/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:22:02,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:22:02,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:22:02,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 18:22:02,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:22:02,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:22:02,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:22:02,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:22:02,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:22:02,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:22:02,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:22:02,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:22:02,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:22:02,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:22:02,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:22:02,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:22:02,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 18:22:02,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:22:02,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:22:02,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:22:02,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:22:02,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:22:02,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:22:02,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:22:02,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:22:02,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:22:02,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:22:02,411 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:22:02,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:22:02,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:22:02,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:22:02,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:22:02,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:22:02,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:22:02,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:22:02,412 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:22:02,412 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:22:02,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:22:02,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:22:02,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:22:02,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:22:02,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:22:02,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:22:02,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:22:02,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:22:02,415 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:22:02,415 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:22:02,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:22:02,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:22:02,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:22:02,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:22:02,627 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:22:02,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2022-01-10 18:22:02,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61277773c/6a4ecbd197134078aa0e6696a4d0c14a/FLAGd469e32b5 [2022-01-10 18:22:02,978 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:22:02,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2022-01-10 18:22:02,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61277773c/6a4ecbd197134078aa0e6696a4d0c14a/FLAGd469e32b5 [2022-01-10 18:22:03,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61277773c/6a4ecbd197134078aa0e6696a4d0c14a [2022-01-10 18:22:03,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:22:03,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:22:03,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:03,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:22:03,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:22:03,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6524fa2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03, skipping insertion in model container [2022-01-10 18:22:03,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:22:03,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:22:03,547 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c[951,964] [2022-01-10 18:22:03,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:03,559 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:22:03,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c[951,964] [2022-01-10 18:22:03,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:03,575 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:22:03,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03 WrapperNode [2022-01-10 18:22:03,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:03,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:03,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:22:03,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:22:03,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,597 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 18:22:03,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:03,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:22:03,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:22:03,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:22:03,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:22:03,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:22:03,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:22:03,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:22:03,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:22:03,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:03,638 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 18:22:03,642 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 18:22:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:22:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:22:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 18:22:03,670 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 18:22:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 18:22:03,670 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 18:22:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:22:03,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:22:03,716 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:22:03,718 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:22:03,831 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:22:03,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:22:03,835 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:22:03,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:03 BoogieIcfgContainer [2022-01-10 18:22:03,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:22:03,837 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:22:03,837 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:22:03,840 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:22:03,842 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:03" (1/1) ... [2022-01-10 18:22:03,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:22:03 BasicIcfg [2022-01-10 18:22:03,940 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:22:03,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:22:03,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:22:03,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:22:03,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:22:03" (1/4) ... [2022-01-10 18:22:03,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa8aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:22:03, skipping insertion in model container [2022-01-10 18:22:03,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:03" (2/4) ... [2022-01-10 18:22:03,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa8aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:22:03, skipping insertion in model container [2022-01-10 18:22:03,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:03" (3/4) ... [2022-01-10 18:22:03,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa8aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:22:03, skipping insertion in model container [2022-01-10 18:22:03,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:22:03" (4/4) ... [2022-01-10 18:22:03,956 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.cTransformedIcfg [2022-01-10 18:22:03,961 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:22:03,961 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:22:04,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:22:04,015 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 18:22:04,015 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:22:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 18:22:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:22:04,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:04,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:04,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-10 18:22:04,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752501337] [2022-01-10 18:22:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:04,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,241 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 18:22:04,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:04,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752501337] [2022-01-10 18:22:04,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752501337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:04,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:22:04,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:22:04,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888889770] [2022-01-10 18:22:04,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:04,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:22:04,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:04,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:22:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:22:04,271 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:04,314 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-10 18:22:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:22:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:22:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:04,321 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:22:04,321 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 18:22:04,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:22:04,329 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:04,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 118 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:22:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 18:22:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 18:22:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 18:22:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:22:04,360 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 18:22:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:04,361 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:22:04,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:22:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:22:04,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:04,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:04,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:22:04,364 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-10 18:22:04,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:04,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575658043] [2022-01-10 18:22:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:04,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,449 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 