/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/product-lines/email_spec0_product05.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:18:55,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:18:55,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:18:55,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:18:55,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:18:55,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:18:55,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:18:55,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:18:55,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:18:55,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:18:55,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:18:55,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:18:55,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:18:55,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:18:55,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:18:55,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:18:55,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:18:55,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:18:55,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:18:55,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:18:55,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:18:55,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:18:55,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:18:55,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:18:55,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:18:55,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:18:55,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:18:55,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:18:55,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:18:55,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:18:55,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:18:55,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:18:55,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:18:55,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:18:55,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:18:55,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:18:55,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:18:55,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:18:55,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:18:55,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:18:55,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:18:55,859 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 06:18:55,888 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:18:55,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:18:55,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:18:55,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:18:55,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:18:55,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:18:55,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:18:55,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:18:55,890 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:18:55,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:18:55,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:18:55,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:18:55,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:18:55,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:18:55,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:18:55,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:18:55,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:18:56,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:18:56,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:18:56,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:18:56,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:18:56,076 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:18:56,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec0_product05.cil.c [2022-01-10 06:18:56,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5762ee464/7bec2bd2e7114cea82a955b62f004ad3/FLAGc120af945 [2022-01-10 06:18:56,548 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:18:56,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product05.cil.c [2022-01-10 06:18:56,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5762ee464/7bec2bd2e7114cea82a955b62f004ad3/FLAGc120af945 [2022-01-10 06:18:56,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5762ee464/7bec2bd2e7114cea82a955b62f004ad3 [2022-01-10 06:18:56,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:18:56,571 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:18:56,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:18:56,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:18:56,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:18:56,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:18:56" (1/1) ... [2022-01-10 06:18:56,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc54319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:56, skipping insertion in model container [2022-01-10 06:18:56,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:18:56" (1/1) ... [2022-01-10 06:18:56,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:18:56,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:18:56,786 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product05.cil.c[4289,4302] [2022-01-10 06:18:56,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:18:56,931 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:18:56,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:18:56,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product05.cil.c[4289,4302] [2022-01-10 06:18:56,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:18:57,001 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:18:57,010 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product05.cil.c[4289,4302] [2022-01-10 06:18:57,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:18:57,059 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:18:57,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57 WrapperNode [2022-01-10 06:18:57,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:18:57,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:18:57,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:18:57,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:18:57,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,129 INFO L137 Inliner]: procedures = 109, calls = 125, calls flagged for inlining = 37, calls inlined = 30, statements flattened = 550 [2022-01-10 06:18:57,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:18:57,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:18:57,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:18:57,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:18:57,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:18:57,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:18:57,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:18:57,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:18:57,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (1/1) ... [2022-01-10 06:18:57,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:18:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:18:57,191 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 06:18:57,203 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 06:18:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-01-10 06:18:57,225 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-01-10 06:18:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-01-10 06:18:57,225 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-01-10 06:18:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-01-10 06:18:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-01-10 06:18:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-01-10 06:18:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-01-10 06:18:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-01-10 06:18:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-01-10 06:18:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:18:57,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:18:57,364 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:18:57,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:18:57,742 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:18:57,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:18:57,747 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:18:57,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:18:57 BoogieIcfgContainer [2022-01-10 06:18:57,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:18:57,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:18:57,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:18:57,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:18:57,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:18:56" (1/3) ... [2022-01-10 06:18:57,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0081ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:18:57, skipping insertion in model container [2022-01-10 06:18:57,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:18:57" (2/3) ... [2022-01-10 06:18:57,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0081ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:18:57, skipping insertion in model container [2022-01-10 06:18:57,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:18:57" (3/3) ... [2022-01-10 06:18:57,758 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product05.cil.c [2022-01-10 06:18:57,762 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:18:57,762 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:18:57,804 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:18:57,809 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 06:18:57,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:18:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 110 states have internal predecessors, (160), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 06:18:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:18:57,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:57,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 06:18:57,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash -222738457, now seen corresponding path program 1 times [2022-01-10 06:18:57,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:57,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459082455] [2022-01-10 06:18:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:57,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:57,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:57,867 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 06:18:57,868 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 