./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/email_spec4_product18.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_spec4_product18.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 bf462270e0c7c70d13b1dd17e19a66c26542ea365ec57459489c94e9a63941a0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 14:58:08,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:58:08,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:58:08,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:58:08,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:58:08,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:58:08,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:58:08,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:58:08,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:58:08,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:58:08,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:58:08,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:58:08,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:58:08,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:58:08,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:58:08,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:58:08,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:58:08,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:58:08,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:58:08,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:58:08,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:58:08,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:58:08,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:58:08,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:58:08,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:58:08,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:58:08,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:58:08,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:58:08,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:58:08,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:58:08,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:58:08,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:58:08,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:58:08,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:58:08,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:58:08,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:58:08,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:58:08,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:58:08,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:58:08,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:58:08,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:58:08,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:58:08,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:58:08,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:58:08,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:58:08,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:58:08,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:58:08,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:58:08,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:58:08,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:58:08,521 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:58:08,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:58:08,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:58:08,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:58:08,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:58:08,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:58:08,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:58:08,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:58:08,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:58:08,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:58:08,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:58:08,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:58:08,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:58:08,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:58:08,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:58:08,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:58:08,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:58:08,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:58:08,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:58:08,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:58:08,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:58:08,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:58:08,526 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:58:08,526 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:58:08,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:58:08,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:58:08,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf462270e0c7c70d13b1dd17e19a66c26542ea365ec57459489c94e9a63941a0 [2021-12-17 14:58:08,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:58:08,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:58:08,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:58:08,738 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:58:08,738 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:58:08,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec4_product18.cil.c [2021-12-17 14:58:08,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae672d7bd/8183e22226144cbd861f1ab7dae1f083/FLAGbd58fb264 [2021-12-17 14:58:09,242 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:58:09,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec4_product18.cil.c [2021-12-17 14:58:09,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae672d7bd/8183e22226144cbd861f1ab7dae1f083/FLAGbd58fb264 [2021-12-17 14:58:09,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae672d7bd/8183e22226144cbd861f1ab7dae1f083 [2021-12-17 14:58:09,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:58:09,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:58:09,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:58:09,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:58:09,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:58:09,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1234f736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09, skipping insertion in model container [2021-12-17 14:58:09,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:58:09,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:58:09,675 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_spec4_product18.cil.c[61907,61920] [2021-12-17 14:58:09,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:58:09,692 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:58:09,790 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_spec4_product18.cil.c[61907,61920] [2021-12-17 14:58:09,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:58:09,812 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:58:09,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09 WrapperNode [2021-12-17 14:58:09,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:58:09,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:58:09,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:58:09,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:58:09,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,912 INFO L137 Inliner]: procedures = 127, calls = 199, calls flagged for inlining = 58, calls inlined = 49, statements flattened = 892 [2021-12-17 14:58:09,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:58:09,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:58:09,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:58:09,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:58:09,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:58:09,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:58:09,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:58:09,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:58:09,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (1/1) ... [2021-12-17 14:58:09,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:58:10,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:10,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 14:58:10,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 14:58:10,045 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-12-17 14:58:10,045 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-12-17 14:58:10,045 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-17 14:58:10,045 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-17 14:58:10,045 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-17 14:58:10,045 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-17 14:58:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-12-17 14:58:10,046 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-12-17 14:58:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-12-17 14:58:10,046 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-12-17 14:58:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-12-17 14:58:10,046 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-12-17 14:58:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-12-17 14:58:10,046 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-12-17 14:58:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-17 14:58:10,047 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-12-17 14:58:10,047 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-12-17 14:58:10,047 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-17 14:58:10,047 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-17 14:58:10,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:58:10,047 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-12-17 14:58:10,047 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-12-17 14:58:10,047 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-12-17 14:58:10,048 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-12-17 14:58:10,048 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-12-17 14:58:10,048 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-12-17 14:58:10,048 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-17 14:58:10,048 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-17 14:58:10,048 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-17 14:58:10,048 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-17 14:58:10,049 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-12-17 14:58:10,049 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-12-17 14:58:10,049 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-12-17 14:58:10,049 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-12-17 14:58:10,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:58:10,049 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-12-17 14:58:10,050 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-12-17 14:58:10,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:58:10,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:58:10,217 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:58:10,224 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:58:10,584 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:58:10,590 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:58:10,590 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:58:10,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:58:10 BoogieIcfgContainer [2021-12-17 14:58:10,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:58:10,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:58:10,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:58:10,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:58:10,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:58:09" (1/3) ... [2021-12-17 14:58:10,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8dead9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:58:10, skipping insertion in model container [2021-12-17 14:58:10,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:58:09" (2/3) ... [2021-12-17 14:58:10,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8dead9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:58:10, skipping insertion in model container [2021-12-17 14:58:10,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:58:10" (3/3) ... [2021-12-17 