./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/email_spec6_product22.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_spec6_product22.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 e61661fc2d58041f16237a6d2ff2f3d5f72c7660b85c9fdf3f096a51b709ec23 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:00:17,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:00:17,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:00:17,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:00:17,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:00:17,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:00:17,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:00:17,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:00:17,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:00:17,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:00:17,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:00:17,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:00:17,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:00:17,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:00:17,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:00:17,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:00:17,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:00:17,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:00:17,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:00:17,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:00:17,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:00:17,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:00:17,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:00:17,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:00:17,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:00:17,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:00:17,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:00:17,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:00:17,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:00:17,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:00:17,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:00:17,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:00:17,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:00:17,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:00:17,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:00:17,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:00:17,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:00:17,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:00:17,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:00:17,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:00:17,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:00:17,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:00:17,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:00:17,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:00:17,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:00:17,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:00:17,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:00:17,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:00:17,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:00:17,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:00:17,209 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:00:17,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:00:17,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:00:17,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:00:17,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:00:17,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:00:17,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:00:17,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:00:17,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:00:17,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:00:17,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:00:17,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:00:17,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:00:17,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:00:17,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:00:17,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:00:17,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:00:17,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:00:17,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:00:17,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:00:17,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:00:17,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:00:17,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:00:17,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:00:17,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:00:17,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:00:17,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61661fc2d58041f16237a6d2ff2f3d5f72c7660b85c9fdf3f096a51b709ec23 [2021-12-17 15:00:17,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:00:17,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:00:17,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:00:17,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:00:17,451 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:00:17,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec6_product22.cil.c [2021-12-17 15:00:17,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b9619f1/260600d5b2b545afa341ace06ac2cb36/FLAGc9e6d65bc [2021-12-17 15:00:18,001 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:00:18,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec6_product22.cil.c [2021-12-17 15:00:18,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b9619f1/260600d5b2b545afa341ace06ac2cb36/FLAGc9e6d65bc [2021-12-17 15:00:18,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b9619f1/260600d5b2b545afa341ace06ac2cb36 [2021-12-17 15:00:18,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:00:18,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:00:18,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:00:18,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:00:18,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:00:18,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:00:18" (1/1) ... [2021-12-17 15:00:18,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae53cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:18, skipping insertion in model container [2021-12-17 15:00:18,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:00:18" (1/1) ... [2021-12-17 15:00:18,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:00:18,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:00:18,738 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_spec6_product22.cil.c[21483,21496] [2021-12-17 15:00:18,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:00:18,885 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:00:18,946 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_spec6_product22.cil.c[21483,21496] [2021-12-17 15:00:19,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:00:19,034 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:00:19,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19 WrapperNode [2021-12-17 15:00:19,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:00:19,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:00:19,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:00:19,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:00:19,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,148 INFO L137 Inliner]: procedures = 129, calls = 213, calls flagged for inlining = 58, calls inlined = 53, statements flattened = 1006 [2021-12-17 15:00:19,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:00:19,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:00:19,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:00:19,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:00:19,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:00:19,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:00:19,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:00:19,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:00:19,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (1/1) ... [2021-12-17 15:00:19,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:00:19,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:00:19,288 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 15:00:19,310 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 15:00:19,331 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-12-17 15:00:19,332 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-12-17 15:00:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-12-17 15:00:19,332 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-12-17 15:00:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-12-17 15:00:19,332 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-12-17 15:00:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-17 15:00:19,333 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-17 15:00:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-17 15:00:19,333 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-17 15:00:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-12-17 15:00:19,333 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-12-17 15:00:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-12-17 15:00:19,334 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-12-17 15:00:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-12-17 15:00:19,334 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-12-17 15:00:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-17 15:00:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-12-17 15:00:19,336 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-12-17 15:00:19,336 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-12-17 15:00:19,336 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-12-17 15:00:19,336 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-17 15:00:19,336 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-17 15:00:19,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:00:19,336 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-12-17 15:00:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-12-17 15:00:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-12-17 15:00:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-12-17 15:00:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-12-17 15:00:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-12-17 15:00:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-17 15:00:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-17 15:00:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-17 15:00:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-17 15:00:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-12-17 15:00:19,338 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-12-17 15:00:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-12-17 15:00:19,339 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-12-17 15:00:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-12-17 15:00:19,339 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-12-17 15:00:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:00:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-12-17 15:00:19,339 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-12-17 15:00:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:00:19,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:00:19,532 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:00:19,551 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:00:20,256 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:00:20,273 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:00:20,274 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 15:00:20,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:00:20 BoogieIcfgContainer [2021-12-17 15:00:20,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:00:20,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:00:20,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:00:20,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:00:20,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:00:18" (1/3) ... [2021-12-17 15:00:20,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230e9cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:00:20, skipping insertion in model container [2021-12-17 15:00:20,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:00:19" (2/3) ... [2021-12-17 15:00:20,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230e9cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:00:20, skipping