/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:19:20,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:19:20,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:19:20,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 18:19:20,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:19:20,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:19:20,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:19:20,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:19:20,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:19:20,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:19:20,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:19:20,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:19:20,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:19:20,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:19:20,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:19:20,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:19:20,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:19:20,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:19:20,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:19:20,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:19:20,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:19:20,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:19:20,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:19:20,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:19:20,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:19:20,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:19:20,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:19:20,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:19:20,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:19:20,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:19:20,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:19:20,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:19:20,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:19:20,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:19:20,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:19:20,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:19:20,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:19:20,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:19:20,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:19:20,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:19:20,710 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:19:20,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:19:20,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:19:20,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:19:20,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:19:20,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:19:20,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:19:20,713 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:19:20,713 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:19:20,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:19:20,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:19:20,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:19:20,891 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:19:20,891 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:19:20,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2022-01-10 18:19:20,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b718ab077/634a618246ae4bbfb5c301e619788c66/FLAGb0435ee5f [2022-01-10 18:19:21,281 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:19:21,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2022-01-10 18:19:21,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b718ab077/634a618246ae4bbfb5c301e619788c66/FLAGb0435ee5f [2022-01-10 18:19:21,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b718ab077/634a618246ae4bbfb5c301e619788c66 [2022-01-10 18:19:21,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:19:21,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:19:21,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:19:21,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:19:21,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:19:21,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7438e00e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21, skipping insertion in model container [2022-01-10 18:19:21,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:19:21,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:19:21,858 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/Ackermann01-2.c[1234,1247] [2022-01-10 18:19:21,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:19:21,874 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:19:21,884 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/Ackermann01-2.c[1234,1247] [2022-01-10 18:19:21,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:19:21,893 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:19:21,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21 WrapperNode [2022-01-10 18:19:21,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:19:21,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:19:21,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:19:21,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:19:21,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,914 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-01-10 18:19:21,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:19:21,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:19:21,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:19:21,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:19:21,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:19:21,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:19:21,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:19:21,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:19:21,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (1/1) ... [2022-01-10 18:19:21,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:19:21,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:21,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 18:19:21,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 18:19:21,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:19:21,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:19:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:19:21,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:19:21,998 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-01-10 18:19:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-01-10 18:19:22,037 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:19:22,038 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:19:22,162 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:19:22,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:19:22,166 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:19:22,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:22 BoogieIcfgContainer [2022-01-10 18:19:22,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:19:22,168 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:19:22,168 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:19:22,169 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:19:22,177 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:22" (1/1) ... [2022-01-10 18:19:22,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:19:22 BasicIcfg [2022-01-10 18:19:22,224 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:19:22,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:19:22,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:19:22,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:19:22,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:19:21" (1/4) ... [2022-01-10 18:19:22,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417b7562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:22, skipping insertion in model container [2022-01-10 18:19:22,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:21" (2/4) ... [2022-01-10 18:19:22,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417b7562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:22, skipping insertion in model container [2022-01-10 18:19:22,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:22" (3/4) ... [2022-01-10 18:19:22,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417b7562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:19:22, skipping insertion in model container [2022-01-10 18:19:22,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:19:22" (4/4) ... [2022-01-10 18:19:22,229 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.cTransformedIcfg [2022-01-10 18:19:22,232 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:19:22,232 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:19:22,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:19:22,266 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:19:22,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:19:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 18:19:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 18:19:22,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:22,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:22,280 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1248781538, now seen corresponding path program 1 times [2022-01-10 18:19:22,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:22,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820187303] [2022-01-10 18:19:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:22,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:22,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:19:22,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820187303] [2022-01-10 18:19:22,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820187303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:19:22,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:19:22,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:19:22,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610892912] [2022-01-10 18:19:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:19:22,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:19:22,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:19:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:19:22,612 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:19:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:22,769 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-01-10 18:19:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:19:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2022-01-10 18:19:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:22,782 INFO L225 Difference]: With dead ends: 37 [2022-01-10 18:19:22,783 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 18:19:22,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 18:19:22,788 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:22,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 