./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/email_spec9_product12.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_spec9_product12.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 4d7925e6725ebc9ccc1628dac3a92336bad7d7149419f1b3b2e679ed4e3055d5 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:42:16,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:42:16,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:42:16,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:42:16,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:42:16,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:42:16,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:42:16,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:42:16,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:42:16,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:42:16,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:42:16,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:42:16,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:42:16,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:42:16,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:42:16,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:42:16,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:42:16,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:42:16,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:42:16,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:42:16,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:42:16,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:42:16,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:42:16,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:42:16,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:42:16,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:42:16,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:42:16,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:42:16,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:42:16,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:42:16,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:42:16,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:42:16,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:42:16,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:42:16,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:42:16,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:42:16,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:42:16,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:42:16,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:42:16,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:42:16,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:42:16,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:42:16,362 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:42:16,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:42:16,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:42:16,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:42:16,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:42:16,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:42:16,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:42:16,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:42:16,365 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:42:16,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:42:16,366 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:42:16,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:42:16,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:42:16,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:42:16,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:42:16,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:42:16,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:42:16,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:42:16,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:42:16,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:42:16,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:42:16,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:42:16,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:42:16,368 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:42:16,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:42:16,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:42:16,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:42:16,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d7925e6725ebc9ccc1628dac3a92336bad7d7149419f1b3b2e679ed4e3055d5 [2021-12-14 14:42:16,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:42:16,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:42:16,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:42:16,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:42:16,587 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:42:16,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec9_product12.cil.c [2021-12-14 14:42:16,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872978d62/21551b564baf4881a954177cfce83b99/FLAG47bdc0de9 [2021-12-14 14:42:17,080 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:42:17,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec9_product12.cil.c [2021-12-14 14:42:17,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872978d62/21551b564baf4881a954177cfce83b99/FLAG47bdc0de9 [2021-12-14 14:42:17,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872978d62/21551b564baf4881a954177cfce83b99 [2021-12-14 14:42:17,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:42:17,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:42:17,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:42:17,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:42:17,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:42:17,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321e19d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17, skipping insertion in model container [2021-12-14 14:42:17,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:42:17,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:42:17,460 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_spec9_product12.cil.c[29763,29776] [2021-12-14 14:42:17,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:42:17,507 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:42:17,558 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_spec9_product12.cil.c[29763,29776] [2021-12-14 14:42:17,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:42:17,599 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:42:17,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17 WrapperNode [2021-12-14 14:42:17,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:42:17,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:42:17,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:42:17,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:42:17,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,704 INFO L137 Inliner]: procedures = 123, calls = 191, calls flagged for inlining = 51, calls inlined = 41, statements flattened = 834 [2021-12-14 14:42:17,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:42:17,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:42:17,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:42:17,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:42:17,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:42:17,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:42:17,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:42:17,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:42:17,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (1/1) ... [2021-12-14 14:42:17,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:42:17,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:42:17,798 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 14:42:17,800 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 14:42:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-12-14 14:42:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-12-14 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-12-14 14:42:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-12-14 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-14 14:42:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-14 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-14 14:42:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-14 14:42:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-12-14 14:42:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-12-14 14:42:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-12-14 14:42:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-12-14 14:42:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-12-14 14:42:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-12-14 14:42:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-14 14:42:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-14 14:42:17,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-14 14:42:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:42:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-12-14 14:42:17,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-12-14 14:42:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-12-14 14:42:17,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-12-14 14:42:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-14 14:42:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-14 14:42:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-14 14:42:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-14 14:42:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-12-14 14:42:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-12-14 14:42:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-12-14 14:42:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-12-14 14:42:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:42:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-12-14 14:42:17,829 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-12-14 14:42:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:42:17,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:42:17,954 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:42:17,955 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:42:18,392 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:42:18,398 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:42:18,398 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 14:42:18,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:42:18 BoogieIcfgContainer [2021-12-14 14:42:18,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:42:18,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:42:18,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:42:18,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:42:18,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:42:17" (1/3) ... [2021-12-14 14:42:18,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e52304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:42:18, skipping insertion in model container [2021-12-14 14:42:18,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:42:17" (2/3) ... [2021-12-14 14:42:18,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e52304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:42:18, skipping insertion in model container [2021-12-14 14:42:18,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:42:18" (3/3) ... [2021-12-14 14:42:18,405 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product12.cil.c [2021-12-14 14:42:18,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:42:18,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:42:18,438 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:42:18,443 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 14:42:18,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:42:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 206 states have (on average 1.5533980582524272) internal