/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/product-lines/email_spec0_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:19:46,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:19:46,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:19:46,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:19:46,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:19:46,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:19:46,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:19:46,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:19:46,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:19:46,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:19:46,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:19:46,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:19:46,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:19:46,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:19:46,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:19:46,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:19:46,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:19:46,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:19:46,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:19:46,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:19:46,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:19:46,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:19:46,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:19:46,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:19:46,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:19:46,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:19:46,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:19:46,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:19:46,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:19:46,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:19:46,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:19:46,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:19:46,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:19:46,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:19:46,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:19:46,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:19:46,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:19:46,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:19:46,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:19:46,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:19:46,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:19:47,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:19:47,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:19:47,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:19:47,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:19:47,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:19:47,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:19:47,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:19:47,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:19:47,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:19:47,021 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:19:47,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:19:47,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:19:47,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:19:47,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:19:47,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:19:47,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:19:47,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:19:47,023 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:19:47,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:19:47,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:19:47,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:19:47,241 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:19:47,246 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:19:47,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec0_product31.cil.c [2022-01-10 06:19:47,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8cf202a8/2b2a4736980e472b86add8a006b6630a/FLAGd5d97c3c6 [2022-01-10 06:19:47,819 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:19:47,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product31.cil.c [2022-01-10 06:19:47,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8cf202a8/2b2a4736980e472b86add8a006b6630a/FLAGd5d97c3c6 [2022-01-10 06:19:48,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8cf202a8/2b2a4736980e472b86add8a006b6630a [2022-01-10 06:19:48,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:19:48,308 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:19:48,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:19:48,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:19:48,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:19:48,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:48,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b45b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48, skipping insertion in model container [2022-01-10 06:19:48,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:48,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:19:48,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:19:48,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product31.cil.c[35932,35945] [2022-01-10 06:19:48,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:19:48,782 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:19:48,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:19:48,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product31.cil.c[35932,35945] [2022-01-10 06:19:48,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:19:48,891 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:19:48,933 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product31.cil.c[35932,35945] [2022-01-10 06:19:48,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:19:48,984 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:19:48,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48 WrapperNode [2022-01-10 06:19:48,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:19:48,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:19:48,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:19:48,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:19:48,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,101 INFO L137 Inliner]: procedures = 133, calls = 217, calls flagged for inlining = 61, calls inlined = 56, statements flattened = 953 [2022-01-10 06:19:49,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:19:49,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:19:49,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:19:49,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:19:49,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:19:49,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:19:49,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:19:49,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:19:49,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (1/1) ... [2022-01-10 06:19:49,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:19:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:19:49,229 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 06:19:49,233 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 06:19:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-01-10 06:19:49,260 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-01-10 06:19:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-01-10 06:19:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-01-10 06:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-01-10 06:19:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-01-10 06:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-01-10 06:19:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-01-10 06:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-01-10 06:19:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-01-10 06:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-01-10 06:19:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-01-10 06:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-01-10 06:19:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-01-10 06:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-01-10 06:19:49,262 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-01-10 06:19:49,262 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-01-10 06:19:49,262 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-01-10 06:19:49,262 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-01-10 06:19:49,262 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-01-10 06:19:49,262 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-01-10 06:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-01-10 06:19:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-01-10 06:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-01-10 06:19:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-01-10 06:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-01-10 06:19:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-01-10 06:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-01-10 06:19:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-01-10 06:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-01-10 06:19:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-01-10 06:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-01-10 06:19:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-01-10 06:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-01-10 06:19:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-01-10 06:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-01-10 06:19:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-01-10 06:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-01-10 06:19:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-01-10 06:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-01-10 06:19:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-01-10 06:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:19:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:19:49,442 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:19:49,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:19:50,012 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:19:50,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:19:50,023 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:19:50,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:50 BoogieIcfgContainer [2022-01-10 06:19:50,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:19:50,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:19:50,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:19:50,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:19:50,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:19:48" (1/3) ... [2022-01-10 06:19:50,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6c3511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:50, skipping insertion in model container [2022-01-10 06:19:50,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:48" (2/3) ... [2022-01-10 06:19:50,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6c3511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:50, skipping insertion in model container [2022-01-10 