./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/email_spec1_product12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_spec1_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 2f43e7267ed715243a41104ad5703ed473575064952f167333067630dfd5e9da --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 14:53:19,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:53:19,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:53:19,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:53:19,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:53:19,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:53:19,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:53:20,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:53:20,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:53:20,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:53:20,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:53:20,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:53:20,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:53:20,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:53:20,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:53:20,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:53:20,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:53:20,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:53:20,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:53:20,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:53:20,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:53:20,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:53:20,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:53:20,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:53:20,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:53:20,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:53:20,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:53:20,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:53:20,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:53:20,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:53:20,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:53:20,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:53:20,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:53:20,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:53:20,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:53:20,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:53:20,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:53:20,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:53:20,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:53:20,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:53:20,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:53:20,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:53:20,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:53:20,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:53:20,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:53:20,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:53:20,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:53:20,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:53:20,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:53:20,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:53:20,069 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:53:20,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:53:20,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:53:20,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:53:20,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:53:20,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:53:20,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:53:20,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:53:20,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:53:20,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:53:20,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:53:20,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:53:20,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:53:20,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:53:20,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:53:20,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:53:20,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:53:20,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:53:20,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:53:20,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:53:20,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:53:20,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:53:20,074 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:53:20,074 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:53:20,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:53:20,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:53:20,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f43e7267ed715243a41104ad5703ed473575064952f167333067630dfd5e9da [2021-12-17 14:53:20,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:53:20,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:53:20,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:53:20,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:53:20,297 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:53:20,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec1_product12.cil.c [2021-12-17 14:53:20,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2214c0fc/7a715a4f6a674384894b38411754214e/FLAGeab7fdda0 [2021-12-17 14:53:20,749 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:53:20,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec1_product12.cil.c [2021-12-17 14:53:20,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2214c0fc/7a715a4f6a674384894b38411754214e/FLAGeab7fdda0 [2021-12-17 14:53:21,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2214c0fc/7a715a4f6a674384894b38411754214e [2021-12-17 14:53:21,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:53:21,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:53:21,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:53:21,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:53:21,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:53:21,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f206f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21, skipping insertion in model container [2021-12-17 14:53:21,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:53:21,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:53:21,553 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_spec1_product12.cil.c[58861,58874] [2021-12-17 14:53:21,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:53:21,567 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:53:21,631 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_spec1_product12.cil.c[58861,58874] [2021-12-17 14:53:21,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:53:21,661 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:53:21,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21 WrapperNode [2021-12-17 14:53:21,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:53:21,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:53:21,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:53:21,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:53:21,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,745 INFO L137 Inliner]: procedures = 122, calls = 186, calls flagged for inlining = 50, calls inlined = 40, statements flattened = 820 [2021-12-17 14:53:21,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:53:21,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:53:21,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:53:21,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:53:21,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:53:21,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:53:21,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:53:21,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:53:21,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (1/1) ... [2021-12-17 14:53:21,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:53:21,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:53:21,835 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) [2021-12-17 14:53:21,840 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 [2021-12-17 14:53:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-12-17 14:53:21,864 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-12-17 14:53:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-12-17 14:53:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-12-17 14:53:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-17 14:53:21,865 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-17 14:53:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-17 14:53:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-17 14:53:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-12-17 14:53:21,875 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-12-17 14:53:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-12-17 14:53:21,875 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-12-17 14:53:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-12-17 14:53:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-12-17 14:53:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-17 14:53:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-17 14:53:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-17 14:53:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:53:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-12-17 14:53:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-12-17 14:53:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-12-17 14:53:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-12-17 14:53:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-17 14:53:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-17 14:53:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-17 14:53:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-17 14:53:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-12-17 14:53:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-12-17 14:53:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-12-17 14:53:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-12-17 14:53:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:53:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-12-17 14:53:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-12-17 14:53:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:53:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:53:22,070 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:53:22,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:53:22,408 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:53:22,414 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:53:22,414 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:53:22,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:53:22 BoogieIcfgContainer [2021-12-17 14:53:22,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:53:22,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:53:22,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:53:22,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:53:22,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:53:21" (1/3) ... [2021-12-17 