06:18:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:18:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:18:58,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:58,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:58,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459082455] [2022-01-10 06:18:58,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459082455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:58,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:58,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:18:58,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263299547] [2022-01-10 06:18:58,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:58,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:18:58,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:58,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:18:58,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:18:58,301 INFO L87 Difference]: Start difference. First operand has 131 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 110 states have internal predecessors, (160), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:18:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:58,340 INFO L93 Difference]: Finished difference Result 212 states and 295 transitions. [2022-01-10 06:18:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:18:58,343 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2022-01-10 06:18:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:58,353 INFO L225 Difference]: With dead ends: 212 [2022-01-10 06:18:58,353 INFO L226 Difference]: Without dead ends: 124 [2022-01-10 06:18:58,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 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 06:18:58,363 INFO L933 BasicCegarLoop]: 184 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, 184 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 06:18:58,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-10 06:18:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-01-10 06:18:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 102 states have (on average 1.4607843137254901) internal successors, (149), 103 states have internal predecessors, (149), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 06:18:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 176 transitions. [2022-01-10 06:18:58,401 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 176 transitions. Word has length 75 [2022-01-10 06:18:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:58,402 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 176 transitions. [2022-01-10 06:18:58,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:18:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 176 transitions. [2022-01-10 06:18:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:18:58,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:58,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-10 06:18:58,418 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 06:18:58,618 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 06:18:58,618 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash 61296615, now seen corresponding path program 1 times [2022-01-10 06:18:58,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:58,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050908515] [2022-01-10 06:18:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:58,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:58,626 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 06:18:58,628 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 06:18:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:58,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:18:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:18:58,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:58,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050908515] [2022-01-10 06:18:58,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050908515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:58,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:58,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:18:58,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366791753] [2022-01-10 06:18:58,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:58,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:18:58,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:18:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:18:58,973 INFO L87 Difference]: Start difference. First operand 124 states and 176 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:18:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:59,015 INFO L93 Difference]: Finished difference Result 241 states and 345 transitions. [2022-01-10 06:18:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:18:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 76 [2022-01-10 06:18:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:59,017 INFO L225 Difference]: With dead ends: 241 [2022-01-10 06:18:59,018 INFO L226 Difference]: Without dead ends: 126 [2022-01-10 06:18:59,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 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 06:18:59,019 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 73 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 592 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 06:18:59,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 592 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-10 06:18:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-01-10 06:18:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 103 states have (on average 1.4563106796116505) internal successors, (150), 105 states have internal predecessors, (150), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-10 06:18:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 179 transitions. [2022-01-10 06:18:59,029 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 179 transitions. Word has length 76 [2022-01-10 06:18:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:59,029 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 179 transitions. [2022-01-10 06:18:59,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:18:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 179 transitions. [2022-01-10 06:18:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:18:59,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:59,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:18:59,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:18:59,239 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 06:18:59,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -906311802, now seen corresponding path program 1 times [2022-01-10 06:18:59,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:59,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686795857] [2022-01-10 06:18:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:18:59,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:59,243 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 06:18:59,245 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 06:18:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:18:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:18:59,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:18:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:18:59,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:18:59,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:18:59,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686795857] [2022-01-10 06:18:59,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686795857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:18:59,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:18:59,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:18:59,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515083317] [2022-01-10 06:18:59,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:18:59,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:18:59,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:18:59,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:18:59,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:18:59,543 INFO L87 Difference]: Start difference. First operand 126 states and 179 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:18:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:18:59,600 INFO L93 Difference]: Finished difference Result 233 states and 333 transitions. [2022-01-10 06:18:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:18:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-01-10 06:18:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:18:59,602 INFO L225 Difference]: With dead ends: 233 [2022-01-10 06:18:59,602 INFO L226 Difference]: Without dead ends: 126 [2022-01-10 06:18:59,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 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 06:18:59,604 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 72 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 593 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 06:18:59,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 593 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:18:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-10 06:18:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-01-10 06:18:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 103 states have (on average 1.4563106796116505) internal successors, (150), 105 states have internal predecessors, (150), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-10 06:18:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 178 transitions. [2022-01-10 06:18:59,613 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 178 transitions. Word has length 77 [2022-01-10 06:18:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:18:59,613 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 178 transitions. [2022-01-10 06:18:59,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:18:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 178 transitions. [2022-01-10 06:18:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:18:59,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:18:59,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:18:59,625 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 06:18:59,815 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 06:18:59,815 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:18:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:18:59,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1562095557, now seen corresponding path program 2 times [2022-01-10 06:18:59,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:18:59,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41426971] [2022-01-10 