successors, (320), 210 states have internal predecessors, (320), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-14 14:42:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 14:42:18,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:18,467 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 14:42:18,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2039353953, now seen corresponding path program 1 times [2021-12-14 14:42:18,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:18,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364180446] [2021-12-14 14:42:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:18,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:42:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:42:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:42:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:42:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 14:42:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:42:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 14:42:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:18,909 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 14:42:18,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364180446] [2021-12-14 14:42:18,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364180446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:42:18,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79345253] [2021-12-14 14:42:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:18,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:42:18,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:42:18,914 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 14:42:18,917 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 14:42:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-14 14:42:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:42:19,311 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 14:42:19,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:42:19,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79345253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:19,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:42:19,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2021-12-14 14:42:19,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815016809] [2021-12-14 14:42:19,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:19,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 14:42:19,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 14:42:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:42:19,344 INFO L87 Difference]: Start difference. First operand has 262 states, 206 states have (on average 1.5533980582524272) internal successors, (320), 210 states have internal predecessors, (320), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:19,374 INFO L93 Difference]: Finished difference Result 375 states and 558 transitions. [2021-12-14 14:42:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 14:42:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2021-12-14 14:42:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:19,385 INFO L225 Difference]: With dead ends: 375 [2021-12-14 14:42:19,386 INFO L226 Difference]: Without dead ends: 255 [2021-12-14 14:42:19,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:42:19,390 INFO L933 BasicCegarLoop]: 394 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, 394 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 14:42:19,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:42:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-14 14:42:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-12-14 14:42:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 200 states have (on average 1.545) internal successors, (309), 203 states have internal predecessors, (309), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-14 14:42:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 386 transitions. [2021-12-14 14:42:19,432 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 386 transitions. Word has length 86 [2021-12-14 14:42:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:19,434 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 386 transitions. [2021-12-14 14:42:19,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 386 transitions. [2021-12-14 14:42:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 14:42:19,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:19,438 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 14:42:19,460 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 14:42:19,660 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 14:42:19,661 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash 71453907, now seen corresponding path program 1 times [2021-12-14 14:42:19,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:19,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158382681] [2021-12-14 14:42:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:19,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:42:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:42:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:42:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 14:42:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 14:42:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:42:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 14:42:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:19,818 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 14:42:19,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158382681] [2021-12-14 14:42:19,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158382681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:42:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423846264] [2021-12-14 14:42:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:19,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:42:19,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:42:19,824 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 14:42:19,825 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 14:42:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:42:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:42:20,133 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 14:42:20,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:42:20,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423846264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:20,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:42:20,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-14 14:42:20,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258849876] [2021-12-14 14:42:20,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:20,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:42:20,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:20,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:42:20,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:42:20,136 INFO L87 Difference]: Start difference. First operand 255 states and 386 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:20,164 INFO L93 Difference]: Finished difference Result 365 states and 539 transitions. [2021-12-14 14:42:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:42:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-12-14 14:42:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:20,169 INFO L225 Difference]: With dead ends: 365 [2021-12-14 14:42:20,169 INFO L226 Difference]: Without dead ends: 258 [2021-12-14 14:42:20,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 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 14:42:20,171 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 1 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 766 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 14:42:20,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 766 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:42:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-14 14:42:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-12-14 14:42:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 202 states have (on average 1.5396039603960396) internal successors, (311), 205 states have internal predecessors, (311), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-14 14:42:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 388 transitions. [2021-12-14 14:42:20,186 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 388 transitions. Word has length 87 [2021-12-14 14:42:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:20,188 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 388 transitions. [2021-12-14 14:42:20,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 388 transitions. [2021-12-14 14:42:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 14:42:20,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:20,195 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 14:42:20,214 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 14:42:20,413 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 14:42:20,413 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash -153867190, now seen corresponding path program 1 times [2021-12-14 14:42:20,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:20,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043030973] [2021-12-14 14:42:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:20,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:42:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:42:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:42:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 14:42:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 14:42:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 14:42:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:42:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,520 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 14:42:20,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043030973] [2021-12-14 14:42:20,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043030973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:42:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719148373] [2021-12-14 14:42:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:20,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:42:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:42:20,522 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 14:42:20,523 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 14:42:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:20,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:42:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:42:20,812 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 14:42:20,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:42:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719148373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:20,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:42:20,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-14 14:42:20,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718836161] [2021-12-14 14:42:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:20,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:42:20,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:42:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:42:20,816 INFO L87 Difference]: Start difference. First operand 257 states and 388 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:20,834 INFO L93 Difference]: Finished difference Result 539 states and 827 transitions. [2021-12-14 14:42:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:42:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-12-14 14:42:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:20,836 INFO L225 Difference]: With dead ends: 539 [2021-12-14 14:42:20,837 INFO L226 Difference]: Without dead ends: 309 [2021-12-14 14:42:20,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 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 14:42:20,838 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 99 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 744 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 14:42:20,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 744 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:42:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-14 14:42:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 301. [2021-12-14 14:42:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 235 states have (on average 1.553191489361702) internal successors, (365), 238 states have internal predecessors, (365), 50 states have call successors, (50), 15 states have call predecessors, (50), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-14 14:42:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 464 transitions. [2021-12-14 14:42:20,854 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 464 transitions. Word has length 93 [2021-12-14 14:42:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 464 transitions. [2021-12-14 14:42:20,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 464 transitions. [2021-12-14 14:42:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 14:42:20,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:20,856 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 14:42:20,878 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 14:42:21,074 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 14:42:21,075 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1701782700, now seen corresponding path program 1 times [2021-12-14 14:42:21,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:21,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899907667] [2021-12-14 14:42:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:21,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 14:42:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 14:42:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 14:42:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 14:42:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 14:42:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 14:42:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:42:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,157 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 14:42:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899907667] [2021-12-14 14:42:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899907667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:42:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458222351] [2021-12-14 14:42:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:21,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:42:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:42:21,159 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 14:42:21,204 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 14:42:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 14:42:21,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:42:21,526 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 14:42:21,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:42:21,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458222351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:21,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:42:21,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-14 14:42:21,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348066470] [2021-12-14 14:42:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:21,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:42:21,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:42:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:42:21,528 INFO L87 Difference]: Start difference. First operand 301 states and 464 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:21,604 INFO L93 Difference]: Finished difference Result 593 states and 918 transitions. [2021-12-14 14:42:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:42:21,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 94 [2021-12-14 14:42:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:21,608 INFO L225 Difference]: With dead ends: 593 [2021-12-14 14:42:21,614 INFO L226 Difference]: Without dead ends: 303 [2021-12-14 14:42:21,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:42:21,615 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 117 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1372 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 14:42:21,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1372 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:42:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-14 14:42:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-12-14 14:42:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 236 states have (on average 1.5508474576271187) internal successors, (366), 240 states have internal predecessors, (366), 50 states have call successors, (50), 15 states have call predecessors, (50), 16 states have return successors, (51), 49 states have call predecessors, (51), 49 states have call successors, (51) [2021-12-14 14:42:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 467 transitions. [2021-12-14 14:42:21,627 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 467 transitions. Word has length 94 [2021-12-14 14:42:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:21,627 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 467 transitions. [2021-12-14 14:42:21,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 467 transitions. [2021-12-14 14:42:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-14 14:42:21,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:21,629 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 14:42:21,656 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 14:42:21,846 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 14:42:21,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:21,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 361139953, now seen corresponding path program 1 times [2021-12-14 14:42:21,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:21,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195230868] [2021-12-14 14:42:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:21,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 14:42:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 14:42:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 14:42:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 14:42:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 14:42:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 14:42:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:21,938 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 14:42:21,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195230868] [2021-12-14 14:42:21,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195230868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:42:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151902101] [2021-12-14 14:42:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:21,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:42:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:42:21,940 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 14:42:21,941 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 14:42:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 14:42:22,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:42:22,241 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 14:42:22,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:42:22,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151902101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:22,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:42:22,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-12-14 14:42:22,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505749866] [2021-12-14 14:42:22,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:22,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:42:22,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:42:22,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:42:22,243 INFO L87 Difference]: Start difference. First operand 303 states and 467 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:22,290 INFO L93 Difference]: Finished difference Result 595 states and 923 transitions. [2021-12-14 14:42:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:42:22,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2021-12-14 14:42:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:22,292 INFO L225 Difference]: With dead ends: 595 [2021-12-14 14:42:22,292 INFO L226 Difference]: Without dead ends: 305 [2021-12-14 14:42:22,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:42:22,294 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 116 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1361 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 14:42:22,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1361 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:42:22,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-14 14:42:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-12-14 14:42:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 237 states have (on average 1.5485232067510548) internal successors, (367), 242 states have internal predecessors, (367), 50 states have call successors, (50), 15 states have call predecessors, (50), 17 states have return successors, (56), 49 states have call predecessors, (56), 49 states have call successors, (56) [2021-12-14 14:42:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 473 transitions. [2021-12-14 14:42:22,331 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 473 transitions. Word has length 95 [2021-12-14 14:42:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:22,332 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 473 transitions. [2021-12-14 14:42:22,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 473 transitions. [2021-12-14 14:42:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-14 14:42:22,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:22,334 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 14:42:22,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 14:42:22,534 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 14:42:22,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash 639964823, now seen corresponding path program 1 times [2021-12-14 14:42:22,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:22,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910480135] [2021-12-14 14:42:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:22,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:42:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 14:42:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:42:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 14:42:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 14:42:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:22,645 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 14:42:22,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:22,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910480135] [2021-12-14 14:42:22,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910480135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:22,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:22,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 14:42:22,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186221988] [2021-12-14 14:42:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:22,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:42:22,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:42:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:42:22,647 