./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/email_spec7_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/product-lines/email_spec7_product19.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a4e3d1ef75cde0243f57ce4bcedb5827704adb835017a69deaa6c50c3201720 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:39:58,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:39:58,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:39:58,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:39:58,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:39:58,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:39:58,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:39:58,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:39:58,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:39:58,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:39:58,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:39:58,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:39:58,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:39:58,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:39:58,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:39:58,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:39:58,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:39:58,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:39:58,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:39:58,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:39:58,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:39:58,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:39:58,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:39:58,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:39:58,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:39:58,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:39:58,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:39:58,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:39:58,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:39:58,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:39:58,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:39:58,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:39:58,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:39:58,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:39:58,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:39:58,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:39:58,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:39:58,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:39:58,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:39:58,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:39:58,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:39:58,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:39:58,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:39:58,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:39:58,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:39:58,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:39:58,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:39:58,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:39:58,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:39:58,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:39:58,691 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:39:58,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:39:58,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:39:58,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:39:58,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:39:58,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:39:58,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:39:58,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:39:58,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:39:58,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:39:58,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:39:58,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:39:58,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:39:58,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:39:58,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:39:58,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:39:58,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:39:58,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:39:58,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:39:58,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:39:58,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:39:58,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:39:58,696 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:39:58,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:39:58,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:39:58,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:39:58,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a4e3d1ef75cde0243f57ce4bcedb5827704adb835017a69deaa6c50c3201720 [2021-12-14 14:39:58,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:39:58,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:39:58,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:39:58,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:39:58,943 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:39:58,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec7_product19.cil.c [2021-12-14 14:39:59,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5208b59/fa01c3b6cd174f7fb4648e40e595786a/FLAG9bcd29eab [2021-12-14 14:39:59,453 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:39:59,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec7_product19.cil.c [2021-12-14 14:39:59,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5208b59/fa01c3b6cd174f7fb4648e40e595786a/FLAG9bcd29eab [2021-12-14 14:39:59,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5208b59/fa01c3b6cd174f7fb4648e40e595786a [2021-12-14 14:39:59,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:39:59,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:39:59,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:39:59,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:39:59,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:39:59,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:39:59,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75aa4f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59, skipping insertion in model container [2021-12-14 14:39:59,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:39:59,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:39:59,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:39:59,824 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec7_product19.cil.c[37206,37219] [2021-12-14 14:39:59,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:39:59,865 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:39:59,911 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec7_product19.cil.c[37206,37219] [2021-12-14 14:39:59,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:39:59,948 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:39:59,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59 WrapperNode [2021-12-14 14:39:59,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:39:59,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:39:59,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:39:59,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:39:59,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:39:59,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,052 INFO L137 Inliner]: procedures = 127, calls = 196, calls flagged for inlining = 60, calls inlined = 55, statements flattened = 990 [2021-12-14 14:40:00,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:40:00,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:40:00,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:40:00,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:40:00,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:40:00,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:40:00,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:40:00,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:40:00,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (1/1) ... [2021-12-14 14:40:00,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:40:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:40:00,213 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) [2021-12-14 14:40:00,230 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 [2021-12-14 14:40:00,246 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-14 14:40:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-14 14:40:00,247 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-14 14:40:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-14 14:40:00,247 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-12-14 14:40:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-12-14 14:40:00,247 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-12-14 14:40:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-12-14 14:40:00,247 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-12-14 14:40:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-12-14 14:40:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-12-14 14:40:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-12-14 14:40:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-14 14:40:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-12-14 14:40:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-12-14 14:40:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-14 14:40:00,249 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-14 14:40:00,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:40:00,249 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-12-14 14:40:00,249 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-12-14 14:40:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-12-14 14:40:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-12-14 14:40:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-12-14 14:40:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-12-14 14:40:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-14 14:40:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-14 14:40:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-14 14:40:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-14 14:40:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-12-14 14:40:00,251 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-12-14 14:40:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-12-14 14:40:00,251 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-12-14 14:40:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:40:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-12-14 14:40:00,251 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-12-14 14:40:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:40:00,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:40:00,506 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:40:00,508 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:40:00,875 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:40:00,882 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:40:00,882 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 14:40:00,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:40:00 BoogieIcfgContainer [2021-12-14 14:40:00,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:40:00,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:40:00,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:40:00,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:40:00,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:39:59" (1/3) ... [2021-12-14 