/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_spec6_product33.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:27:52,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:27:52,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:27:52,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:27:52,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:27:52,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:27:52,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:27:52,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:27:52,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:27:52,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:27:52,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:27:52,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:27:52,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:27:52,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:27:52,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:27:52,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:27:52,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:27:52,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:27:52,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:27:52,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:27:52,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:27:52,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:27:52,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:27:52,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:27:52,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:27:52,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:27:52,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:27:52,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:27:52,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:27:52,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:27:52,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:27:52,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:27:52,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:27:52,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:27:52,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:27:52,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:27:52,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:27:52,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:27:52,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:27:52,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:27:52,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:27:52,350 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 06:27:52,377 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:27:52,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:27:52,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:27:52,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:27:52,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:27:52,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:27:52,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:27:52,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:27:52,378 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:27:52,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:27:52,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:27:52,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:27:52,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:27:52,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:27:52,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:27:52,395 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:27:52,395 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:27:52,395 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:27:52,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:27:52,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:27:52,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:27:52,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:27:52,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:27:52,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:27:52,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:27:52,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:27:52,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:27:52,398 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:27:52,398 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:27:52,398 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:27:52,398 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:27:52,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:27:52,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:27:52,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:27:52,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:27:52,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:27:52,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:27:52,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:27:52,677 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:27:52,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec6_product33.cil.c [2022-01-10 06:27:52,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393f8efe4/6889242be85740a0be9281d79af8d0b1/FLAGc242c893b [2022-01-10 06:27:53,207 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:27:53,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec6_product33.cil.c [2022-01-10 06:27:53,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393f8efe4/6889242be85740a0be9281d79af8d0b1/FLAGc242c893b [2022-01-10 06:27:53,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393f8efe4/6889242be85740a0be9281d79af8d0b1 [2022-01-10 06:27:53,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:27:53,483 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:27:53,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:27:53,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:27:53,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:27:53,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:27:53" (1/1) ... [2022-01-10 06:27:53,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178025e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:53, skipping insertion in model container [2022-01-10 06:27:53,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:27:53" (1/1) ... [2022-01-10 06:27:53,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:27:53,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:27:53,754 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_spec6_product33.cil.c[1934,1947] [2022-01-10 06:27:54,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:27:54,021 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:27:54,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:27:54,034 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_spec6_product33.cil.c[1934,1947] [2022-01-10 06:27:54,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:27:54,105 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:27:54,116 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_spec6_product33.cil.c[1934,1947] [2022-01-10 06:27:54,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:27:54,197 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:27:54,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54 WrapperNode [2022-01-10 06:27:54,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:27:54,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:27:54,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:27:54,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:27:54,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,271 INFO L137 Inliner]: procedures = 137, calls = 235, calls flagged for inlining = 66, calls inlined = 61, statements flattened = 1034 [2022-01-10 06:27:54,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:27:54,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:27:54,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:27:54,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:27:54,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:27:54,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:27:54,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:27:54,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:27:54,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (1/1) ... [2022-01-10 06:27:54,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:27:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:27:54,347 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 06:27:54,349 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 06:27:54,374 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-01-10 06:27:54,375 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-01-10 06:27:54,375 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-01-10 06:27:54,376 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-01-10 06:27:54,376 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-01-10 06:27:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-01-10 06:27:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-01-10 06:27:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-01-10 06:27:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-01-10 06:27:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-01-10 06:27:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-01-10 06:27:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-01-10 06:27:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-01-10 06:27:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-01-10 06:27:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-01-10 06:27:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-01-10 06:27:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-01-10 06:27:54,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-01-10 06:27:54,378 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-01-10 06:27:54,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-01-10 06:27:54,378 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-01-10 06:27:54,378 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-01-10 06:27:54,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-01-10 06:27:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-01-10 06:27:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-01-10 06:27:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-01-10 06:27:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-01-10 06:27:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-01-10 06:27:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-01-10 06:27:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-01-10 06:27:54,379 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-01-10 06:27:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:27:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-01-10 06:27:54,380 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-01-10 06:27:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-01-10 06:27:54,380 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-01-10 06:27:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-01-10 06:27:54,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-01-10 06:27:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-01-10 06:27:54,380 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-01-10 06:27:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-01-10 06:27:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-01-10 06:27:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-01-10 06:27:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-01-10 06:27:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:27:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:27:54,638 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:27:54,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:27:55,224 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:27:55,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:27:55,233 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:27:55,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:27:55 BoogieIcfgContainer [2022-01-10 06:27:55,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:27:55,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:27:55,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:27:55,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:27:55,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:27:53" (1/3) ... [2022-01-10 06:27:55,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43590bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:27:55, skipping insertion in model container [2022-01-10 