INFO L87 Difference]: Start difference. First operand 305 states and 473 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:23,294 INFO L93 Difference]: Finished difference Result 640 states and 998 transitions. [2021-12-14 14:42:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:42:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2021-12-14 14:42:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:23,297 INFO L225 Difference]: With dead ends: 640 [2021-12-14 14:42:23,297 INFO L226 Difference]: Without dead ends: 358 [2021-12-14 14:42:23,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:42:23,298 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 676 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:23,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 1203 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 14:42:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-14 14:42:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 305. [2021-12-14 14:42:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 237 states have (on average 1.5485232067510548) internal successors, (367), 242 states have internal predecessors, (367), 50 states have call successors, (50), 15 states have call predecessors, (50), 17 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2021-12-14 14:42:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 472 transitions. [2021-12-14 14:42:23,325 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 472 transitions. Word has length 96 [2021-12-14 14:42:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:23,325 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 472 transitions. [2021-12-14 14:42:23,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 472 transitions. [2021-12-14 14:42:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-14 14:42:23,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:23,327 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 14:42:23,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:42:23,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1163878910, now seen corresponding path program 2 times [2021-12-14 14:42:23,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212344490] [2021-12-14 14:42:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:23,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 14:42:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 14:42:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 14:42:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 14:42:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 14:42:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:23,423 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 14:42:23,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212344490] [2021-12-14 14:42:23,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212344490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:23,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:23,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 14:42:23,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236928369] [2021-12-14 14:42:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:23,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:42:23,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:23,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:42:23,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:42:23,435 INFO L87 Difference]: Start difference. First operand 305 states and 472 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:24,151 INFO L93 Difference]: Finished difference Result 642 states and 1001 transitions. [2021-12-14 14:42:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:42:24,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-12-14 14:42:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:24,154 INFO L225 Difference]: With dead ends: 642 [2021-12-14 14:42:24,154 INFO L226 Difference]: Without dead ends: 360 [2021-12-14 14:42:24,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:42:24,156 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 672 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:24,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 1204 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 14:42:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-14 14:42:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 307. [2021-12-14 14:42:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 238 states have (on average 1.546218487394958) internal successors, (368), 244 states have internal predecessors, (368), 50 states have call successors, (50), 15 states have call predecessors, (50), 18 states have return successors, (57), 49 states have call predecessors, (57), 49 states have call successors, (57) [2021-12-14 14:42:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 475 transitions. [2021-12-14 14:42:24,169 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 475 transitions. Word has length 97 [2021-12-14 14:42:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:24,169 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 475 transitions. [2021-12-14 14:42:24,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:42:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 475 transitions. [2021-12-14 14:42:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 14:42:24,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:24,171 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 14:42:24,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:42:24,171 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:24,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash -223956590, now seen corresponding path program 1 times [2021-12-14 14:42:24,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:24,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226783278] [2021-12-14 14:42:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:24,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 14:42:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 14:42:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 14:42:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 14:42:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:24,259 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 14:42:24,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226783278] [2021-12-14 14:42:24,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226783278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:24,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:24,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 14:42:24,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702104317] [2021-12-14 14:42:24,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:24,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 14:42:24,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 14:42:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:42:24,261 INFO L87 Difference]: Start difference. First operand 307 states and 475 transitions. Second operand has 11 states, 10 states have (on average 6.8) internal successors, (68), 8 states have internal predecessors, (68), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 14:42:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:25,271 INFO L93 Difference]: Finished difference Result 640 states and 996 transitions. [2021-12-14 14:42:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 14:42:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 8 states have internal predecessors, (68), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 98 [2021-12-14 14:42:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:25,273 INFO L225 Difference]: With dead ends: 640 [2021-12-14 14:42:25,273 INFO L226 Difference]: Without dead ends: 360 [2021-12-14 14:42:25,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-12-14 14:42:25,274 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 778 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:25,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1574 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:42:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-14 14:42:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 307. [2021-12-14 14:42:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 238 states have (on average 1.546218487394958) internal successors, (368), 244 states have internal predecessors, (368), 50 states have call successors, (50), 15 states have call predecessors, (50), 18 states have return successors, (56), 49 states have call predecessors, (56), 49 states have call successors, (56) [2021-12-14 14:42:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 474 transitions. [2021-12-14 14:42:25,316 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 474 transitions. Word has length 98 [2021-12-14 14:42:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:25,316 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 474 transitions. [2021-12-14 14:42:25,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 8 states have internal predecessors, (68), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 14:42:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 474 transitions. [2021-12-14 14:42:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 14:42:25,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:25,318 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 14:42:25,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:42:25,318 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash 749423346, now seen corresponding path program 2 times [2021-12-14 14:42:25,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:25,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562143700] [2021-12-14 14:42:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:25,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 14:42:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:42:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:42:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 14:42:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:25,468 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 14:42:25,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:25,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562143700] [2021-12-14 14:42:25,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562143700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:25,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:25,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 14:42:25,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856212656] [2021-12-14 14:42:25,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:25,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 14:42:25,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 14:42:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:42:25,471 INFO L87 Difference]: Start difference. First operand 307 states and 474 transitions. Second operand has 11 states, 10 states have (on average 6.9) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 14:42:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:26,484 INFO L93 Difference]: Finished difference Result 642 states and 1002 transitions. [2021-12-14 14:42:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 14:42:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.9) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 99 [2021-12-14 14:42:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:26,487 INFO L225 Difference]: With dead ends: 642 [2021-12-14 14:42:26,487 INFO L226 Difference]: Without dead ends: 362 [2021-12-14 14:42:26,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-12-14 14:42:26,490 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 774 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:26,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1575 