14:53:22,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afea72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:53:22, skipping insertion in model container [2021-12-17 14:53:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:53:21" (2/3) ... [2021-12-17 14:53:22,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afea72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:53:22, skipping insertion in model container [2021-12-17 14:53:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:53:22" (3/3) ... [2021-12-17 14:53:22,422 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product12.cil.c [2021-12-17 14:53:22,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:53:22,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:53:22,456 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:53:22,462 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 [2021-12-17 14:53:22,462 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:53:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 205 states have (on average 1.5560975609756098) internal successors, (319), 209 states have internal predecessors, (319), 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) [2021-12-17 14:53:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 14:53:22,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:22,497 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] [2021-12-17 14:53:22,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -624496629, now seen corresponding path program 1 times [2021-12-17 14:53:22,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:22,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174370713] [2021-12-17 14:53:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:22,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:53:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:53:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:53:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 14:53:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 14:53:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:53:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 14:53:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 14:53:22,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:22,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174370713] [2021-12-17 14:53:22,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174370713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:53:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209147417] [2021-12-17 14:53:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:22,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:53:22,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:53:22,930 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) [2021-12-17 14:53:22,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:53:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 14:53:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:53:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 14:53:23,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:53:23,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209147417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:23,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:53:23,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2021-12-17 14:53:23,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497614683] [2021-12-17 14:53:23,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:23,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 14:53:23,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 14:53:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:53:23,363 INFO L87 Difference]: Start difference. First operand has 261 states, 205 states have (on average 1.5560975609756098) internal successors, (319), 209 states have internal predecessors, (319), 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) [2021-12-17 14:53:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:23,409 INFO L93 Difference]: Finished difference Result 373 states and 556 transitions. [2021-12-17 14:53:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 14:53:23,413 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 [2021-12-17 14:53:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:23,430 INFO L225 Difference]: With dead ends: 373 [2021-12-17 14:53:23,430 INFO L226 Difference]: Without dead ends: 254 [2021-12-17 14:53:23,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:53:23,439 INFO L933 BasicCegarLoop]: 393 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, 393 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 [2021-12-17 14:53:23,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:53:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-17 14:53:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-12-17 14:53:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 199 states have (on average 1.5477386934673367) internal successors, (308), 202 states have internal predecessors, (308), 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) [2021-12-17 14:53:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 385 transitions. [2021-12-17 14:53:23,510 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 385 transitions. Word has length 86 [2021-12-17 14:53:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:23,512 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 385 transitions. [2021-12-17 14:53:23,512 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) [2021-12-17 14:53:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 385 transitions. [2021-12-17 14:53:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 14:53:23,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:23,520 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] [2021-12-17 14:53:23,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 14:53:23,735 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 [2021-12-17 14:53:23,736 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 434501306, now seen corresponding path program 1 times [2021-12-17 14:53:23,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115157883] [2021-12-17 14:53:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:23,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:53:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:53:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:53:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 14:53:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:53:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:53:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 14:53:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 14:53:23,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:23,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115157883] [2021-12-17 14:53:23,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115157883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:53:23,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596160579] [2021-12-17 14:53:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:23,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:53:23,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:53:23,884 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) [2021-12-17 14:53:23,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:53:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:53:24,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:53:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 14:53:24,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:53:24,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596160579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:24,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:53:24,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-17 14:53:24,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655930833] [2021-12-17 14:53:24,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:24,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:53:24,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:53:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:53:24,191 INFO L87 Difference]: Start difference. First operand 254 states and 385 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) [2021-12-17 14:53:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:24,212 INFO L93 Difference]: Finished difference Result 363 states and 537 transitions. [2021-12-17 14:53:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:53:24,213 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 [2021-12-17 14:53:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:24,215 INFO L225 Difference]: With dead ends: 363 [2021-12-17 14:53:24,215 INFO L226 Difference]: Without dead ends: 257 [2021-12-17 14:53:24,224 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 [2021-12-17 14:53:24,225 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 1 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 764 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 [2021-12-17 14:53:24,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 764 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:53:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-17 14:53:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-12-17 14:53:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 201 states have (on average 1.5422885572139304) internal successors, (310), 204 states have internal predecessors, (310), 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) [2021-12-17 14:53:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 387 transitions. [2021-12-17 14:53:24,237 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 387 transitions. Word has length 87 [2021-12-17 14:53:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:24,237 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 387 transitions. [2021-12-17 14:53:24,238 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) [2021-12-17 14:53:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 387 transitions. [2021-12-17 14:53:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 14:53:24,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:24,240 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] [2021-12-17 14:53:24,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 14:53:24,458 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 [2021-12-17 14:53:24,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2121837743, now seen corresponding path program 1 times [2021-12-17 14:53:24,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:24,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18596813] [2021-12-17 14:53:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:24,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:53:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:53:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:53:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 14:53:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:53:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 14:53:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:53:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:53:24,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18596813] [2021-12-17 14:53:24,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18596813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:53:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997547233] [2021-12-17 