insertion in model container [2021-12-17 15:00:20,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:00:20" (3/3) ... [2021-12-17 15:00:20,285 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product22.cil.c [2021-12-17 15:00:20,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:00:20,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:00:20,331 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:00:20,336 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 15:00:20,337 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:00:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 334 states, 258 states have (on average 1.5155038759689923) internal successors, (391), 262 states have internal predecessors, (391), 54 states have call successors, (54), 20 states have call predecessors, (54), 20 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-17 15:00:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 15:00:20,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:20,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:00:20,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash -837891348, now seen corresponding path program 1 times [2021-12-17 15:00:20,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:20,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851652620] [2021-12-17 15:00:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:20,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 15:00:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 15:00:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:00:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:00:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 15:00:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 15:00:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 15:00:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 15:00:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 15:00:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 15:00:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 15:00:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 15:00:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:00:20,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851652620] [2021-12-17 15:00:20,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851652620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:00:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414725298] [2021-12-17 15:00:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:20,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:00:20,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:00:20,874 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 15:00:20,879 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 15:00:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:21,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 15:00:21,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:00:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 15:00:21,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:00:21,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414725298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:21,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:00:21,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2021-12-17 15:00:21,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72813622] [2021-12-17 15:00:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:21,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 15:00:21,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 15:00:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:00:21,567 INFO L87 Difference]: Start difference. First operand has 334 states, 258 states have (on average 1.5155038759689923) internal successors, (391), 262 states have internal predecessors, (391), 54 states have call successors, (54), 20 states have call predecessors, (54), 20 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:21,617 INFO L93 Difference]: Finished difference Result 509 states and 744 transitions. [2021-12-17 15:00:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 15:00:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 114 [2021-12-17 15:00:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:21,632 INFO L225 Difference]: With dead ends: 509 [2021-12-17 15:00:21,632 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 15:00:21,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:00:21,641 INFO L933 BasicCegarLoop]: 495 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, 495 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 15:00:21,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:00:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 15:00:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2021-12-17 15:00:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 252 states have (on average 1.507936507936508) internal successors, (380), 255 states have internal predecessors, (380), 54 states have call successors, (54), 20 states have call predecessors, (54), 20 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-17 15:00:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 487 transitions. [2021-12-17 15:00:21,743 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 487 transitions. Word has length 114 [2021-12-17 15:00:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:21,746 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 487 transitions. [2021-12-17 15:00:21,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 487 transitions. [2021-12-17 15:00:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 15:00:21,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:21,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:00:21,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:00:21,983 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 15:00:21,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:21,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1242856840, now seen corresponding path program 1 times [2021-12-17 15:00:21,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:21,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566340715] [2021-12-17 15:00:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:21,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 15:00:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 15:00:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:00:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 15:00:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 15:00:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 15:00:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 15:00:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 15:00:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 15:00:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 15:00:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 15:00:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 15:00:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:00:22,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:22,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566340715] [2021-12-17 15:00:22,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566340715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:00:22,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402895805] [2021-12-17 15:00:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:22,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:00:22,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:00:22,288 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 15:00:22,375 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 15:00:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:00:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:00:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 15:00:22,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:00:22,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402895805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:22,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:00:22,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-17 15:00:22,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723125941] [2021-12-17 15:00:22,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:22,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:00:22,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:00:22,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 15:00:22,850 INFO L87 Difference]: Start difference. First operand 327 states and 487 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:22,889 INFO L93 Difference]: Finished difference Result 499 states and 725 transitions. [2021-12-17 15:00:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:00:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 115 [2021-12-17 15:00:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:22,898 INFO L225 Difference]: With dead ends: 499 [2021-12-17 15:00:22,900 INFO L226 Difference]: Without dead ends: 330 [2021-12-17 15:00:22,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 15:00:22,906 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 1 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 968 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 15:00:22,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 968 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:00:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-17 15:00:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2021-12-17 15:00:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 254 states have (on average 1.5039370078740157) internal successors, (382), 257 states have internal predecessors, (382), 54 states have call successors, (54), 20 states have call predecessors, (54), 20 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-17 15:00:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 489 transitions. [2021-12-17 15:00:22,936 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 489 transitions. Word has length 115 [2021-12-17 15:00:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:22,937 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 489 transitions. [2021-12-17 15:00:22,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 489 transitions. [2021-12-17 15:00:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-17 15:00:22,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:22,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:22,974 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 15:00:23,159 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 15:00:23,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 961162571, now seen corresponding path program 1 times [2021-12-17 15:00:23,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:23,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544456312] [2021-12-17 15:00:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:23,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 15:00:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 15:00:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:00:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 15:00:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 15:00:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 15:00:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 15:00:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 15:00:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 15:00:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 15:00:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 15:00:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 15:00:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 15:00:23,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544456312] [2021-12-17 15:00:23,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544456312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:00:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190078800] [2021-12-17 15:00:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:23,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:00:23,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:00:23,384 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 15:00:23,409 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 15:00:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:23,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 15:00:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:00:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 