14:40:00,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a4b378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:40:00, skipping insertion in model container [2021-12-14 14:40:00,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:39:59" (2/3) ... [2021-12-14 14:40:00,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a4b378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:40:00, skipping insertion in model container [2021-12-14 14:40:00,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:40:00" (3/3) ... [2021-12-14 14:40:00,907 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product19.cil.c [2021-12-14 14:40:00,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:40:00,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:40:00,942 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:40:00,947 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 [2021-12-14 14:40:00,948 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:40:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 301 states, 241 states have (on average 1.5352697095435686) internal successors, (370), 243 states have internal predecessors, (370), 42 states have call successors, (42), 16 states have call predecessors, (42), 16 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-14 14:40:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 14:40:00,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:00,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:40:00,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 656283880, now seen corresponding path program 1 times [2021-12-14 14:40:00,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:00,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18595406] [2021-12-14 14:40:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:00,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:40:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:40:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:40:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:40:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 14:40:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 14:40:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 14:40:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 14:40:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 14:40:01,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:01,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18595406] [2021-12-14 14:40:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18595406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:40:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125238508] [2021-12-14 14:40:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:01,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:40:01,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:40:01,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:40:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:01,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-14 14:40:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:40:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 14:40:01,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:40:01,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125238508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:01,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:40:01,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2021-12-14 14:40:01,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291470218] [2021-12-14 14:40:01,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:01,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 14:40:01,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:01,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 14:40:01,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:40:01,829 INFO L87 Difference]: Start difference. First operand has 301 states, 241 states have (on average 1.5352697095435686) internal successors, (370), 243 states have internal predecessors, (370), 42 states have call successors, (42), 16 states have call predecessors, (42), 16 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:01,869 INFO L93 Difference]: Finished difference Result 448 states and 662 transitions. [2021-12-14 14:40:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 14:40:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 86 [2021-12-14 14:40:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:01,881 INFO L225 Difference]: With dead ends: 448 [2021-12-14 14:40:01,881 INFO L226 Difference]: Without dead ends: 294 [2021-12-14 14:40:01,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:40:01,888 INFO L933 BasicCegarLoop]: 450 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, 450 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 [2021-12-14 14:40:01,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:40:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-14 14:40:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2021-12-14 14:40:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 235 states have (on average 1.5276595744680852) internal successors, (359), 236 states have internal predecessors, (359), 42 states have call successors, (42), 16 states have call predecessors, (42), 16 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-14 14:40:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 442 transitions. [2021-12-14 14:40:01,949 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 442 transitions. Word has length 86 [2021-12-14 14:40:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:01,952 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 442 transitions. [2021-12-14 14:40:01,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 442 transitions. [2021-12-14 14:40:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 14:40:01,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:01,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:40:01,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 14:40:02,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-14 14:40:02,176 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1471014267, now seen corresponding path program 1 times [2021-12-14 14:40:02,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:02,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462054938] [2021-12-14 14:40:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:02,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:40:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:40:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:40:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 14:40:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:40:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:40:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 14:40:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 14:40:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 14:40:02,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462054938] [2021-12-14 14:40:02,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462054938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:40:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458320444] [2021-12-14 14:40:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:02,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:02,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:40:02,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:40:02,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:40:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:40:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:40:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 14:40:02,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:40:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458320444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:02,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:40:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-14 14:40:02,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752717333] [2021-12-14 14:40:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:02,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:40:02,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:40:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:40:02,715 INFO L87 Difference]: Start difference. First operand 294 states and 442 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:02,753 INFO L93 Difference]: Finished difference Result 438 states and 643 transitions. [2021-12-14 14:40:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:40:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-12-14 14:40:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:02,756 INFO L225 Difference]: With dead ends: 438 [2021-12-14 14:40:02,756 INFO L226 Difference]: Without dead ends: 297 [2021-12-14 14:40:02,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:40:02,759 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 1 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 878 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 [2021-12-14 14:40:02,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 878 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:40:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-14 14:40:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2021-12-14 14:40:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 237 states have (on average 1.5232067510548524) internal successors, (361), 238 states have internal predecessors, (361), 42 states have call successors, (42), 16 states have call predecessors, (42), 16 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-14 14:40:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 444 transitions. [2021-12-14 14:40:02,782 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 444 transitions. Word has length 87 [2021-12-14 14:40:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:02,783 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 444 transitions. [2021-12-14 14:40:02,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 444 transitions. [2021-12-14 14:40:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 14:40:02,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:02,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:40:02,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 14:40:02,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-14 14:40:02,989 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1546828526, now seen corresponding path program 1 times [2021-12-14 14:40:02,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088664965] [2021-12-14 14:40:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:02,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:40:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:40:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:40:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 14:40:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 14:40:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 14:40:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 14:40:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:40:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 14:40:03,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:03,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088664965] [2021-12-14 14:40:03,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088664965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:40:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965555014] [2021-12-14 