14:53:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:24,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:53:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:53:24,563 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) [2021-12-17 14:53:24,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:53:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:53:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:53:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 14:53:24,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:53:24,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997547233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:24,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:53:24,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-17 14:53:24,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386361927] [2021-12-17 14:53:24,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:24,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:53:24,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:53:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:53:24,958 INFO L87 Difference]: Start difference. First operand 256 states and 387 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) [2021-12-17 14:53:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:24,981 INFO L93 Difference]: Finished difference Result 537 states and 825 transitions. [2021-12-17 14:53:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:53:24,982 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 [2021-12-17 14:53:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:24,985 INFO L225 Difference]: With dead ends: 537 [2021-12-17 14:53:24,985 INFO L226 Difference]: Without dead ends: 308 [2021-12-17 14:53:24,986 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 [2021-12-17 14:53:24,987 INFO L933 BasicCegarLoop]: 409 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, 748 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 [2021-12-17 14:53:24,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 748 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:53:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-17 14:53:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 300. [2021-12-17 14:53:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 234 states have (on average 1.5555555555555556) internal successors, (364), 237 states have internal predecessors, (364), 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) [2021-12-17 14:53:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 463 transitions. [2021-12-17 14:53:25,002 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 463 transitions. Word has length 93 [2021-12-17 14:53:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:25,003 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 463 transitions. [2021-12-17 14:53:25,003 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) [2021-12-17 14:53:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 463 transitions. [2021-12-17 14:53:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-17 14:53:25,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:25,006 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] [2021-12-17 14:53:25,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 14:53:25,223 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 [2021-12-17 14:53:25,224 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2132692778, now seen corresponding path program 1 times [2021-12-17 14:53:25,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:25,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738287397] [2021-12-17 14:53:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:25,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:53:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:53:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:53:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 14:53:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 14:53:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 14:53:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 14:53:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:53:25,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738287397] [2021-12-17 14:53:25,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738287397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:53:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739940234] [2021-12-17 14:53:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:25,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:53:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:53:25,352 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) [2021-12-17 14:53:25,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:53:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 14:53:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:53:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:53:25,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:53:25,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739940234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:25,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:53:25,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-17 14:53:25,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842035376] [2021-12-17 14:53:25,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:25,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:53:25,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:53:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:53:25,691 INFO L87 Difference]: Start difference. First operand 300 states and 463 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) [2021-12-17 14:53:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:25,731 INFO L93 Difference]: Finished difference Result 591 states and 916 transitions. [2021-12-17 14:53:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:53:25,731 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 [2021-12-17 14:53:25,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:25,733 INFO L225 Difference]: With dead ends: 591 [2021-12-17 14:53:25,733 INFO L226 Difference]: Without dead ends: 302 [2021-12-17 14:53:25,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:53:25,734 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 117 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1368 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 [2021-12-17 14:53:25,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1368 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:53:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-17 14:53:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2021-12-17 14:53:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 235 states have (on average 1.553191489361702) internal successors, (365), 239 states have internal predecessors, (365), 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) [2021-12-17 14:53:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 466 transitions. [2021-12-17 14:53:25,761 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 466 transitions. Word has length 94 [2021-12-17 14:53:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:25,761 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 466 transitions. [2021-12-17 14:53:25,762 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) [2021-12-17 14:53:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 466 transitions. [2021-12-17 14:53:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 14:53:25,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:25,763 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] [2021-12-17 14:53:25,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 14:53:25,985 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 [2021-12-17 14:53:25,986 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:25,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1205446056, now seen corresponding path program 1 times [2021-12-17 14:53:25,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:25,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357115665] [2021-12-17 14:53:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:25,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 14:53:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:53:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:53:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:53:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 14:53:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 14:53:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:53:26,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:26,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357115665] [2021-12-17 14:53:26,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357115665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:53:26,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303869006] [2021-12-17 14:53:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:26,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:53:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:53:26,082 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) [2021-12-17 14:53:26,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 14:53:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 14:53:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:53:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:53:26,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:53:26,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303869006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:26,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:53:26,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-12-17 14:53:26,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338625955] [2021-12-17 14:53:26,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:26,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:53:26,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:53:26,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:53:26,446 INFO L87 Difference]: Start difference. First operand 302 states and 466 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) [2021-12-17 14:53:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:26,510 INFO L93 Difference]: Finished difference Result 593 states and 921 transitions. [2021-12-17 14:53:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:53:26,510 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 [2021-12-17 14:53:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:26,512 INFO L225 Difference]: With dead ends: 593 [2021-12-17 14:53:26,512 INFO L226 Difference]: Without dead ends: 304 [2021-12-17 14:53:26,513 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 [2021-12-17 14:53:26,514 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 116 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1357 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 [2021-12-17 14:53:26,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1357 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:53:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-17 14:53:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-12-17 14:53:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 236 states have (on average 