15:00:23,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:00:23,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190078800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:23,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:00:23,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-17 15:00:23,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891210976] [2021-12-17 15:00:23,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:23,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:00:23,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:23,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:00:23,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 15:00:23,813 INFO L87 Difference]: Start difference. First operand 329 states and 489 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:23,839 INFO L93 Difference]: Finished difference Result 693 states and 1045 transitions. [2021-12-17 15:00:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:00:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2021-12-17 15:00:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:23,842 INFO L225 Difference]: With dead ends: 693 [2021-12-17 15:00:23,842 INFO L226 Difference]: Without dead ends: 391 [2021-12-17 15:00:23,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 15:00:23,845 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 115 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 947 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 15:00:23,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 947 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:00:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-17 15:00:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 383. [2021-12-17 15:00:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 297 states have (on average 1.5218855218855218) internal successors, (452), 300 states have internal predecessors, (452), 65 states have call successors, (65), 20 states have call predecessors, (65), 20 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-12-17 15:00:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 581 transitions. [2021-12-17 15:00:23,862 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 581 transitions. Word has length 124 [2021-12-17 15:00:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:23,863 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 581 transitions. [2021-12-17 15:00:23,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 581 transitions. [2021-12-17 15:00:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 15:00:23,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:23,866 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:23,892 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 15:00:24,091 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 15:00:24,092 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2046598277, now seen corresponding path program 1 times [2021-12-17 15:00:24,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:24,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996603429] [2021-12-17 15:00:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:24,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 15:00:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 15:00:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:00:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 15:00:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 15:00:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 15:00:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 15:00:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 15:00:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 15:00:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 15:00:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 15:00:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 15:00:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 15:00:24,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996603429] [2021-12-17 15:00:24,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996603429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:00:24,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127169776] [2021-12-17 15:00:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:24,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:00:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:00:24,277 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 15:00:24,284 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 15:00:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:24,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 15:00:24,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:00:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:00:24,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:00:24,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127169776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:24,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:00:24,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-17 15:00:24,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876247893] [2021-12-17 15:00:24,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:24,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:00:24,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:24,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:00:24,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:00:24,763 INFO L87 Difference]: Start difference. First operand 383 states and 581 transitions. Second operand has 5 states, 4 states have (on average 20.75) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:24,828 INFO L93 Difference]: Finished difference Result 757 states and 1152 transitions. [2021-12-17 15:00:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:00:24,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2021-12-17 15:00:24,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:24,832 INFO L225 Difference]: With dead ends: 757 [2021-12-17 15:00:24,832 INFO L226 Difference]: Without dead ends: 385 [2021-12-17 15:00:24,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:24,836 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 133 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1760 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 15:00:24,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1760 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:00:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-17 15:00:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-12-17 15:00:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 298 states have (on average 1.5201342281879195) internal successors, (453), 302 states have internal predecessors, (453), 65 states have call successors, (65), 20 states have call predecessors, (65), 21 states have return successors, (66), 64 states have call predecessors, (66), 64 states have call successors, (66) [2021-12-17 15:00:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 584 transitions. [2021-12-17 15:00:24,859 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 584 transitions. Word has length 125 [2021-12-17 15:00:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:24,859 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 584 transitions. [2021-12-17 15:00:24,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 584 transitions. [2021-12-17 15:00:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 15:00:24,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:24,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:24,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:00:25,079 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 15:00:25,080 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1442355528, now seen corresponding path program 1 times [2021-12-17 15:00:25,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:25,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052376536] [2021-12-17 15:00:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:25,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 15:00:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:00:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 15:00:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:00:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 15:00:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 15:00:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 15:00:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 15:00:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 15:00:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 15:00:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 15:00:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 15:00:25,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:25,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052376536] [2021-12-17 15:00:25,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052376536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:00:25,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782162344] [2021-12-17 15:00:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:25,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:00:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:00:25,264 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 15:00:25,289 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 15:00:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 15:00:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:00:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:00:25,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:00:25,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782162344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:25,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:00:25,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2021-12-17 15:00:25,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240026430] [2021-12-17 15:00:25,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:00:25,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:00:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:00:25,712 INFO L87 Difference]: Start difference. First operand 385 states and 584 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:25,774 INFO L93 Difference]: Finished difference Result 759 states and 1157 transitions. [2021-12-17 15:00:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:00:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 126 [2021-12-17 15:00:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:25,777 INFO L225 Difference]: With dead ends: 759 [2021-12-17 15:00:25,777 INFO L226 Difference]: Without dead ends: 387 [2021-12-17 15:00:25,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:00:25,779 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 132 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1749 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 15:00:25,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1749 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:00:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-17 15:00:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-12-17 15:00:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 299 states have (on average 1.5183946488294315) internal successors, (454), 304 states have internal predecessors, (454), 65 states have call successors, (65), 20 states have call predecessors, (65), 22 states have return successors, (71), 64 states have call predecessors, (71), 64 states have call successors, (71) [2021-12-17 15:00:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 590 transitions. [2021-12-17 15:00:25,795 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 590 transitions. Word has length 126 [2021-12-17 15:00:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:25,796 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 590 transitions. [2021-12-17 15:00:25,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 590 transitions. [2021-12-17 15:00:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 15:00:25,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:25,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:00:25,826 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 15:00:26,019 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 15:00:26,019 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash 133086659, now seen corresponding path program 1 times [2021-12-17 15:00:26,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:26,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047301806] [2021-12-17 15:00:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:26,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 15:00:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 