14:40:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:03,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:40:03,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:40:03,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:40:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:40:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:40:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 14:40:03,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:40:03,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965555014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:03,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:40:03,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-14 14:40:03,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608282995] [2021-12-14 14:40:03,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:03,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:40:03,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:03,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:40:03,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:40:03,435 INFO L87 Difference]: Start difference. First operand 296 states and 444 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:03,453 INFO L93 Difference]: Finished difference Result 622 states and 947 transitions. [2021-12-14 14:40:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:40:03,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 93 [2021-12-14 14:40:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:03,456 INFO L225 Difference]: With dead ends: 622 [2021-12-14 14:40:03,456 INFO L226 Difference]: Without dead ends: 353 [2021-12-14 14:40:03,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:40:03,459 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 107 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 851 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 [2021-12-14 14:40:03,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 851 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:40:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-14 14:40:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-12-14 14:40:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 275 states have (on average 1.538181818181818) internal successors, (423), 276 states have internal predecessors, (423), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-14 14:40:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 528 transitions. [2021-12-14 14:40:03,478 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 528 transitions. Word has length 93 [2021-12-14 14:40:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:03,478 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 528 transitions. [2021-12-14 14:40:03,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 528 transitions. [2021-12-14 14:40:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 14:40:03,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:03,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:40:03,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 14:40:03,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:03,697 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash -519295329, now seen corresponding path program 1 times [2021-12-14 14:40:03,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:03,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803048489] [2021-12-14 14:40:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:03,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:40:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:40:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:40:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 14:40:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 14:40:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 14:40:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 14:40:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 14:40:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 14:40:03,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803048489] [2021-12-14 14:40:03,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803048489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:40:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035222969] [2021-12-14 14:40:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:03,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:40:03,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:40:03,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 14:40:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 14:40:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:40:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 14:40:04,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:40:04,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035222969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:04,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:40:04,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-14 14:40:04,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985715046] [2021-12-14 14:40:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:04,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:40:04,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:40:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:40:04,246 INFO L87 Difference]: Start difference. First operand 345 states and 528 transitions. Second operand has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:04,299 INFO L93 Difference]: Finished difference Result 681 states and 1046 transitions. [2021-12-14 14:40:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:40:04,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 94 [2021-12-14 14:40:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:04,304 INFO L225 Difference]: With dead ends: 681 [2021-12-14 14:40:04,304 INFO L226 Difference]: Without dead ends: 347 [2021-12-14 14:40:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:04,307 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 125 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1588 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 [2021-12-14 14:40:04,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1588 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:40:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-14 14:40:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2021-12-14 14:40:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 276 states have (on average 1.536231884057971) internal successors, (424), 278 states have internal predecessors, (424), 53 states have call successors, (53), 16 states have call predecessors, (53), 17 states have return successors, (54), 52 states have call predecessors, (54), 52 states have call successors, (54) [2021-12-14 14:40:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 531 transitions. [2021-12-14 14:40:04,339 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 531 transitions. Word has length 94 [2021-12-14 14:40:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:04,340 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 531 transitions. [2021-12-14 14:40:04,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 531 transitions. [2021-12-14 14:40:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-14 14:40:04,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:04,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-14 14:40:04,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 14:40:04,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:04,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash 600148154, now seen corresponding path program 1 times [2021-12-14 14:40:04,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:04,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405316575] [2021-12-14 14:40:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:04,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 14:40:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 14:40:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 14:40:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 14:40:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 14:40:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 14:40:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 14:40:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 14:40:04,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:04,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405316575] [2021-12-14 14:40:04,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405316575] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:40:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926872778] [2021-12-14 14:40:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:04,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:40:04,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:40:04,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 14:40:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:04,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 14:40:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:40:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 14:40:05,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:40:05,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926872778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:05,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:40:05,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2021-12-14 14:40:05,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272922642] [2021-12-14 14:40:05,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:05,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:40:05,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:40:05,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:40:05,048 INFO L87 Difference]: Start difference. First operand 347 states and 531 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:05,119 INFO L93 Difference]: Finished difference Result 683 states and 1051 transitions. [2021-12-14 14:40:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:40:05,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 95 [2021-12-14 14:40:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:05,122 INFO L225 Difference]: With dead ends: 683 [2021-12-14 14:40:05,122 INFO L226 Difference]: Without dead ends: 349 [2021-12-14 14:40:05,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:40:05,125 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 124 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:05,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1577 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:40:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-14 14:40:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-12-14 14:40:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 277 states have (on average 1.5342960288808665) internal successors, (425), 280 states have internal predecessors, (425), 53 states have call successors, (53), 16 states have call predecessors, (53), 18 states have return successors, (59), 52 states have call predecessors, (59), 52 states have call successors, (59) [2021-12-14 14:40:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 537 transitions. [2021-12-14 14:40:05,143 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 537 transitions. Word has length 95 [2021-12-14 14:40:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:05,143 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 537 transitions. [2021-12-14 14:40:05,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 537 transitions. [2021-12-14 14:40:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-14 14:40:05,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:05,145 