86 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:19:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 18:19:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 18:19:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 18:19:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-01-10 18:19:22,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2022-01-10 18:19:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:22,813 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-01-10 18:19:22,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:19:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-01-10 18:19:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 18:19:22,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:22,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:22,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:19:22,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:22,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1675309908, now seen corresponding path program 1 times [2022-01-10 18:19:22,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:22,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239237413] [2022-01-10 18:19:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:22,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:22,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:19:23,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:23,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239237413] [2022-01-10 18:19:23,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239237413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:23,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750447443] [2022-01-10 18:19:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:23,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:23,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:23,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:19:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:23,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:19:23,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:19:23,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:19:23,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750447443] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:23,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 18:19:23,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 20 [2022-01-10 18:19:23,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187658341] [2022-01-10 18:19:23,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:19:23,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:19:23,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:19:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-10 18:19:23,466 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:19:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:23,618 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-01-10 18:19:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:19:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-10 18:19:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:23,626 INFO L225 Difference]: With dead ends: 28 [2022-01-10 18:19:23,626 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 18:19:23,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-10 18:19:23,628 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:23,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 72 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:19:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 18:19:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-01-10 18:19:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 18:19:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-10 18:19:23,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 19 [2022-01-10 18:19:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:23,640 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-10 18:19:23,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:19:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-10 18:19:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 18:19:23,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:23,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:23,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 18:19:23,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:23,864 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash 833345019, now seen corresponding path program 1 times [2022-01-10 18:19:23,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:23,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670694964] [2022-01-10 18:19:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:23,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:23,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:23,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:19:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:19:23,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:23,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670694964] [2022-01-10 18:19:23,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670694964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920507730] [2022-01-10 18:19:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:23,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:23,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:24,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:19:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 18:19:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:19:24,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:19:24,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920507730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:19:24,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:19:24,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-10 18:19:24,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234572843] [2022-01-10 18:19:24,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:19:24,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 18:19:24,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 18:19:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-10 18:19:24,172 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 18:19:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:24,221 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-01-10 18:19:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:19:24,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2022-01-10 18:19:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:24,222 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:19:24,222 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 18:19:24,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-10 18:19:24,226 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:24,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:19:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 18:19:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 18:19:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 18:19:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-01-10 18:19:24,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 24 [2022-01-10 18:19:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:24,235 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-01-10 18:19:24,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 18:19:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-01-10 18:19:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 18:19:24,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:24,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:24,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:24,454 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,SelfDestructingSolverStorable2 [2022-01-10 18:19:24,454 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash -360936899, now seen corresponding path program 1 times [2022-01-10 18:19:24,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:24,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709891105] [2022-01-10 18:19:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:24,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 18:19:24,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709891105] [2022-01-10 18:19:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709891105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293681653] [2022-01-10 18:19:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:24,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:24,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:24,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:19:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 18:19:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 18:19:25,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 18:19:26,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293681653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:26,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:26,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 30 [2022-01-10 18:19:26,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329024569] [2022-01-10 18:19:26,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:26,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 18:19:26,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:26,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 18:19:26,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-10 18:19:26,041 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 30 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 18 states have internal predecessors, (38), 4 states have call successors, (6), 1 states have call predecessors, (6), 10 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-10 18:19:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:27,328 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2022-01-10 18:19:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 18:19:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 18 states have internal predecessors, (38), 4 states have call successors, (6), 1 states have call predecessors, (6), 10 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 31 [2022-01-10 18:19:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:27,332 INFO L225 Difference]: With dead ends: 63 [2022-01-10 18:19:27,332 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 18:19:27,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=400, Invalid=2570, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 18:19:27,334 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:27,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 193 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 18:19:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 18:19:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2022-01-10 