15:00:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 15:00:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 15:00:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 15:00:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 15:00:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 15:00:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 15:00:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 15:00:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 15:00:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 15:00:26,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:26,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047301806] [2021-12-17 15:00:26,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047301806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:26,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:26,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 15:00:26,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446972251] [2021-12-17 15:00:26,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:26,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:00:26,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:00:26,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:00:26,152 INFO L87 Difference]: Start difference. First operand 387 states and 590 transitions. Second operand has 9 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:27,865 INFO L93 Difference]: Finished difference Result 926 states and 1420 transitions. [2021-12-17 15:00:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 15:00:27,866 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 127 [2021-12-17 15:00:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:27,870 INFO L225 Difference]: With dead ends: 926 [2021-12-17 15:00:27,870 INFO L226 Difference]: Without dead ends: 562 [2021-12-17 15:00:27,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:00:27,873 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1145 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:27,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1162 Valid, 1750 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 15:00:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-17 15:00:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 387. [2021-12-17 15:00:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 299 states have (on average 1.5183946488294315) internal successors, (454), 304 states have internal predecessors, (454), 65 states have call successors, (65), 20 states have call predecessors, (65), 22 states have return successors, (70), 64 states have call predecessors, (70), 64 states have call successors, (70) [2021-12-17 15:00:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 589 transitions. [2021-12-17 15:00:27,906 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 589 transitions. Word has length 127 [2021-12-17 15:00:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:27,907 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 589 transitions. [2021-12-17 15:00:27,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 589 transitions. [2021-12-17 15:00:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 15:00:27,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:27,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:00:27,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:00:27,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:27,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1356241106, now seen corresponding path program 2 times [2021-12-17 15:00:27,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386731068] [2021-12-17 15:00:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:27,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:27,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:27,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:27,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 15:00:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 15:00:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 15:00:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 15:00:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 15:00:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 15:00:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 15:00:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-17 15:00:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 15:00:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-17 15:00:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 15:00:28,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:28,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386731068] [2021-12-17 15:00:28,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386731068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:28,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:28,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 15:00:28,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299139770] [2021-12-17 15:00:28,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:28,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:00:28,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:28,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:00:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:00:28,048 INFO L87 Difference]: Start difference. First operand 387 states and 589 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:29,738 INFO L93 Difference]: Finished difference Result 928 states and 1423 transitions. [2021-12-17 15:00:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 15:00:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 128 [2021-12-17 15:00:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:29,743 INFO L225 Difference]: With dead ends: 928 [2021-12-17 15:00:29,743 INFO L226 Difference]: Without dead ends: 564 [2021-12-17 15:00:29,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:00:29,745 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 1140 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:29,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 1751 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 1877 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 15:00:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-17 15:00:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 389. [2021-12-17 15:00:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 300 states have (on average 1.5166666666666666) internal successors, (455), 306 states have internal predecessors, (455), 65 states have call successors, (65), 20 states have call predecessors, (65), 23 states have return successors, (72), 64 states have call predecessors, (72), 64 states have call successors, (72) [2021-12-17 15:00:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 592 transitions. [2021-12-17 15:00:29,770 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 592 transitions. Word has length 128 [2021-12-17 15:00:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:29,770 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 592 transitions. [2021-12-17 15:00:29,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 15:00:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 592 transitions. [2021-12-17 15:00:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 15:00:29,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:29,773 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:00:29,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:00:29,773 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1805433256, now seen corresponding path program 1 times [2021-12-17 15:00:29,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:29,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112471871] [2021-12-17 15:00:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:29,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 15:00:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 15:00:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 15:00:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 15:00:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 15:00:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 15:00:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 15:00:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 15:00:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 15:00:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 15:00:29,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112471871] [2021-12-17 15:00:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112471871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:29,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:29,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 15:00:29,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586544151] [2021-12-17 15:00:29,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:29,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 15:00:29,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 15:00:29,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:00:29,927 INFO L87 Difference]: Start difference. First operand 389 states and 592 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 15:00:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:32,205 INFO L93 Difference]: Finished difference Result 926 states and 1418 transitions. [2021-12-17 15:00:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:00:32,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 129 [2021-12-17 15:00:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:32,209 INFO L225 Difference]: With dead ends: 926 [2021-12-17 15:00:32,209 INFO L226 Difference]: Without dead ends: 564 [2021-12-17 15:00:32,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-12-17 15:00:32,211 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1260 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 3877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:32,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 2295 Invalid, 3877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 15:00:32,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-17 15:00:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 389. [2021-12-17 15:00:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 300 states have (on average 1.5166666666666666) internal successors, (455), 306 states have internal predecessors, (455), 65 states have call successors, (65), 20 states have call predecessors, (65), 23 states have return successors, (71), 64 states have call predecessors, (71), 64 states have call successors, (71) [2021-12-17 15:00:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 591 transitions. [2021-12-17 15:00:32,238 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 591 transitions. Word has length 129 [2021-12-17 15:00:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:32,238 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 591 transitions. [2021-12-17 15:00:32,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 15:00:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 591 transitions. [2021-12-17 15:00:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-17 15:00:32,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:32,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:00:32,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:00:32,242 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2015086925, now seen corresponding path program 2 times [2021-12-17 15:00:32,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:32,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108165672] [2021-12-17 15:00:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:32,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 15:00:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 15:00:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 15:00:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 15:00:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 15:00:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 15:00:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 15:00:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 15:00:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:00:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 15:00:32,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108165672] [2021-12-17 15:00:32,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108165672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:32,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:32,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 15:00:32,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140005286] [2021-12-17 