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:05,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 14:40:05,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:05,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash -610725529, now seen corresponding path program 1 times [2021-12-14 14:40:05,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:05,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377318420] [2021-12-14 14:40:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:05,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:40:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 14:40:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 14:40:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 14:40:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 14:40:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 14:40:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 14:40:05,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377318420] [2021-12-14 14:40:05,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377318420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:05,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:05,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 14:40:05,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937778567] [2021-12-14 14:40:05,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:05,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 14:40:05,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 14:40:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:40:05,471 INFO L87 Difference]: Start difference. First operand 349 states and 537 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:06,702 INFO L93 Difference]: Finished difference Result 831 states and 1280 transitions. [2021-12-14 14:40:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 14:40:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 96 [2021-12-14 14:40:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:06,705 INFO L225 Difference]: With dead ends: 831 [2021-12-14 14:40:06,705 INFO L226 Difference]: Without dead ends: 505 [2021-12-14 14:40:06,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:40:06,707 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 1063 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 2067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:06,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 1579 Invalid, 2067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 14:40:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-14 14:40:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 349. [2021-12-14 14:40:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 277 states have (on average 1.5342960288808665) internal successors, (425), 280 states have internal predecessors, (425), 53 states have call successors, (53), 16 states have call predecessors, (53), 18 states have return successors, (58), 52 states have call predecessors, (58), 52 states have call successors, (58) [2021-12-14 14:40:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 536 transitions. [2021-12-14 14:40:06,723 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 536 transitions. Word has length 96 [2021-12-14 14:40:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:06,724 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 536 transitions. [2021-12-14 14:40:06,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 536 transitions. [2021-12-14 14:40:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-14 14:40:06,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:06,725 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:06,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:40:06,725 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1759702684, now seen corresponding path program 2 times [2021-12-14 14:40:06,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:06,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539253535] [2021-12-14 14:40:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:06,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 14:40:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 14:40:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 14:40:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 14:40:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:40:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 14:40:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 14:40:06,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539253535] [2021-12-14 14:40:06,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539253535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:06,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:06,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 14:40:06,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803816301] [2021-12-14 14:40:06,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:06,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 14:40:06,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:06,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 14:40:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:40:06,807 INFO L87 Difference]: Start difference. First operand 349 states and 536 transitions. Second operand has 9 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:07,920 INFO L93 Difference]: Finished difference Result 833 states and 1283 transitions. [2021-12-14 14:40:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 14:40:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 97 [2021-12-14 14:40:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:07,925 INFO L225 Difference]: With dead ends: 833 [2021-12-14 14:40:07,925 INFO L226 Difference]: Without dead ends: 507 [2021-12-14 14:40:07,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:40:07,927 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 1058 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:07,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 1580 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 14:40:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-14 14:40:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 351. [2021-12-14 14:40:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.5323741007194245) internal successors, (426), 282 states have internal predecessors, (426), 53 states have call successors, (53), 16 states have call predecessors, (53), 19 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2021-12-14 14:40:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 539 transitions. [2021-12-14 14:40:07,961 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 539 transitions. Word has length 97 [2021-12-14 14:40:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:07,962 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 539 transitions. [2021-12-14 14:40:07,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:40:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 539 transitions. [2021-12-14 14:40:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 14:40:07,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:07,963 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:07,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:40:07,963 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 827408162, now seen corresponding path program 1 times [2021-12-14 14:40:07,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:07,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721631921] [2021-12-14 14:40:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:07,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 14:40:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 14:40:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 14:40:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:40:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 14:40:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 14:40:08,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:08,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721631921] [2021-12-14 14:40:08,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721631921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:08,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:08,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 14:40:08,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453754568] [2021-12-14 14:40:08,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:08,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 14:40:08,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 14:40:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:40:08,063 INFO L87 Difference]: Start difference. First operand 351 states and 539 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 8 states have internal predecessors, (66), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 14:40:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:09,680 INFO L93 Difference]: Finished difference Result 831 states and 1278 transitions. [2021-12-14 14:40:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:40:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 8 states have internal predecessors, (66), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-12-14 14:40:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:09,683 INFO L225 Difference]: With dead ends: 831 [2021-12-14 14:40:09,683 INFO L226 Difference]: Without dead ends: 507 [2021-12-14 14:40:09,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-12-14 14:40:09,684 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 1163 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 3526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:09,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 2048 Invalid, 3526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 14:40:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-14 14:40:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 351. [2021-12-14 14:40:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.5323741007194245) internal successors, (426), 282 states have internal predecessors, (426), 53 states have call successors, (53), 16 states have call predecessors, (53), 19 states have return successors, (59), 52 states have call predecessors, (59), 52 states have call successors, (59) [2021-12-14 14:40:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 538 transitions. [2021-12-14 14:40:09,700 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 538 transitions. Word has length 98 [2021-12-14 14:40:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:09,701 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 538 transitions. [2021-12-14 14:40:09,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 8 states have internal predecessors, (66), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 14:40:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 538 transitions. [2021-12-14 14:40:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 14:40:09,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:09,702 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:09,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:40:09,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash -173000395, now seen corresponding path program 2 times [2021-12-14 14:40:09,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:09,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779849042] [2021-12-14 14:40:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:09,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 14:40:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 