18:19:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (31), 10 states have call predecessors, (31), 6 states have call successors, (31) [2022-01-10 18:19:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 61 transitions. [2022-01-10 18:19:27,344 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 61 transitions. Word has length 31 [2022-01-10 18:19:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:27,344 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 61 transitions. [2022-01-10 18:19:27,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 18 states have internal predecessors, (38), 4 states have call successors, (6), 1 states have call predecessors, (6), 10 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-10 18:19:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 61 transitions. [2022-01-10 18:19:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 18:19:27,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:27,346 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:27,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:27,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:27,551 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2146689143, now seen corresponding path program 2 times [2022-01-10 18:19:27,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:27,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38394096] [2022-01-10 18:19:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:27,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:19:27,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:27,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38394096] [2022-01-10 18:19:27,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38394096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:27,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432343290] [2022-01-10 18:19:27,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:19:27,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:27,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:27,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:19:27,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:19:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-10 18:19:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 18:19:28,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 18:19:29,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432343290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:29,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:29,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2022-01-10 18:19:29,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570219683] [2022-01-10 18:19:29,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:29,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 18:19:29,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:29,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 18:19:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 18:19:29,352 INFO L87 Difference]: Start difference. First operand 35 states and 61 transitions. Second operand has 36 states, 33 states have (on average 1.393939393939394) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 18:19:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:30,525 INFO L93 Difference]: Finished difference Result 106 states and 253 transitions. [2022-01-10 18:19:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 18:19:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.393939393939394) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) Word has length 38 [2022-01-10 18:19:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:30,535 INFO L225 Difference]: With dead ends: 106 [2022-01-10 18:19:30,535 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 18:19:30,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=364, Invalid=2606, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 18:19:30,560 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:30,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 360 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 583 Invalid, 0 Unknown, 109 Unchecked, 0.5s Time] [2022-01-10 18:19:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 18:19:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2022-01-10 18:19:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 10 states have call successors, (10), 2 states have call predecessors, (10), 11 states have return successors, (99), 19 states have call predecessors, (99), 10 states have call successors, (99) [2022-01-10 18:19:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2022-01-10 18:19:30,594 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 38 [2022-01-10 18:19:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:30,594 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2022-01-10 18:19:30,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.393939393939394) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-10 18:19:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2022-01-10 18:19:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 18:19:30,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:30,604 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:30,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:30,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:30,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash 212811238, now seen corresponding path program 3 times [2022-01-10 18:19:30,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:30,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534178479] [2022-01-10 18:19:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:30,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:30,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:30,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:30,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 18:19:31,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:31,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534178479] [2022-01-10 18:19:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534178479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:31,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997869594] [2022-01-10 18:19:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:19:31,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:31,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:19:31,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 18:19:31,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:31,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 18:19:31,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 18:19:31,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 18:19:31,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997869594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:31,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:31,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 33 [2022-01-10 18:19:31,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431833115] [2022-01-10 18:19:31,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:31,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-10 18:19:31,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-10 18:19:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 18:19:31,950 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand has 33 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (19), 15 states have call predecessors, (19), 6 states have call successors, (19) [2022-01-10 18:19:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:33,986 INFO L93 Difference]: Finished difference Result 258 states and 1264 transitions. [2022-01-10 18:19:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-10 18:19:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (19), 15 states have call predecessors, (19), 6 states have call successors, (19) Word has length 50 [2022-01-10 18:19:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:33,991 INFO L225 Difference]: With dead ends: 258 [2022-01-10 18:19:33,991 INFO L226 Difference]: Without dead ends: 201 [2022-01-10 18:19:33,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1233, Invalid=6249, Unknown=0, NotChecked=0, Total=7482 [2022-01-10 18:19:33,996 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:33,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 239 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 18:19:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-10 18:19:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 73. [2022-01-10 18:19:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 2 states have call predecessors, (12), 16 states have return successors, (150), 24 states have call predecessors, (150), 12 states have call successors, (150) [2022-01-10 18:19:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 210 transitions. [2022-01-10 18:19:34,087 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 210 transitions. Word has length 50 [2022-01-10 18:19:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:34,087 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 210 transitions. [2022-01-10 18:19:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (19), 15 states have call predecessors, (19), 6 states have call successors, (19) [2022-01-10 18:19:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 210 transitions. [2022-01-10 18:19:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 18:19:34,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:34,089 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:34,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:34,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:34,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1764725263, now seen corresponding path program 4 times [2022-01-10 18:19:34,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:34,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125659497] [2022-01-10 18:19:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:34,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 18:19:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-10 18:19:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 18:19:34,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:34,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125659497] [2022-01-10 18:19:34,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125659497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580695669] [2022-01-10 18:19:34,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 18:19:34,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:34,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:34,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:19:34,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 18:19:34,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-10 18:19:34,873 INFO L286 TraceCheckSpWp]: Computing forward predicates...