15:00:32,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:32,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 15:00:32,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:32,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 15:00:32,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:00:32,394 INFO L87 Difference]: Start difference. First operand 389 states and 591 transitions. Second operand has 12 states, 11 states have (on average 7.909090909090909) internal successors, (87), 8 states have internal predecessors, (87), 4 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 15:00:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:34,612 INFO L93 Difference]: Finished difference Result 928 states and 1424 transitions. [2021-12-17 15:00:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:00:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.909090909090909) internal successors, (87), 8 states have internal predecessors, (87), 4 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 130 [2021-12-17 15:00:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:34,620 INFO L225 Difference]: With dead ends: 928 [2021-12-17 15:00:34,620 INFO L226 Difference]: Without dead ends: 566 [2021-12-17 15:00:34,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-12-17 15:00:34,625 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 1255 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 3383 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 3383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:34,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1255 Valid, 2296 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 3383 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 15:00:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-17 15:00:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 391. [2021-12-17 15:00:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 301 states have (on average 1.5149501661129567) internal successors, (456), 308 states have internal predecessors, (456), 65 states have call successors, (65), 20 states have call predecessors, (65), 24 states have return successors, (76), 64 states have call predecessors, (76), 64 states have call successors, (76) [2021-12-17 15:00:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 597 transitions. [2021-12-17 15:00:34,650 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 597 transitions. Word has length 130 [2021-12-17 15:00:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:34,652 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 597 transitions. [2021-12-17 15:00:34,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.909090909090909) internal successors, (87), 8 states have internal predecessors, (87), 4 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 15:00:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 597 transitions. [2021-12-17 15:00:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 15:00:34,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:34,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:00:34,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:00:34,655 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash 606209165, now seen corresponding path program 1 times [2021-12-17 15:00:34,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:34,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129464461] [2021-12-17 15:00:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:34,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:00:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 15:00:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 15:00:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 15:00:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 15:00:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 15:00:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 15:00:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 15:00:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 15:00:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 15:00:34,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129464461] [2021-12-17 15:00:34,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129464461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:00:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565266559] [2021-12-17 15:00:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:34,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:00:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:00:34,818 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 15:00:34,847 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 15:00:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 15:00:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:00:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:00:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:35,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565266559] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:00:35,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:00:35,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 15 [2021-12-17 15:00:35,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857696559] [2021-12-17 15:00:35,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:00:35,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 15:00:35,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 15:00:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:00:35,485 INFO L87 Difference]: Start difference. First operand 391 states and 597 transitions. Second operand has 15 states, 14 states have (on average 10.214285714285714) internal successors, (143), 11 states have internal predecessors, (143), 4 states have call successors, (35), 6 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-17 15:00:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:38,731 INFO L93 Difference]: Finished difference Result 1657 states and 2732 transitions. [2021-12-17 15:00:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:00:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 10.214285714285714) internal successors, (143), 11 states have internal predecessors, (143), 4 states have call successors, (35), 6 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) Word has length 131 [2021-12-17 15:00:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:38,740 INFO L225 Difference]: With dead ends: 1657 [2021-12-17 15:00:38,740 INFO L226 Difference]: Without dead ends: 1297 [2021-12-17 15:00:38,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-12-17 15:00:38,744 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 3510 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 4312 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3512 SdHoareTripleChecker+Valid, 3852 SdHoareTripleChecker+Invalid, 5717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 4312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:38,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3512 Valid, 3852 Invalid, 5717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 4312 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 15:00:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-12-17 15:00:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 744. [2021-12-17 15:00:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 590 states have (on average 1.571186440677966) internal successors, (927), 597 states have internal predecessors, (927), 129 states have call successors, (129), 20 states have call predecessors, (129), 24 states have return successors, (150), 128 states have call predecessors, (150), 128 states have call successors, (150) [2021-12-17 15:00:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1206 transitions. [2021-12-17 15:00:38,810 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1206 transitions. Word has length 131 [2021-12-17 15:00:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:38,810 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 1206 transitions. [2021-12-17 15:00:38,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 10.214285714285714) internal successors, (143), 11 states have internal predecessors, (143), 4 states have call successors, (35), 6 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-17 15:00:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1206 transitions. [2021-12-17 15:00:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-17 15:00:38,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:38,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:38,843 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 15:00:39,030 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 15:00:39,031 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2003089632, now seen corresponding path program 1 times [2021-12-17 15:00:39,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403122678] [2021-12-17 15:00:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:39,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 15:00:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 15:00:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 15:00:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 15:00:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 15:00:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 15:00:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 15:00:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-17 15:00:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-17 15:00:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:39,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:39,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403122678] [2021-12-17 15:00:39,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403122678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:39,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:39,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:39,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496007686] [2021-12-17 15:00:39,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:39,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:39,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:39,123 INFO L87 Difference]: Start difference. First operand 744 states and 1206 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:40,340 INFO L93 Difference]: Finished difference Result 1918 states and 3175 transitions. [2021-12-17 15:00:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-12-17 15:00:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:40,349 INFO L225 Difference]: With dead ends: 1918 [2021-12-17 15:00:40,349 INFO L226 Difference]: Without dead ends: 1252 [2021-12-17 15:00:40,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:40,352 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1135 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:40,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1480 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:00:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-12-17 15:00:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1069. [2021-12-17 15:00:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 851 states have (on average 1.5887191539365453) internal successors, (1352), 858 states have internal predecessors, (1352), 193 states have call successors, (193), 20 states have call predecessors, (193), 24 states have return successors, (224), 192 states have call predecessors, (224), 192 states have call successors, (224) [2021-12-17 15:00:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1769 transitions. [2021-12-17 15:00:40,416 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1769 transitions. Word has length 134 [2021-12-17 15:00:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:40,417 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1769 transitions. [2021-12-17 15:00:40,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1769 transitions. [2021-12-17 15:00:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 15:00:40,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:40,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:40,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:00:40,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -725448431, now seen corresponding path program 1 times [2021-12-17 15:00:40,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860186700] [2021-12-17 15:00:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:40,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 15:00:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 15:00:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 