06:18:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:18:59,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:18:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:18:59,818 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 06:18:59,819 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 06:18:59,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:18:59,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:18:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:18:59,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:00,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:00,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:00,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41426971] [2022-01-10 06:19:00,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41426971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:00,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:00,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:00,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942300347] [2022-01-10 06:19:00,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:00,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:00,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:00,062 INFO L87 Difference]: Start difference. First operand 126 states and 178 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:00,070 INFO L93 Difference]: Finished difference Result 204 states and 278 transitions. [2022-01-10 06:19:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2022-01-10 06:19:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:00,072 INFO L225 Difference]: With dead ends: 204 [2022-01-10 06:19:00,072 INFO L226 Difference]: Without dead ends: 129 [2022-01-10 06:19:00,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:00,073 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 1 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:00,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 346 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-10 06:19:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-01-10 06:19:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 107 states have internal predecessors, (152), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-10 06:19:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 180 transitions. [2022-01-10 06:19:00,081 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 180 transitions. Word has length 78 [2022-01-10 06:19:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:00,081 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 180 transitions. [2022-01-10 06:19:00,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 180 transitions. [2022-01-10 06:19:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:19:00,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:00,082 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:19:00,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:00,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:00,290 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:00,291 INFO L85 PathProgramCache]: Analyzing trace with hash -24130620, now seen corresponding path program 1 times [2022-01-10 06:19:00,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:00,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550955973] [2022-01-10 06:19:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:00,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:00,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:00,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:19:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:00,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:19:00,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:00,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550955973] [2022-01-10 06:19:00,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550955973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:00,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:00,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:00,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98284507] [2022-01-10 06:19:00,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:00,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:00,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:00,581 INFO L87 Difference]: Start difference. First operand 128 states and 180 transitions. Second operand has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:19:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:00,627 INFO L93 Difference]: Finished difference Result 239 states and 340 transitions. [2022-01-10 06:19:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:19:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2022-01-10 06:19:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:00,628 INFO L225 Difference]: With dead ends: 239 [2022-01-10 06:19:00,628 INFO L226 Difference]: Without dead ends: 130 [2022-01-10 06:19:00,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:00,629 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 70 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:00,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 595 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-10 06:19:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-01-10 06:19:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.4433962264150944) internal successors, (153), 109 states have internal predecessors, (153), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 183 transitions. [2022-01-10 06:19:00,636 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 183 transitions. Word has length 83 [2022-01-10 06:19:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:00,637 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 183 transitions. [2022-01-10 06:19:00,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:19:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 183 transitions. [2022-01-10 06:19:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:19:00,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:00,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:00,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:00,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:00,851 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash 524770110, now seen corresponding path program 1 times [2022-01-10 06:19:00,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:00,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579638502] [2022-01-10 06:19:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:00,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:00,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:00,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:00,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:19:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:19:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:01,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:19:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:01,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:01,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579638502] [2022-01-10 06:19:01,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579638502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:19:01,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:19:01,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:19:01,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300372699] [2022-01-10 06:19:01,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:19:01,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:19:01,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:19:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:19:01,394 INFO L87 Difference]: Start difference. First operand 130 states and 183 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 06:19:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:01,458 INFO L93 Difference]: Finished difference Result 319 states and 474 transitions. [2022-01-10 06:19:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:19:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-01-10 06:19:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:01,460 INFO L225 Difference]: With dead ends: 319 [2022-01-10 06:19:01,460 INFO L226 Difference]: Without dead ends: 244 [2022-01-10 06:19:01,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:19:01,461 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 284 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:01,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 646 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-10 06:19:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 220. [2022-01-10 06:19:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 196 states have (on average 1.6224489795918366) internal successors, (318), 199 states have internal predecessors, (318), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 348 transitions. [2022-01-10 06:19:01,487 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 348 transitions. Word has length 84 [2022-01-10 06:19:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:01,487 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 348 transitions. [2022-01-10 06:19:01,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 06:19:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 348 transitions. [2022-01-10 06:19:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 06:19:01,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:01,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:01,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:01,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:01,689 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1301394876, now seen corresponding path program 1 times [2022-01-10 06:19:01,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987922753] [2022-01-10 06:19:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:01,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:01,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:01,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:19:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:01,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:01,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:01,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987922753] [2022-01-10 06:19:01,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987922753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:01,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:01,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:01,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692085480] [2022-01-10 06:19:01,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:01,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:01,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:01,972 