 [2022-01-10 21:19:38,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:19:38,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:19:38,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:19:38,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:19:38,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:19:38,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd37a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38, skipping insertion in model container [2022-01-10 21:19:38,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:19:38,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:19:38,280 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-programs/copysome1-1.i[806,819] [2022-01-10 21:19:38,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:19:38,329 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:19:38,345 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-programs/copysome1-1.i[806,819] [2022-01-10 21:19:38,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:19:38,367 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:19:38,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38 WrapperNode [2022-01-10 21:19:38,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:19:38,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:19:38,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:19:38,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:19:38,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,408 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-01-10 21:19:38,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:19:38,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:19:38,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:19:38,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:19:38,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:19:38,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:19:38,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:19:38,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:19:38,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:19:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:19:38,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 21:19:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:19:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:19:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 21:19:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 21:19:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:19:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:19:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 21:19:38,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 21:19:38,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 21:19:38,580 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:19:38,581 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:19:38,794 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:19:38,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:19:38,799 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 21:19:38,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:19:38 BoogieIcfgContainer [2022-01-10 21:19:38,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:19:38,801 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:19:38,801 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:19:38,816 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:19:38,818 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:19:38" (1/1) ... [2022-01-10 21:19:38,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:19:38 BasicIcfg [2022-01-10 21:19:38,910 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:19:38,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:19:38,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:19:38,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:19:38,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:19:38" (1/4) ... [2022-01-10 21:19:38,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4b6ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:19:38, skipping insertion in model container [2022-01-10 21:19:38,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:19:38" (2/4) ... [2022-01-10 21:19:38,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4b6ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:19:38, skipping insertion in model container [2022-01-10 21:19:38,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:19:38" (3/4) ... [2022-01-10 21:19:38,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4b6ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:19:38, skipping insertion in model container [2022-01-10 21:19:38,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:19:38" (4/4) ... [2022-01-10 21:19:38,918 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-1.iTransformedIcfg [2022-01-10 21:19:38,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:19:38,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:19:38,978 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:19:38,984 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 21:19:38,984 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:19:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 21:19:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 21:19:39,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:19:39,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:19:39,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:19:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:19:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1887403375, now seen corresponding path program 1 times [2022-01-10 21:19:39,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:19:39,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32796165] [2022-01-10 21:19:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:39,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:19:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:19:39,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:19:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32796165] [2022-01-10 21:19:39,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32796165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:19:39,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:19:39,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:19:39,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214887321] [2022-01-10 21:19:39,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:19:39,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:19:39,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:19:39,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:19:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:19:39,231 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 21:19:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:19:39,244 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-01-10 21:19:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:19:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 21:19:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:19:39,251 INFO L225 Difference]: With dead ends: 36 [2022-01-10 21:19:39,251 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 21:19:39,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:19:39,256 INFO L933 BasicCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:19:39,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:19:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 21:19:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 21:19:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:19:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-01-10 21:19:39,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-01-10 21:19:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:19:39,288 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-01-10 21:19:39,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 21:19:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-01-10 21:19:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 21:19:39,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:19:39,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:19:39,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:19:39,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:19:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:19:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash -636124435, now seen corresponding path program 1 times [2022-01-10 21:19:39,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:19:39,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150118361] [2022-01-10 21:19:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:39,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:19:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:19:39,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:19:39,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150118361] [2022-01-10 21:19:39,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150118361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:19:39,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:19:39,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:19:39,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246573889] [2022-01-10 21:19:39,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:19:39,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:19:39,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:19:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:19:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:19:39,442 INFO L87 Difference]: Start difference. First operand 16 states and 20 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 21:19:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:19:39,510 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-01-10 21:19:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:19:39,512 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 21:19:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:19:39,513 INFO L225 Difference]: With dead ends: 33 [2022-01-10 21:19:39,513 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 21:19:39,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:19:39,514 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:19:39,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:19:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 21:19:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-01-10 21:19:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:19:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 21:19:39,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2022-01-10 21:19:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:19:39,522 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 21:19:39,523 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 21:19:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 