06:27:55,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:27:54" (2/3) ... [2022-01-10 06:27:55,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43590bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:27:55, skipping insertion in model container [2022-01-10 06:27:55,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:27:55" (3/3) ... [2022-01-10 06:27:55,250 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product33.cil.c [2022-01-10 06:27:55,254 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:27:55,254 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:27:55,296 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:27:55,302 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 06:27:55,303 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:27:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 393 states, 302 states have (on average 1.4966887417218544) internal successors, (452), 306 states have internal predecessors, (452), 65 states have call successors, (65), 24 states have call predecessors, (65), 24 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-10 06:27:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-10 06:27:55,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:27:55,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:27:55,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:27:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:27:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash -722514137, now seen corresponding path program 1 times [2022-01-10 06:27:55,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:27:55,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487179742] [2022-01-10 06:27:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:27:55,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:27:55,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:27:55,358 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 06:27:55,359 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 06:27:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:27:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:27:55,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:27:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:27:55,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:27:55,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:27:55,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487179742] [2022-01-10 06:27:55,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487179742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:27:55,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:27:55,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:27:55,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670277384] [2022-01-10 06:27:55,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:27:55,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:27:55,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:27:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:27:55,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:27:55,840 INFO L87 Difference]: Start difference. First operand has 393 states, 302 states have (on average 1.4966887417218544) internal successors, (452), 306 states have internal predecessors, (452), 65 states have call successors, (65), 24 states have call predecessors, (65), 24 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) Second operand has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:27:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:27:55,953 INFO L93 Difference]: Finished difference Result 627 states and 910 transitions. [2022-01-10 06:27:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:27:55,955 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 126 [2022-01-10 06:27:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:27:55,966 INFO L225 Difference]: With dead ends: 627 [2022-01-10 06:27:55,966 INFO L226 Difference]: Without dead ends: 386 [2022-01-10 06:27:55,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 125 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 06:27:55,978 INFO L933 BasicCegarLoop]: 578 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, 578 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 06:27:55,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:27:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-10 06:27:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-01-10 06:27:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 296 states have (on average 1.489864864864865) internal successors, (441), 299 states have internal predecessors, (441), 65 states have call successors, (65), 24 states have call predecessors, (65), 24 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-10 06:27:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 570 transitions. [2022-01-10 06:27:56,063 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 570 transitions. Word has length 126 [2022-01-10 06:27:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:27:56,064 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 570 transitions. [2022-01-10 06:27:56,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:27:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 570 transitions. [2022-01-10 06:27:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-10 06:27:56,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:27:56,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:27:56,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:27:56,280 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 06:27:56,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:27:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:27:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1600743464, now seen corresponding path program 1 times [2022-01-10 06:27:56,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:27:56,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101479721] [2022-01-10 06:27:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:27:56,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:27:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:27:56,283 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 06:27:56,285 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 06:27:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:27:56,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:27:56,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:27:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:27:56,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:27:56,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:27:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101479721] [2022-01-10 06:27:56,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101479721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:27:56,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:27:56,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:27:56,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082994307] [2022-01-10 06:27:56,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:27:56,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:27:56,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:27:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:27:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:27:56,740 INFO L87 Difference]: Start difference. First operand 386 states and 570 transitions. Second operand has 5 states, 4 states have (on average 19.75) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:27:56,827 INFO L93 Difference]: Finished difference Result 763 states and 1130 transitions. [2022-01-10 06:27:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:27:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 19.75) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 127 [2022-01-10 06:27:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:27:56,831 INFO L225 Difference]: With dead ends: 763 [2022-01-10 06:27:56,831 INFO L226 Difference]: Without dead ends: 388 [2022-01-10 06:27:56,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 06:27:56,833 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 133 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2092 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 06:27:56,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 2092 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:27:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-10 06:27:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-01-10 06:27:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 297 states have (on average 1.4882154882154883) internal successors, (442), 301 states have internal predecessors, (442), 65 states have call successors, (65), 24 states have call predecessors, (65), 25 states have return successors, (66), 64 states have call predecessors, (66), 64 states have call successors, (66) [2022-01-10 06:27:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 573 transitions. [2022-01-10 06:27:56,850 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 573 transitions. Word has length 127 [2022-01-10 06:27:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:27:56,850 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 573 transitions. [2022-01-10 06:27:56,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 19.75) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 573 transitions. [2022-01-10 06:27:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-10 06:27:56,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:27:56,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:27:56,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 06:27:57,067 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 06:27:57,067 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:27:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:27:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1649789937, now seen corresponding path program 1 times [2022-01-10 06:27:57,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:27:57,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993856017] [2022-01-10 06:27:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:27:57,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:27:57,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:27:57,070 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 06:27:57,072 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 06:27:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:27:57,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:27:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:27:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:27:57,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:27:57,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:27:57,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993856017] [2022-01-10 06:27:57,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993856017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:27:57,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:27:57,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:27:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298435473] [2022-01-10 06:27:57,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:27:57,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:27:57,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:27:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:27:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:27:57,556 INFO L87 Difference]: Start difference. First operand 388 states and 573 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:27:57,634 INFO L93 Difference]: Finished difference Result 765 states and 1134 transitions. [2022-01-10 06:27:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:27:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 128 [2022-01-10 06:27:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:27:57,640 INFO L225 Difference]: With dead ends: 765 [2022-01-10 06:27:57,640 INFO L226 Difference]: Without dead ends: 390 [2022-01-10 06:27:57,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 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 06:27:57,644 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 132 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 2081 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 06:27:57,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 2081 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:27:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-10 06:27:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-01-10 