INFO L87 Difference]: Start difference. First operand 220 states and 348 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:01,991 INFO L93 Difference]: Finished difference Result 509 states and 831 transitions. [2022-01-10 06:19:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-01-10 06:19:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:01,992 INFO L225 Difference]: With dead ends: 509 [2022-01-10 06:19:01,992 INFO L226 Difference]: Without dead ends: 317 [2022-01-10 06:19:01,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:01,993 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 57 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:01,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 348 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-10 06:19:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 309. [2022-01-10 06:19:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 285 states have (on average 1.6701754385964913) internal successors, (476), 288 states have internal predecessors, (476), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 506 transitions. [2022-01-10 06:19:02,007 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 506 transitions. Word has length 91 [2022-01-10 06:19:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:02,007 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 506 transitions. [2022-01-10 06:19:02,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 506 transitions. [2022-01-10 06:19:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:19:02,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:02,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:02,027 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 06:19:02,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:02,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1463575206, now seen corresponding path program 1 times [2022-01-10 06:19:02,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:02,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520227243] [2022-01-10 06:19:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:02,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:02,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:02,232 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:02,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:19:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:02,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:02,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:02,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520227243] [2022-01-10 06:19:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520227243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:02,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:02,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:02,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716304822] [2022-01-10 06:19:02,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:02,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:02,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:02,486 INFO L87 Difference]: Start difference. First operand 309 states and 506 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:02,507 INFO L93 Difference]: Finished difference Result 737 states and 1237 transitions. [2022-01-10 06:19:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:02,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2022-01-10 06:19:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:02,510 INFO L225 Difference]: With dead ends: 737 [2022-01-10 06:19:02,510 INFO L226 Difference]: Without dead ends: 464 [2022-01-10 06:19:02,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:02,511 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 55 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:02,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-10 06:19:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 456. [2022-01-10 06:19:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 432 states have (on average 1.6967592592592593) internal successors, (733), 435 states have internal predecessors, (733), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 763 transitions. [2022-01-10 06:19:02,528 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 763 transitions. Word has length 92 [2022-01-10 06:19:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:02,528 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 763 transitions. [2022-01-10 06:19:02,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 763 transitions. [2022-01-10 06:19:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 06:19:02,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:02,530 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:02,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 06:19:02,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:02,739 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1317896282, now seen corresponding path program 1 times [2022-01-10 06:19:02,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:02,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600947741] [2022-01-10 06:19:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:02,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:02,756 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:02,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:19:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:03,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:03,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600947741] [2022-01-10 06:19:03,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600947741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:03,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:03,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:03,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154255866] [2022-01-10 06:19:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:03,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:03,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:03,013 INFO L87 Difference]: Start difference. First operand 456 states and 763 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:03,033 INFO L93 Difference]: Finished difference Result 1099 states and 1872 transitions. [2022-01-10 06:19:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2022-01-10 06:19:03,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:03,036 INFO L225 Difference]: With dead ends: 1099 [2022-01-10 06:19:03,036 INFO L226 Difference]: Without dead ends: 698 [2022-01-10 06:19:03,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:03,037 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 53 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:03,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-10 06:19:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 690. [2022-01-10 06:19:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 666 states have (on average 1.7042042042042043) internal successors, (1135), 669 states have internal predecessors, (1135), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1165 transitions. [2022-01-10 06:19:03,056 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1165 transitions. Word has length 93 [2022-01-10 06:19:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:03,056 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1165 transitions. [2022-01-10 06:19:03,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1165 transitions. [2022-01-10 06:19:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 06:19:03,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:03,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:03,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:03,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:03,267 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1068484616, now seen corresponding path program 1 times [2022-01-10 06:19:03,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393102150] [2022-01-10 06:19:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:03,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:03,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:03,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:03,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:19:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:03,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:03,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:03,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:03,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393102150] [2022-01-10 06:19:03,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393102150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:03,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:03,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:03,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979942985] [2022-01-10 06:19:03,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:03,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:03,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:03,555 INFO L87 Difference]: Start difference. First operand 690 states and 1165 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:03,582 INFO L93 Difference]: Finished difference Result 1671 states and 2862 transitions. [2022-01-10 06:19:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:03,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2022-01-10 06:19:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:03,586 INFO L225 Difference]: With dead ends: 1671 [2022-01-10 06:19:03,586 INFO L226 Difference]: Without dead ends: 1074 [2022-01-10 06:19:03,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:03,587 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 51 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:03,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-01-10 06:19:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1066. [2022-01-10 06:19:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1042 states have (on average 1.7005758157389634) internal successors, (1772), 1045 states have internal predecessors, (1772), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1802 transitions. [2022-01-10 06:19:03,617 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1802 transitions. Word has length 94 [2022-01-10 06:19:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:03,617 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1802 transitions. [2022-01-10 06:19:03,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1802 transitions. [2022-01-10 06:19:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-10 06:19:03,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:03,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:03,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:03,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:03,828 