14:40:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 14:40:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:40:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 14:40:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 14:40:09,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:09,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779849042] [2021-12-14 14:40:09,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779849042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:09,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:09,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 14:40:09,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520177241] [2021-12-14 14:40:09,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:09,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 14:40:09,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 14:40:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:40:09,822 INFO L87 Difference]: Start difference. First operand 351 states and 538 transitions. Second operand has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 14:40:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:11,170 INFO L93 Difference]: Finished difference Result 833 states and 1284 transitions. [2021-12-14 14:40:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:40:11,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-12-14 14:40:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:11,174 INFO L225 Difference]: With dead ends: 833 [2021-12-14 14:40:11,174 INFO L226 Difference]: Without dead ends: 509 [2021-12-14 14:40:11,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-12-14 14:40:11,177 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 1163 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 3143 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 3541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 3143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:11,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 2038 Invalid, 3541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 3143 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 14:40:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-14 14:40:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 353. [2021-12-14 14:40:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 279 states have (on average 1.5304659498207884) internal successors, (427), 284 states have internal predecessors, (427), 53 states have call successors, (53), 16 states have call predecessors, (53), 20 states have return successors, (64), 52 states have call predecessors, (64), 52 states have call successors, (64) [2021-12-14 14:40:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 544 transitions. [2021-12-14 14:40:11,197 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 544 transitions. Word has length 99 [2021-12-14 14:40:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:11,198 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 544 transitions. [2021-12-14 14:40:11,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 14:40:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 544 transitions. [2021-12-14 14:40:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 14:40:11,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:11,200 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:11,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:40:11,201 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1019207715, now seen corresponding path program 1 times [2021-12-14 14:40:11,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:11,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639336105] [2021-12-14 14:40:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:11,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 14:40:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 14:40:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 14:40:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 14:40:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 14:40:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:11,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:11,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639336105] [2021-12-14 14:40:11,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639336105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:40:11,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128191346] [2021-12-14 14:40:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:11,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:11,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:40:11,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:40:11,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 14:40:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:40:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:40:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:11,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:40:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:11,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128191346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:40:11,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:40:11,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2021-12-14 14:40:11,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807890383] [2021-12-14 14:40:11,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:40:11,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 14:40:11,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 14:40:11,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:40:11,763 INFO L87 Difference]: Start difference. First operand 353 states and 544 transitions. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (27), 6 states have call predecessors, (27), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 14:40:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:12,987 INFO L93 Difference]: Finished difference Result 1002 states and 1612 transitions. [2021-12-14 14:40:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 14:40:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (27), 6 states have call predecessors, (27), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 100 [2021-12-14 14:40:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:12,991 INFO L225 Difference]: With dead ends: 1002 [2021-12-14 14:40:12,992 INFO L226 Difference]: Without dead ends: 861 [2021-12-14 14:40:12,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:40:12,994 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 1332 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:12,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 1937 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 14:40:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-12-14 14:40:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 681. [2021-12-14 14:40:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 543 states have (on average 1.5930018416206262) internal successors, (865), 548 states have internal predecessors, (865), 117 states have call successors, (117), 16 states have call predecessors, (117), 20 states have return successors, (138), 116 states have call predecessors, (138), 116 states have call successors, (138) [2021-12-14 14:40:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1120 transitions. [2021-12-14 14:40:13,039 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1120 transitions. Word has length 100 [2021-12-14 14:40:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:13,039 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1120 transitions. [2021-12-14 14:40:13,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (27), 6 states have call predecessors, (27), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 14:40:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1120 transitions. [2021-12-14 14:40:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 14:40:13,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:13,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-14 14:40:13,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 14:40:13,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:40:13,260 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash -123309536, now seen corresponding path program 1 times [2021-12-14 14:40:13,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:13,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329872925] [2021-12-14 14:40:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:13,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 14:40:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:40:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 14:40:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 14:40:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 14:40:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:13,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329872925] [2021-12-14 14:40:13,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329872925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:13,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:13,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:13,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51477890] [2021-12-14 14:40:13,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:13,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:13,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:13,339 INFO L87 Difference]: Start difference. First operand 681 states and 1120 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:14,324 INFO L93 Difference]: Finished difference Result 1783 states and 2983 transitions. [2021-12-14 14:40:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:14,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-12-14 14:40:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:14,330 INFO L225 Difference]: With dead ends: 1783 [2021-12-14 14:40:14,330 INFO L226 Difference]: Without dead ends: 1170 [2021-12-14 14:40:14,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:14,332 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 1046 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:14,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 1404 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:40:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-12-14 14:40:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1006. [2021-12-14 14:40:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 804 states have (on average 1.6044776119402986) internal successors, (1290), 809 states have internal predecessors, (1290), 181 states have call successors, (181), 16 states have call predecessors, (181), 20 states have return successors, (212), 180 states have call predecessors, (212), 180 states have call successors, (212) [2021-12-14 14:40:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1683 transitions. [2021-12-14 14:40:14,374 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1683 transitions. Word has length 106 [2021-12-14 14:40:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:14,374 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1683 transitions. [2021-12-14 14:40:14,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1683 transitions. [2021-12-14 14:40:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-14 14:40:14,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:14,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-14 14:40:14,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:40:14,378 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -939436204, now seen corresponding path program 1 times [2021-12-14 