06:27:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 298 states have (on average 1.4865771812080537) internal successors, (443), 303 states have internal predecessors, (443), 65 states have call successors, (65), 24 states have call predecessors, (65), 26 states have return successors, (70), 64 states have call predecessors, (70), 64 states have call successors, (70) [2022-01-10 06:27:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 578 transitions. [2022-01-10 06:27:57,673 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 578 transitions. Word has length 128 [2022-01-10 06:27:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:27:57,673 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 578 transitions. [2022-01-10 06:27:57,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 578 transitions. [2022-01-10 06:27:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 06:27:57,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:27:57,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:27:57,690 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 06:27:57,890 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 06:27:57,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:27:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:27:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash 199459447, now seen corresponding path program 1 times [2022-01-10 06:27:57,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:27:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112220647] [2022-01-10 06:27:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:27:57,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:27:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:27:57,893 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 06:27:57,895 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 06:27:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:27:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:27:58,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:27:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:27:58,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:27:58,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:27:58,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112220647] [2022-01-10 06:27:58,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112220647] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:27:58,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:27:58,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:27:58,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959136819] [2022-01-10 06:27:58,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:27:58,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:27:58,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:27:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:27:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:27:58,340 INFO L87 Difference]: Start difference. First operand 390 states and 578 transitions. Second operand has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:27:58,384 INFO L93 Difference]: Finished difference Result 757 states and 1124 transitions. [2022-01-10 06:27:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:27:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 129 [2022-01-10 06:27:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:27:58,387 INFO L225 Difference]: With dead ends: 757 [2022-01-10 06:27:58,387 INFO L226 Difference]: Without dead ends: 390 [2022-01-10 06:27:58,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 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 06:27:58,388 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 131 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 2095 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 06:27:58,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 2095 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:27:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-10 06:27:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-01-10 06:27:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 298 states have (on average 1.4865771812080537) internal successors, (443), 303 states have internal predecessors, (443), 65 states have call successors, (65), 24 states have call predecessors, (65), 26 states have return successors, (69), 64 states have call predecessors, (69), 64 states have call successors, (69) [2022-01-10 06:27:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 577 transitions. [2022-01-10 06:27:58,401 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 577 transitions. Word has length 129 [2022-01-10 06:27:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:27:58,401 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 577 transitions. [2022-01-10 06:27:58,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 577 transitions. [2022-01-10 06:27:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 06:27:58,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:27:58,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 06:27:58,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:27:58,615 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 06:27:58,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:27:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:27:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1293898636, now seen corresponding path program 2 times [2022-01-10 06:27:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:27:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490977082] [2022-01-10 06:27:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:27:58,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:27:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:27:58,624 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 06:27:58,625 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 06:27:58,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:27:58,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:27:58,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:27:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:27:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-10 06:27:58,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:27:58,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:27:58,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490977082] [2022-01-10 06:27:58,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490977082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:27:58,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:27:58,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:27:58,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282579526] [2022-01-10 06:27:58,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:27:58,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:27:58,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:27:58,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:27:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:27:58,957 INFO L87 Difference]: Start difference. First operand 390 states and 577 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:27:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:27:58,974 INFO L93 Difference]: Finished difference Result 621 states and 898 transitions. [2022-01-10 06:27:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:27:58,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 130 [2022-01-10 06:27:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:27:58,977 INFO L225 Difference]: With dead ends: 621 [2022-01-10 06:27:58,978 INFO L226 Difference]: Without dead ends: 393 [2022-01-10 06:27:58,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 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 06:27:58,980 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 1 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1134 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 06:27:58,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1134 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:27:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-10 06:27:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 392. [2022-01-10 06:27:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 300 states have (on average 1.4833333333333334) internal successors, (445), 305 states have internal predecessors, (445), 65 states have call successors, (65), 24 states have call predecessors, (65), 26 states have return successors, (69), 64 states have call predecessors, (69), 64 states have call successors, (69) [2022-01-10 06:27:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 579 transitions. [2022-01-10 06:27:58,995 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 579 transitions. Word has length 130 [2022-01-10 06:27:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:27:58,996 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 579 transitions. [2022-01-10 06:27:58,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:27:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 579 transitions. [2022-01-10 06:27:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-10 06:27:58,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:27:58,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 06:27:59,020 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 06:27:59,208 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 06:27:59,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:27:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:27:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1770158872, now seen corresponding path program 1 times [2022-01-10 06:27:59,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:27:59,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621934152] [2022-01-10 06:27:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:27:59,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:27:59,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:27:59,296 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 06:27:59,298 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 06:27:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:27:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:27:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:27:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 06:27:59,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:27:59,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:27:59,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621934152] [2022-01-10 06:27:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621934152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:27:59,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:27:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:27:59,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468281684] [2022-01-10 06:27:59,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:27:59,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:27:59,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:27:59,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:27:59,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:27:59,680 INFO L87 Difference]: Start difference. First operand 392 states and 579 transitions. Second operand has 5 states, 4 states have (on average 22.25) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:27:59,726 INFO L93 Difference]: Finished difference Result 763 states and 1131 transitions. [2022-01-10 06:27:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:27:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 22.25) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 139 [2022-01-10 06:27:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:27:59,729 INFO L225 Difference]: With dead ends: 763 [2022-01-10 06:27:59,729 INFO L226 Difference]: Without dead ends: 394 [2022-01-10 06:27:59,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 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 06:27:59,731 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 129 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2097 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 06:27:59,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2097 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:27:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-10 06:27:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-01-10 06:27:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 301 states have (on average 