18:22:04,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:04,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575658043] [2022-01-10 18:22:04,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575658043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:04,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:22:04,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:22:04,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906029995] [2022-01-10 18:22:04,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:04,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:22:04,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:22:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:22:04,452 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:04,518 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 18:22:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:22:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 18:22:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:04,520 INFO L225 Difference]: With dead ends: 31 [2022-01-10 18:22:04,520 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 18:22:04,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:22:04,525 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:04,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:22:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 18:22:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 18:22:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 18:22:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:22:04,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 18:22:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:04,548 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:22:04,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:22:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:22:04,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:04,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:04,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:22:04,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-10 18:22:04,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:04,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421219621] [2022-01-10 18:22:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:04,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:04,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:04,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421219621] [2022-01-10 18:22:04,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421219621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:04,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120816329] [2022-01-10 18:22:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:04,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:04,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:04,847 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 18:22:04,848 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 18:22:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:04,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:22:04,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:22:05,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:22:05,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120816329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:05,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:22:05,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-01-10 18:22:05,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576885429] [2022-01-10 18:22:05,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:05,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:22:05,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:22:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:22:05,167 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:22:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:05,200 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-01-10 18:22:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:22:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-10 18:22:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:05,201 INFO L225 Difference]: With dead ends: 38 [2022-01-10 18:22:05,201 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 18:22:05,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:22:05,202 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:05,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:22:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 18:22:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-10 18:22:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 18:22:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 18:22:05,207 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-10 18:22:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:05,208 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 18:22:05,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:22:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 18:22:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 18:22:05,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:05,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:05,229 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 18:22:05,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:05,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1726490069, now seen corresponding path program 1 times [2022-01-10 18:22:05,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:05,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888384531] [2022-01-10 18:22:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:05,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:05,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:05,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888384531] [2022-01-10 18:22:05,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888384531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:05,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:22:05,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:22:05,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166834456] [2022-01-10 18:22:05,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:05,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:22:05,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:22:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:22:05,494 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:22:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:05,567 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-01-10 18:22:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:22:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-10 18:22:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:05,569 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:22:05,569 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 18:22:05,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 18:22:05,570 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:05,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:22:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 18:22:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-10 18:22:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-10 18:22:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2022-01-10 18:22:05,576 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 23 [2022-01-10 18:22:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:05,576 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2022-01-10 18:22:05,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:22:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2022-01-10 18:22:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 18:22:05,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:05,577 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:05,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:22:05,577 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash -312577904, now seen corresponding path program 1 times [2022-01-10 18:22:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:05,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659484067] [2022-01-10 18:22:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:05,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:22:05,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659484067] [2022-01-10 18:22:05,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659484067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:05,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079480773] [2022-01-10 18:22:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:05,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:05,925 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 18:22:05,926 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 18:22:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:05,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 18:22:05,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 18:22:06,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:22:06,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079480773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:06,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:22:06,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-01-10 18:22:06,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981153461] [2022-01-10 18:22:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:06,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 18:22:06,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 18:22:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:22:06,224 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:22:06,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:06,249 INFO L93 Difference]: Finished difference Result 50 states and 78 transitions. [2022-01-10 18:22:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 18:22:06,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-01-10 18:22:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:06,251 INFO L225 Difference]: With dead ends: 50 [2022-01-10 18:22:06,251 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 18:22:06,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:22:06,252 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:06,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 192 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:22:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 18:22:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-01-10 18:22:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-10 18:22:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2022-01-10 18:22:06,259 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 34 [2022-01-10 18:22:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:06,259 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2022-01-10 18:22:06,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:22:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2022-01-10 18:22:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:22:06,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:06,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:06,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 18:22:06,478 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 18:22:06,478 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash 176289166, now seen corresponding path program 1 times [2022-01-10 18:22:06,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:06,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859841030] [2022-01-10 18:22:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:06,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:06,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:06,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:06,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:06,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:22:06,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859841030] [2022-01-10 