14:40:14,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:14,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394430206] [2021-12-14 14:40:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:14,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:40:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 14:40:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 14:40:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:40:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 14:40:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:14,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:14,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394430206] [2021-12-14 14:40:14,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394430206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:14,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:14,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:14,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151165092] [2021-12-14 14:40:14,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:14,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:14,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:14,452 INFO L87 Difference]: Start difference. First operand 1006 states and 1683 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:15,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:15,439 INFO L93 Difference]: Finished difference Result 2563 states and 4332 transitions. [2021-12-14 14:40:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-12-14 14:40:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:15,446 INFO L225 Difference]: With dead ends: 2563 [2021-12-14 14:40:15,446 INFO L226 Difference]: Without dead ends: 1678 [2021-12-14 14:40:15,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:15,450 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1044 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:15,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 1338 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:40:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-12-14 14:40:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1514. [2021-12-14 14:40:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1217 states have (on average 1.6113393590797043) internal successors, (1961), 1222 states have internal predecessors, (1961), 276 states have call successors, (276), 16 states have call predecessors, (276), 20 states have return successors, (307), 275 states have call predecessors, (307), 275 states have call successors, (307) [2021-12-14 14:40:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2544 transitions. [2021-12-14 14:40:15,513 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2544 transitions. Word has length 107 [2021-12-14 14:40:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:15,513 INFO L470 AbstractCegarLoop]: Abstraction has 1514 states and 2544 transitions. [2021-12-14 14:40:15,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2544 transitions. [2021-12-14 14:40:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-14 14:40:15,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:15,518 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-14 14:40:15,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 14:40:15,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1004305410, now seen corresponding path program 1 times [2021-12-14 14:40:15,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:15,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073093653] [2021-12-14 14:40:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:15,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 14:40:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 14:40:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 14:40:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:40:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 14:40:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:15,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:15,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073093653] [2021-12-14 14:40:15,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073093653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:15,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:15,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:15,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137898927] [2021-12-14 14:40:15,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:15,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:15,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:15,593 INFO L87 Difference]: Start difference. First operand 1514 states and 2544 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:16,633 INFO L93 Difference]: Finished difference Result 3715 states and 6341 transitions. [2021-12-14 14:40:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2021-12-14 14:40:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:16,644 INFO L225 Difference]: With dead ends: 3715 [2021-12-14 14:40:16,644 INFO L226 Difference]: Without dead ends: 2447 [2021-12-14 14:40:16,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:16,672 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1042 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:16,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1334 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:40:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-12-14 14:40:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2283. [2021-12-14 14:40:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 1863 states have (on average 1.6167471819645733) internal successors, (3012), 1868 states have internal predecessors, (3012), 399 states have call successors, (399), 16 states have call predecessors, (399), 20 states have return successors, (446), 398 states have call predecessors, (446), 398 states have call successors, (446) [2021-12-14 14:40:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3857 transitions. [2021-12-14 14:40:16,746 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3857 transitions. Word has length 108 [2021-12-14 14:40:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:16,747 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3857 transitions. [2021-12-14 14:40:16,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3857 transitions. [2021-12-14 14:40:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 14:40:16,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:16,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-14 14:40:16,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 14:40:16,754 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:16,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1214672019, now seen corresponding path program 1 times [2021-12-14 14:40:16,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:16,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848991514] [2021-12-14 14:40:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:16,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 14:40:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 14:40:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 14:40:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 14:40:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 14:40:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:16,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:16,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848991514] [2021-12-14 14:40:16,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848991514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:16,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:16,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:16,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103644693] [2021-12-14 14:40:16,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:16,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:16,833 INFO L87 Difference]: Start difference. First operand 2283 states and 3857 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:17,909 INFO L93 Difference]: Finished difference Result 5509 states and 9475 transitions. [2021-12-14 14:40:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-12-14 14:40:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:17,927 INFO L225 Difference]: With dead ends: 5509 [2021-12-14 14:40:17,927 INFO L226 Difference]: Without dead ends: 3676 [2021-12-14 14:40:17,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:17,935 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 1047 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:17,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 1326 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:40:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2021-12-14 14:40:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3512. [2021-12-14 14:40:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3512 states, 2913 states have (on average 1.619979402677652) internal successors, (4719), 2918 states have internal predecessors, (4719), 578 states have call successors, (578), 16 states have call predecessors, (578), 20 states have return successors, (651), 577 states have call predecessors, (651), 577 states have call successors, (651) [2021-12-14 14:40:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3512 states to 3512 states and 5948 transitions. [2021-12-14 14:40:18,105 INFO L78 Accepts]: Start accepts. Automaton has 3512 states and 5948 transitions. Word has length 109 [2021-12-14 14:40:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:18,105 INFO L470 AbstractCegarLoop]: Abstraction has 3512 states and 5948 transitions. [2021-12-14 14:40:18,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3512 states and 5948 transitions. [2021-12-14 14:40:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 14:40:18,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:18,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:18,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 14:40:18,112 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:18,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1692208126, now seen corresponding path program 1 times [2021-12-14 14:40:18,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:18,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011261657] [2021-12-14 14:40:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:18,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:40:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 14:40:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 14:40:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 14:40:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 14:40:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:18,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:18,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011261657] [2021-12-14 14:40:18,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011261657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:18,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:18,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:18,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449233348] [2021-12-14 14:40:18,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:18,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:18,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:18,195 INFO L87 Difference]: Start difference. First operand 3512 states and 5948 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:19,209 INFO L93 Difference]: Finished difference Result 8457 states and 14622 transitions. [2021-12-14 