1.4817275747508305) internal successors, (446), 307 states have internal predecessors, (446), 65 states have call successors, (65), 24 states have call predecessors, (65), 27 states have return successors, (71), 64 states have call predecessors, (71), 64 states have call successors, (71) [2022-01-10 06:27:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 582 transitions. [2022-01-10 06:27:59,743 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 582 transitions. Word has length 139 [2022-01-10 06:27:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:27:59,743 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 582 transitions. [2022-01-10 06:27:59,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 22.25) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:27:59,743 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 582 transitions. [2022-01-10 06:27:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 06:27:59,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:27:59,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 06:27:59,758 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 06:27:59,956 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 06:27:59,957 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:27:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:27:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash -662762026, now seen corresponding path program 1 times [2022-01-10 06:27:59,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:27:59,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941221283] [2022-01-10 06:27:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:27:59,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:27:59,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:27:59,976 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 06:27:59,992 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 06:28:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:28:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 06:28:00,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:00,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:00,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941221283] [2022-01-10 06:28:00,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941221283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:00,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:28:00,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388442290] [2022-01-10 06:28:00,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:00,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:28:00,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:28:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:28:00,434 INFO L87 Difference]: Start difference. First operand 394 states and 582 transitions. Second operand has 5 states, 4 states have (on average 22.5) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:00,501 INFO L93 Difference]: Finished difference Result 765 states and 1134 transitions. [2022-01-10 06:28:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:28:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 22.5) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 140 [2022-01-10 06:28:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:00,512 INFO L225 Difference]: With dead ends: 765 [2022-01-10 06:28:00,512 INFO L226 Difference]: Without dead ends: 396 [2022-01-10 06:28:00,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 06:28:00,513 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 129 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:28:00,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2095 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-10 06:28:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 394. [2022-01-10 06:28:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 301 states have (on average 1.4817275747508305) internal successors, (446), 307 states have internal predecessors, (446), 65 states have call successors, (65), 24 states have call predecessors, (65), 27 states have return successors, (71), 64 states have call predecessors, (71), 64 states have call successors, (71) [2022-01-10 06:28:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 582 transitions. [2022-01-10 06:28:00,523 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 582 transitions. Word has length 140 [2022-01-10 06:28:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:00,523 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 582 transitions. [2022-01-10 06:28:00,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 22.5) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 582 transitions. [2022-01-10 06:28:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 06:28:00,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:00,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 06:28:00,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:28:00,735 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 06:28:00,735 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2052056040, now seen corresponding path program 1 times [2022-01-10 06:28:00,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:00,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184286574] [2022-01-10 06:28:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:00,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:00,751 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 06:28:00,752 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 06:28:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:01,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:28:01,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:28:01,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:01,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:01,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184286574] [2022-01-10 06:28:01,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184286574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:01,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:01,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:28:01,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500036464] [2022-01-10 06:28:01,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:01,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:28:01,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:28:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:28:01,157 INFO L87 Difference]: Start difference. First operand 394 states and 582 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:01,208 INFO L93 Difference]: Finished difference Result 761 states and 1126 transitions. [2022-01-10 06:28:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:28:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 140 [2022-01-10 06:28:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:01,210 INFO L225 Difference]: With dead ends: 761 [2022-01-10 06:28:01,210 INFO L226 Difference]: Without dead ends: 394 [2022-01-10 06:28:01,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:28:01,212 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 130 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2084 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 06:28:01,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 2084 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-10 06:28:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-01-10 06:28:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 301 states have (on average 1.4817275747508305) internal successors, (446), 307 states have internal predecessors, (446), 65 states have call successors, (65), 24 states have call predecessors, (65), 27 states have return successors, (70), 64 states have call predecessors, (70), 64 states have call successors, (70) [2022-01-10 06:28:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 581 transitions. [2022-01-10 06:28:01,221 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 581 transitions. Word has length 140 [2022-01-10 06:28:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:01,222 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 581 transitions. [2022-01-10 06:28:01,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 581 transitions. [2022-01-10 06:28:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-10 06:28:01,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:01,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 06:28:01,247 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 06:28:01,433 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 06:28:01,434 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1884539122, now seen corresponding path program 2 times [2022-01-10 06:28:01,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:01,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559161021] [2022-01-10 06:28:01,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:28:01,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:01,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:01,436 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 06:28:01,440 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 06:28:01,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:28:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:28:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:28:01,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:28:01,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:01,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559161021] [2022-01-10 06:28:01,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559161021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:01,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:01,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:28:01,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569525438] [2022-01-10 06:28:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:01,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:28:01,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:28:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:28:01,800 INFO L87 Difference]: Start difference. First operand 394 states and 581 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:01,857 INFO L93 Difference]: Finished difference Result 763 states and 1131 transitions. [2022-01-10 06:28:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:28:01,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 141 [2022-01-10 06:28:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:01,860 INFO L225 Difference]: With dead ends: 763 [2022-01-10 06:28:01,860 INFO L226 Difference]: Without dead ends: 396 [2022-01-10 06:28:01,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 06:28:01,862 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 128 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2086 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 06:28:01,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 2086 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-10 06:28:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2022-01-10 06:28:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 302 states have (on average 1.4801324503311257) internal successors, (447), 309 states have internal predecessors, (447), 65 states have call successors, (65), 24 states have call predecessors, (65), 28 states have return successors, (74), 64 states have call predecessors, (74), 64 states have call successors, (74) [2022-01-10 06:28:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 586 transitions. [2022-01-10 06:28:01,874 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 586 transitions. Word has length 141 [2022-01-10 06:28:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:01,875 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 586 transitions. [2022-01-10 06:28:01,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 586 transitions. [2022-01-10 06:28:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-10 06:28:01,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:01,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 06:28:01,904 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 06:28:02,087 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 06:28:02,087 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1106103309, now seen corresponding path program 1 times [2022-01-10 06:28:02,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280445664] [2022-01-10 