06:19:50,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:50" (3/3) ... [2022-01-10 06:19:50,031 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product31.cil.c [2022-01-10 06:19:50,035 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:19:50,035 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:19:50,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:19:50,086 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 06:19:50,086 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:19:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 283 states have (on average 1.5017667844522968) internal successors, (425), 287 states have internal predecessors, (425), 58 states have call successors, (58), 23 states have call predecessors, (58), 23 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-10 06:19:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 06:19:50,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:50,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:50,136 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash 839396453, now seen corresponding path program 1 times [2022-01-10 06:19:50,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652401646] [2022-01-10 06:19:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:50,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:50,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:50,154 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:50,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:19:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:19:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 06:19:50,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:50,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652401646] [2022-01-10 06:19:50,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652401646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:50,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:50,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:19:50,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933771406] [2022-01-10 06:19:50,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:50,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:19:50,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:19:50,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:19:50,826 INFO L87 Difference]: Start difference. First operand has 366 states, 283 states have (on average 1.5017667844522968) internal successors, (425), 287 states have internal predecessors, (425), 58 states have call successors, (58), 23 states have call predecessors, (58), 23 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:19:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:50,862 INFO L93 Difference]: Finished difference Result 578 states and 836 transitions. [2022-01-10 06:19:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:19:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 145 [2022-01-10 06:19:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:50,891 INFO L225 Difference]: With dead ends: 578 [2022-01-10 06:19:50,891 INFO L226 Difference]: Without dead ends: 359 [2022-01-10 06:19:50,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:19:50,901 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:50,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-10 06:19:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2022-01-10 06:19:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 277 states have (on average 1.4945848375451263) internal successors, (414), 280 states have internal predecessors, (414), 58 states have call successors, (58), 23 states have call predecessors, (58), 23 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-10 06:19:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 529 transitions. [2022-01-10 06:19:50,985 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 529 transitions. Word has length 145 [2022-01-10 06:19:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:50,986 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 529 transitions. [2022-01-10 06:19:50,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:19:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 529 transitions. [2022-01-10 06:19:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 06:19:50,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:50,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:51,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:19:51,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:51,200 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:51,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1597912540, now seen corresponding path program 1 times [2022-01-10 06:19:51,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:51,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628399614] [2022-01-10 06:19:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:51,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:51,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:51,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:51,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:19:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:19:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:19:51,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:51,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628399614] [2022-01-10 06:19:51,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628399614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:51,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:51,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:51,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938892419] [2022-01-10 06:19:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:51,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:51,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:51,630 INFO L87 Difference]: Start difference. First operand 359 states and 529 transitions. Second operand has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:51,689 INFO L93 Difference]: Finished difference Result 709 states and 1048 transitions. [2022-01-10 06:19:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:51,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) Word has length 146 [2022-01-10 06:19:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:51,691 INFO L225 Difference]: With dead ends: 709 [2022-01-10 06:19:51,691 INFO L226 Difference]: Without dead ends: 361 [2022-01-10 06:19:51,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:51,693 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 125 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:51,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1936 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-10 06:19:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2022-01-10 06:19:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 278 states have (on average 1.4928057553956835) internal successors, (415), 282 states have internal predecessors, (415), 58 states have call successors, (58), 23 states have call predecessors, (58), 24 states have return successors, (59), 57 states have call predecessors, (59), 57 states have call successors, (59) [2022-01-10 06:19:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 532 transitions. [2022-01-10 06:19:51,714 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 532 transitions. Word has length 146 [2022-01-10 06:19:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:51,714 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 532 transitions. [2022-01-10 06:19:51,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 532 transitions. [2022-01-10 06:19:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 06:19:51,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:51,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:51,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:51,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:51,927 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash 490552819, now seen corresponding path program 1 times [2022-01-10 06:19:51,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:51,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053846654] [2022-01-10 06:19:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:51,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:51,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:51,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:51,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:19:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:19:52,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:52,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:52,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053846654] [2022-01-10 06:19:52,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053846654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:52,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:52,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:52,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384894676] [2022-01-10 06:19:52,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:52,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:52,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:52,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:52,347 INFO L87 Difference]: Start difference. First operand 361 states and 532 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:52,401 INFO L93 Difference]: Finished difference Result 711 states and 1052 transitions. [2022-01-10 06:19:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 147 [2022-01-10 06:19:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:52,403 INFO L225 Difference]: With dead ends: 711 [2022-01-10 06:19:52,403 INFO L226 Difference]: Without dead ends: 363 [2022-01-10 06:19:52,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:52,405 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 124 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:52,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1925 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-10 06:19:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-01-10 06:19:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 279 states have (on average 1.4910394265232976) internal successors, (416), 284 states have internal predecessors, (416), 58 states have call successors, (58), 23 states have call predecessors, (58), 25 states have return successors, (63), 57 states have call predecessors, (63), 57 states have call successors, (63) [2022-01-10 06:19:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 537 transitions. [2022-01-10 06:19:52,422 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 537 transitions. Word has length 147 [2022-01-10 06:19:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:52,422 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 537 transitions. [2022-01-10 06:19:52,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 537 transitions. [2022-01-10 06:19:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 06:19:52,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:52,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:52,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:52,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:52,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1605172771, now