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1648648952, now seen corresponding path program 1 times [2022-01-10 06:19:03,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:03,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275974471] [2022-01-10 06:19:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:03,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:03,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:03,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:03,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:19:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:04,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:04,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275974471] [2022-01-10 06:19:04,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275974471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:04,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:04,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:04,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000349513] [2022-01-10 06:19:04,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:04,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:04,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:04,126 INFO L87 Difference]: Start difference. First operand 1066 states and 1802 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:04,165 INFO L93 Difference]: Finished difference Result 2606 states and 4463 transitions. [2022-01-10 06:19:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2022-01-10 06:19:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:04,170 INFO L225 Difference]: With dead ends: 2606 [2022-01-10 06:19:04,170 INFO L226 Difference]: Without dead ends: 1698 [2022-01-10 06:19:04,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:04,171 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 49 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:04,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-01-10 06:19:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1690. [2022-01-10 06:19:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1666 states have (on average 1.6920768307322929) internal successors, (2819), 1669 states have internal predecessors, (2819), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2849 transitions. [2022-01-10 06:19:04,213 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2849 transitions. Word has length 95 [2022-01-10 06:19:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:04,213 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2849 transitions. [2022-01-10 06:19:04,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2849 transitions. [2022-01-10 06:19:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:19:04,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:04,216 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:04,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:04,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:04,424 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash -48945814, now seen corresponding path program 1 times [2022-01-10 06:19:04,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:04,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253904634] [2022-01-10 06:19:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:04,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:04,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:04,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:04,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:19:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:04,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:04,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:04,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253904634] [2022-01-10 06:19:04,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253904634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:04,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:04,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:04,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881350400] [2022-01-10 06:19:04,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:04,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:04,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:04,704 INFO L87 Difference]: Start difference. First operand 1690 states and 2849 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:04,772 INFO L93 Difference]: Finished difference Result 3933 states and 6742 transitions. [2022-01-10 06:19:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:04,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2022-01-10 06:19:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:04,779 INFO L225 Difference]: With dead ends: 3933 [2022-01-10 06:19:04,779 INFO L226 Difference]: Without dead ends: 2581 [2022-01-10 06:19:04,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:04,783 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 47 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:04,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 339 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2022-01-10 06:19:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2573. [2022-01-10 06:19:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2549 states have (on average 1.6881129854845038) internal successors, (4303), 2552 states have internal predecessors, (4303), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4333 transitions. [2022-01-10 06:19:04,869 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4333 transitions. Word has length 96 [2022-01-10 06:19:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:04,870 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4333 transitions. [2022-01-10 06:19:04,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4333 transitions. [2022-01-10 06:19:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:19:04,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:04,873 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:04,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:05,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:19:05,082 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1971076502, now seen corresponding path program 1 times [2022-01-10 06:19:05,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:05,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748422564] [2022-01-10 06:19:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:05,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:05,092 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:19:05,093 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 06:19:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:05,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:05,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:05,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:05,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:05,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748422564] [2022-01-10 06:19:05,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748422564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:05,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:05,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:05,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700267100] [2022-01-10 06:19:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:05,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:05,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:05,357 INFO L87 Difference]: Start difference. First operand 2573 states and 4333 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:05,451 INFO L93 Difference]: Finished difference Result 6442 states and 10994 transitions. [2022-01-10 06:19:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 97 [2022-01-10 06:19:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:05,464 INFO L225 Difference]: With dead ends: 6442 [2022-01-10 06:19:05,464 INFO L226 Difference]: Without dead ends: 4350 [2022-01-10 06:19:05,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:05,467 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 45 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:05,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4350 states. [2022-01-10 06:19:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4350 to 4342. [2022-01-10 06:19:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4318 states have (on average 1.6764705882352942) internal successors, (7239), 4321 states have internal predecessors, (7239), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 7269 transitions. [2022-01-10 06:19:05,601 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 7269 transitions. Word has length 97 [2022-01-10 06:19:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:05,601 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 7269 transitions. [2022-01-10 06:19:05,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:05,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 7269 transitions. [2022-01-10 06:19:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:19:05,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:05,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:05,619 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 06:19:05,819 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 06:19:05,819 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash -18541512, now seen corresponding path program 1 times [2022-01-10 06:19:05,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:05,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029817145] [2022-01-10 06:19:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:05,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:05,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:05,821 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 06:19:05,822 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 06:19:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:05,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:06,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:06,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:06,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029817145] [2022-01-10 06:19:06,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029817145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:06,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:06,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:06,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254819384] [2022-01-10 06:19:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:06,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:06,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:06,105 INFO L87 Difference]: Start difference. First operand 4342 states and 7269 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:06,256 INFO L93 Difference]: Finished difference Result 11238 states and 19022 transitions. [2022-01-10 06:19:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 98 [2022-01-10 06:19:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:06,284 INFO L225 Difference]: With dead ends: 11238 [2022-01-10 06:19:06,284 INFO L226 Difference]: Without dead ends: 7601 [2022-01-10 06:19:06,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:06,294 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 43 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:06,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2022-01-10 06:19:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 7593. [2022-01-10 06:19:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7569 states have (on average 1.6628352490421456) internal successors, (12586), 7572 states have internal predecessors, (12586), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:19:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 12616 transitions. [2022-01-10 06:19:06,529 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 12616 transitions. Word has length 98 [2022-01-10 06:19:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:06,530 INFO L470 AbstractCegarLoop]: Abstraction has 7593 states and 12616 transitions. [2022-01-10 06:19:06,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 12616 transitions. [2022-01-10 06:19:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:19:06,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:06,541 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 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] [2022-01-10 06:19:06,565 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 06:19:06,750 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 06:19:06,750 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1347268801, now seen corresponding path program 2 times [2022-01-10 06:19:06,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:06,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562291337] [2022-01-10 06:19:06,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:19:06,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:06,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:06,752 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 06:19:06,754 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 06:19:06,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:19:06,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:19:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 06:19:07,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:07,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562291337] [2022-01-10 06:19:07,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562291337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:07,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:07,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:19:07,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281127080] [2022-01-10 06:19:07,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:07,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:07,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:07,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:07,051 INFO L87 Difference]: Start difference. First operand 7593 states and 12616 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:07,401 INFO L93 Difference]: Finished difference Result 14318 states and 23858 transitions. [2022-01-10 06:19:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:19:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 99 [2022-01-10 06:19:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:07,430 INFO L225 Difference]: With dead ends: 14318 [2022-01-10 06:19:07,430 INFO L226 Difference]: Without dead ends: 14251 [2022-01-10 06:19:07,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:19:07,434 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 144 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:07,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 710 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14251 states. [2022-01-10 06:19:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14251 to 14233. [2022-01-10 06:19:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14233 states, 14192 states have (on average 1.6699549041713642) internal successors, (23700), 14196 states have internal predecessors, (23700), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-10 06:19:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14233 states to 14233 states and 23751 transitions. [2022-01-10 06:19:07,843 INFO L78 Accepts]: Start accepts. Automaton has 14233 states and 23751 transitions. Word has length 99 [2022-01-10 06:19:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:07,843 INFO L470 AbstractCegarLoop]: Abstraction has 14233 states and 23751 transitions. [2022-01-10 06:19:07,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 14233 states and 23751 transitions. [2022-01-10 06:19:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 06:19:07,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:07,860 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 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] [2022-01-10 06:19:07,871 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 06:19:08,067 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 06:19:08,069 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash 614949602, now seen corresponding path program 1 times [2022-01-10 06:19:08,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:08,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042535339] [2022-01-10 06:19:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:08,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:08,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:08,071 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 06:19:08,072 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 06:19:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:19:08,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:08,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042535339] [2022-01-10 06:19:08,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042535339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:08,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:08,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:08,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981464681] [2022-01-10 06:19:08,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:08,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:08,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:08,366 INFO L87 Difference]: Start difference. First operand 14233 states and 23751 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:08,772 INFO L93 Difference]: Finished difference Result 26868 states and 45072 transitions. [2022-01-10 06:19:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2022-01-10 06:19:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:08,814 INFO L225 Difference]: With dead ends: 26868 [2022-01-10 06:19:08,814 INFO L226 Difference]: Without dead ends: 14249 [2022-01-10 06:19:08,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:08,843 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 56 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:08,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 409 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14249 states. [2022-01-10 06:19:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14249 to 14233. [2022-01-10 06:19:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14233 states, 14192 states have (on average 1.6512119503945886) internal successors, (23434), 14196 states have internal predecessors, (23434), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-10 06:19:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14233 states to 14233 states and 23485 transitions. [2022-01-10 06:19:09,263 INFO L78 Accepts]: Start accepts. Automaton has 14233 states and 23485 transitions. Word has length 100 [2022-01-10 06:19:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 14233 states and 23485 transitions. [2022-01-10 06:19:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14233 states and 23485 transitions. [2022-01-10 06:19:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 06:19:09,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:09,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:09,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:09,491 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 06:19:09,491 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:09,491 INFO L85 PathProgramCache]: Analyzing trace with hash -130509745, now seen corresponding path program 1 times [2022-01-10 06:19:09,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:09,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919607259] [2022-01-10 06:19:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:09,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:09,493 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 06:19:09,494 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 06:19:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:09,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:09,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:09,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919607259] [2022-01-10 06:19:09,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919607259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:09,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:09,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:09,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755102312] [2022-01-10 06:19:09,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:09,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:09,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:09,755 INFO L87 Difference]: Start difference. First operand 14233 states and 23485 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:10,488 INFO L93 Difference]: Finished difference Result 39079 states and 64842 transitions. [2022-01-10 06:19:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:10,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2022-01-10 06:19:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:10,549 INFO L225 Difference]: With dead ends: 39079 [2022-01-10 06:19:10,549 INFO L226 Difference]: Without dead ends: 26220 [2022-01-10 06:19:10,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:10,579 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 41 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:10,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2022-01-10 