06:28:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:02,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:02,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:02,090 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 06:28:02,105 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 06:28:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:02,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:02,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:02,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280445664] [2022-01-10 06:28:02,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280445664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:02,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:02,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:02,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980441211] [2022-01-10 06:28:02,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:02,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:02,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:02,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:02,475 INFO L87 Difference]: Start difference. First operand 396 states and 586 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:02,503 INFO L93 Difference]: Finished difference Result 823 states and 1233 transitions. [2022-01-10 06:28:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 142 [2022-01-10 06:28:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:02,506 INFO L225 Difference]: With dead ends: 823 [2022-01-10 06:28:02,506 INFO L226 Difference]: Without dead ends: 458 [2022-01-10 06:28:02,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 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 06:28:02,507 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 115 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1115 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 06:28:02,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1115 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-10 06:28:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 450. [2022-01-10 06:28:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 345 states have (on average 1.4985507246376812) internal successors, (517), 352 states have internal predecessors, (517), 76 states have call successors, (76), 24 states have call predecessors, (76), 28 states have return successors, (87), 75 states have call predecessors, (87), 75 states have call successors, (87) [2022-01-10 06:28:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 680 transitions. [2022-01-10 06:28:02,519 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 680 transitions. Word has length 142 [2022-01-10 06:28:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:02,519 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 680 transitions. [2022-01-10 06:28:02,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 680 transitions. [2022-01-10 06:28:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 06:28:02,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:02,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 06:28:02,547 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 06:28:02,731 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 06:28:02,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1771103988, now seen corresponding path program 1 times [2022-01-10 06:28:02,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136332490] [2022-01-10 06:28:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:02,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:02,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:02,734 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 06:28:02,735 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 06:28:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:02,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:28:02,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:28:03,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:03,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136332490] [2022-01-10 06:28:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136332490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:03,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:03,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:28:03,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846514628] [2022-01-10 06:28:03,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:03,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:28:03,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:03,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:28:03,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:28:03,149 INFO L87 Difference]: Start difference. First operand 450 states and 680 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:03,233 INFO L93 Difference]: Finished difference Result 1020 states and 1564 transitions. [2022-01-10 06:28:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:28:03,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 143 [2022-01-10 06:28:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:03,236 INFO L225 Difference]: With dead ends: 1020 [2022-01-10 06:28:03,236 INFO L226 Difference]: Without dead ends: 599 [2022-01-10 06:28:03,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:28:03,238 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 664 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:28:03,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 1301 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:28:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-10 06:28:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 458. [2022-01-10 06:28:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 352 states have (on average 1.4857954545454546) internal successors, (523), 358 states have internal predecessors, (523), 76 states have call successors, (76), 26 states have call predecessors, (76), 29 states have return successors, (83), 75 states have call predecessors, (83), 75 states have call successors, (83) [2022-01-10 06:28:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 682 transitions. [2022-01-10 06:28:03,252 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 682 transitions. Word has length 143 [2022-01-10 06:28:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:03,253 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 682 transitions. [2022-01-10 06:28:03,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:28:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 682 transitions. [2022-01-10 06:28:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-10 06:28:03,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:03,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:03,285 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 06:28:03,465 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 06:28:03,466 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash -451091524, now seen corresponding path program 1 times [2022-01-10 06:28:03,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:03,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835763651] [2022-01-10 06:28:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:03,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:03,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:03,468 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 06:28:03,486 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 06:28:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:03,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:28:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:03,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:28:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:04,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835763651] [2022-01-10 06:28:04,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835763651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:28:04,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:28:04,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:28:04,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849971149] [2022-01-10 06:28:04,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:28:04,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:28:04,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:28:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:28:04,017 INFO L87 Difference]: Start difference. First operand 458 states and 682 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-01-10 06:28:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:04,240 INFO L93 Difference]: Finished difference Result 1058 states and 1628 transitions. [2022-01-10 06:28:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:28:04,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 144 [2022-01-10 06:28:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:04,245 INFO L225 Difference]: With dead ends: 1058 [2022-01-10 06:28:04,245 INFO L226 Difference]: Without dead ends: 830 [2022-01-10 06:28:04,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 282 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 06:28:04,247 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 489 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2490 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:28:04,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 2490 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:28:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-01-10 06:28:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 806. [2022-01-10 06:28:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 636 states have (on average 1.5424528301886793) internal successors, (981), 642 states have internal predecessors, (981), 140 states have call successors, (140), 26 states have call predecessors, (140), 29 states have return successors, (157), 139 states have call predecessors, (157), 139 states have call successors, (157) [2022-01-10 06:28:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1278 transitions. [2022-01-10 06:28:04,298 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1278 transitions. Word has length 144 [2022-01-10 06:28:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:04,298 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1278 transitions. [2022-01-10 06:28:04,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-01-10 06:28:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1278 transitions. [2022-01-10 06:28:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 06:28:04,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:04,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:04,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 06:28:04,512 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 06:28:04,513 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1855806362, now seen corresponding path program 1 times [2022-01-10 06:28:04,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:04,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705840913] [2022-01-10 06:28:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:04,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:04,515 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 06:28:04,516 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 06:28:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:04,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:04,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:04,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705840913] [2022-01-10 06:28:04,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705840913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:04,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:04,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:04,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281687400] [2022-01-10 06:28:04,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:04,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:04,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:04,926 INFO L87 Difference]: Start difference. First operand 806 states and 1278 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:04,979 INFO L93 Difference]: Finished difference Result 1859 states and 3010 transitions. [2022-01-10 06:28:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 146 [2022-01-10 06:28:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:04,984 INFO L225 Difference]: With dead ends: 1859 [2022-01-10 06:28:04,984 INFO L226 Difference]: Without dead ends: 1139 [2022-01-10 