seen corresponding path program 1 times [2022-01-10 06:19:52,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625961690] [2022-01-10 06:19:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:52,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:52,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:52,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:19:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:19:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:19:53,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:53,054 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625961690] [2022-01-10 06:19:53,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625961690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:53,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:53,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:53,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204219758] [2022-01-10 06:19:53,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:53,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:53,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:53,056 INFO L87 Difference]: Start difference. First operand 363 states and 537 transitions. Second operand has 5 states, 4 states have (on average 21.25) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:53,100 INFO L93 Difference]: Finished difference Result 703 states and 1042 transitions. [2022-01-10 06:19:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.25) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) Word has length 148 [2022-01-10 06:19:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:53,102 INFO L225 Difference]: With dead ends: 703 [2022-01-10 06:19:53,102 INFO L226 Difference]: Without dead ends: 363 [2022-01-10 06:19:53,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:53,104 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 123 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:53,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1939 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-10 06:19:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-01-10 06:19:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 279 states have (on average 1.4910394265232976) internal successors, (416), 284 states have internal predecessors, (416), 58 states have call successors, (58), 23 states have call predecessors, (58), 25 states have return successors, (62), 57 states have call predecessors, (62), 57 states have call successors, (62) [2022-01-10 06:19:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 536 transitions. [2022-01-10 06:19:53,118 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 536 transitions. Word has length 148 [2022-01-10 06:19:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:53,119 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 536 transitions. [2022-01-10 06:19:53,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.25) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 536 transitions. [2022-01-10 06:19:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-10 06:19:53,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:53,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:53,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:53,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:53,330 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:53,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:53,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1790018916, now seen corresponding path program 2 times [2022-01-10 06:19:53,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:53,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677635959] [2022-01-10 06:19:53,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:19:53,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:53,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:53,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:53,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:19:53,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:19:53,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:19:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 06:19:53,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:53,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677635959] [2022-01-10 06:19:53,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677635959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:53,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:53,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:53,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000504433] [2022-01-10 06:19:53,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:53,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:53,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:53,722 INFO L87 Difference]: Start difference. First operand 363 states and 536 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:19:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:53,736 INFO L93 Difference]: Finished difference Result 572 states and 824 transitions. [2022-01-10 06:19:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 149 [2022-01-10 06:19:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:53,739 INFO L225 Difference]: With dead ends: 572 [2022-01-10 06:19:53,739 INFO L226 Difference]: Without dead ends: 366 [2022-01-10 06:19:53,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:53,740 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:53,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1052 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-10 06:19:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2022-01-10 06:19:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 281 states have (on average 1.4875444839857652) internal successors, (418), 286 states have internal predecessors, (418), 58 states have call successors, (58), 23 states have call predecessors, (58), 25 states have return successors, (62), 57 states have call predecessors, (62), 57 states have call successors, (62) [2022-01-10 06:19:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 538 transitions. [2022-01-10 06:19:53,754 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 538 transitions. Word has length 149 [2022-01-10 06:19:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:53,754 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 538 transitions. [2022-01-10 06:19:53,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:19:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 538 transitions. [2022-01-10 06:19:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 06:19:53,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:53,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:53,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:53,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:53,965 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash 691676197, now seen corresponding path program 1 times [2022-01-10 06:19:53,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:53,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781668285] [2022-01-10 06:19:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:53,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:53,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:19:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:19:54,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:19:54,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:54,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:54,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781668285] [2022-01-10 06:19:54,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781668285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:54,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:54,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:54,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423170080] [2022-01-10 06:19:54,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:54,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:54,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:54,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:54,395 INFO L87 Difference]: Start difference. First operand 365 states and 538 transitions. Second operand has 5 states, 4 states have (on average 22.75) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:54,444 INFO L93 Difference]: Finished difference Result 709 states and 1049 transitions. [2022-01-10 06:19:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 22.75) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) Word has length 155 [2022-01-10 06:19:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:54,448 INFO L225 Difference]: With dead ends: 709 [2022-01-10 06:19:54,448 INFO L226 Difference]: Without dead ends: 367 [2022-01-10 06:19:54,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:54,452 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 121 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:54,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1941 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-10 06:19:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-01-10 06:19:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 282 states have (on average 1.4858156028368794) internal successors, (419), 288 states have internal predecessors, (419), 58 states have call successors, (58), 23 states have call predecessors, (58), 26 states have return successors, (64), 57 states have call predecessors, (64), 57 states have call successors, (64) [2022-01-10 06:19:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 541 transitions. [2022-01-10 06:19:54,466 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 541 transitions. Word has length 155 [2022-01-10 06:19:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:54,466 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 541 transitions. [2022-01-10 06:19:54,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 22.75) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 541 transitions. [2022-01-10 06:19:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 06:19:54,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:54,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:54,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:54,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:54,685 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1798134809, now seen corresponding path program 1 times [2022-01-10 06:19:54,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:54,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166221691] [2022-01-10 06:19:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:54,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:54,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:54,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:54,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:19:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:19:55,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:55,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:55,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166221691] [2022-01-10 06:19:55,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166221691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:55,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:55,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:55,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281900422] [2022-01-10 