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:42:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-14 14:42:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 309. [2021-12-14 14:42:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 239 states have (on average 1.5439330543933054) internal successors, (369), 246 states have internal predecessors, (369), 50 states have call successors, (50), 15 states have call predecessors, (50), 19 states have return successors, (61), 49 states have call predecessors, (61), 49 states have call successors, (61) [2021-12-14 14:42:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 480 transitions. [2021-12-14 14:42:26,525 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 480 transitions. Word has length 99 [2021-12-14 14:42:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:26,526 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 480 transitions. [2021-12-14 14:42:26,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.9) internal successors, (69), 8 states have internal predecessors, (69), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 14:42:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 480 transitions. [2021-12-14 14:42:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 14:42:26,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:26,527 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 14:42:26,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:42:26,527 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 961117165, now seen corresponding path program 1 times [2021-12-14 14:42:26,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210852912] [2021-12-14 14:42:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:26,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 14:42:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:42:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:42:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 14:42:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,596 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 14:42:26,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:26,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210852912] [2021-12-14 14:42:26,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210852912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:42:26,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647318387] [2021-12-14 14:42:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:26,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:42:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:42:26,597 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 14:42:26,598 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 14:42:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:42:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:42:26,870 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 14:42:26,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:42:26,978 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 14:42:26,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647318387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:42:26,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:42:26,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-12-14 14:42:26,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939532178] [2021-12-14 14:42:26,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:42:26,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 14:42:26,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 14:42:26,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:26,982 INFO L87 Difference]: Start difference. First operand 309 states and 480 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 14:42:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:27,943 INFO L93 Difference]: Finished difference Result 796 states and 1300 transitions. [2021-12-14 14:42:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:42:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 100 [2021-12-14 14:42:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:27,947 INFO L225 Difference]: With dead ends: 796 [2021-12-14 14:42:27,947 INFO L226 Difference]: Without dead ends: 689 [2021-12-14 14:42:27,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:42:27,948 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 867 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:27,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1899 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:42:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-12-14 14:42:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 612. [2021-12-14 14:42:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 478 states have (on average 1.604602510460251) internal successors, (767), 485 states have internal predecessors, (767), 114 states have call successors, (114), 15 states have call predecessors, (114), 19 states have return successors, (135), 113 states have call predecessors, (135), 113 states have call successors, (135) [2021-12-14 14:42:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1016 transitions. [2021-12-14 14:42:27,978 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1016 transitions. Word has length 100 [2021-12-14 14:42:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:27,978 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1016 transitions. [2021-12-14 14:42:27,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 14:42:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1016 transitions. [2021-12-14 14:42:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 14:42:27,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:27,981 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 14:42:28,002 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 14:42:28,200 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 14:42:28,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:28,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1027284112, now seen corresponding path program 1 times [2021-12-14 14:42:28,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:28,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671582481] [2021-12-14 14:42:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:28,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 14:42:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 14:42:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 14:42:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 14:42:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:28,300 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 14:42:28,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671582481] [2021-12-14 14:42:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671582481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:28,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:28,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:28,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321596054] [2021-12-14 14:42:28,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:28,303 INFO L87 Difference]: Start difference. First operand 612 states and 1016 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:29,172 INFO L93 Difference]: Finished difference Result 1517 states and 2579 transitions. [2021-12-14 14:42:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 106 [2021-12-14 14:42:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:29,177 INFO L225 Difference]: With dead ends: 1517 [2021-12-14 14:42:29,177 INFO L226 Difference]: Without dead ends: 973 [2021-12-14 14:42:29,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:29,180 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 665 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:29,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 1011 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:42:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-14 14:42:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 912. [2021-12-14 14:42:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 714 states have (on average 1.6134453781512605) internal successors, (1152), 721 states have internal predecessors, (1152), 178 states have call successors, (178), 15 states have call predecessors, (178), 19 states have return successors, (209), 177 states have call predecessors, (209), 177 states have call successors, (209) [2021-12-14 14:42:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1539 transitions. [2021-12-14 14:42:29,217 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1539 transitions. Word has length 106 [2021-12-14 14:42:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:29,217 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1539 transitions. [2021-12-14 14:42:29,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1539 transitions. [2021-12-14 14:42:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-14 14:42:29,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:29,221 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 14:42:29,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:42:29,221 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:29,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1707978199, now seen corresponding path program 1 times [2021-12-14 14:42:29,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:29,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706750187] [2021-12-14 14:42:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:29,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:42:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 14:42:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 14:42:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 14:42:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,292 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 14:42:29,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:29,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706750187] [2021-12-14 14:42:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706750187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:29,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:29,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:29,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651641602] [2021-12-14 14:42:29,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:29,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:29,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:29,293 INFO L87 Difference]: Start difference. First operand 912 states and 1539 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:29,838 INFO L93 Difference]: Finished difference Result 2232 states and 3824 transitions. [2021-12-14 14:42:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 107 [2021-12-14 14:42:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:29,844 INFO L225 Difference]: With dead ends: 2232 [2021-12-14 14:42:29,845 INFO L226 Difference]: Without dead ends: 1441 [2021-12-14 14:42:29,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:29,847 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 663 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:29,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1009 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 14:42:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-12-14 14:42:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1380. [2021-12-14 14:42:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1087 states have (on average 1.6182152713891444) internal successors, (1759), 1094 states have internal predecessors, (1759), 273 states have call successors, (273), 15 states have call predecessors, (273), 19 states have return successors, (304), 272 states have call predecessors, (304), 272 states have call successors, (304) [2021-12-14 14:42:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2336 transitions. [2021-12-14 14:42:29,928 