06:28:04,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 144 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 06:28:04,987 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 109 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1146 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 06:28:04,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1146 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-01-10 06:28:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1131. [2022-01-10 06:28:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 897 states have (on average 1.5674470457079153) internal successors, (1406), 903 states have internal predecessors, (1406), 204 states have call successors, (204), 26 states have call predecessors, (204), 29 states have return successors, (231), 203 states have call predecessors, (231), 203 states have call successors, (231) [2022-01-10 06:28:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1841 transitions. [2022-01-10 06:28:05,034 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1841 transitions. Word has length 146 [2022-01-10 06:28:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:05,035 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1841 transitions. [2022-01-10 06:28:05,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1841 transitions. [2022-01-10 06:28:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 06:28:05,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:05,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:05,051 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 06:28:05,249 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 06:28:05,249 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash -995460552, now seen corresponding path program 1 times [2022-01-10 06:28:05,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:05,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008802892] [2022-01-10 06:28:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:05,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:05,264 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 06:28:05,264 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 06:28:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:05,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:05,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:05,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008802892] [2022-01-10 06:28:05,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008802892] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:05,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:05,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:05,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463119637] [2022-01-10 06:28:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:05,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:05,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:05,661 INFO L87 Difference]: Start difference. First operand 1131 states and 1841 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:05,730 INFO L93 Difference]: Finished difference Result 2659 states and 4363 transitions. [2022-01-10 06:28:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 147 [2022-01-10 06:28:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:05,737 INFO L225 Difference]: With dead ends: 2659 [2022-01-10 06:28:05,738 INFO L226 Difference]: Without dead ends: 1667 [2022-01-10 06:28:05,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 06:28:05,741 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 107 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1146 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 06:28:05,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1146 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:05,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-01-10 06:28:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1659. [2022-01-10 06:28:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1330 states have (on average 1.5766917293233083) internal successors, (2097), 1336 states have internal predecessors, (2097), 299 states have call successors, (299), 26 states have call predecessors, (299), 29 states have return successors, (326), 298 states have call predecessors, (326), 298 states have call successors, (326) [2022-01-10 06:28:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2722 transitions. [2022-01-10 06:28:05,817 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2722 transitions. Word has length 147 [2022-01-10 06:28:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:05,817 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 2722 transitions. [2022-01-10 06:28:05,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2722 transitions. [2022-01-10 06:28:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 06:28:05,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:05,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:05,836 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 06:28:06,035 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 06:28:06,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash -158490932, now seen corresponding path program 1 times [2022-01-10 06:28:06,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873140000] [2022-01-10 06:28:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:06,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:06,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:06,038 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 06:28:06,040 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 06:28:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:06,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:06,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:06,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:06,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:06,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873140000] [2022-01-10 06:28:06,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873140000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:06,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:06,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:06,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306496581] [2022-01-10 06:28:06,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:06,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:06,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:06,471 INFO L87 Difference]: Start difference. First operand 1659 states and 2722 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:06,572 INFO L93 Difference]: Finished difference Result 3855 states and 6382 transitions. [2022-01-10 06:28:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 148 [2022-01-10 06:28:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:06,583 INFO L225 Difference]: With dead ends: 3855 [2022-01-10 06:28:06,583 INFO L226 Difference]: Without dead ends: 2468 [2022-01-10 06:28:06,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 146 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 06:28:06,590 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 105 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1133 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 06:28:06,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1133 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2022-01-10 06:28:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 2460. [2022-01-10 06:28:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2008 states have (on average 1.5836653386454183) internal successors, (3180), 2014 states have internal predecessors, (3180), 422 states have call successors, (422), 26 states have call predecessors, (422), 29 states have return successors, (465), 421 states have call predecessors, (465), 421 states have call successors, (465) [2022-01-10 06:28:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 4067 transitions. [2022-01-10 06:28:06,694 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 4067 transitions. Word has length 148 [2022-01-10 06:28:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:06,694 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 4067 transitions. [2022-01-10 06:28:06,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 4067 transitions. [2022-01-10 06:28:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-10 06:28:06,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:06,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:06,729 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 06:28:06,915 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 06:28:06,915 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1156685385, now seen corresponding path program 1 times [2022-01-10 06:28:06,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:06,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147651681] [2022-01-10 06:28:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:06,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:06,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:06,917 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 06:28:06,926 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 06:28:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:07,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:07,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:07,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147651681] [2022-01-10 06:28:07,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147651681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:07,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:07,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:07,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625951374] [2022-01-10 06:28:07,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:07,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:07,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:07,311 INFO L87 Difference]: Start difference. First operand 2460 states and 4067 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:07,447 INFO L93 Difference]: Finished difference Result 5721 states and 9531 transitions. [2022-01-10 06:28:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:07,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 149 [2022-01-10 06:28:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:07,464 INFO L225 Difference]: With dead ends: 5721 [2022-01-10 06:28:07,465 INFO L226 Difference]: Without dead ends: 3749 [2022-01-10 06:28:07,473 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 06:28:07,473 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 103 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1133 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 06:28:07,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 1133 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-01-10 06:28:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3741. [2022-01-10 06:28:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3110 states have (on average 1.5881028938906752) internal successors, (4939), 3116 states have internal predecessors, (4939), 601 states have call successors, (601), 26 states have call predecessors, (601), 29 states have return successors, (670), 600 states have call predecessors, (670), 600 states have call successors, (670) [2022-01-10 06:28:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 6210 transitions. [2022-01-10 06:28:07,680 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 6210 transitions. Word has length 149 [2022-01-10 06:28:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:07,680 INFO L470 AbstractCegarLoop]: Abstraction has 3741 states and 6210 transitions. [2022-01-10 06:28:07,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 6210 transitions. [2022-01-10 06:28:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-10 06:28:07,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:07,692 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:07,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:28:07,903 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 06:28:07,903 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:07,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash 695739792, now seen corresponding path program 1 times [2022-01-10 06:28:07,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:07,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967727434] [2022-01-10 