06:19:55,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:55,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:55,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:55,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:55,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:55,148 INFO L87 Difference]: Start difference. First operand 367 states and 541 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:55,207 INFO L93 Difference]: Finished difference Result 707 states and 1044 transitions. [2022-01-10 06:19:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 156 [2022-01-10 06:19:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:55,210 INFO L225 Difference]: With dead ends: 707 [2022-01-10 06:19:55,210 INFO L226 Difference]: Without dead ends: 367 [2022-01-10 06:19:55,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:55,211 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 122 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:55,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1928 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-10 06:19:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-01-10 06:19:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 282 states have (on average 1.4858156028368794) internal successors, (419), 288 states have internal predecessors, (419), 58 states have call successors, (58), 23 states have call predecessors, (58), 26 states have return successors, (63), 57 states have call predecessors, (63), 57 states have call successors, (63) [2022-01-10 06:19:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 540 transitions. [2022-01-10 06:19:55,222 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 540 transitions. Word has length 156 [2022-01-10 06:19:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:55,223 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 540 transitions. [2022-01-10 06:19:55,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 540 transitions. [2022-01-10 06:19:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 06:19:55,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:55,224 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:55,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 06:19:55,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:55,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash -523838859, now seen corresponding path program 2 times [2022-01-10 06:19:55,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:55,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481866616] [2022-01-10 06:19:55,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:19:55,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:55,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:55,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:19:55,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:19:55,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:19:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:55,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 06:19:55,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:55,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481866616] [2022-01-10 06:19:55,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481866616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:55,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:55,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:19:55,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844204758] [2022-01-10 06:19:55,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:55,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:55,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:55,939 INFO L87 Difference]: Start difference. First operand 367 states and 540 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:19:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:55,991 INFO L93 Difference]: Finished difference Result 937 states and 1353 transitions. [2022-01-10 06:19:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:19:55,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 157 [2022-01-10 06:19:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:55,995 INFO L225 Difference]: With dead ends: 937 [2022-01-10 06:19:55,995 INFO L226 Difference]: Without dead ends: 739 [2022-01-10 06:19:55,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:19:55,996 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 471 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:55,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 2240 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-10 06:19:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 703. [2022-01-10 06:19:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 544 states have (on average 1.4981617647058822) internal successors, (815), 553 states have internal predecessors, (815), 110 states have call successors, (110), 45 states have call predecessors, (110), 48 states have return successors, (114), 108 states have call predecessors, (114), 108 states have call successors, (114) [2022-01-10 06:19:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1039 transitions. [2022-01-10 06:19:56,018 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1039 transitions. Word has length 157 [2022-01-10 06:19:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:56,019 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1039 transitions. [2022-01-10 06:19:56,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 06:19:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1039 transitions. [2022-01-10 06:19:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 06:19:56,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:56,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:56,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:56,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:56,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -796877324, now seen corresponding path program 1 times [2022-01-10 06:19:56,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:56,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542998890] [2022-01-10 06:19:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:56,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:56,234 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:56,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:19:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:56,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:19:56,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:56,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542998890] [2022-01-10 06:19:56,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542998890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:56,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:56,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:56,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586912530] [2022-01-10 06:19:56,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:56,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:56,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:56,669 INFO L87 Difference]: Start difference. First operand 703 states and 1039 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:56,763 INFO L93 Difference]: Finished difference Result 1383 states and 2050 transitions. [2022-01-10 06:19:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 158 [2022-01-10 06:19:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:56,767 INFO L225 Difference]: With dead ends: 1383 [2022-01-10 06:19:56,767 INFO L226 Difference]: Without dead ends: 707 [2022-01-10 06:19:56,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:56,771 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 120 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:56,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1930 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-10 06:19:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 705. [2022-01-10 06:19:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 545 states have (on average 1.4972477064220184) internal successors, (816), 555 states have internal predecessors, (816), 110 states have call successors, (110), 45 states have call predecessors, (110), 49 states have return successors, (118), 108 states have call predecessors, (118), 108 states have call successors, (118) [2022-01-10 06:19:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1044 transitions. [2022-01-10 06:19:56,795 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1044 transitions. Word has length 158 [2022-01-10 06:19:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:56,796 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1044 transitions. [2022-01-10 06:19:56,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1044 transitions. [2022-01-10 06:19:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 06:19:56,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:56,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:56,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:57,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:57,008 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:57,009 INFO L85 PathProgramCache]: Analyzing trace with hash 44663113, now seen corresponding path program 1 times [2022-01-10 06:19:57,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708893430] [2022-01-10 06:19:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:57,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:57,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:57,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:57,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:19:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:19:57,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:57,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:57,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708893430] [2022-01-10 06:19:57,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708893430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:57,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:57,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:57,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550549255] [2022-01-10 06:19:57,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:57,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:57,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:57,564 INFO L87 Difference]: Start difference. First operand 705 states and 1044 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:57,651 INFO L93 Difference]: Finished difference Result 1387 states and 2058 transitions. [2022-01-10 06:19:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 159 [2022-01-10 06:19:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:57,654 INFO L225 Difference]: With dead ends: 1387 [2022-01-10 06:19:57,654 INFO L226 Difference]: Without dead ends: 709 [2022-01-10 06:19:57,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:57,657 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 120 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:57,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1928 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-10 