06:19:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 26204. [2022-01-10 06:19:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26204 states, 26163 states have (on average 1.6318082788671024) internal successors, (42693), 26167 states have internal predecessors, (42693), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-10 06:19:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26204 states to 26204 states and 42744 transitions. [2022-01-10 06:19:11,452 INFO L78 Accepts]: Start accepts. Automaton has 26204 states and 42744 transitions. Word has length 100 [2022-01-10 06:19:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 26204 states and 42744 transitions. [2022-01-10 06:19:11,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26204 states and 42744 transitions. [2022-01-10 06:19:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 06:19:11,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:11,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:11,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:19:11,691 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 06:19:11,691 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1976288599, now seen corresponding path program 1 times [2022-01-10 06:19:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632375316] [2022-01-10 06:19:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:11,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:11,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:11,707 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 06:19:11,775 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 06:19:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:12,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:12,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:12,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632375316] [2022-01-10 06:19:12,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632375316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:12,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:12,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:12,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22033499] [2022-01-10 06:19:12,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:12,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:12,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:12,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:12,046 INFO L87 Difference]: Start difference. First operand 26204 states and 42744 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:13,486 INFO L93 Difference]: Finished difference Result 73599 states and 120397 transitions. [2022-01-10 06:19:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 101 [2022-01-10 06:19:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:13,638 INFO L225 Difference]: With dead ends: 73599 [2022-01-10 06:19:13,638 INFO L226 Difference]: Without dead ends: 49251 [2022-01-10 06:19:13,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:13,688 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 39 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:13,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49251 states. [2022-01-10 06:19:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49251 to 49235. [2022-01-10 06:19:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49235 states, 49194 states have (on average 1.6088750660649673) internal successors, (79147), 49198 states have internal predecessors, (79147), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-10 06:19:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49235 states to 49235 states and 79198 transitions. [2022-01-10 06:19:15,486 INFO L78 Accepts]: Start accepts. Automaton has 49235 states and 79198 transitions. Word has length 101 [2022-01-10 06:19:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:15,486 INFO L470 AbstractCegarLoop]: Abstraction has 49235 states and 79198 transitions. [2022-01-10 06:19:15,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 49235 states and 79198 transitions. [2022-01-10 06:19:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 06:19:15,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:15,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:15,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:19:15,730 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 06:19:15,731 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1536843761, now seen corresponding path program 1 times [2022-01-10 06:19:15,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:15,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388605529] [2022-01-10 06:19:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:15,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:15,732 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 06:19:15,763 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 06:19:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:19:16,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:16,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:16,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388605529] [2022-01-10 06:19:16,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388605529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:16,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:16,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:16,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063920593] [2022-01-10 06:19:16,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:16,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:16,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:16,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:16,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:16,055 INFO L87 Difference]: Start difference. First operand 49235 states and 79198 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:18,439 INFO L93 Difference]: Finished difference Result 93566 states and 150201 transitions. [2022-01-10 06:19:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 102 [2022-01-10 06:19:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:18,652 INFO L225 Difference]: With dead ends: 93566 [2022-01-10 06:19:18,652 INFO L226 Difference]: Without dead ends: 93414 [2022-01-10 06:19:18,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:18,686 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 37 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:18,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 347 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93414 states. [2022-01-10 06:19:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93414 to 93398. [2022-01-10 06:19:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93398 states, 93357 states have (on average 1.5831592703278812) internal successors, (147799), 93361 states have internal predecessors, (147799), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-10 06:19:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93398 states to 93398 states and 147850 transitions. [2022-01-10 06:19:22,234 INFO L78 Accepts]: Start accepts. Automaton has 93398 states and 147850 transitions. Word has length 102 [2022-01-10 06:19:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:22,235 INFO L470 AbstractCegarLoop]: Abstraction has 93398 states and 147850 transitions. [2022-01-10 06:19:22,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 93398 states and 147850 transitions. [2022-01-10 06:19:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:19:22,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:22,262 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 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] [2022-01-10 06:19:22,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:19:22,470 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 06:19:22,471 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash 43121371, now seen corresponding path program 1 times [2022-01-10 06:19:22,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:22,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197367485] [2022-01-10 06:19:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:22,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:22,473 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 06:19:22,474 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 06:19:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:19:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 06:19:22,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:22,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:22,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197367485] [2022-01-10 06:19:22,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197367485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:22,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:22,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:19:22,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325550882] [2022-01-10 06:19:22,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:22,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:19:22,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:19:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:22,756 INFO L87 Difference]: Start difference. First operand 93398 states and 147850 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:25,979 INFO L93 Difference]: Finished difference Result 183846 states and 291596 transitions. [2022-01-10 06:19:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:19:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2022-01-10 06:19:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:26,242 INFO L225 Difference]: With dead ends: 183846 [2022-01-10 06:19:26,242 INFO L226 Difference]: Without dead ends: 93380 [2022-01-10 06:19:26,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:19:26,340 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 55 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:26,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 409 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93380 states. [2022-01-10 06:19:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93380 to 93364. [2022-01-10 06:19:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93364 states, 93323 states have (on average 1.5613621508095539) internal successors, (145711), 93327 states have internal predecessors, (145711), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-10 06:19:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93364 states to 93364 states and 145762 transitions. [2022-01-10 06:19:29,979 INFO L78 Accepts]: Start accepts. Automaton has 93364 states and 145762 transitions. Word has length 103 [2022-01-10 06:19:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:29,980 INFO L470 AbstractCegarLoop]: Abstraction has 