/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:11:23,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:11:23,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:11:23,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 00:11:23,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:11:23,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:11:23,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:11:23,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:11:23,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:11:23,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:11:23,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:11:23,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:11:23,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:11:23,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:11:23,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:11:23,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:11:23,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 00:11:23,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:11:23,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:11:23,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:11:23,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:11:23,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:11:23,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:11:23,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:11:23,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:11:23,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:11:23,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:11:23,768 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:11:23,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:11:23,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:11:23,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:11:23,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:11:23,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:11:23,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:11:23,770 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:11:23,770 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:11:23,770 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:11:23,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:11:23,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:11:23,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:11:23,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:11:23,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:11:23,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:11:23,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:11:23,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:11:23,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:11:23,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:11:23,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:11:23,771 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:11:23,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:11:23,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:11:23,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:11:23,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:11:23,773 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:11:23,773 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:11:24,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:11:24,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:11:24,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:11:24,053 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:11:24,054 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:11:24,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2022-01-11 00:11:24,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6122c92/2f7f7c7994fe4dcdaf2acdd59e0580a1/FLAG528d6c158 [2022-01-11 00:11:24,540 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:11:24,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2022-01-11 00:11:24,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6122c92/2f7f7c7994fe4dcdaf2acdd59e0580a1/FLAG528d6c158 [2022-01-11 00:11:24,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e6122c92/2f7f7c7994fe4dcdaf2acdd59e0580a1 [2022-01-11 00:11:24,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:11:24,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:11:24,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:11:24,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:11:24,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:11:24,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:11:24" (1/1) ... [2022-01-11 00:11:24,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406ee65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:24, skipping insertion in model container [2022-01-11 00:11:24,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:11:24" (1/1) ... [2022-01-11 00:11:24,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:11:24,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:11:25,175 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_25-2.c[746,759] [2022-01-11 00:11:25,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:11:25,220 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:11:25,237 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_25-2.c[746,759] [2022-01-11 00:11:25,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:11:25,251 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:11:25,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25 WrapperNode [2022-01-11 00:11:25,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:11:25,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:11:25,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:11:25,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:11:25,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,282 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 00:11:25,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:11:25,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:11:25,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:11:25,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:11:25,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:11:25,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:11:25,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:11:25,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:11:25,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:11:25,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:25,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 00:11:25,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 00:11:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:11:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:11:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:11:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:11:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 00:11:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 00:11:25,450 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:11:25,451 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:11:25,574 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:11:25,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:11:25,582 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:11:25,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:11:25 BoogieIcfgContainer [2022-01-11 00:11:25,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:11:25,584 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:11:25,584 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:11:25,586 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:11:25,589 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:11:25" (1/1) ... [2022-01-11 00:11:25,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:11:25 BasicIcfg [2022-01-11 00:11:25,657 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:11:25,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:11:25,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:11:25,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:11:25,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:11:24" (1/4) ... [2022-01-11 00:11:25,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77d2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:11:25, skipping insertion in model container [2022-01-11 00:11:25,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:25" (2/4) ... [2022-01-11 00:11:25,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77d2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:11:25, skipping insertion in model container [2022-01-11 00:11:25,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:11:25" (3/4) ... [2022-01-11 00:11:25,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77d2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:11:25, skipping insertion in model container [2022-01-11 00:11:25,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:11:25" (4/4) ... [2022-01-11 00:11:25,668 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_25-2.cTransformedIcfg [2022-01-11 00:11:25,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:11:25,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:11:25,709 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:11:25,715 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 00:11:25,716 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:11:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 00:11:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:11:25,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:25,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:25,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 00:11:25,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:25,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638688674] [2022-01-11 00:11:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:25,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:11:26,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:26,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638688674] [2022-01-11 00:11:26,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638688674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:11:26,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:11:26,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:11:26,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091051141] [2022-01-11 00:11:26,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:11:26,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:11:26,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:11:26,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:11:26,150 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-01-11 00:11:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:26,272 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-11 00:11:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:11:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2022-01-11 00:11:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:26,280 INFO L225 Difference]: With dead ends: 29 [2022-01-11 00:11:26,280 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 00:11:26,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:11:26,287 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:26,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:11:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 00:11:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 