06:19:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 705. [2022-01-10 06:19:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 545 states have (on average 1.4972477064220184) internal successors, (816), 555 states have internal predecessors, (816), 110 states have call successors, (110), 45 states have call predecessors, (110), 49 states have return successors, (118), 108 states have call predecessors, (118), 108 states have call successors, (118) [2022-01-10 06:19:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1044 transitions. [2022-01-10 06:19:57,677 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1044 transitions. Word has length 159 [2022-01-10 06:19:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:57,677 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1044 transitions. [2022-01-10 06:19:57,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:19:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1044 transitions. [2022-01-10 06:19:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 06:19:57,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:57,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:57,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:57,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:57,889 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:57,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1884269113, now seen corresponding path program 1 times [2022-01-10 06:19:57,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:57,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168091885] [2022-01-10 06:19:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:57,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:57,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:57,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:19:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:19:58,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:58,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:58,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168091885] [2022-01-10 06:19:58,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168091885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:58,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:58,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:58,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063470878] [2022-01-10 06:19:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:58,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:58,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:58,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:58,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:58,317 INFO L87 Difference]: Start difference. First operand 705 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:19:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:58,346 INFO L93 Difference]: Finished difference Result 1493 states and 2235 transitions. [2022-01-10 06:19:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 159 [2022-01-10 06:19:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:58,350 INFO L225 Difference]: With dead ends: 1493 [2022-01-10 06:19:58,350 INFO L226 Difference]: Without dead ends: 819 [2022-01-10 06:19:58,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:58,352 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 107 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:58,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1027 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-10 06:19:58,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 803. [2022-01-10 06:19:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 621 states have (on average 1.5136876006441224) internal successors, (940), 631 states have internal predecessors, (940), 132 states have call successors, (132), 45 states have call predecessors, (132), 49 states have return successors, (142), 130 states have call predecessors, (142), 130 states have call successors, (142) [2022-01-10 06:19:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1214 transitions. [2022-01-10 06:19:58,377 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1214 transitions. Word has length 159 [2022-01-10 06:19:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:58,378 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1214 transitions. [2022-01-10 06:19:58,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:19:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1214 transitions. [2022-01-10 06:19:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 06:19:58,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:58,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:58,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:58,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:58,590 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1226889606, now seen corresponding path program 1 times [2022-01-10 06:19:58,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:58,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990323752] [2022-01-10 06:19:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:58,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:58,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:58,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:19:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:19:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:19:59,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:19:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:19:59,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990323752] [2022-01-10 06:19:59,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990323752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:19:59,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:19:59,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:19:59,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838876783] [2022-01-10 06:19:59,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:19:59,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:19:59,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:19:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:59,378 INFO L87 Difference]: Start difference. First operand 803 states and 1214 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-01-10 06:19:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:59,603 INFO L93 Difference]: Finished difference Result 1794 states and 2773 transitions. [2022-01-10 06:19:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:19:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 160 [2022-01-10 06:19:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:59,613 INFO L225 Difference]: With dead ends: 1794 [2022-01-10 06:19:59,613 INFO L226 Difference]: Without dead ends: 1380 [2022-01-10 06:19:59,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:19:59,616 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 511 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:59,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1958 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:19:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-01-10 06:19:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1340. [2022-01-10 06:19:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1055 states have (on average 1.5696682464454976) internal successors, (1656), 1065 states have internal predecessors, (1656), 235 states have call successors, (235), 45 states have call predecessors, (235), 49 states have return successors, (255), 233 states have call predecessors, (255), 233 states have call successors, (255) [2022-01-10 06:19:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2146 transitions. [2022-01-10 06:19:59,662 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2146 transitions. Word has length 160 [2022-01-10 06:19:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:59,663 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 2146 transitions. [2022-01-10 06:19:59,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-01-10 06:19:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2146 transitions. [2022-01-10 06:19:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 06:19:59,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:59,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:19:59,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:59,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:59,877 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:59,878 INFO L85 PathProgramCache]: Analyzing trace with hash -986629507, now seen corresponding path program 1 times [2022-01-10 06:19:59,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:59,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786243190] [2022-01-10 06:19:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:59,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:59,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:59,880 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:20:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:00,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:00,323 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:00,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786243190] [2022-01-10 06:20:00,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786243190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:00,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:00,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:00,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384859283] [2022-01-10 06:20:00,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:00,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:00,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:00,324 INFO L87 Difference]: Start difference. First operand 1340 states and 2146 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:00,386 INFO L93 Difference]: Finished difference Result 3159 states and 5125 transitions. [2022-01-10 06:20:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 166 [2022-01-10 06:20:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:00,399 INFO L225 Difference]: With dead ends: 3159 [2022-01-10 06:20:00,399 INFO L226 Difference]: Without dead ends: 1887 [2022-01-10 06:20:00,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:00,404 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 105 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:00,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1069 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2022-01-10 06:20:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1871. [2022-01-10 06:20:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1483 states have (on average 1.5846257585974377) internal successors, (2350), 1493 states have internal predecessors, (2350), 338 states have call successors, (338), 45 states have call predecessors, (338), 49 states have return successors, (368), 336 states have call predecessors, (368), 336 states have call successors, (368) [2022-01-10 06:20:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 3056 transitions. [2022-01-10 06:20:00,501 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 3056 transitions. Word has length 166 [2022-01-10 06:20:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:00,502 