14:58:10,598 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product18.cil.c [2021-12-17 14:58:10,601 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:58:10,601 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:58:10,641 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:58:10,646 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 14:58:10,647 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:58:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 291 states, 232 states have (on average 1.543103448275862) internal successors, (358), 234 states have internal predecessors, (358), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-17 14:58:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 14:58:10,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:10,692 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] [2021-12-17 14:58:10,693 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1024121513, now seen corresponding path program 1 times [2021-12-17 14:58:10,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:10,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237081470] [2021-12-17 14:58:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:10,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:10,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:58:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:58:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:58:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 14:58:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:58:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:58:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:58:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 14:58:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:58:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,136 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 14:58:11,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:11,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237081470] [2021-12-17 14:58:11,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237081470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:58:11,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186077373] [2021-12-17 14:58:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:11,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:11,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:11,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:58:11,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:58:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 14:58:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:58:11,530 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 14:58:11,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:58:11,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186077373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:11,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:58:11,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2021-12-17 14:58:11,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33341582] [2021-12-17 14:58:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 14:58:11,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:11,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 14:58:11,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:58:11,564 INFO L87 Difference]: Start difference. First operand has 291 states, 232 states have (on average 1.543103448275862) internal successors, (358), 234 states have internal predecessors, (358), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:11,614 INFO L93 Difference]: Finished difference Result 428 states and 630 transitions. [2021-12-17 14:58:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 14:58:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2021-12-17 14:58:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:11,628 INFO L225 Difference]: With dead ends: 428 [2021-12-17 14:58:11,628 INFO L226 Difference]: Without dead ends: 284 [2021-12-17 14:58:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:58:11,637 INFO L933 BasicCegarLoop]: 434 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, 434 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:11,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:58:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-17 14:58:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2021-12-17 14:58:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 226 states have (on average 1.5353982300884956) internal successors, (347), 227 states have internal predecessors, (347), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 14:58:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 426 transitions. [2021-12-17 14:58:11,689 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 426 transitions. Word has length 92 [2021-12-17 14:58:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:11,690 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 426 transitions. [2021-12-17 14:58:11,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 426 transitions. [2021-12-17 14:58:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 14:58:11,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:11,694 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] [2021-12-17 14:58:11,716 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 14:58:11,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-17 14:58:11,908 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:11,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2075349837, now seen corresponding path program 1 times [2021-12-17 14:58:11,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:11,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226294569] [2021-12-17 14:58:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:11,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:58:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:58:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:58:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 14:58:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 14:58:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:58:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:58:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 14:58:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:58:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,018 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 14:58:12,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:12,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226294569] [2021-12-17 14:58:12,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226294569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:58:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145518027] [2021-12-17 14:58:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:12,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:12,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:58:12,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:58:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:58:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:58:12,371 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 14:58:12,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:58:12,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145518027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:12,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:58:12,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-17 14:58:12,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916309846] [2021-12-17 14:58:12,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:12,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:58:12,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:58:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:58:12,374 INFO L87 Difference]: Start difference. First operand 284 states and 426 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:12,395 INFO L93 Difference]: Finished difference Result 418 states and 611 transitions. [2021-12-17 14:58:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:58:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 93 [2021-12-17 14:58:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:12,400 INFO L225 Difference]: With dead ends: 418 [2021-12-17 14:58:12,400 INFO L226 Difference]: Without dead ends: 287 [2021-12-17 14:58:12,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:58:12,402 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 1 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:12,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 846 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:58:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-17 14:58:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2021-12-17 14:58:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 228 states have (on average 1.530701754385965) internal successors, (349), 229 states have internal predecessors, (349), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 14:58:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 428 transitions. [2021-12-17 14:58:12,423 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 428 transitions. Word has length 93 [2021-12-17 14:58:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:12,423 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 428 transitions. [2021-12-17 14:58:12,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 428 transitions. [2021-12-17 14:58:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 14:58:12,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:12,426 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] [2021-12-17 14:58:12,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 14:58:12,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-17 14:58:12,635 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:12,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1689423486, now seen corresponding path program 1 times [2021-12-17 14:58:12,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:12,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778235510] [2021-12-17 14:58:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:12,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:58:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:58:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:58:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:58:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:58:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:58:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 14:58:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 14:58:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 14:58:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,771 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 14:58:12,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778235510] [2021-12-17 14:58:12,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778235510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:58:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739629997] [2021-12-17 14:58:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:12,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:12,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:12,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:58:12,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:58:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:12,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:58:12,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:58:13,109 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 14:58:13,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:58:13,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739629997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:13,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:58:13,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-17 14:58:13,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959419072] [2021-12-17 14:58:13,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:13,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:58:13,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:58:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:58:13,112 INFO