14:40:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:19,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2021-12-14 14:40:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:19,236 INFO L225 Difference]: With dead ends: 8457 [2021-12-14 14:40:19,236 INFO L226 Difference]: Without dead ends: 5707 [2021-12-14 14:40:19,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:19,248 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1045 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:19,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 1364 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:40:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2021-12-14 14:40:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5543. [2021-12-14 14:40:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5543 states, 4568 states have (on average 1.6136164623467601) internal successors, (7371), 4573 states have internal predecessors, (7371), 954 states have call successors, (954), 16 states have call predecessors, (954), 20 states have return successors, (1071), 953 states have call predecessors, (1071), 953 states have call successors, (1071) [2021-12-14 14:40:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5543 states to 5543 states and 9396 transitions. [2021-12-14 14:40:19,504 INFO L78 Accepts]: Start accepts. Automaton has 5543 states and 9396 transitions. Word has length 110 [2021-12-14 14:40:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:19,504 INFO L470 AbstractCegarLoop]: Abstraction has 5543 states and 9396 transitions. [2021-12-14 14:40:19,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5543 states and 9396 transitions. [2021-12-14 14:40:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 14:40:19,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:19,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:19,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 14:40:19,514 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:19,514 INFO L85 PathProgramCache]: Analyzing trace with hash 648134799, now seen corresponding path program 1 times [2021-12-14 14:40:19,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:19,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178046906] [2021-12-14 14:40:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:19,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:40:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 14:40:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 14:40:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 14:40:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:40:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:19,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178046906] [2021-12-14 14:40:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178046906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:19,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:19,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:19,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673198000] [2021-12-14 14:40:19,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:19,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:19,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:19,649 INFO L87 Difference]: Start difference. First operand 5543 states and 9396 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:20,834 INFO L93 Difference]: Finished difference Result 13794 states and 23843 transitions. [2021-12-14 14:40:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-12-14 14:40:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:20,874 INFO L225 Difference]: With dead ends: 13794 [2021-12-14 14:40:20,875 INFO L226 Difference]: Without dead ends: 9390 [2021-12-14 14:40:20,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:20,889 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 1043 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:20,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 1327 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:40:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9390 states. [2021-12-14 14:40:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9390 to 9226. [2021-12-14 14:40:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9226 states, 7645 states have (on average 1.6111183780248528) internal successors, (12317), 7650 states have internal predecessors, (12317), 1560 states have call successors, (1560), 16 states have call predecessors, (1560), 20 states have return successors, (1755), 1559 states have call predecessors, (1755), 1559 states have call successors, (1755) [2021-12-14 14:40:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9226 states to 9226 states and 15632 transitions. [2021-12-14 14:40:21,408 INFO L78 Accepts]: Start accepts. Automaton has 9226 states and 15632 transitions. Word has length 111 [2021-12-14 14:40:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:21,409 INFO L470 AbstractCegarLoop]: Abstraction has 9226 states and 15632 transitions. [2021-12-14 14:40:21,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9226 states and 15632 transitions. [2021-12-14 14:40:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 14:40:21,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:21,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:21,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 14:40:21,421 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash 841308180, now seen corresponding path program 1 times [2021-12-14 14:40:21,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:21,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174037299] [2021-12-14 14:40:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:21,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 14:40:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 14:40:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 14:40:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 14:40:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 14:40:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:21,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:21,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174037299] [2021-12-14 14:40:21,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174037299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:21,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:21,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:21,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125951342] [2021-12-14 14:40:21,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:21,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:21,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:21,504 INFO L87 Difference]: Start difference. First operand 9226 states and 15632 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:22,765 INFO L93 Difference]: Finished difference Result 23978 states and 41389 transitions. [2021-12-14 14:40:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-12-14 14:40:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:22,821 INFO L225 Difference]: With dead ends: 23978 [2021-12-14 14:40:22,821 INFO L226 Difference]: Without dead ends: 16343 [2021-12-14 14:40:22,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:22,850 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1035 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:22,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 1353 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 14:40:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16343 states. [2021-12-14 14:40:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16343 to 16179. [2021-12-14 14:40:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16179 states, 13395 states have (on average 1.6020156774916015) internal successors, (21459), 13400 states have internal predecessors, (21459), 2763 states have call successors, (2763), 16 states have call predecessors, (2763), 20 states have return successors, (3102), 2762 states have call predecessors, (3102), 2762 states have call successors, (3102) [2021-12-14 14:40:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16179 states to 16179 states and 27324 transitions. [2021-12-14 14:40:23,548 INFO L78 Accepts]: Start accepts. Automaton has 16179 states and 27324 transitions. Word has length 112 [2021-12-14 14:40:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 16179 states and 27324 transitions. [2021-12-14 14:40:23,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 16179 states and 27324 transitions. [2021-12-14 14:40:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 14:40:23,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:23,566 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:23,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 14:40:23,567 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash 481953966, now seen corresponding path program 1 times [2021-12-14 14:40:23,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:23,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576410623] [2021-12-14 14:40:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:23,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 14:40:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 14:40:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:40:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 14:40:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 14:40:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:23,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576410623] [2021-12-14 14:40:23,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576410623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:23,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:23,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:23,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580590333] [2021-12-14 14:40:23,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:23,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:23,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:23,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:23,657 INFO L87 Difference]: Start difference. First operand 16179 states and 27324 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:25,438 INFO L93 Difference]: Finished difference Result 42944 states and 73988 transitions. [2021-12-14 14:40:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:25,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-12-14 14:40:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:25,556 INFO L225 Difference]: With dead ends: 42944 [2021-12-14 14:40:25,557 INFO L226 Difference]: Without dead ends: 28998 [2021-12-14 14:40:25,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:25,599 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 1032 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:25,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 1338 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:40:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28998 states. [2021-12-14 14:40:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28998 to 28834. [2021-12-14 14:40:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28834 states, 24011 states have (on average 1.5977260422306443) internal successors, (38363), 24016 states have internal predecessors, (38363), 4802 states have call successors, (4802), 16 states have call predecessors, (4802), 20 states have return successors, (5415), 4801 states have call predecessors, (5415), 4801 states have call successors, (5415) [2021-12-14 14:40:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28834 states to 28834 states and 48580 transitions. [2021-12-14 14:40:26,872 INFO