00:11:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:11:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:11:26,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 00:11:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:26,320 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:11:26,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-01-11 00:11:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:11:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:11:26,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:26,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:26,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:11:26,323 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:26,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:26,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 00:11:26,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:26,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703578787] [2022-01-11 00:11:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:26,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:11:26,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:26,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703578787] [2022-01-11 00:11:26,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703578787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:11:26,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:11:26,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:11:26,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227776933] [2022-01-11 00:11:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:11:26,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:11:26,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:26,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:11:26,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:11:26,396 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2022-01-11 00:11:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:26,471 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 00:11:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:11:26,473 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 [2022-01-11 00:11:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:26,474 INFO L225 Difference]: With dead ends: 23 [2022-01-11 00:11:26,475 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 00:11:26,475 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 [2022-01-11 00:11:26,476 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:26,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:11:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 00:11:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 00:11:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:11:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:11:26,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 00:11:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:26,494 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:11:26,495 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) [2022-01-11 00:11:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:11:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:11:26,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:26,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:26,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:11:26,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 00:11:26,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:26,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173583329] [2022-01-11 00:11:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:26,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:11:26,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:26,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173583329] [2022-01-11 00:11:26,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173583329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:26,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769724436] [2022-01-11 00:11:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:26,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:26,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:26,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:26,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 00:11:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:11:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:11:27,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:11:28,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769724436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:28,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:28,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 00:11:28,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963043721] [2022-01-11 00:11:28,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:28,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 00:11:28,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 00:11:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 00:11:28,293 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 00:11:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:29,152 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-11 00:11:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:11:29,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 22 [2022-01-11 00:11:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:29,155 INFO L225 Difference]: With dead ends: 46 [2022-01-11 00:11:29,155 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 00:11:29,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-11 00:11:29,158 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:29,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-11 00:11:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 00:11:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 00:11:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 00:11:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-11 00:11:29,174 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-11 00:11:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:29,175 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-11 00:11:29,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 00:11:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-11 00:11:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 00:11:29,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:29,180 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:29,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 00:11:29,403 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 [2022-01-11 00:11:29,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-11 00:11:29,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169234271] [2022-01-11 00:11:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:29,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:29,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:29,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:11:29,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169234271] [2022-01-11 00:11:29,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169234271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:29,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699975312] [2022-01-11 00:11:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:29,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:29,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:29,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:29,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 00:11:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:11:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 00:11:29,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:11:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699975312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:30,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:30,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 00:11:30,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148604541] [2022-01-11 00:11:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:30,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 00:11:30,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 00:11:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 00:11:30,353 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:11:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:30,522 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-11 00:11:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:11:30,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 36 [2022-01-11 00:11:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:30,525 INFO L225 Difference]: With dead ends: 43 [2022-01-11 00:11:30,525 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 00:11:30,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:11:30,526 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:30,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:11:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 00:11:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-11 00:11:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-11 00:11:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-11 00:11:30,537 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-11 00:11:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-11 00:11:30,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:11:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-11 00:11:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 00:11:30,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:30,539 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:30,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 00:11:30,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-11 00:11:30,756 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-11 00:11:30,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:30,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974131904] [2022-01-11 00:11:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:30,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:30,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:30,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:30,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:31,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:31,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:31,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:11:31,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:31,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974131904] [2022-01-11 00:11:31,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974131904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:31,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479422787] [2022-01-11 00:11:31,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:11:31,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:31,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:31,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:31,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 00:11:31,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:11:31,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:11:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-11 