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2336 transitions. Word has length 107 [2021-12-14 14:42:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:29,928 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 2336 transitions. [2021-12-14 14:42:29,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2336 transitions. [2021-12-14 14:42:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-14 14:42:29,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:29,933 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 14:42:29,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 14:42:29,933 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1136510194, now seen corresponding path program 1 times [2021-12-14 14:42:29,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:29,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87475271] [2021-12-14 14:42:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:29,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 14:42:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 14:42:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 14:42:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 14:42:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:29,994 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 14:42:29,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:29,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87475271] [2021-12-14 14:42:29,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87475271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:29,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:29,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:29,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832441399] [2021-12-14 14:42:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:29,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:29,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:29,996 INFO L87 Difference]: Start difference. First operand 1380 states and 2336 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:30,561 INFO L93 Difference]: Finished difference Result 3279 states and 5665 transitions. [2021-12-14 14:42:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:30,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 108 [2021-12-14 14:42:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:30,573 INFO L225 Difference]: With dead ends: 3279 [2021-12-14 14:42:30,574 INFO L226 Difference]: Without dead ends: 2145 [2021-12-14 14:42:30,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:30,578 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 661 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:30,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 987 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:42:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-12-14 14:42:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2084. [2021-12-14 14:42:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 1668 states have (on average 1.6223021582733812) internal successors, (2706), 1675 states have internal predecessors, (2706), 396 states have call successors, (396), 15 states have call predecessors, (396), 19 states have return successors, (443), 395 states have call predecessors, (443), 395 states have call successors, (443) [2021-12-14 14:42:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3545 transitions. [2021-12-14 14:42:30,673 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3545 transitions. Word has length 108 [2021-12-14 14:42:30,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:30,673 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 3545 transitions. [2021-12-14 14:42:30,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:30,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3545 transitions. [2021-12-14 14:42:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 14:42:30,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:30,680 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 14:42:30,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 14:42:30,680 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash -665915704, now seen corresponding path program 1 times [2021-12-14 14:42:30,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027241222] [2021-12-14 14:42:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:30,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 14:42:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 14:42:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 14:42:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 14:42:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:30,742 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 14:42:30,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027241222] [2021-12-14 14:42:30,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027241222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:30,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:30,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:30,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911262038] [2021-12-14 14:42:30,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:30,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:30,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:30,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:30,743 INFO L87 Difference]: Start difference. First operand 2084 states and 3545 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:31,353 INFO L93 Difference]: Finished difference Result 4898 states and 8519 transitions. [2021-12-14 14:42:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2021-12-14 14:42:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:31,369 INFO L225 Difference]: With dead ends: 4898 [2021-12-14 14:42:31,369 INFO L226 Difference]: Without dead ends: 3264 [2021-12-14 14:42:31,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:31,375 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 659 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:31,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 981 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:42:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2021-12-14 14:42:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3203. [2021-12-14 14:42:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 2608 states have (on average 1.624616564417178) internal successors, (4237), 2615 states have internal predecessors, (4237), 575 states have call successors, (575), 15 states have call predecessors, (575), 19 states have return successors, (648), 574 states have call predecessors, (648), 574 states have call successors, (648) [2021-12-14 14:42:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 5460 transitions. [2021-12-14 14:42:31,530 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 5460 transitions. Word has length 109 [2021-12-14 14:42:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:31,530 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 5460 transitions. [2021-12-14 14:42:31,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 5460 transitions. [2021-12-14 14:42:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 14:42:31,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:31,537 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 14:42:31,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 14:42:31,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1938092110, now seen corresponding path program 1 times [2021-12-14 14:42:31,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:31,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433515335] [2021-12-14 14:42:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:31,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:42:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 14:42:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:42:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 14:42:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:31,597 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 14:42:31,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433515335] [2021-12-14 14:42:31,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433515335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:31,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:31,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:31,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608640615] [2021-12-14 14:42:31,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:31,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:31,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:31,599 INFO L87 Difference]: Start difference. First operand 3203 states and 5460 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:32,260 INFO L93 Difference]: Finished difference Result 7816 states and 13618 transitions. [2021-12-14 14:42:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 110 [2021-12-14 14:42:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:32,285 INFO L225 Difference]: With dead ends: 7816 [2021-12-14 14:42:32,286 INFO L226 Difference]: Without dead ends: 5295 [2021-12-14 14:42:32,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:32,298 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 657 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:32,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1033 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:42:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2021-12-14 14:42:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 5234. [2021-12-14 14:42:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 4263 states have (on average 1.615998123387286) internal successors, (6889), 4270 states have internal predecessors, (6889), 951 states have call successors, (951), 15 states have call predecessors, (951), 19 states have return successors, (1068), 950 states have call predecessors, (1068), 950 states have call successors, (1068) [2021-12-14 14:42:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8908 transitions. [2021-12-14 14:42:32,580 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8908 transitions. Word has length 110 [2021-12-14 14:42:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:32,581 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 8908 transitions. [2021-12-14 14:42:32,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8908 transitions. [2021-12-14 14:42:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 14:42:32,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:32,592 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 14:42:32,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 14:42:32,592 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash -461540828, now seen corresponding path program 1 times [2021-12-14 14:42:32,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:32,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341878412] [2021-12-14 14:42:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:32,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:42:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 14:42:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 14:42:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 14:42:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:32,670 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 14:42:32,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:32,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341878412] [2021-12-14 14:42:32,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341878412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:32,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:32,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:32,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797610307] [2021-12-14 