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 3056 transitions. [2022-01-10 06:20:00,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 3056 transitions. [2022-01-10 06:20:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 06:20:00,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:00,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:00,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:00,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:00,725 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:00,727 INFO L85 PathProgramCache]: Analyzing trace with hash 173960711, now seen corresponding path program 1 times [2022-01-10 06:20:00,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:00,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798440342] [2022-01-10 06:20:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:00,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:00,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:00,729 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:00,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:20:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:00,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:01,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:01,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798440342] [2022-01-10 06:20:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798440342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:01,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:01,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:01,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802543616] [2022-01-10 06:20:01,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:01,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:01,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:01,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:01,195 INFO L87 Difference]: Start difference. First operand 1871 states and 3056 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:01,336 INFO L93 Difference]: Finished difference Result 4466 states and 7348 transitions. [2022-01-10 06:20:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2022-01-10 06:20:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:01,346 INFO L225 Difference]: With dead ends: 4466 [2022-01-10 06:20:01,346 INFO L226 Difference]: Without dead ends: 2716 [2022-01-10 06:20:01,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:01,351 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 103 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:01,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 1065 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2022-01-10 06:20:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 2700. [2022-01-10 06:20:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2158 states have (on average 1.5954587581093604) internal successors, (3443), 2168 states have internal predecessors, (3443), 492 states have call successors, (492), 45 states have call predecessors, (492), 49 states have return successors, (522), 490 states have call predecessors, (522), 490 states have call successors, (522) [2022-01-10 06:20:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 4457 transitions. [2022-01-10 06:20:01,468 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 4457 transitions. Word has length 167 [2022-01-10 06:20:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:01,468 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 4457 transitions. [2022-01-10 06:20:01,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 4457 transitions. [2022-01-10 06:20:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 06:20:01,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:01,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:01,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:01,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:01,687 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash -63011301, now seen corresponding path program 1 times [2022-01-10 06:20:01,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:01,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191162992] [2022-01-10 06:20:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:01,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:01,689 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:01,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:20:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:01,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:02,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:02,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191162992] [2022-01-10 06:20:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191162992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:02,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:02,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:02,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775033834] [2022-01-10 06:20:02,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:02,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:02,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:02,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:02,125 INFO L87 Difference]: Start difference. First operand 2700 states and 4457 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:02,224 INFO L93 Difference]: Finished difference Result 6461 states and 10747 transitions. [2022-01-10 06:20:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 168 [2022-01-10 06:20:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:02,240 INFO L225 Difference]: With dead ends: 6461 [2022-01-10 06:20:02,241 INFO L226 Difference]: Without dead ends: 4007 [2022-01-10 06:20:02,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:02,252 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 101 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:02,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1059 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2022-01-10 06:20:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3991. [2022-01-10 06:20:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3243 states have (on average 1.6056120875732347) internal successors, (5207), 3253 states have internal predecessors, (5207), 698 states have call successors, (698), 45 states have call predecessors, (698), 49 states have return successors, (744), 696 states have call predecessors, (744), 696 states have call successors, (744) [2022-01-10 06:20:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 6649 transitions. [2022-01-10 06:20:02,457 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 6649 transitions. Word has length 168 [2022-01-10 06:20:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:02,457 INFO L470 AbstractCegarLoop]: Abstraction has 3991 states and 6649 transitions. [2022-01-10 06:20:02,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 6649 transitions. [2022-01-10 06:20:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 06:20:02,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:02,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:02,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:02,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:02,683 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash -942977018, now seen corresponding path program 1 times [2022-01-10 06:20:02,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:02,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426976408] [2022-01-10 06:20:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:02,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:02,686 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:02,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:20:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:03,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:03,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:03,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426976408] [2022-01-10 06:20:03,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426976408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:03,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:03,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:03,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653966780] [2022-01-10 06:20:03,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:03,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:03,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:03,135 INFO L87 Difference]: Start difference. First operand 3991 states and 6649 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:03,345 INFO L93 Difference]: Finished difference Result 9691 states and 16253 transitions. [2022-01-10 06:20:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 169 [2022-01-10 06:20:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:03,373 INFO L225 Difference]: With dead ends: 9691 [2022-01-10 06:20:03,374 INFO L226 Difference]: Without dead ends: 6150 [2022-01-10 06:20:03,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:03,386 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 99 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:03,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1059 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2022-01-10 06:20:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 6134. [2022-01-10 06:20:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6134 states, 5076 states have (on average 1.614066193853428) internal successors, (8193), 5086 states have internal predecessors, (8193), 1008 states have call successors, (1008), 45 states have call predecessors, (1008), 49 states have return successors, (1080), 1006 states have call predecessors, (1080), 1006 states have call successors, (1080) [2022-01-10 06:20:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6134 states to 6134 states and 10281 transitions. [2022-01-10 06:20:03,636 INFO L78 Accepts]: Start accepts. Automaton has 6134 states and 10281 transitions. Word has length 169 [2022-01-10 06:20:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:03,637 INFO L470 AbstractCegarLoop]: Abstraction has 6134 states and 10281 transitions. [2022-01-10 06:20:03,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6134 states and 10281 transitions. [2022-01-10 06:20:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 06:20:03,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:03,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:03,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:03,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:03,870 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -558148897, now seen corresponding path program 1 times [2022-01-10 06:20:03,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:03,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449982346] [2022-01-10 06:20:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:03,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:03,889 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:03,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:20:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:04,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:04,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:04,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449982346] [2022-01-10 