93364 states and 145762 transitions. [2022-01-10 06:19:29,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 93364 states and 145762 transitions. [2022-01-10 06:19:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:19:30,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:30,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:30,081 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 06:19:30,268 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 06:19:30,269 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1759949049, now seen corresponding path program 1 times [2022-01-10 06:19:30,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593958213] [2022-01-10 06:19:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:30,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:30,304 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 06:19:30,306 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 06:19:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:19:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:19:30,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:30,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:30,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593958213] [2022-01-10 06:19:30,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593958213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:30,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:30,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:19:30,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135612328] [2022-01-10 06:19:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:30,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:30,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:30,717 INFO L87 Difference]: Start difference. First operand 93364 states and 145762 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:35,468 INFO L93 Difference]: Finished difference Result 184001 states and 287646 transitions. [2022-01-10 06:19:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:19:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2022-01-10 06:19:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:35,982 INFO L225 Difference]: With dead ends: 184001 [2022-01-10 06:19:35,982 INFO L226 Difference]: Without dead ends: 183865 [2022-01-10 06:19:36,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:19:36,041 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 115 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:36,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 709 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:19:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183865 states. [2022-01-10 06:19:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183865 to 183823. [2022-01-10 06:19:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183823 states, 183748 states have (on average 1.563744911509241) internal successors, (287335), 183754 states have internal predecessors, (287335), 47 states have call successors, (47), 25 states have call predecessors, (47), 27 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2022-01-10 06:19:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183823 states to 183823 states and 287428 transitions. [2022-01-10 06:19:43,289 INFO L78 Accepts]: Start accepts. Automaton has 183823 states and 287428 transitions. Word has length 103 [2022-01-10 06:19:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:43,289 INFO L470 AbstractCegarLoop]: Abstraction has 183823 states and 287428 transitions. [2022-01-10 06:19:43,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:19:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 183823 states and 287428 transitions. [2022-01-10 06:19:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:19:43,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:43,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:43,364 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 06:19:43,564 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 06:19:43,564 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 522773175, now seen corresponding path program 1 times [2022-01-10 06:19:43,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:43,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837467879] [2022-01-10 06:19:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:43,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:43,566 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 06:19:43,569 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 06:19:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:19:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:19:43,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:43,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:43,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837467879] [2022-01-10 06:19:43,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837467879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:43,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:43,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-10 06:19:43,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718588600] [2022-01-10 06:19:43,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:43,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:19:43,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:43,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:19:43,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:19:43,992 INFO L87 Difference]: Start difference. First operand 183823 states and 287428 transitions. Second operand has 12 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 06:19:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:19:50,033 INFO L93 Difference]: Finished difference Result 184659 states and 288530 transitions. [2022-01-10 06:19:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:19:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 104 [2022-01-10 06:19:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:19:50,701 INFO L225 Difference]: With dead ends: 184659 [2022-01-10 06:19:50,701 INFO L226 Difference]: Without dead ends: 184387 [2022-01-10 06:19:50,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:19:50,755 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 416 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:19:50,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 2030 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:19:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184387 states. [2022-01-10 06:19:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184387 to 184205. [2022-01-10 06:19:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184205 states, 184054 states have (on average 1.5632749084507807) internal successors, (287727), 184067 states have internal predecessors, (287727), 87 states have call successors, (87), 46 states have call predecessors, (87), 63 states have return successors, (114), 91 states have call predecessors, (114), 79 states have call successors, (114) [2022-01-10 06:19:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184205 states to 184205 states and 287928 transitions. [2022-01-10 06:19:58,089 INFO L78 Accepts]: Start accepts. Automaton has 184205 states and 287928 transitions. Word has length 104 [2022-01-10 06:19:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:19:58,089 INFO L470 AbstractCegarLoop]: Abstraction has 184205 states and 287928 transitions. [2022-01-10 06:19:58,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.363636363636363) internal successors, (81), 10 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 06:19:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 184205 states and 287928 transitions. [2022-01-10 06:19:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 06:19:58,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:19:58,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:19:58,169 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 06:19:58,368 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 06:19:58,369 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:19:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:19:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1091037177, now seen corresponding path program 1 times [2022-01-10 06:19:58,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:19:58,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657106207] [2022-01-10 06:19:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:19:58,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:19:58,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:19:58,371 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 06:19:58,373 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 06:19:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:19:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:19:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:19:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:19:58,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:19:58,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:19:58,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657106207] [2022-01-10 06:19:58,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657106207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:19:58,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:19:58,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:19:58,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132303331] [2022-01-10 06:19:58,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:19:58,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:19:58,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:19:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:19:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:19:58,657 INFO L87 Difference]: Start difference. First operand 184205 states and 287928 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:20:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:20:03,765 INFO L93 Difference]: Finished difference Result 184495 states and 288291 transitions. [2022-01-10 06:20:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:20:03,766 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 105 [2022-01-10 06:20:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:20:04,340 INFO L225 Difference]: With dead ends: 184495 [2022-01-10 06:20:04,340 INFO L226 Difference]: Without dead ends: 184173 [2022-01-10 06:20:04,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 06:20:04,399 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 9 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:20:04,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 666 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:20:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184173 states.