14:42:32,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:32,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:32,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:32,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:32,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:32,672 INFO L87 Difference]: Start difference. First operand 5234 states and 8908 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:33,412 INFO L93 Difference]: Finished difference Result 12958 states and 22527 transitions. [2021-12-14 14:42:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 111 [2021-12-14 14:42:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:33,461 INFO L225 Difference]: With dead ends: 12958 [2021-12-14 14:42:33,461 INFO L226 Difference]: Without dead ends: 8783 [2021-12-14 14:42:33,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:33,477 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 655 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:33,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 986 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:42:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8783 states. [2021-12-14 14:42:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8783 to 8722. [2021-12-14 14:42:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8722 states, 7145 states have (on average 1.6127361791462562) internal successors, (11523), 7152 states have internal predecessors, (11523), 1557 states have call successors, (1557), 15 states have call predecessors, (1557), 19 states have return successors, (1752), 1556 states have call predecessors, (1752), 1556 states have call successors, (1752) [2021-12-14 14:42:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 14832 transitions. [2021-12-14 14:42:33,907 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 14832 transitions. Word has length 111 [2021-12-14 14:42:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:33,907 INFO L470 AbstractCegarLoop]: Abstraction has 8722 states and 14832 transitions. [2021-12-14 14:42:33,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 14832 transitions. [2021-12-14 14:42:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 14:42:33,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:33,920 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 14:42:33,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 14:42:33,921 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1120917424, now seen corresponding path program 1 times [2021-12-14 14:42:33,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:33,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248333829] [2021-12-14 14:42:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:33,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 14:42:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:42:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 14:42:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:42:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:33,994 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 14:42:33,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:33,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248333829] [2021-12-14 14:42:33,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248333829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:33,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:33,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:33,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755641782] [2021-12-14 14:42:33,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:33,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:33,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:33,996 INFO L87 Difference]: Start difference. First operand 8722 states and 14832 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:35,090 INFO L93 Difference]: Finished difference Result 22617 states and 39233 transitions. [2021-12-14 14:42:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:35,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 112 [2021-12-14 14:42:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:35,148 INFO L225 Difference]: With dead ends: 22617 [2021-12-14 14:42:35,148 INFO L226 Difference]: Without dead ends: 15376 [2021-12-14 14:42:35,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:35,172 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 653 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:35,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1017 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 14:42:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15376 states. [2021-12-14 14:42:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15376 to 15315. [2021-12-14 14:42:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15315 states, 12535 states have (on average 1.6026326286398085) internal successors, (20089), 12542 states have internal predecessors, (20089), 2760 states have call successors, (2760), 15 states have call predecessors, (2760), 19 states have return successors, (3099), 2759 states have call predecessors, (3099), 2759 states have call successors, (3099) [2021-12-14 14:42:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15315 states to 15315 states and 25948 transitions. [2021-12-14 14:42:35,867 INFO L78 Accepts]: Start accepts. Automaton has 15315 states and 25948 transitions. Word has length 112 [2021-12-14 14:42:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:35,868 INFO L470 AbstractCegarLoop]: Abstraction has 15315 states and 25948 transitions. [2021-12-14 14:42:35,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 15315 states and 25948 transitions. [2021-12-14 14:42:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 14:42:35,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:35,888 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] [2021-12-14 14:42:35,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 14:42:35,888 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2139517149, now seen corresponding path program 1 times [2021-12-14 14:42:35,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:35,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289787894] [2021-12-14 14:42:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:35,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 14:42:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:42:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 14:42:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 14:42:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:35,946 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 14:42:35,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:35,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289787894] [2021-12-14 14:42:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289787894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:35,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:35,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:35,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305260014] [2021-12-14 14:42:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:35,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:35,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:35,948 INFO L87 Difference]: Start difference. First operand 15315 states and 25948 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:37,455 INFO L93 Difference]: Finished difference Result 40573 states and 70216 transitions. [2021-12-14 14:42:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:37,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 113 [2021-12-14 14:42:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:37,549 INFO L225 Difference]: With dead ends: 40573 [2021-12-14 14:42:37,550 INFO L226 Difference]: Without dead ends: 27346 [2021-12-14 14:42:37,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:37,586 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 651 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:37,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 992 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 14:42:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27346 states. [2021-12-14 14:42:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27346 to 27285. [2021-12-14 14:42:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27285 states, 22466 states have (on average 1.5978367310602688) internal successors, (35897), 22473 states have internal predecessors, (35897), 4799 states have call successors, (4799), 15 states have call predecessors, (4799), 19 states have return successors, (5412), 4798 states have call predecessors, (5412), 4798 states have call successors, (5412) [2021-12-14 14:42:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27285 states to 27285 states and 46108 transitions. [2021-12-14 14:42:38,762 INFO L78 Accepts]: Start accepts. Automaton has 27285 states and 46108 transitions. Word has length 113 [2021-12-14 14:42:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:38,763 INFO L470 AbstractCegarLoop]: Abstraction has 27285 states and 46108 transitions. [2021-12-14 14:42:38,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 27285 states and 46108 transitions. [2021-12-14 14:42:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-14 14:42:38,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:38,779 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 14:42:38,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 14:42:38,779 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:38,780 INFO L85 PathProgramCache]: Analyzing trace with hash 345033870, now seen corresponding path program 1 times [2021-12-14 14:42:38,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:38,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984102111] [2021-12-14 14:42:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:38,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 14:42:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:42:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 14:42:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 14:42:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:38,837 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 14:42:38,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:38,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984102111] [2021-12-14 14:42:38,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984102111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:38,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:38,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:38,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272669331] [2021-12-14 14:42:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:38,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:38,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:38,839 INFO L87 Difference]: Start difference. First operand 27285 states and 46108 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:40,991 INFO L93 Difference]: Finished difference Result 74360 states and 127815 transitions. [2021-12-14 14:42:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:40,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 114 [2021-12-14 14:42:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:41,195 INFO L225 Difference]: With dead ends: 74360 [2021-12-14 14:42:41,195 INFO L226 Difference]: Without dead ends: 49895 [2021-12-14 14:42:41,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:41,266 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 649 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:41,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 994 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 14:42:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49895 states. [2021-12-14 14:42:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49895 to 49834. [2021-12-14 14:42:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49834 states, 41300 states have (on