06:20:04,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449982346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:04,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:04,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:04,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338931954] [2022-01-10 06:20:04,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:04,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:04,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:04,369 INFO L87 Difference]: Start difference. First operand 6134 states and 10281 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:04,622 INFO L93 Difference]: Finished difference Result 14842 states and 25076 transitions. [2022-01-10 06:20:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:04,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 170 [2022-01-10 06:20:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:04,681 INFO L225 Difference]: With dead ends: 14842 [2022-01-10 06:20:04,682 INFO L226 Difference]: Without dead ends: 9923 [2022-01-10 06:20:04,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:04,698 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 97 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:04,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1074 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9923 states. [2022-01-10 06:20:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9923 to 9907. [2022-01-10 06:20:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9907 states, 8147 states have (on average 1.6145820547440777) internal successors, (13154), 8157 states have internal predecessors, (13154), 1710 states have call successors, (1710), 45 states have call predecessors, (1710), 49 states have return successors, (1826), 1708 states have call predecessors, (1826), 1708 states have call successors, (1826) [2022-01-10 06:20:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9907 states to 9907 states and 16690 transitions. [2022-01-10 06:20:05,121 INFO L78 Accepts]: Start accepts. Automaton has 9907 states and 16690 transitions. Word has length 170 [2022-01-10 06:20:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:05,121 INFO L470 AbstractCegarLoop]: Abstraction has 9907 states and 16690 transitions. [2022-01-10 06:20:05,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 9907 states and 16690 transitions. [2022-01-10 06:20:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-10 06:20:05,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:05,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:05,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:05,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:05,397 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash 71737154, now seen corresponding path program 1 times [2022-01-10 06:20:05,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:05,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448607882] [2022-01-10 06:20:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:05,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:05,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:05,399 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:05,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:20:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:05,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:05,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:05,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448607882] [2022-01-10 06:20:05,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448607882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:05,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:05,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:05,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942859730] [2022-01-10 06:20:05,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:05,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:05,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:05,812 INFO L87 Difference]: Start difference. First operand 9907 states and 16690 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:06,288 INFO L93 Difference]: Finished difference Result 25261 states and 42805 transitions. [2022-01-10 06:20:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 171 [2022-01-10 06:20:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:06,347 INFO L225 Difference]: With dead ends: 25261 [2022-01-10 06:20:06,347 INFO L226 Difference]: Without dead ends: 16886 [2022-01-10 06:20:06,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:06,375 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 95 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:06,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1071 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16886 states. [2022-01-10 06:20:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16886 to 16870. [2022-01-10 06:20:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16870 states, 13966 states have (on average 1.6131318917370758) internal successors, (22529), 13976 states have internal predecessors, (22529), 2854 states have call successors, (2854), 45 states have call predecessors, (2854), 49 states have return successors, (3048), 2852 states have call predecessors, (3048), 2852 states have call successors, (3048) [2022-01-10 06:20:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16870 states to 16870 states and 28431 transitions. [2022-01-10 06:20:07,134 INFO L78 Accepts]: Start accepts. Automaton has 16870 states and 28431 transitions. Word has length 171 [2022-01-10 06:20:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:07,134 INFO L470 AbstractCegarLoop]: Abstraction has 16870 states and 28431 transitions. [2022-01-10 06:20:07,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 16870 states and 28431 transitions. [2022-01-10 06:20:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 06:20:07,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:07,181 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:07,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:07,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:07,392 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash -782751055, now seen corresponding path program 1 times [2022-01-10 06:20:07,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:07,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059954267] [2022-01-10 06:20:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:07,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:07,394 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:07,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:20:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:07,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:07,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:07,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:07,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059954267] [2022-01-10 06:20:07,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059954267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:07,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:07,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:07,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519589349] [2022-01-10 06:20:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:07,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:07,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:07,880 INFO L87 Difference]: Start difference. First operand 16870 states and 28431 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:08,769 INFO L93 Difference]: Finished difference Result 45013 states and 76143 transitions. [2022-01-10 06:20:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 172 [2022-01-10 06:20:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:08,867 INFO L225 Difference]: With dead ends: 45013 [2022-01-10 06:20:08,868 INFO L226 Difference]: Without dead ends: 30297 [2022-01-10 06:20:08,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:08,907 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 93 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:08,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1075 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30297 states. [2022-01-10 06:20:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30297 to 30281. [2022-01-10 06:20:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30281 states, 25058 states have (on average 1.6042780748663101) internal successors, (40200), 25068 states have internal predecessors, (40200), 5173 states have call successors, (5173), 45 states have call predecessors, (5173), 49 states have return successors, (5511), 5171 states have call predecessors, (5511), 5171 states have call successors, (5511) [2022-01-10 06:20:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30281 states to 30281 states and 50884 transitions. [2022-01-10 06:20:10,229 INFO L78 Accepts]: Start accepts. Automaton has 30281 states and 50884 transitions. Word has length 172 [2022-01-10 06:20:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:10,230 INFO L470 AbstractCegarLoop]: Abstraction has 30281 states and 50884 transitions. [2022-01-10 06:20:10,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 30281 states and 50884 transitions. [2022-01-10 06:20:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-10 06:20:10,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:10,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:10,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:10,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:10,531 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:10,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1736211423, now seen corresponding path program 1 times [2022-01-10 06:20:10,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:10,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521693402] [2022-01-10 06:20:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:10,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:10,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:10,533 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:10,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:20:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:10,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:10,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521693402] [2022-01-10 06:20:10,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521693402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:10,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:10,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:10,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846067328] [2022-01-10 06:20:10,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:10,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:10,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:10,996 INFO L87 Difference]: Start difference. First operand 30281 states and 50884 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:12,678 INFO L93 Difference]: Finished difference Result 82309 states and 138863 transitions. [2022-01-10 06:20:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 173 [2022-01-10 06:20:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:12,890 INFO L225 Difference]: With