00:11:31,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:11:31,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479422787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:31,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:31,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 00:11:31,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605645007] [2022-01-11 00:11:31,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:31,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 00:11:31,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:31,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 00:11:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 00:11:31,984 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:11:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:32,320 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-11 00:11:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:11:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2022-01-11 00:11:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:32,326 INFO L225 Difference]: With dead ends: 81 [2022-01-11 00:11:32,326 INFO L226 Difference]: Without dead ends: 55 [2022-01-11 00:11:32,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-11 00:11:32,328 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:32,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:11:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-11 00:11:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-11 00:11:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (43), 15 states have call predecessors, (43), 7 states have call successors, (43) [2022-01-11 00:11:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-11 00:11:32,344 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-11 00:11:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:32,344 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-11 00:11:32,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:11:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-11 00:11:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-11 00:11:32,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:32,348 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:32,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 00:11:32,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:32,560 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:32,560 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-11 00:11:32,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:32,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333216664] [2022-01-11 00:11:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:32,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:32,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:32,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:32,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:11:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:11:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:11:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:11:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 49 proven. 106 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-11 00:11:33,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:33,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333216664] [2022-01-11 00:11:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333216664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:33,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145748239] [2022-01-11 00:11:33,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:11:33,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:33,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:33,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:33,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 00:11:33,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:11:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 00:11:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 89 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-11 00:11:34,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-01-11 00:11:37,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145748239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:37,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:37,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-11 00:11:37,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531645766] [2022-01-11 00:11:37,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:37,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-11 00:11:37,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-11 00:11:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-11 00:11:37,457 INFO L87 Difference]: Start difference. First operand 49 states and 82 transitions. Second operand has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-11 00:11:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:38,044 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2022-01-11 00:11:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:11:38,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) Word has length 82 [2022-01-11 00:11:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:38,047 INFO L225 Difference]: With dead ends: 85 [2022-01-11 00:11:38,048 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 00:11:38,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-01-11 00:11:38,050 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:38,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 00:11:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 00:11:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-01-11 00:11:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 00:11:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-01-11 00:11:38,058 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 82 [2022-01-11 00:11:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:38,058 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-01-11 00:11:38,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-11 00:11:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-01-11 00:11:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 00:11:38,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:38,061 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:38,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 00:11:38,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:38,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1832080039, now seen corresponding path program 3 times [2022-01-11 00:11:38,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:38,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544536834] [2022-01-11 00:11:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:38,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 34 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:11:38,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544536834] [2022-01-11 00:11:38,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544536834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506971994] [2022-01-11 00:11:38,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:11:38,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:38,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:38,611 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) [2022-01-11 00:11:38,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 00:11:38,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 00:11:38,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:11:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 24 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-11 00:11:38,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:11:39,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506971994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:39,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:39,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-11 00:11:39,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385382160] [2022-01-11 00:11:39,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:39,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 00:11:39,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:39,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 00:11:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-11 00:11:39,365 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-11 00:11:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:39,699 INFO L93 Difference]: Finished difference Result 80 states and 128 transitions. [2022-01-11 00:11:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 00:11:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2022-01-11 00:11:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:39,703 INFO L225 Difference]: With dead ends: 80 [2022-01-11 00:11:39,703 INFO L226 Difference]: Without dead ends: 51 [2022-01-11 00:11:39,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-11 00:11:39,705 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:39,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 107 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:11:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-11 00:11:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-01-11 00:11:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 9 states have return successors, (25), 11 states have call predecessors, (25), 6 states have call successors, (25) [2022-01-11 00:11:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-01-11 00:11:39,715 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 61 [2022-01-11 00:11:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:39,715 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-01-11 00:11:39,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-11 00:11:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-01-11 00:11:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-11 00:11:39,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:39,720 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 19, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:39,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 00:11:39,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:39,936 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1914785645, now seen corresponding path program 4 times [2022-01-11 00:11:39,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071175363] [2022-01-11 00:11:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:39,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-11 00:11:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 95 proven. 298 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2022-01-11 00:11:40,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071175363] [2022-01-11 00:11:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071175363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:40,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742007906] [2022-01-11 00:11:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 00:11:40,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:40,638 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) [2022-01-11 00:11:40,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 00:11:40,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 00:11:40,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:40,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:11:40,885 INFO L286 TraceCheckSpWp]: Computing forward predicates...