06:28:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:07,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:07,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:07,910 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 06:28:07,911 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 06:28:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:08,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:08,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:08,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967727434] [2022-01-10 06:28:08,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967727434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:08,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:08,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:08,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515778201] [2022-01-10 06:28:08,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:08,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:08,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:08,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:08,293 INFO L87 Difference]: Start difference. First operand 3741 states and 6210 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:08,487 INFO L93 Difference]: Finished difference Result 8793 states and 14702 transitions. [2022-01-10 06:28:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 150 [2022-01-10 06:28:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:08,514 INFO L225 Difference]: With dead ends: 8793 [2022-01-10 06:28:08,515 INFO L226 Difference]: Without dead ends: 5868 [2022-01-10 06:28:08,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 148 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 06:28:08,527 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 101 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1142 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 06:28:08,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1142 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2022-01-10 06:28:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5860. [2022-01-10 06:28:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5860 states, 4853 states have (on average 1.5823202143004327) internal successors, (7679), 4859 states have internal predecessors, (7679), 977 states have call successors, (977), 26 states have call predecessors, (977), 29 states have return successors, (1090), 976 states have call predecessors, (1090), 976 states have call successors, (1090) [2022-01-10 06:28:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5860 states to 5860 states and 9746 transitions. [2022-01-10 06:28:08,825 INFO L78 Accepts]: Start accepts. Automaton has 5860 states and 9746 transitions. Word has length 150 [2022-01-10 06:28:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:08,825 INFO L470 AbstractCegarLoop]: Abstraction has 5860 states and 9746 transitions. [2022-01-10 06:28:08,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 5860 states and 9746 transitions. [2022-01-10 06:28:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-10 06:28:08,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:08,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:08,856 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 06:28:09,055 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 06:28:09,056 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash -812124429, now seen corresponding path program 1 times [2022-01-10 06:28:09,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:09,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100323133] [2022-01-10 06:28:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:09,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:09,058 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 06:28:09,060 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 06:28:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:09,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:09,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:09,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100323133] [2022-01-10 06:28:09,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100323133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:09,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:09,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:09,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229897296] [2022-01-10 06:28:09,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:09,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:09,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:09,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:09,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:09,486 INFO L87 Difference]: Start difference. First operand 5860 states and 9746 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:09,922 INFO L93 Difference]: Finished difference Result 14354 states and 24036 transitions. [2022-01-10 06:28:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 151 [2022-01-10 06:28:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:09,973 INFO L225 Difference]: With dead ends: 14354 [2022-01-10 06:28:09,973 INFO L226 Difference]: Without dead ends: 9707 [2022-01-10 06:28:09,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 06:28:09,990 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 99 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1140 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 06:28:09,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1140 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9707 states. [2022-01-10 06:28:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9707 to 9699. [2022-01-10 06:28:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9699 states, 8086 states have (on average 1.5806331931733861) internal successors, (12781), 8092 states have internal predecessors, (12781), 1583 states have call successors, (1583), 26 states have call predecessors, (1583), 29 states have return successors, (1774), 1582 states have call predecessors, (1774), 1582 states have call successors, (1774) [2022-01-10 06:28:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 16138 transitions. [2022-01-10 06:28:10,493 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 16138 transitions. Word has length 151 [2022-01-10 06:28:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:10,494 INFO L470 AbstractCegarLoop]: Abstraction has 9699 states and 16138 transitions. [2022-01-10 06:28:10,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 16138 transitions. [2022-01-10 06:28:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 06:28:10,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:10,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 06:28:10,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:28:10,730 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 06:28:10,730 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash -818656670, now seen corresponding path program 1 times [2022-01-10 06:28:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430938479] [2022-01-10 06:28:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:10,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:10,732 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 06:28:10,749 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 06:28:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:11,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:11,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:11,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430938479] [2022-01-10 06:28:11,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430938479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:11,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:11,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:11,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47822261] [2022-01-10 06:28:11,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:11,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:11,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:11,209 INFO L87 Difference]: Start difference. First operand 9699 states and 16138 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:11,854 INFO L93 Difference]: Finished difference Result 24958 states and 41721 transitions. [2022-01-10 06:28:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:11,855 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2022-01-10 06:28:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:11,897 INFO L225 Difference]: With dead ends: 24958 [2022-01-10 06:28:11,897 INFO L226 Difference]: Without dead ends: 16948 [2022-01-10 06:28:11,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 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 06:28:11,921 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 97 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1146 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 06:28:11,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1146 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16948 states. [2022-01-10 06:28:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16948 to 16940. [2022-01-10 06:28:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16940 states, 14124 states have (on average 1.5725715094873973) internal successors, (22211), 14130 states have internal predecessors, (22211), 2786 states have call successors, (2786), 26 states have call predecessors, (2786), 29 states have return successors, (3121), 2785 states have call predecessors, (3121), 2785 states have call successors, (3121) [2022-01-10 06:28:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16940 states to 16940 states and 28118 transitions. [2022-01-10 06:28:12,789 INFO L78 Accepts]: Start accepts. Automaton has 16940 states and 28118 transitions. Word has length 152 [2022-01-10 06:28:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:12,789 INFO L470 AbstractCegarLoop]: Abstraction has 16940 states and 28118 transitions. [2022-01-10 06:28:12,789 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 16940 states and 28118 transitions. [2022-01-10 06:28:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-10 06:28:12,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:12,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2022-01-10 06:28:12,843 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 06:28:13,028 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 06:28:13,028 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash 836374866, now seen corresponding path program 1 times [2022-01-10 06:28:13,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985139175] [2022-01-10 06:28:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:13,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:13,031 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 06:28:13,072 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 06:28:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:13,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:13,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985139175] [2022-01-10 06:28:13,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985139175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:13,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:13,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:13,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443357100] [2022-01-10 06:28:13,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:13,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:13,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:13,440 INFO L87 Difference]: Start difference. First operand 16940 states and 28118 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:14,534 INFO L93 Difference]: Finished difference Result 44732 states and 74588 transitions. [2022-01-10 06:28:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:14,535 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 153 [2022-01-10 06:28:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:14,671 INFO L225 Difference]: With dead ends: 44732 [2022-01-10 06:28:14,671 INFO L226 Difference]: Without dead ends: 30151 [2022-01-10 06:28:14,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 06:28:14,716 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 95 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1138 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 06:28:14,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1138 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30151 