dead ends: 82309 [2022-01-10 06:20:12,890 INFO L226 Difference]: Without dead ends: 55044 [2022-01-10 06:20:12,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:12,964 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 91 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:12,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1064 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55044 states. [2022-01-10 06:20:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55044 to 55028. [2022-01-10 06:20:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55028 states, 45820 states have (on average 1.6000218245307727) internal successors, (73313), 45830 states have internal predecessors, (73313), 9158 states have call successors, (9158), 45 states have call predecessors, (9158), 49 states have return successors, (9770), 9156 states have call predecessors, (9770), 9156 states have call successors, (9770) [2022-01-10 06:20:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55028 states to 55028 states and 92241 transitions. [2022-01-10 06:20:16,110 INFO L78 Accepts]: Start accepts. Automaton has 55028 states and 92241 transitions. Word has length 173 [2022-01-10 06:20:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:16,110 INFO L470 AbstractCegarLoop]: Abstraction has 55028 states and 92241 transitions. [2022-01-10 06:20:16,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 55028 states and 92241 transitions. [2022-01-10 06:20:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-10 06:20:16,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:16,239 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:16,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 06:20:16,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:16,449 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1417883249, now seen corresponding path program 1 times [2022-01-10 06:20:16,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:16,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341261281] [2022-01-10 06:20:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:16,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:16,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:16,589 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:16,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:20:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:16,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:17,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:17,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:17,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341261281] [2022-01-10 06:20:17,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341261281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:17,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:17,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:17,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049840640] [2022-01-10 06:20:17,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:17,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:17,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:17,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:17,035 INFO L87 Difference]: Start difference. First operand 55028 states and 92241 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:20,202 INFO L93 Difference]: Finished difference Result 153159 states and 257501 transitions. [2022-01-10 06:20:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:20,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 174 [2022-01-10 06:20:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:20,874 INFO L225 Difference]: With dead ends: 153159 [2022-01-10 06:20:20,874 INFO L226 Difference]: Without dead ends: 102157 [2022-01-10 06:20:21,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:21,011 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 89 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:21,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1066 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102157 states. [2022-01-10 06:20:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102157 to 102141. [2022-01-10 06:20:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102141 states, 85608 states have (on average 1.594115035977946) internal successors, (136469), 85618 states have internal predecessors, (136469), 16483 states have call successors, (16483), 45 states have call predecessors, (16483), 49 states have return successors, (17627), 16481 states have call predecessors, (17627), 16481 states have call successors, (17627) [2022-01-10 06:20:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102141 states to 102141 states and 170579 transitions. [2022-01-10 06:20:26,369 INFO L78 Accepts]: Start accepts. Automaton has 102141 states and 170579 transitions. Word has length 174 [2022-01-10 06:20:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:26,369 INFO L470 AbstractCegarLoop]: Abstraction has 102141 states and 170579 transitions. [2022-01-10 06:20:26,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 102141 states and 170579 transitions. [2022-01-10 06:20:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 06:20:26,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:26,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:26,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:26,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:26,805 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash -630481023, now seen corresponding path program 1 times [2022-01-10 06:20:26,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:26,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901508542] [2022-01-10 06:20:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:26,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:26,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:26,807 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:26,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:20:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:27,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:20:27,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:20:27,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:20:27,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901508542] [2022-01-10 06:20:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901508542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:20:27,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:20:27,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:20:27,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355351676] [2022-01-10 06:20:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:20:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:20:27,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:20:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:27,214 INFO L87 Difference]: Start difference. First operand 102141 states and 170579 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:32,682 INFO L93 Difference]: Finished difference Result 191734 states and 320688 transitions. [2022-01-10 06:20:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:20:32,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2022-01-10 06:20:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:33,803 INFO L225 Difference]: With dead ends: 191734 [2022-01-10 06:20:33,803 INFO L226 Difference]: Without dead ends: 191320 [2022-01-10 06:20:33,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:20:33,891 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 87 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:33,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1064 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191320 states. [2022-01-10 06:20:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191320 to 191304. [2022-01-10 06:20:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191304 states, 161460 states have (on average 1.5866654279697758) internal successors, (256183), 161470 states have internal predecessors, (256183), 29794 states have call successors, (29794), 45 states have call predecessors, (29794), 49 states have return successors, (31984), 29792 states have call predecessors, (31984), 29792 states have call successors, (31984) [2022-01-10 06:20:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191304 states to 191304 states and 317961 transitions. [2022-01-10 06:20:42,967 INFO L78 Accepts]: Start accepts. Automaton has 191304 states and 317961 transitions. Word has length 175 [2022-01-10 06:20:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:20:42,967 INFO L470 AbstractCegarLoop]: Abstraction has 191304 states and 317961 transitions. [2022-01-10 06:20:42,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:20:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 191304 states and 317961 transitions. [2022-01-10 06:20:43,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 06:20:43,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:20:43,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:20:43,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:20:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:20:43,767 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:20:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:20:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash 130781488, now seen corresponding path program 1 times [2022-01-10 06:20:43,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:20:43,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659836564] [2022-01-10 06:20:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:20:43,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:20:43,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:20:43,770 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:20:43,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:20:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:20:43,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:20:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:20:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 06:20:44,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:20:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 06:20:44,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:20:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659836564] [2022-01-10 06:20:44,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659836564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:20:44,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:20:44,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 06:20:44,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117194537] [2022-01-10 06:20:44,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:20:44,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:20:44,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:20:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:20:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:20:44,706 INFO L87 Difference]: Start difference. First operand 191304 states and 317961 transitions. Second operand has 16 states, 16 states have (on average 12.25) internal successors, (196), 14 states have internal predecessors, (196), 4 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (35), 6 states have call predecessors, (35), 4 states have call successors, (35)