15:00:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 15:00:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 15:00:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-17 15:00:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 15:00:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 15:00:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 15:00:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:40,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860186700] [2021-12-17 15:00:40,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860186700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:40,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:40,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:40,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500305188] [2021-12-17 15:00:40,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:40,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:40,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:40,533 INFO L87 Difference]: Start difference. First operand 1069 states and 1769 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:41,661 INFO L93 Difference]: Finished difference Result 2723 states and 4559 transitions. [2021-12-17 15:00:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2021-12-17 15:00:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:41,674 INFO L225 Difference]: With dead ends: 2723 [2021-12-17 15:00:41,674 INFO L226 Difference]: Without dead ends: 1785 [2021-12-17 15:00:41,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:41,680 INFO L933 BasicCegarLoop]: 639 mSDtfsCounter, 1133 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:41,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 1445 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 15:00:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-12-17 15:00:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1602. [2021-12-17 15:00:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1289 states have (on average 1.5965865011636928) internal successors, (2058), 1296 states have internal predecessors, (2058), 288 states have call successors, (288), 20 states have call predecessors, (288), 24 states have return successors, (319), 287 states have call predecessors, (319), 287 states have call successors, (319) [2021-12-17 15:00:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2665 transitions. [2021-12-17 15:00:41,803 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2665 transitions. Word has length 135 [2021-12-17 15:00:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:41,803 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 2665 transitions. [2021-12-17 15:00:41,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2665 transitions. [2021-12-17 15:00:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 15:00:41,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:41,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:41,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 15:00:41,813 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1399764622, now seen corresponding path program 1 times [2021-12-17 15:00:41,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:41,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938480497] [2021-12-17 15:00:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:41,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 15:00:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 15:00:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 15:00:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 15:00:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 15:00:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 15:00:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 15:00:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:00:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 15:00:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:41,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:41,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938480497] [2021-12-17 15:00:41,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938480497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:41,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:41,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:41,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817401343] [2021-12-17 15:00:41,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:41,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:41,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:41,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:41,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:41,925 INFO L87 Difference]: Start difference. First operand 1602 states and 2665 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:43,192 INFO L93 Difference]: Finished difference Result 3930 states and 6645 transitions. [2021-12-17 15:00:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 136 [2021-12-17 15:00:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:43,207 INFO L225 Difference]: With dead ends: 3930 [2021-12-17 15:00:43,207 INFO L226 Difference]: Without dead ends: 2594 [2021-12-17 15:00:43,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:43,213 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1131 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:43,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1416 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:00:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-12-17 15:00:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2411. [2021-12-17 15:00:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 1975 states have (on average 1.6025316455696204) internal successors, (3165), 1982 states have internal predecessors, (3165), 411 states have call successors, (411), 20 states have call predecessors, (411), 24 states have return successors, (458), 410 states have call predecessors, (458), 410 states have call successors, (458) [2021-12-17 15:00:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 4034 transitions. [2021-12-17 15:00:43,360 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 4034 transitions. Word has length 136 [2021-12-17 15:00:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:43,361 INFO L470 AbstractCegarLoop]: Abstraction has 2411 states and 4034 transitions. [2021-12-17 15:00:43,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 4034 transitions. [2021-12-17 15:00:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 15:00:43,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:43,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:43,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 15:00:43,373 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1059729584, now seen corresponding path program 1 times [2021-12-17 15:00:43,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:43,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474555350] [2021-12-17 15:00:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:43,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 15:00:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 15:00:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 15:00:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 15:00:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 15:00:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 15:00:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 15:00:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 15:00:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-17 15:00:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:43,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474555350] [2021-12-17 15:00:43,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474555350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:43,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:43,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:43,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473828015] [2021-12-17 15:00:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:43,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:43,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:43,524 INFO L87 Difference]: Start difference. First operand 2411 states and 4034 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:44,728 INFO L93 Difference]: Finished difference Result 5814 states and 9905 transitions. [2021-12-17 15:00:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:44,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-12-17 15:00:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:44,751 INFO L225 Difference]: With dead ends: 5814 [2021-12-17 15:00:44,751 INFO L226 Difference]: Without dead ends: 3888 [2021-12-17 15:00:44,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:44,760 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 1129 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:44,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 1422 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:00:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2021-12-17 15:00:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 3705. [2021-12-17 15:00:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3090 states have (on average 1.606148867313916) internal successors, (4963), 3097 states have internal predecessors, (4963), 590 states have call successors, (590), 20 states have call predecessors, (590), 24 states have return successors, (663), 589 states have call predecessors, (663), 589 states have call successors, (663) [2021-12-17 15:00:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 6216 transitions. [2021-12-17 15:00:45,019 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 6216 transitions. Word has length 137 [2021-12-17 15:00:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:45,020 INFO L470 AbstractCegarLoop]: Abstraction has 3705 states and 6216 transitions. [2021-12-17 15:00:45,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 6216 transitions. [2021-12-17 15:00:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 15:00:45,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:45,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:45,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 15:00:45,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash 277368982, now seen corresponding path program 1 times [2021-12-17 15:00:45,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:45,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037573313] [2021-12-17 15:00:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:45,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 15:00:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 15:00:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 15:00:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 15:00:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 15:00:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 15:00:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 15:00:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 15:00:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-17 15:00:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:45,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:45,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037573313] [2021-12-17 15:00:45,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037573313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:45,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:45,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:45,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854958398] [2021-12-17 15:00:45,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:45,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:45,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:45,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:45,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:45,241 INFO L87 Difference]: Start difference. First operand 3705 states and 6216 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:46,672 INFO L93 Difference]: Finished difference Result 8917 states and 15269 transitions. [2021-12-17 15:00:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:46,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 138 [2021-12-17 15:00:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:46,704 INFO L225 Difference]: With dead ends: 8917 [2021-12-17 15:00:46,705 INFO L226 Difference]: Without dead ends: 6029 [2021-12-17 15:00:46,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:46,717 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 1127 