18:22:06,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859841030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595593209] [2022-01-10 18:22:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:06,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:06,844 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 18:22:06,895 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 18:22:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:22:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:22:07,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:22:07,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595593209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:07,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:07,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 22 [2022-01-10 18:22:07,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886008864] [2022-01-10 18:22:07,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:07,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 18:22:07,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 18:22:07,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:22:07,645 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 18:22:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:08,114 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2022-01-10 18:22:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 18:22:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 35 [2022-01-10 18:22:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:08,115 INFO L225 Difference]: With dead ends: 99 [2022-01-10 18:22:08,116 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 18:22:08,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-01-10 18:22:08,117 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:08,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 312 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:22:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 18:22:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-01-10 18:22:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (41), 15 states have call predecessors, (41), 9 states have call successors, (41) [2022-01-10 18:22:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 84 transitions. [2022-01-10 18:22:08,130 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 84 transitions. Word has length 35 [2022-01-10 18:22:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:08,130 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 84 transitions. [2022-01-10 18:22:08,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 18:22:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 84 transitions. [2022-01-10 18:22:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:22:08,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:08,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:08,162 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 18:22:08,359 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 18:22:08,360 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 2 times [2022-01-10 18:22:08,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:08,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145641538] [2022-01-10 18:22:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:08,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:08,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:08,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:08,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:08,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:22:08,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145641538] [2022-01-10 18:22:08,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145641538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244229506] [2022-01-10 18:22:08,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:22:08,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:08,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:08,528 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 18:22:08,529 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 18:22:08,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:22:08,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:22:08,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:22:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:22:08,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:22:09,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244229506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:09,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:09,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-10 18:22:09,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259812627] [2022-01-10 18:22:09,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:09,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 18:22:09,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 18:22:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-10 18:22:09,288 INFO L87 Difference]: Start difference. First operand 51 states and 84 transitions. Second operand has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 18:22:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:09,779 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2022-01-10 18:22:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:22:09,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 35 [2022-01-10 18:22:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:09,781 INFO L225 Difference]: With dead ends: 141 [2022-01-10 18:22:09,781 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 18:22:09,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:22:09,789 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:09,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 231 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:22:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 18:22:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-01-10 18:22:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (48), 18 states have call predecessors, (48), 11 states have call successors, (48) [2022-01-10 18:22:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2022-01-10 18:22:09,798 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 35 [2022-01-10 18:22:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:09,798 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2022-01-10 18:22:09,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 18:22:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2022-01-10 18:22:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:22:09,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:09,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:09,820 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 18:22:10,019 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 18:22:10,019 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:10,020 INFO L85 PathProgramCache]: Analyzing trace with hash 94684969, now seen corresponding path program 1 times [2022-01-10 18:22:10,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:10,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469497241] [2022-01-10 18:22:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:10,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:22:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:22:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:22:10,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469497241] [2022-01-10 18:22:10,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469497241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049285744] [2022-01-10 18:22:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:10,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:10,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:10,224 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 18:22:10,225 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 18:22:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:22:10,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:22:10,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 18:22:10,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049285744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:10,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:10,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-10 18:22:10,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443816038] [2022-01-10 18:22:10,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:10,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 18:22:10,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 18:22:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-10 18:22:10,924 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:22:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:11,263 INFO L93 Difference]: Finished difference Result 154 states and 294 transitions. [2022-01-10 18:22:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:22:11,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 47 [2022-01-10 18:22:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:11,265 INFO L225 Difference]: With dead ends: 154 [2022-01-10 18:22:11,265 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 18:22:11,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:22:11,267 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:11,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 237 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:22:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 18:22:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-01-10 18:22:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 14 states have call successors, (14), 5 states have call predecessors, (14), 17 states have return successors, (66), 23 states have call predecessors, (66), 14 states have call successors, (66) [2022-01-10 18:22:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 135 transitions. [2022-01-10 18:22:11,277 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 135 transitions. Word has length 47 [2022-01-10 18:22:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:11,277 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 135 transitions. [2022-01-10 18:22:11,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:22:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 135 transitions. [2022-01-10 18:22:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:22:11,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:11,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:11,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 18:22:11,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:11,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1359840148, now seen corresponding path program 1 times [2022-01-10 18:22:11,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:11,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112921312] [2022-01-10 18:22:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:11,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:22:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 18:22:11,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112921312] [2022-01-10 18:22:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112921312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812895693] [2022-01-10 18:22:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:11,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:11,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:22:11,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:22:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 18:22:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 18:22:12,226 INFO L328 TraceCheckSpWp]: Computing backward predicates...