1.5508474576271187) internal successors, (366), 241 states have internal predecessors, (366), 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) [2021-12-17 14:53:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 472 transitions. [2021-12-17 14:53:26,539 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 472 transitions. Word has length 95 [2021-12-17 14:53:26,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:26,539 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 472 transitions. [2021-12-17 14:53:26,539 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) [2021-12-17 14:53:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 472 transitions. [2021-12-17 14:53:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 14:53:26,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:26,541 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] [2021-12-17 14:53:26,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 14:53:26,751 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 [2021-12-17 14:53:26,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 658475617, now seen corresponding path program 1 times [2021-12-17 14:53:26,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780151637] [2021-12-17 14:53:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:26,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 14:53:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:53:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:53:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 14:53:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 14:53:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:53:26,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:26,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780151637] [2021-12-17 14:53:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780151637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:26,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:26,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 14:53:26,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766094788] [2021-12-17 14:53:26,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:26,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:53:26,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:53:26,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:53:26,872 INFO L87 Difference]: Start difference. First operand 304 states and 472 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) [2021-12-17 14:53:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:27,637 INFO L93 Difference]: Finished difference Result 637 states and 995 transitions. [2021-12-17 14:53:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:53:27,638 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 [2021-12-17 14:53:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:27,639 INFO L225 Difference]: With dead ends: 637 [2021-12-17 14:53:27,639 INFO L226 Difference]: Without dead ends: 356 [2021-12-17 14:53:27,640 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 [2021-12-17 14:53:27,641 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 673 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:27,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 1201 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:53:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-17 14:53:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 304. [2021-12-17 14:53:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 236 states have (on average 1.5508474576271187) internal successors, (366), 241 states have internal predecessors, (366), 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) [2021-12-17 14:53:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 471 transitions. [2021-12-17 14:53:27,660 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 471 transitions. Word has length 96 [2021-12-17 14:53:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:27,660 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 471 transitions. [2021-12-17 14:53:27,660 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) [2021-12-17 14:53:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 471 transitions. [2021-12-17 14:53:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 14:53:27,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:27,662 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] [2021-12-17 14:53:27,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 14:53:27,662 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1219216955, now seen corresponding path program 2 times [2021-12-17 14:53:27,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:27,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580684349] [2021-12-17 14:53:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:27,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:53:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 14:53:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:53:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:53:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 14:53:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:53:27,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580684349] [2021-12-17 14:53:27,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580684349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:27,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:27,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 14:53:27,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901204293] [2021-12-17 14:53:27,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:27,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:53:27,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:27,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:53:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:53:27,741 INFO L87 Difference]: Start difference. First operand 304 states and 471 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) [2021-12-17 14:53:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:28,469 INFO L93 Difference]: Finished difference Result 639 states and 998 transitions. [2021-12-17 14:53:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:53:28,470 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 [2021-12-17 14:53:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:28,472 INFO L225 Difference]: With dead ends: 639 [2021-12-17 14:53:28,472 INFO L226 Difference]: Without dead ends: 358 [2021-12-17 14:53:28,473 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 [2021-12-17 14:53:28,473 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 669 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:28,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1202 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:53:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-17 14:53:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 306. [2021-12-17 14:53:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 237 states have (on average 1.5485232067510548) internal successors, (367), 243 states have internal predecessors, (367), 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) [2021-12-17 14:53:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 474 transitions. [2021-12-17 14:53:28,499 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 474 transitions. Word has length 97 [2021-12-17 14:53:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:28,500 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 474 transitions. [2021-12-17 14:53:28,500 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) [2021-12-17 14:53:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 474 transitions. [2021-12-17 14:53:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 14:53:28,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:28,501 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] [2021-12-17 14:53:28,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 14:53:28,502 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 252552444, now seen corresponding path program 1 times [2021-12-17 14:53:28,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:28,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291777136] [2021-12-17 14:53:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:28,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:53:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:53:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 14:53:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 14:53:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:53:28,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:28,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291777136] [2021-12-17 14:53:28,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291777136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:28,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:28,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 14:53:28,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027198951] [2021-12-17 14:53:28,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:28,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 14:53:28,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 14:53:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:53:28,646 INFO L87 Difference]: Start difference. First operand 306 states and 474 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) [2021-12-17 14:53:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:29,659 INFO L93 Difference]: Finished difference Result 637 states and 993 transitions. [2021-12-17 14:53:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:53:29,660 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 [2021-12-17 14:53:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:29,662 INFO L225 Difference]: With dead ends: 637 [2021-12-17 14:53:29,662 INFO L226 Difference]: Without dead ends: 358 [2021-12-17 14:53:29,663 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 [2021-12-17 14:53:29,663 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 775 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:29,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 1572 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 14:53:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-17 14:53:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 306. [2021-12-17 14:53:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 237 states have (on average 1.5485232067510548) internal successors, (367), 243 states have internal predecessors, (367), 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) [2021-12-17 14:53:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 473 transitions. [2021-12-17 14:53:29,677 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 473 transitions. Word has length 98 [2021-12-17 14:53:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:29,677 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 473 transitions. [2021-12-17 14:53:29,677 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) [2021-12-17 14:53:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 473 transitions. [2021-12-17 14:53:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 14:53:29,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:29,679 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] [2021-12-17 