states. [2022-01-10 06:28:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30151 to 30143. [2022-01-10 06:28:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30143 states, 25288 states have (on average 1.5684514394179057) internal successors, (39663), 25294 states have internal predecessors, (39663), 4825 states have call successors, (4825), 26 states have call predecessors, (4825), 29 states have return successors, (5434), 4824 states have call predecessors, (5434), 4824 states have call successors, (5434) [2022-01-10 06:28:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30143 states to 30143 states and 49922 transitions. [2022-01-10 06:28:16,331 INFO L78 Accepts]: Start accepts. Automaton has 30143 states and 49922 transitions. Word has length 153 [2022-01-10 06:28:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 30143 states and 49922 transitions. [2022-01-10 06:28:16,332 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30143 states and 49922 transitions. [2022-01-10 06:28:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-10 06:28:16,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:16,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2022-01-10 06:28:16,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:28:16,585 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 06:28:16,585 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1472805952, now seen corresponding path program 1 times [2022-01-10 06:28:16,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:16,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220847623] [2022-01-10 06:28:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:16,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:16,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:16,600 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 06:28:16,601 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 06:28:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:17,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:17,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220847623] [2022-01-10 06:28:17,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220847623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:17,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:17,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:17,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617419941] [2022-01-10 06:28:17,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:17,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:17,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:17,210 INFO L87 Difference]: Start difference. First operand 30143 states and 49922 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:19,166 INFO L93 Difference]: Finished difference Result 82074 states and 136395 transitions. [2022-01-10 06:28:19,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:19,166 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 154 [2022-01-10 06:28:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:19,381 INFO L225 Difference]: With dead ends: 82074 [2022-01-10 06:28:19,382 INFO L226 Difference]: Without dead ends: 55094 [2022-01-10 06:28:19,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 152 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 06:28:19,464 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 93 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1138 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 06:28:19,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1138 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55094 states. [2022-01-10 06:28:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55094 to 55086. [2022-01-10 06:28:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55086 states, 46516 states have (on average 1.5628170951930518) internal successors, (72696), 46522 states have internal predecessors, (72696), 8540 states have call successors, (8540), 26 states have call predecessors, (8540), 29 states have return successors, (9681), 8539 states have call predecessors, (9681), 8539 states have call successors, (9681) [2022-01-10 06:28:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55086 states to 55086 states and 90917 transitions. [2022-01-10 06:28:22,429 INFO L78 Accepts]: Start accepts. Automaton has 55086 states and 90917 transitions. Word has length 154 [2022-01-10 06:28:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:22,429 INFO L470 AbstractCegarLoop]: Abstraction has 55086 states and 90917 transitions. [2022-01-10 06:28:22,429 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 55086 states and 90917 transitions. [2022-01-10 06:28:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 06:28:22,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:22,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1] [2022-01-10 06:28:22,503 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 06:28:22,703 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 06:28:22,703 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash -679154510, now seen corresponding path program 1 times [2022-01-10 06:28:22,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:22,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331351432] [2022-01-10 06:28:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:22,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:22,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:22,705 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 06:28:22,707 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 06:28:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:28:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 06:28:23,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:28:23,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331351432] [2022-01-10 06:28:23,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331351432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:28:23,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:28:23,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:28:23,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974858328] [2022-01-10 06:28:23,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:28:23,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:28:23,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:23,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:28:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:28:23,106 INFO L87 Difference]: Start difference. First operand 55086 states and 90917 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:26,820 INFO L93 Difference]: Finished difference Result 102873 states and 170041 transitions. [2022-01-10 06:28:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:28:26,821 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 155 [2022-01-10 06:28:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:27,224 INFO L225 Difference]: With dead ends: 102873 [2022-01-10 06:28:27,224 INFO L226 Difference]: Without dead ends: 102645 [2022-01-10 06:28:27,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 06:28:27,273 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 91 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1138 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 06:28:27,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1138 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:28:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102645 states. [2022-01-10 06:28:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102645 to 102637. [2022-01-10 06:28:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102637 states, 87268 states have (on average 1.555644680753541) internal successors, (135758), 87274 states have internal predecessors, (135758), 15339 states have call successors, (15339), 26 states have call predecessors, (15339), 29 states have return successors, (17526), 15338 states have call predecessors, (17526), 15338 states have call successors, (17526) [2022-01-10 06:28:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102637 states to 102637 states and 168623 transitions. [2022-01-10 06:28:32,671 INFO L78 Accepts]: Start accepts. Automaton has 102637 states and 168623 transitions. Word has length 155 [2022-01-10 06:28:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:28:32,671 INFO L470 AbstractCegarLoop]: Abstraction has 102637 states and 168623 transitions. [2022-01-10 06:28:32,671 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 06:28:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 102637 states and 168623 transitions. [2022-01-10 06:28:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 06:28:32,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:28:32,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-01-10 06:28:32,968 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 06:28:33,168 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 06:28:33,168 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:28:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:28:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 938477153, now seen corresponding path program 1 times [2022-01-10 06:28:33,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:28:33,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799850922] [2022-01-10 06:28:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:28:33,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:28:33,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:28:33,171 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 06:28:33,172 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 06:28:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:28:33,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:28:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:28:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:28:33,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:28:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:28:34,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:28:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799850922] [2022-01-10 06:28:34,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799850922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:28:34,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:28:34,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 06:28:34,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120858028] [2022-01-10 06:28:34,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:28:34,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:28:34,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:28:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:28:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:28:34,087 INFO L87 Difference]: Start difference. First operand 102637 states and 168623 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 14 states have internal predecessors, (189), 4 states have call successors, (36), 6 states have call predecessors, (36), 9 states have return successors, (33), 6 states have call predecessors, (33), 4 states have call successors, (33) [2022-01-10 06:28:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:28:50,480 INFO L93 Difference]: Finished difference Result 302142 states and 503036 transitions. [2022-01-10 06:28:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:28:50,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 14 states have internal predecessors, (189), 4 states have call successors, (36), 6 states have call predecessors, (36), 9 states have return successors, (33), 6 states have call predecessors, (33), 4 states have call successors, (33) Word has length 156 [2022-01-10 06:28:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:28:52,197 INFO L225 Difference]: With dead ends: 302142 [2022-01-10 06:28:52,197 INFO L226 Difference]: Without dead ends: 301922 [2022-01-10 06:28:52,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:28:52,328 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 2055 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 6490 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 7324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 6490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:28:52,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 3208 Invalid, 7324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 6490 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-10 06:28:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301922 states.