21:19:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 21:19:39,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:19:39,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:19:39,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:19:39,529 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:19:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:19:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash -740998732, now seen corresponding path program 1 times [2022-01-10 21:19:39,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:19:39,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082607957] [2022-01-10 21:19:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:39,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:19:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:19:39,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:19:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082607957] [2022-01-10 21:19:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082607957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:19:39,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:19:39,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:19:39,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128540000] [2022-01-10 21:19:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:19:39,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:19:39,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:19:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:19:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:19:39,660 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 21:19:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:19:39,713 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-01-10 21:19:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:19:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 21:19:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:19:39,715 INFO L225 Difference]: With dead ends: 32 [2022-01-10 21:19:39,716 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 21:19:39,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:19:39,722 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:19:39,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:19:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 21:19:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-01-10 21:19:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:19:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 21:19:39,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2022-01-10 21:19:39,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:19:39,732 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 21:19:39,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 21:19:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 21:19:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 21:19:39,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:19:39,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:19:39,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:19:39,734 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:19:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:19:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1811158229, now seen corresponding path program 1 times [2022-01-10 21:19:39,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:19:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524560917] [2022-01-10 21:19:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:39,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:19:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:19:39,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:19:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524560917] [2022-01-10 21:19:39,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524560917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:19:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485675428] [2022-01-10 21:19:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:39,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:19:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:19:39,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:19:39,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:19:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 21:19:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:19:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:19:40,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:19:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:19:40,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485675428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:19:40,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:19:40,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 21:19:40,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132087521] [2022-01-10 21:19:40,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:19:40,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 21:19:40,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:19:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 21:19:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:19:40,249 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:19:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:19:40,441 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-01-10 21:19:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 21:19:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) Word has length 15 [2022-01-10 21:19:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:19:40,442 INFO L225 Difference]: With dead ends: 47 [2022-01-10 21:19:40,442 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 21:19:40,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 21:19:40,444 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:19:40,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 21:19:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 21:19:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 21:19:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:19:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-10 21:19:40,455 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 15 [2022-01-10 21:19:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:19:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-10 21:19:40,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:19:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-10 21:19:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 21:19:40,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:19:40,457 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:19:40,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:19:40,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:19:40,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:19:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:19:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash -188332364, now seen corresponding path program 1 times [2022-01-10 21:19:40,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:19:40,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938009375] [2022-01-10 21:19:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:40,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:19:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 21:19:40,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:19:40,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938009375] [2022-01-10 21:19:40,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938009375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:19:40,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503760502] [2022-01-10 21:19:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:40,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:19:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:19:40,790 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:19:40,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 21:19:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:19:40,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:19:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 21:19:41,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:19:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 21:19:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503760502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:19:41,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:19:41,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-10 21:19:41,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569836869] [2022-01-10 21:19:41,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:19:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 21:19:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:19:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 21:19:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-10 21:19:41,127 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:19:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:19:41,287 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-01-10 21:19:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 21:19:41,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 30 [2022-01-10 21:19:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:19:41,289 INFO L225 Difference]: With dead ends: 53 [2022-01-10 21:19:41,289 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 21:19:41,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-10 21:19:41,290 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:19:41,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:19:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 21:19:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-10 21:19:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2022-01-10 21:19:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-10 21:19:41,297 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2022-01-10 21:19:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:19:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-10 21:19:41,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:19:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-10 21:19:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 21:19:41,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:19:41,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:19:41,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 21:19:41,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:19:41,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:19:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:19:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash 371367285, now seen corresponding path program 2 times [2022-01-10 21:19:41,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:19:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429636034] [2022-01-10 