14:53:29,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 14:53:29,679 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash -320628967, now seen corresponding path program 2 times [2021-12-17 14:53:29,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:29,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521832775] [2021-12-17 14:53:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:29,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 14:53:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:53:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:53:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:53:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:53:29,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:29,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521832775] [2021-12-17 14:53:29,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521832775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:29,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:29,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 14:53:29,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709688474] [2021-12-17 14:53:29,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:29,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 14:53:29,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 14:53:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:53:29,777 INFO L87 Difference]: Start difference. First operand 306 states and 473 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) [2021-12-17 14:53:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:30,795 INFO L93 Difference]: Finished difference Result 639 states and 999 transitions. [2021-12-17 14:53:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:53:30,796 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 [2021-12-17 14:53:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:30,797 INFO L225 Difference]: With dead ends: 639 [2021-12-17 14:53:30,798 INFO L226 Difference]: Without dead ends: 360 [2021-12-17 14:53:30,799 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 [2021-12-17 14:53:30,799 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 771 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:30,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1573 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 14:53:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-17 14:53:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 308. [2021-12-17 14:53:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 238 states have (on average 1.546218487394958) internal successors, (368), 245 states have internal predecessors, (368), 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) [2021-12-17 14:53:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 479 transitions. [2021-12-17 14:53:30,831 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 479 transitions. Word has length 99 [2021-12-17 14:53:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:30,832 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 479 transitions. [2021-12-17 14:53:30,832 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) [2021-12-17 14:53:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 479 transitions. [2021-12-17 14:53:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-17 14:53:30,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:30,834 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] [2021-12-17 14:53:30,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 14:53:30,834 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash -807696649, now seen corresponding path program 1 times [2021-12-17 14:53:30,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:30,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15283875] [2021-12-17 14:53:30,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:30,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:53:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:53:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:53:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 14:53:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:30,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15283875] [2021-12-17 14:53:30,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15283875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:53:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551568950] [2021-12-17 14:53:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:30,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:53:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:53:30,924 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) [2021-12-17 14:53:30,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 14:53:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:53:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:53:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:31,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:53:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:31,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551568950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:53:31,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:53:31,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-12-17 14:53:31,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487165803] [2021-12-17 14:53:31,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:53:31,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:53:31,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:53:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:53:31,367 INFO L87 Difference]: Start difference. First operand 308 states and 479 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) [2021-12-17 14:53:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:32,201 INFO L93 Difference]: Finished difference Result 793 states and 1297 transitions. [2021-12-17 14:53:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 14:53:32,202 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 [2021-12-17 14:53:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:32,205 INFO L225 Difference]: With dead ends: 793 [2021-12-17 14:53:32,205 INFO L226 Difference]: Without dead ends: 687 [2021-12-17 14:53:32,206 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 [2021-12-17 14:53:32,207 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 1033 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:32,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 1551 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:53:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-12-17 14:53:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 611. [2021-12-17 14:53:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 477 states have (on average 1.6058700209643606) internal successors, (766), 484 states have internal predecessors, (766), 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) [2021-12-17 14:53:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1015 transitions. [2021-12-17 14:53:32,229 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1015 transitions. Word has length 100 [2021-12-17 14:53:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:32,230 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1015 transitions. [2021-12-17 14:53:32,230 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) [2021-12-17 14:53:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1015 transitions. [2021-12-17 14:53:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 14:53:32,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:32,232 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] [2021-12-17 14:53:32,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 14:53:32,450 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 [2021-12-17 14:53:32,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash -699793798, now seen corresponding path program 1 times [2021-12-17 14:53:32,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:32,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423211459] [2021-12-17 14:53:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:32,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:53:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 14:53:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:53:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 14:53:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:32,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423211459] [2021-12-17 14:53:32,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423211459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:32,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:32,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:32,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654513604] [2021-12-17 14:53:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:32,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:32,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:32,547 INFO L87 Difference]: Start difference. First operand 611 states and 1015 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) [2021-12-17 14:53:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:33,124 INFO L93 Difference]: Finished difference Result 1514 states and 2576 transitions. [2021-12-17 14:53:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:33,124 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 [2021-12-17 14:53:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:33,129 INFO L225 Difference]: With dead ends: 1514 [2021-12-17 14:53:33,129 INFO L226 Difference]: Without dead ends: 971 [2021-12-17 14:53:33,131 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 [2021-12-17 14:53:33,132 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 662 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:33,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 1013 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 14:53:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-12-17 14:53:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 911. [2021-12-17 14:53:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 713 states have (on average 1.614305750350631) internal successors, (1151), 720 states have internal predecessors, (1151), 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) [2021-12-17 14:53:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1538 transitions. [2021-12-17 14:53:33,178 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1538 transitions. Word has length 106 [2021-12-17 14:53:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:33,179 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1538 transitions. [2021-12-17 14:53:33,179 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) [2021-12-17 14:53:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1538 transitions. [2021-12-17 14:53:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 14:53:33,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:33,182 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] [2021-12-17 14:53:33,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 14:53:33,183 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:33,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1925218256, now seen corresponding path program 1 times [2021-12-17 14:53:33,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:33,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813514921] [2021-12-17 