L78 Accepts]: Start accepts. Automaton has 28834 states and 48580 transitions. Word has length 113 [2021-12-14 14:40:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:26,873 INFO L470 AbstractCegarLoop]: Abstraction has 28834 states and 48580 transitions. [2021-12-14 14:40:26,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 28834 states and 48580 transitions. [2021-12-14 14:40:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 14:40:26,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:26,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:26,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 14:40:26,888 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1928279346, now seen corresponding path program 1 times [2021-12-14 14:40:26,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:26,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109910760] [2021-12-14 14:40:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:26,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 14:40:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 14:40:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:40:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 14:40:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 14:40:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:26,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109910760] [2021-12-14 14:40:26,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109910760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:26,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:26,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:26,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554439187] [2021-12-14 14:40:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:26,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:26,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:26,952 INFO L87 Difference]: Start difference. First operand 28834 states and 48580 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:29,414 INFO L93 Difference]: Finished difference Result 78706 states and 134747 transitions. [2021-12-14 14:40:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:29,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-14 14:40:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:29,603 INFO L225 Difference]: With dead ends: 78706 [2021-12-14 14:40:29,603 INFO L226 Difference]: Without dead ends: 52877 [2021-12-14 14:40:29,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:29,677 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1038 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:29,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1326 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 14:40:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52877 states. [2021-12-14 14:40:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52877 to 52713. [2021-12-14 14:40:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52713 states, 44175 states have (on average 1.5921222410865874) internal successors, (70332), 44180 states have internal predecessors, (70332), 8517 states have call successors, (8517), 16 states have call predecessors, (8517), 20 states have return successors, (9662), 8516 states have call predecessors, (9662), 8516 states have call successors, (9662) [2021-12-14 14:40:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52713 states to 52713 states and 88511 transitions. [2021-12-14 14:40:32,092 INFO L78 Accepts]: Start accepts. Automaton has 52713 states and 88511 transitions. Word has length 114 [2021-12-14 14:40:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:32,092 INFO L470 AbstractCegarLoop]: Abstraction has 52713 states and 88511 transitions. [2021-12-14 14:40:32,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 52713 states and 88511 transitions. [2021-12-14 14:40:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-14 14:40:32,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:32,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:32,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 14:40:32,112 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash 329987790, now seen corresponding path program 1 times [2021-12-14 14:40:32,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:32,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231534758] [2021-12-14 14:40:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:32,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 14:40:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 14:40:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 14:40:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 14:40:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-14 14:40:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:32,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:32,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231534758] [2021-12-14 14:40:32,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231534758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:32,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:32,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:40:32,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183063676] [2021-12-14 14:40:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:32,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:40:32,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:40:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:40:32,199 INFO L87 Difference]: Start difference. First operand 52713 states and 88511 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:35,905 INFO L93 Difference]: Finished difference Result 98477 states and 168934 transitions. [2021-12-14 14:40:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:40:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 115 [2021-12-14 14:40:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:36,697 INFO L225 Difference]: With dead ends: 98477 [2021-12-14 14:40:36,698 INFO L226 Difference]: Without dead ends: 98336 [2021-12-14 14:40:36,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:40:36,740 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 1034 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:36,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 1324 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:40:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98336 states. [2021-12-14 14:40:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98336 to 98172. [2021-12-14 14:40:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98172 states, 82835 states have (on average 1.585102915434297) internal successors, (131302), 82840 states have internal predecessors, (131302), 15316 states have call successors, (15316), 16 states have call predecessors, (15316), 20 states have return successors, (17507), 15315 states have call predecessors, (17507), 15315 states have call successors, (17507) [2021-12-14 14:40:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98172 states to 98172 states and 164125 transitions. [2021-12-14 14:40:41,449 INFO L78 Accepts]: Start accepts. Automaton has 98172 states and 164125 transitions. Word has length 115 [2021-12-14 14:40:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:41,450 INFO L470 AbstractCegarLoop]: Abstraction has 98172 states and 164125 transitions. [2021-12-14 14:40:41,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 14:40:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 98172 states and 164125 transitions. [2021-12-14 14:40:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 14:40:41,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:40:41,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:40:41,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 14:40:41,467 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:40:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:40:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash -737519213, now seen corresponding path program 1 times [2021-12-14 14:40:41,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:40:41,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019363933] [2021-12-14 14:40:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:40:41,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:40:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:40:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:40:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:40:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:40:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:40:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:40:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 14:40:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 14:40:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 14:40:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 14:40:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 14:40:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:40:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:40:41,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:40:41,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019363933] [2021-12-14 14:40:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019363933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:40:41,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:40:41,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 14:40:41,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964166602] [2021-12-14 14:40:41,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:40:41,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 14:40:41,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:40:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 14:40:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:40:41,581 INFO L87 Difference]: Start difference. First operand 98172 states and 164125 transitions. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-14 14:40:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:40:45,530 INFO L93 Difference]: Finished difference Result 98326 states and 167632 transitions. [2021-12-14 14:40:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:40:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 116 [2021-12-14 14:40:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:40:45,532 INFO L225 Difference]: With dead ends: 98326 [2021-12-14 14:40:45,532 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 14:40:45,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-12-14 14:40:45,797 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1022 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:40:45,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1753 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 14:40:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 14:40:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 14:40:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:40:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 14:40:45,806 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2021-12-14 14:40:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:40:45,806 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 14:40:45,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-14 14:40:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 14:40:45,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 14:40:45,809 INFO L764 garLoopResultBuilder]: Registering result SAFE for location outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 14:40:45,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 14:40:45,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.