average 1.5917191283292977) internal successors, (65738), 41307 states have internal predecessors, (65738), 8514 states have call successors, (8514), 15 states have call predecessors, (8514), 19 states have return successors, (9659), 8513 states have call predecessors, (9659), 8513 states have call successors, (9659) [2021-12-14 14:42:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49834 states to 49834 states and 83911 transitions. [2021-12-14 14:42:43,447 INFO L78 Accepts]: Start accepts. Automaton has 49834 states and 83911 transitions. Word has length 114 [2021-12-14 14:42:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:43,448 INFO L470 AbstractCegarLoop]: Abstraction has 49834 states and 83911 transitions. [2021-12-14 14:42:43,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 49834 states and 83911 transitions. [2021-12-14 14:42:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-14 14:42:43,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:43,469 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 14:42:43,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 14:42:43,469 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:43,469 INFO L85 PathProgramCache]: Analyzing trace with hash 866966051, now seen corresponding path program 1 times [2021-12-14 14:42:43,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:43,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236344735] [2021-12-14 14:42:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:43,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 14:42:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 14:42:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 14:42:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 14:42:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:43,557 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 14:42:43,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236344735] [2021-12-14 14:42:43,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236344735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:43,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:43,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:42:43,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647384602] [2021-12-14 14:42:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:43,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:42:43,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:42:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:42:43,559 INFO L87 Difference]: Start difference. First operand 49834 states and 83911 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:42:46,831 INFO L93 Difference]: Finished difference Result 92846 states and 159946 transitions. [2021-12-14 14:42:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:42:46,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 115 [2021-12-14 14:42:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:42:47,143 INFO L225 Difference]: With dead ends: 92846 [2021-12-14 14:42:47,143 INFO L226 Difference]: Without dead ends: 92739 [2021-12-14 14:42:47,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:42:47,183 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 647 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:42:47,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 992 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 14:42:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92739 states. [2021-12-14 14:42:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92739 to 92678. [2021-12-14 14:42:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92678 states, 77345 states have (on average 1.5841230848794363) internal successors, (122524), 77352 states have internal predecessors, (122524), 15313 states have call successors, (15313), 15 states have call predecessors, (15313), 19 states have return successors, (17504), 15312 states have call predecessors, (17504), 15312 states have call successors, (17504) [2021-12-14 14:42:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92678 states to 92678 states and 155341 transitions. [2021-12-14 14:42:51,421 INFO L78 Accepts]: Start accepts. Automaton has 92678 states and 155341 transitions. Word has length 115 [2021-12-14 14:42:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:42:51,422 INFO L470 AbstractCegarLoop]: Abstraction has 92678 states and 155341 transitions. [2021-12-14 14:42:51,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:42:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 92678 states and 155341 transitions. [2021-12-14 14:42:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 14:42:51,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:42:51,440 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 14:42:51,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 14:42:51,440 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:42:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:42:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1101885455, now seen corresponding path program 1 times [2021-12-14 14:42:51,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:42:51,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825440199] [2021-12-14 14:42:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:42:51,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:42:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:42:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:42:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:42:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:42:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:42:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:42:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 14:42:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 14:42:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 14:42:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-14 14:42:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:42:51,939 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 14:42:51,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:42:51,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825440199] [2021-12-14 14:42:51,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825440199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:42:51,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:42:51,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 14:42:51,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405000969] [2021-12-14 14:42:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:42:51,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 14:42:51,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:42:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 14:42:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:42:51,941 INFO L87 Difference]: Start difference. First operand 92678 states and 155341 transitions. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 14:43:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:43:00,337 INFO L93 Difference]: Finished difference Result 185071 states and 322138 transitions. [2021-12-14 14:43:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 14:43:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 116 [2021-12-14 14:43:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:43:01,100 INFO L225 Difference]: With dead ends: 185071 [2021-12-14 14:43:01,100 INFO L226 Difference]: Without dead ends: 184972 [2021-12-14 14:43:01,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=1527, Unknown=0, NotChecked=0, Total=1980 [2021-12-14 14:43:01,191 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 2631 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 5042 mSolverCounterSat, 1095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2631 SdHoareTripleChecker+Valid, 2837 SdHoareTripleChecker+Invalid, 6137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1095 IncrementalHoareTripleChecker+Valid, 5042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:43:01,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2631 Valid, 2837 Invalid, 6137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1095 Valid, 5042 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 14:43:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184972 states. [2021-12-14 14:43:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184972 to 184542. [2021-12-14 14:43:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184542 states, 154089 states have (on average 1.5850774552369085) internal successors, (244243), 153991 states have internal predecessors, (244243), 30409 states have call successors, (30409), 38 states have call predecessors, (30409), 43 states have return successors, (38058), 30518 states have call predecessors, (38058), 30406 states have call successors, (38058) [2021-12-14 14:43:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184542 states to 184542 states and 312710 transitions. [2021-12-14 14:43:10,701 INFO L78 Accepts]: Start accepts. Automaton has 184542 states and 312710 transitions. Word has length 116 [2021-12-14 14:43:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:43:10,701 INFO L470 AbstractCegarLoop]: Abstraction has 184542 states and 312710 transitions. [2021-12-14 14:43:10,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 14:43:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 184542 states and 312710 transitions. [2021-12-14 14:43:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-14 14:43:10,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:43:10,735 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, 1] [2021-12-14 14:43:10,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 14:43:10,735 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:43:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:43:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash 912607469, now seen corresponding path program 1 times [2021-12-14 14:43:10,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:43:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486414298] [2021-12-14 14:43:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:43:10,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:43:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 14:43:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 14:43:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:43:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 14:43:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 14:43:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 14:43:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 14:43:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 14:43:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 14:43:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 14:43:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:43:10,803 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 14:43:10,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:43:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486414298] [2021-12-14 14:43:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486414298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:43:10,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:43:10,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:43:10,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394050417] [2021-12-14 14:43:10,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:43:10,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:43:10,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:43:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:43:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:43:10,805 INFO L87 Difference]: Start difference. First operand 184542 states and 312710 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 4 states have internal predecessors, (82), 3 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)