14:53:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:33,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:53:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 14:53:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 14:53:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 14:53:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:33,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:33,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813514921] [2021-12-17 14:53:33,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813514921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:33,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:33,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:33,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131538427] [2021-12-17 14:53:33,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:33,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:33,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:33,263 INFO L87 Difference]: Start difference. First operand 911 states and 1538 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) [2021-12-17 14:53:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:33,867 INFO L93 Difference]: Finished difference Result 2229 states and 3821 transitions. [2021-12-17 14:53:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:33,868 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 [2021-12-17 14:53:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:33,874 INFO L225 Difference]: With dead ends: 2229 [2021-12-17 14:53:33,874 INFO L226 Difference]: Without dead ends: 1439 [2021-12-17 14:53:33,877 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 [2021-12-17 14:53:33,878 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 660 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:33,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 985 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 14:53:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-12-17 14:53:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1379. [2021-12-17 14:53:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1086 states have (on average 1.6187845303867403) internal successors, (1758), 1093 states have internal predecessors, (1758), 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) [2021-12-17 14:53:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2335 transitions. [2021-12-17 14:53:33,929 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2335 transitions. Word has length 107 [2021-12-17 14:53:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:33,930 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 2335 transitions. [2021-12-17 14:53:33,930 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) [2021-12-17 14:53:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2335 transitions. [2021-12-17 14:53:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 14:53:33,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:33,935 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] [2021-12-17 14:53:33,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 14:53:33,936 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1161467032, now seen corresponding path program 1 times [2021-12-17 14:53:33,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370469797] [2021-12-17 14:53:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:33,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:33,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:53:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 14:53:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 14:53:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 14:53:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:34,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:34,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370469797] [2021-12-17 14:53:34,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370469797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:34,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:34,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:34,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207425901] [2021-12-17 14:53:34,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:34,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:34,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:34,014 INFO L87 Difference]: Start difference. First operand 1379 states and 2335 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) [2021-12-17 14:53:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:34,638 INFO L93 Difference]: Finished difference Result 3276 states and 5662 transitions. [2021-12-17 14:53:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:34,638 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 [2021-12-17 14:53:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:34,653 INFO L225 Difference]: With dead ends: 3276 [2021-12-17 14:53:34,653 INFO L226 Difference]: Without dead ends: 2143 [2021-12-17 14:53:34,658 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 [2021-12-17 14:53:34,659 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 658 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:34,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 985 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 14:53:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-12-17 14:53:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2083. [2021-12-17 14:53:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 1667 states have (on average 1.6226754649070185) internal successors, (2705), 1674 states have internal predecessors, (2705), 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) [2021-12-17 14:53:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3544 transitions. [2021-12-17 14:53:34,741 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3544 transitions. Word has length 108 [2021-12-17 14:53:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:34,742 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 3544 transitions. [2021-12-17 14:53:34,742 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) [2021-12-17 14:53:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3544 transitions. [2021-12-17 14:53:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 14:53:34,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:34,747 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] [2021-12-17 14:53:34,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 14:53:34,748 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1105028913, now seen corresponding path program 1 times [2021-12-17 14:53:34,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:34,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574987948] [2021-12-17 14:53:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:34,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:53:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 14:53:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 14:53:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:53:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:34,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:34,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574987948] [2021-12-17 14:53:34,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574987948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:34,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:34,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:34,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984259935] [2021-12-17 14:53:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:34,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:34,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:34,807 INFO L87 Difference]: Start difference. First operand 2083 states and 3544 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) [2021-12-17 14:53:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:35,517 INFO L93 Difference]: Finished difference Result 4895 states and 8516 transitions. [2021-12-17 14:53:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:35,517 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 [2021-12-17 14:53:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:35,532 INFO L225 Difference]: With dead ends: 4895 [2021-12-17 14:53:35,532 INFO L226 Difference]: Without dead ends: 3262 [2021-12-17 14:53:35,537 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 [2021-12-17 14:53:35,538 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 656 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:35,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 985 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:53:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-12-17 14:53:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 3202. [2021-12-17 14:53:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 2607 states have (on average 1.624856156501726) internal successors, (4236), 2614 states have internal predecessors, (4236), 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) [2021-12-17 14:53:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 5459 transitions. [2021-12-17 14:53:35,693 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 5459 transitions. Word has length 109 [2021-12-17 14:53:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:35,693 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 5459 transitions. [2021-12-17 14:53:35,694 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) [2021-12-17 14:53:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 5459 transitions. [2021-12-17 14:53:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 14:53:35,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:35,701 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] [2021-12-17 14:53:35,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 14:53:35,702 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1327662884, now seen corresponding path program 1 times [2021-12-17 14:53:35,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:35,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895455993] [2021-12-17 14:53:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:35,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:53:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:53:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 14:53:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 14:53:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:35,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895455993] [2021-12-17 14:53:35,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895455993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:35,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:35,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:35,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838784747] [2021-12-17 14:53:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:35,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:35,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:35,766 INFO L87 Difference]: Start difference. First operand 3202 states and 5459 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) [2021-12-17 14:53:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:36,552 INFO L93 Difference]: Finished difference Result 7813 states and 13615 transitions. [2021-12-17 14:53:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:36,553 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 [2021-12-17 14:53:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:36,574 INFO L225 Difference]: With dead ends: 7813 [2021-12-17 14:53:36,574 INFO L226 Difference]: Without dead ends: 5293 [2021-12-17 14:53:36,581 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 [2021-12-17 14:53:36,582 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 654 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:36,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1023 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:53:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-12-17 14:53:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 5233. [2021-12-17 14:53:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 4262 states have (on average 1.616142656030033) internal successors, (6888), 4269 states have internal predecessors, (6888), 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) [2021-12-17 14:53:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 8907 transitions. [2021-12-17 14:53:36,909 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 8907 transitions. Word has length 110 [2021-12-17 14:53:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:36,909 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 8907 transitions. [2021-12-17 14:53:36,910 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) [2021-12-17 14:53:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 8907 transitions. [2021-12-17 14:53:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 14:53:36,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:36,919 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] [2021-12-17 14:53:36,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 14:53:36,919 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1675034485, now seen corresponding path program 1 times [2021-12-17 14:53:36,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87810397] [2021-12-17 14:53:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:36,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:53:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 14:53:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 14:53:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 14:53:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:36,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:36,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87810397] [2021-12-17 14:53:36,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87810397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:36,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:36,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:36,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646824149] [2021-12-17 14:53:36,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:36,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:36,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:36,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:36,988 INFO L87 Difference]: Start difference. First operand 5233 states and 8907 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) [2021-12-17 14:53:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:37,791 INFO L93 Difference]: Finished difference Result 12955 states and 22524 transitions. [2021-12-17 14:53:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:37,792 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 [2021-12-17 14:53:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:37,846 INFO L225 Difference]: With dead ends: 12955 [2021-12-17 14:53:37,846 INFO L226 Difference]: Without dead ends: 8781 [2021-12-17 14:53:37,862 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 [2021-12-17 14:53:37,863 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 652 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:37,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 984 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 14:53:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8781 states. [2021-12-17 14:53:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8781 to 8721. [2021-12-17 14:53:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8721 states, 7144 states have (on average 1.6128219484882418) internal successors, (11522), 7151 states have internal predecessors, (11522), 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) [2021-12-17 14:53:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8721 states to 8721 states and 14831 transitions. [2021-12-17 14:53:38,298 INFO L78 Accepts]: Start accepts. Automaton has 8721 states and 14831 transitions. Word has length 111 [2021-12-17 14:53:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:38,298 INFO L470 AbstractCegarLoop]: Abstraction has 8721 states and 14831 transitions. [2021-12-17 14:53:38,299 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) [2021-12-17 14:53:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8721 states and 14831 transitions. [2021-12-17 14:53:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:53:38,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:38,310 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] [2021-12-17 14:53:38,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 14:53:38,311 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1253521690, now seen corresponding path program 1 times [2021-12-17 14:53:38,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:38,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289289346] [2021-12-17 14:53:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:38,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:53:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:53:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 14:53:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 14:53:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:38,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:38,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289289346] [2021-12-17 14:53:38,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289289346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:38,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:38,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:38,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89785667] [2021-12-17 14:53:38,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:38,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:38,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:38,387 INFO L87 Difference]: Start difference. First operand 8721 states and 14831 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) [2021-12-17 14:53:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:39,381 INFO L93 Difference]: Finished difference Result 22614 states and 39230 transitions. [2021-12-17 14:53:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:39,382 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 [2021-12-17 14:53:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:39,424 INFO L225 Difference]: With dead ends: 22614 [2021-12-17 14:53:39,425 INFO L226 Difference]: Without dead ends: 15374 [2021-12-17 14:53:39,447 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 [2021-12-17 14:53:39,448 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 650 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:39,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1041 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 14:53:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15374 states. [2021-12-17 14:53:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15374 to 15314. [2021-12-17 14:53:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15314 states, 12534 states have (on average 1.6026807084729535) internal successors, (20088), 12541 states have internal predecessors, (20088), 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) [2021-12-17 14:53:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15314 states to 15314 states and 25947 transitions. [2021-12-17 14:53:40,130 INFO L78 Accepts]: Start accepts. Automaton has 15314 states and 25947 transitions. Word has length 112 [2021-12-17 14:53:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:40,130 INFO L470 AbstractCegarLoop]: Abstraction has 15314 states and 25947 transitions. [2021-12-17 14:53:40,130 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) [2021-12-17 14:53:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 15314 states and 25947 transitions. [2021-12-17 14:53:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 14:53:40,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:40,147 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] [2021-12-17 14:53:40,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 14:53:40,147 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -208311830, now seen corresponding path program 1 times [2021-12-17 14:53:40,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:40,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914495355] [2021-12-17 14:53:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:40,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:53:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:53:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 14:53:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 14:53:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:40,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:40,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914495355] [2021-12-17 14:53:40,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914495355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:40,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:40,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:40,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439246235] [2021-12-17 14:53:40,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:40,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:40,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:40,214 INFO L87 Difference]: Start difference. First operand 15314 states and 25947 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) [2021-12-17 14:53:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:41,663 INFO L93 Difference]: Finished difference Result 40570 states and 70213 transitions. [2021-12-17 14:53:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:41,664 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 [2021-12-17 14:53:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:41,763 INFO L225 Difference]: With dead ends: 40570 [2021-12-17 14:53:41,764 INFO L226 Difference]: Without dead ends: 27344 [2021-12-17 14:53:41,805 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 [2021-12-17 14:53:41,806 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 648 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:41,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 990 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 14:53:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27344 states. [2021-12-17 14:53:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27344 to 27284. [2021-12-17 14:53:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27284 states, 22465 states have (on average 1.5978633429779656) internal successors, (35896), 22472 states have internal predecessors, (35896), 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) [2021-12-17 14:53:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27284 states to 27284 states and 46107 transitions. [2021-12-17 14:53:42,960 INFO L78 Accepts]: Start accepts. Automaton has 27284 states and 46107 transitions. Word has length 113 [2021-12-17 14:53:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:42,960 INFO L470 AbstractCegarLoop]: Abstraction has 27284 states and 46107 transitions. [2021-12-17 14:53:42,961 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) [2021-12-17 14:53:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27284 states and 46107 transitions. [2021-12-17 14:53:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 14:53:42,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:42,978 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] [2021-12-17 14:53:42,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 14:53:42,978 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1420893432, now seen corresponding path program 1 times [2021-12-17 14:53:42,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:42,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121321113] [2021-12-17 14:53:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:42,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 14:53:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 14:53:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 14:53:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 14:53:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:43,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121321113] [2021-12-17 14:53:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121321113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:43,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:43,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:43,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730641726] [2021-12-17 14:53:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:43,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:43,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:43,043 INFO L87 Difference]: Start difference. First operand 27284 states and 46107 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) [2021-12-17 14:53:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:45,154 INFO L93 Difference]: Finished difference Result 74357 states and 127812 transitions. [2021-12-17 14:53:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:45,155 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 [2021-12-17 14:53:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:45,369 INFO L225 Difference]: With dead ends: 74357 [2021-12-17 14:53:45,369 INFO L226 Difference]: Without dead ends: 49893 [2021-12-17 14:53:45,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:53:45,448 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 646 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:45,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 988 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:53:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49893 states. [2021-12-17 14:53:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49893 to 49833. [2021-12-17 14:53:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49833 states, 41299 states have (on average 1.5917334560158842) internal successors, (65737), 41306 states have internal predecessors, (65737), 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) [2021-12-17 14:53:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49833 states to 49833 states and 83910 transitions. [2021-12-17 14:53:47,661 INFO L78 Accepts]: Start accepts. Automaton has 49833 states and 83910 transitions. Word has length 114 [2021-12-17 14:53:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:47,662 INFO L470 AbstractCegarLoop]: Abstraction has 49833 states and 83910 transitions. [2021-12-17 14:53:47,662 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) [2021-12-17 14:53:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 49833 states and 83910 transitions. [2021-12-17 14:53:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 14:53:47,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:47,685 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] [2021-12-17 14:53:47,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 14:53:47,686 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1196910922, now seen corresponding path program 1 times [2021-12-17 14:53:47,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:47,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539800259] [2021-12-17 14:53:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:47,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:53:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 14:53:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 14:53:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 14:53:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:47,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:47,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539800259] [2021-12-17 14:53:47,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539800259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:47,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:47,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 14:53:47,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207974168] [2021-12-17 14:53:47,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:47,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 14:53:47,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 14:53:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:53:47,759 INFO L87 Difference]: Start difference. First operand 49833 states and 83910 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) [2021-12-17 14:53:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:53:50,975 INFO L93 Difference]: Finished difference Result 92843 states and 159943 transitions. [2021-12-17 14:53:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:53:50,976 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 [2021-12-17 14:53:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:53:51,315 INFO L225 Difference]: With dead ends: 92843 [2021-12-17 14:53:51,315 INFO L226 Difference]: Without dead ends: 92737 [2021-12-17 14:53:51,360 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 [2021-12-17 14:53:51,361 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 644 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:53:51,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 984 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 14:53:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92737 states. [2021-12-17 14:53:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92737 to 92677. [2021-12-17 14:53:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92677 states, 77344 states have (on average 1.584130637153496) internal successors, (122523), 77351 states have internal predecessors, (122523), 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) [2021-12-17 14:53:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92677 states to 92677 states and 155340 transitions. [2021-12-17 14:53:55,380 INFO L78 Accepts]: Start accepts. Automaton has 92677 states and 155340 transitions. Word has length 115 [2021-12-17 14:53:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:53:55,381 INFO L470 AbstractCegarLoop]: Abstraction has 92677 states and 155340 transitions. [2021-12-17 14:53:55,381 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) [2021-12-17 14:53:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 92677 states and 155340 transitions. [2021-12-17 14:53:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 14:53:55,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:53:55,401 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] [2021-12-17 14:53:55,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 14:53:55,401 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:53:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:53:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash -216688615, now seen corresponding path program 1 times [2021-12-17 14:53:55,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:53:55,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206421707] [2021-12-17 14:53:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:53:55,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:53:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:53:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:53:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:53:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:53:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:53:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:53:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 14:53:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 14:53:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:53:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-17 14:53:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:53:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:53:55,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:53:55,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206421707] [2021-12-17 14:53:55,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206421707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:53:55,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:53:55,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 14:53:55,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337076038] [2021-12-17 14:53:55,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:53:55,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 14:53:55,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:53:55,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 14:53:55,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:53:55,583 INFO L87 Difference]: Start difference. First operand 92677 states and 155340 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) [2021-12-17 14:54:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:54:03,801 INFO L93 Difference]: Finished difference Result 184895 states and 321875 transitions. [2021-12-17 14:54:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 14:54:03,811 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 [2021-12-17 14:54:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:54:04,577 INFO L225 Difference]: With dead ends: 184895 [2021-12-17 14:54:04,578 INFO L226 Difference]: Without dead ends: 184797 [2021-12-17 14:54:04,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 14:54:04,661 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 2486 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 3893 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 4714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 3893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:54:04,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2497 Valid, 2364 Invalid, 4714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 3893 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 14:54:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184797 states.