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:46,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 1446 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 15:00:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2021-12-17 15:00:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 5846. [2021-12-17 15:00:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5846 states, 4855 states have (on average 1.600205973223481) internal successors, (7769), 4862 states have internal predecessors, (7769), 966 states have call successors, (966), 20 states have call predecessors, (966), 24 states have return successors, (1083), 965 states have call predecessors, (1083), 965 states have call successors, (1083) [2021-12-17 15:00:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5846 states to 5846 states and 9818 transitions. [2021-12-17 15:00:47,130 INFO L78 Accepts]: Start accepts. Automaton has 5846 states and 9818 transitions. Word has length 138 [2021-12-17 15:00:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:47,130 INFO L470 AbstractCegarLoop]: Abstraction has 5846 states and 9818 transitions. [2021-12-17 15:00:47,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5846 states and 9818 transitions. [2021-12-17 15:00:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 15:00:47,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:47,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:47,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 15:00:47,154 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash 140546444, now seen corresponding path program 1 times [2021-12-17 15:00:47,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:47,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728747916] [2021-12-17 15:00:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:47,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 15:00:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 15:00:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 15:00:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 15:00:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 15:00:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 15:00:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 15:00:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 15:00:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 15:00:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:47,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:47,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728747916] [2021-12-17 15:00:47,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728747916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:47,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:47,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:47,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547742179] [2021-12-17 15:00:47,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:47,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:47,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:47,289 INFO L87 Difference]: Start difference. First operand 5846 states and 9818 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:48,791 INFO L93 Difference]: Finished difference Result 14534 states and 24882 transitions. [2021-12-17 15:00:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-12-17 15:00:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:48,839 INFO L225 Difference]: With dead ends: 14534 [2021-12-17 15:00:48,840 INFO L226 Difference]: Without dead ends: 9907 [2021-12-17 15:00:48,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:48,862 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 1125 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:48,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 1426 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:00:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9907 states. [2021-12-17 15:00:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9907 to 9724. [2021-12-17 15:00:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9724 states, 8127 states have (on average 1.598129691152947) internal successors, (12988), 8134 states have internal predecessors, (12988), 1572 states have call successors, (1572), 20 states have call predecessors, (1572), 24 states have return successors, (1767), 1571 states have call predecessors, (1767), 1571 states have call successors, (1767) [2021-12-17 15:00:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9724 states to 9724 states and 16327 transitions. [2021-12-17 15:00:49,502 INFO L78 Accepts]: Start accepts. Automaton has 9724 states and 16327 transitions. Word has length 139 [2021-12-17 15:00:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:49,503 INFO L470 AbstractCegarLoop]: Abstraction has 9724 states and 16327 transitions. [2021-12-17 15:00:49,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 9724 states and 16327 transitions. [2021-12-17 15:00:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-17 15:00:49,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:49,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:49,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 15:00:49,536 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:49,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1438515912, now seen corresponding path program 1 times [2021-12-17 15:00:49,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:49,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113829921] [2021-12-17 15:00:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:49,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 15:00:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 15:00:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 15:00:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 15:00:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 15:00:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 15:00:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-17 15:00:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-17 15:00:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 15:00:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:49,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113829921] [2021-12-17 15:00:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113829921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:49,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:49,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:49,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446137945] [2021-12-17 15:00:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:49,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:49,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:49,645 INFO L87 Difference]: Start difference. First operand 9724 states and 16327 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:51,555 INFO L93 Difference]: Finished difference Result 25243 states and 43163 transitions. [2021-12-17 15:00:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-12-17 15:00:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:51,624 INFO L225 Difference]: With dead ends: 25243 [2021-12-17 15:00:51,624 INFO L226 Difference]: Without dead ends: 17220 [2021-12-17 15:00:51,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:51,652 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 1123 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:51,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1488 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:00:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17220 states. [2021-12-17 15:00:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17220 to 17037. [2021-12-17 15:00:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17037 states, 14237 states have (on average 1.5898012221675915) internal successors, (22634), 14244 states have internal predecessors, (22634), 2775 states have call successors, (2775), 20 states have call predecessors, (2775), 24 states have return successors, (3114), 2774 states have call predecessors, (3114), 2774 states have call successors, (3114) [2021-12-17 15:00:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 28523 transitions. [2021-12-17 15:00:52,666 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 28523 transitions. Word has length 140 [2021-12-17 15:00:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:52,666 INFO L470 AbstractCegarLoop]: Abstraction has 17037 states and 28523 transitions. [2021-12-17 15:00:52,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 28523 transitions. [2021-12-17 15:00:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 15:00:52,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:52,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:52,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 15:00:52,717 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1518474229, now seen corresponding path program 1 times [2021-12-17 15:00:52,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:52,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196943205] [2021-12-17 15:00:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:52,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 15:00:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 15:00:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 15:00:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 15:00:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 15:00:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 15:00:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 15:00:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 15:00:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 15:00:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:52,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:52,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196943205] [2021-12-17 15:00:52,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196943205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:52,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:52,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:52,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359091597] [2021-12-17 15:00:52,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:52,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:52,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:52,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:52,937 INFO L87 Difference]: Start difference. First operand 17037 states and 28523 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:00:55,427 INFO L93 Difference]: Finished difference Result 45219 states and 77176 transitions. [2021-12-17 15:00:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:00:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-12-17 15:00:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:00:55,564 INFO L225 Difference]: With dead ends: 45219 [2021-12-17 15:00:55,565 INFO L226 Difference]: Without dead ends: 30560 [2021-12-17 15:00:55,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:00:55,614 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 1121 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:00:55,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 1427 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:00:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30560 states. [2021-12-17 15:00:57,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30560 to 30377. [2021-12-17 15:00:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30377 states, 25538 states have (on average 1.5857545618294306) internal successors, (40497), 25545 states have internal predecessors, (40497), 4814 states have call successors, (4814), 20 states have call predecessors, (4814), 24 states have return successors, (5427), 4813 states have call predecessors, (5427), 4813 states have call successors, (5427) [2021-12-17 15:00:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30377 states to 30377 states and 50738 transitions. [2021-12-17 15:00:57,229 INFO L78 Accepts]: Start accepts. Automaton has 30377 states and 50738 transitions. Word has length 141 [2021-12-17 15:00:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:00:57,229 INFO L470 AbstractCegarLoop]: Abstraction has 30377 states and 50738 transitions. [2021-12-17 15:00:57,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:00:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 30377 states and 50738 transitions. [2021-12-17 15:00:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 15:00:57,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:00:57,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:57,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 