21:19:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:19:41,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:19:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:19:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 21:19:41,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:19:41,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429636034] [2022-01-10 21:19:41,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429636034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:19:41,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044415751] [2022-01-10 21:19:41,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:19:41,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:19:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:19:41,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:19:41,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 21:19:42,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:19:42,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:19:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 21:19:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:19:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:19:43,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:19:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:19:45,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044415751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:19:45,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:19:45,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-10 21:19:45,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678052250] [2022-01-10 21:19:45,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:19:45,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 21:19:45,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:19:45,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 21:19:45,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 21:19:45,536 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:19:54,870 WARN L228 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 21:20:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:20:17,269 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2022-01-10 21:20:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 21:20:17,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 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 30 [2022-01-10 21:20:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:20:17,270 INFO L225 Difference]: With dead ends: 89 [2022-01-10 21:20:17,270 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 21:20:17,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=198, Invalid=350, Unknown=4, NotChecked=0, Total=552 [2022-01-10 21:20:17,272 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:20:17,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 64 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 83 Invalid, 0 Unknown, 24 Unchecked, 0.6s Time] [2022-01-10 21:20:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 21:20:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-10 21:20:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:20:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2022-01-10 21:20:17,284 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 30 [2022-01-10 21:20:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:20:17,284 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2022-01-10 21:20:17,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:20:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2022-01-10 21:20:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 21:20:17,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:20:17,285 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:20:17,294 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 21:20:17,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:20:17,487 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:20:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:20:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2408106, now seen corresponding path program 2 times [2022-01-10 21:20:17,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:20:17,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437606483] [2022-01-10 21:20:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:20:17,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:20:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:20:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 65 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 21:20:17,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:20:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437606483] [2022-01-10 21:20:17,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437606483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:20:17,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774855619] [2022-01-10 21:20:17,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:20:17,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:20:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:20:17,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:20:17,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 21:20:17,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:20:17,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:20:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 21:20:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:20:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 21:20:18,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:20:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 21:20:18,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774855619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:20:18,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:20:18,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-01-10 21:20:18,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384715881] [2022-01-10 21:20:18,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:20:18,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 21:20:18,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:20:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 21:20:18,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-10 21:20:18,192 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:20:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:20:18,961 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-01-10 21:20:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 21:20:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-10 21:20:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:20:18,964 INFO L225 Difference]: With dead ends: 105 [2022-01-10 21:20:18,964 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 21:20:18,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-01-10 21:20:18,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:20:18,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 21:20:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 21:20:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-01-10 21:20:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:20:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-01-10 21:20:18,980 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 47 [2022-01-10 21:20:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:20:18,981 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-01-10 21:20:18,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:20:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-01-10 21:20:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 21:20:18,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:20:18,982 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:20:19,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 21:20:19,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:20:19,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:20:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:20:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash -826019379, now seen corresponding path program 3 times [2022-01-10 21:20:19,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:20:19,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990871401] [2022-01-10 21:20:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:20:19,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:20:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:20:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-10 21:20:19,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:20:19,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990871401] [2022-01-10 21:20:19,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990871401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:20:19,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212391393] [2022-01-10 21:20:19,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:20:19,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:20:19,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:20:19,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:20:19,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 21:20:22,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 21:20:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:20:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-10 21:20:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:20:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-10 21:20:22,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:20:41,137 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| 1))) (let ((.cse5 (mod .cse4 4294967296))) (let ((.cse3 (+ (mod (+ 1 .cse5) 4294967296) 1))) (let ((.cse2 (mod .cse3 4294967296)) (.cse0 (* 2 (mod 200000 2147483648)))) (or (not (< (+ 200000 (* 2 (mod |c_ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| 2147483648))) (+ |c_ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| .cse0))) (let ((.cse1 (+ .cse2 1))) (< (+ (* (mod .cse1 2147483648) 2) 200000) (+ (mod .cse1 4294967296) .cse0))) (<= (+ .cse0 .cse2) (+ 200000 (* (mod .cse3 2147483648) 2))) (= |c_ULTIMATE.start_ULTIMATE.start_main_~z~0#1Int| 1) (not (< (+ (* 2 (mod .cse4 2147483648)) 200000) (+ .cse0 .cse5)))))))) is different from true [2022-01-10 21:20:49,923 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| 1))) (let ((.cse7 (mod .cse6 4294967296))) (let ((.cse3 (+ 1 .cse7))) (let ((.cse4 (mod .cse3 4294967296))) (let ((.cse2 (+ (mod (+ .cse4 1) 4294967296) 1))) (let ((.cse0 (mod .cse2 4294967296)) (.cse1 (* 2 (mod 200000 2147483648)))) (or (<= (+ .cse0 .cse1) (+ (* (mod .cse2 2147483648) 2) 200000)) (= |c_ULTIMATE.start_ULTIMATE.start_main_~z~0#1Int| 1) (not (< (+ 200000 (* 2 (mod .cse3 2147483648))) (+ .cse4 .cse1))) (let ((.cse5 (+ .cse0 1))) (< (+ 200000 (* 2 (mod .cse5 2147483648))) (+ .cse1 (mod .cse5 4294967296)))) (not (< (+ (* 2 (mod .cse6 2147483648)) 200000) (+ .cse1 .cse7)))))))))) is different from true