15:00:57,283 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:00:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:00:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1327471622, now seen corresponding path program 1 times [2021-12-17 15:00:57,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:00:57,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352450634] [2021-12-17 15:00:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:00:57,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:00:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:00:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:00:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:00:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:00:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:00:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:00:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 15:00:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 15:00:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 15:00:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 15:00:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-17 15:00:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 15:00:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:00:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 15:00:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-17 15:00:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:00:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:00:57,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:00:57,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352450634] [2021-12-17 15:00:57,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352450634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:00:57,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:00:57,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:00:57,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698430205] [2021-12-17 15:00:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:00:57,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:00:57,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:00:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:00:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:00:57,395 INFO L87 Difference]: Start difference. First operand 30377 states and 50738 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:01:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:01:01,106 INFO L93 Difference]: Finished difference Result 82956 states and 140700 transitions. [2021-12-17 15:01:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:01:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 142 [2021-12-17 15:01:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:01:01,335 INFO L225 Difference]: With dead ends: 82956 [2021-12-17 15:01:01,335 INFO L226 Difference]: Without dead ends: 55769 [2021-12-17 15:01:01,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:01:01,408 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 1119 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:01:01,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1421 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 15:01:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55769 states. [2021-12-17 15:01:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55769 to 55586. [2021-12-17 15:01:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55586 states, 47032 states have (on average 1.5803708113624766) internal successors, (74328), 47039 states have internal predecessors, (74328), 8529 states have call successors, (8529), 20 states have call predecessors, (8529), 24 states have return successors, (9674), 8528 states have call predecessors, (9674), 8528 states have call successors, (9674) [2021-12-17 15:01:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55586 states to 55586 states and 92531 transitions. [2021-12-17 15:01:04,753 INFO L78 Accepts]: Start accepts. Automaton has 55586 states and 92531 transitions. Word has length 142 [2021-12-17 15:01:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:01:04,754 INFO L470 AbstractCegarLoop]: Abstraction has 55586 states and 92531 transitions. [2021-12-17 15:01:04,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:01:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 55586 states and 92531 transitions. [2021-12-17 15:01:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 15:01:04,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:01:04,817 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:04,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 15:01:04,818 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:01:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:01:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash -862922485, now seen corresponding path program 1 times [2021-12-17 15:01:04,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:01:04,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545868015] [2021-12-17 15:01:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:01:04,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:01:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:01:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:01:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:01:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:01:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:01:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:01:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 15:01:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 15:01:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 15:01:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 15:01:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 15:01:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 15:01:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 15:01:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-17 15:01:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 15:01:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 15:01:04,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:01:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545868015] [2021-12-17 15:01:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545868015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:01:04,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:01:04,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:01:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530184591] [2021-12-17 15:01:04,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:01:04,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:01:04,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:01:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:01:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:01:04,908 INFO L87 Difference]: Start difference. First operand 55586 states and 92531 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:01:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:01:10,018 INFO L93 Difference]: Finished difference Result 104012 states and 176686 transitions. [2021-12-17 15:01:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:01:10,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 143 [2021-12-17 15:01:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:01:10,581 INFO L225 Difference]: With dead ends: 104012 [2021-12-17 15:01:10,581 INFO L226 Difference]: Without dead ends: 103843 [2021-12-17 15:01:10,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:01:10,646 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 1117 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:01:10,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 1427 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:01:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103843 states. [2021-12-17 15:01:15,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103843 to 103660. [2021-12-17 15:01:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103660 states, 88307 states have (on average 1.573589862638296) internal successors, (138959), 88314 states have internal predecessors, (138959), 15328 states have call successors, (15328), 20 states have call predecessors, (15328), 24 states have return successors, (17519), 15327 states have call predecessors, (17519), 15327 states have call successors, (17519) [2021-12-17 15:01:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103660 states to 103660 states and 171806 transitions. [2021-12-17 15:01:16,396 INFO L78 Accepts]: Start accepts. Automaton has 103660 states and 171806 transitions. Word has length 143 [2021-12-17 15:01:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:01:16,397 INFO L470 AbstractCegarLoop]: Abstraction has 103660 states and 171806 transitions. [2021-12-17 15:01:16,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 15:01:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 103660 states and 171806 transitions. [2021-12-17 15:01:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-17 15:01:16,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:01:16,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:01:16,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 15:01:16,472 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:01:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:01:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1901199879, now seen corresponding path program 1 times [2021-12-17 15:01:16,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:01:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574906345] [2021-12-17 15:01:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:01:16,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:01:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 15:01:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:01:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 15:01:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 15:01:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 15:01:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 15:01:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 15:01:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 15:01:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 15:01:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 15:01:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 15:01:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 15:01:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 15:01:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-17 15:01:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 15:01:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 15:01:16,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:01:16,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574906345] [2021-12-17 15:01:16,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574906345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:01:16,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132617012] [2021-12-17 15:01:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:01:16,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:01:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:01:16,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:01:16,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 15:01:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:01:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 15:01:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:01:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 15:01:17,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:01:17,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132617012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:01:17,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:01:17,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2021-12-17 15:01:17,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386432467] [2021-12-17 15:01:17,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:01:17,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 15:01:17,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:01:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 15:01:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-12-17 15:01:17,935 INFO L87 Difference]: Start difference. First operand 103660 states and 171806 transitions. Second operand has 12 states, 11 states have (on average 9.636363636363637) internal successors, (106), 9 states have internal predecessors, (106), 5 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15)