L87 Difference]: Start difference. First operand 286 states and 428 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:13,127 INFO L93 Difference]: Finished difference Result 602 states and 915 transitions. [2021-12-17 14:58:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:58:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 102 [2021-12-17 14:58:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:13,129 INFO L225 Difference]: With dead ends: 602 [2021-12-17 14:58:13,130 INFO L226 Difference]: Without dead ends: 343 [2021-12-17 14:58:13,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:58:13,131 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 107 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:13,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 821 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:58:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-17 14:58:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 335. [2021-12-17 14:58:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 266 states have (on average 1.5451127819548873) internal successors, (411), 267 states have internal predecessors, (411), 51 states have call successors, (51), 17 states have call predecessors, (51), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-12-17 14:58:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 512 transitions. [2021-12-17 14:58:13,147 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 512 transitions. Word has length 102 [2021-12-17 14:58:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 512 transitions. [2021-12-17 14:58:13,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 512 transitions. [2021-12-17 14:58:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 14:58:13,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:13,149 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] [2021-12-17 14:58:13,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 14:58:13,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:13,368 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 406530022, now seen corresponding path program 1 times [2021-12-17 14:58:13,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584225506] [2021-12-17 14:58:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:13,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 14:58:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:58:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:58:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 14:58:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:58:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:58:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:58:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 14:58:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 14:58:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,482 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 14:58:13,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584225506] [2021-12-17 14:58:13,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584225506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:58:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372043814] [2021-12-17 14:58:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:13,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:13,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:58:13,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:58:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 14:58:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:58:13,822 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 14:58:13,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:58:13,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372043814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:13,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:58:13,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-17 14:58:13,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901325098] [2021-12-17 14:58:13,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:13,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:58:13,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:58:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:58:13,825 INFO L87 Difference]: Start difference. First operand 335 states and 512 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:13,870 INFO L93 Difference]: Finished difference Result 661 states and 1014 transitions. [2021-12-17 14:58:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:58:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 103 [2021-12-17 14:58:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:13,874 INFO L225 Difference]: With dead ends: 661 [2021-12-17 14:58:13,874 INFO L226 Difference]: Without dead ends: 337 [2021-12-17 14:58:13,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 120 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 14:58:13,875 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 125 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:13,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1524 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:58:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-17 14:58:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2021-12-17 14:58:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 267 states have (on average 1.5430711610486891) internal successors, (412), 269 states have internal predecessors, (412), 51 states have call successors, (51), 17 states have call predecessors, (51), 18 states have return successors, (52), 50 states have call predecessors, (52), 50 states have call successors, (52) [2021-12-17 14:58:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 515 transitions. [2021-12-17 14:58:13,886 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 515 transitions. Word has length 103 [2021-12-17 14:58:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:13,886 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 515 transitions. [2021-12-17 14:58:13,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 515 transitions. [2021-12-17 14:58:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 14:58:13,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:13,888 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] [2021-12-17 14:58:13,922 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 14:58:14,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:14,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 33479798, now seen corresponding path program 1 times [2021-12-17 14:58:14,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:14,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137695663] [2021-12-17 14:58:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:14,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 14:58:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:58:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:58:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 14:58:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:58:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 14:58:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 14:58:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 14:58:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,242 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 14:58:14,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:14,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137695663] [2021-12-17 14:58:14,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137695663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:58:14,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206994538] [2021-12-17 14:58:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:14,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:14,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:14,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:58:14,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 14:58:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 14:58:14,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:58:14,595 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 14:58:14,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:58:14,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206994538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:14,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:58:14,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2021-12-17 14:58:14,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042823111] [2021-12-17 14:58:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:58:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:58:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:58:14,598 INFO L87 Difference]: Start difference. First operand 337 states and 515 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:14,645 INFO L93 Difference]: Finished difference Result 663 states and 1019 transitions. [2021-12-17 14:58:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:58:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 104 [2021-12-17 14:58:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:14,649 INFO L225 Difference]: With dead ends: 663 [2021-12-17 14:58:14,649 INFO L226 Difference]: Without dead ends: 339 [2021-12-17 14:58:14,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 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 14:58:14,651 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 124 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:14,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1513 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:58:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-17 14:58:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2021-12-17 14:58:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.541044776119403) internal successors, (413), 271 states have internal predecessors, (413), 51 states have call successors, (51), 17 states have call predecessors, (51), 19 states have return successors, (57), 50 states have call predecessors, (57), 50 states have call successors, (57) [2021-12-17 14:58:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 521 transitions. [2021-12-17 14:58:14,667 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 521 transitions. Word has length 104 [2021-12-17 14:58:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:14,668 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 521 transitions. [2021-12-17 14:58:14,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 521 transitions. [2021-12-17 14:58:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 14:58:14,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:14,670 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] [2021-12-17 14:58:14,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 14:58:14,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:14,894 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:14,895 INFO L85 PathProgramCache]: Analyzing trace with hash -851300096, now seen corresponding path program 1 times [2021-12-17 14:58:14,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:14,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417363765] [2021-12-17 14:58:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:14,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 14:58:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 14:58:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:58:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:58:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:58:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 14:58:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 14:58:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:14,975 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 14:58:14,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:14,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417363765] [2021-12-17 14:58:14,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417363765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:14,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:14,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:58:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340205681] [2021-12-17 14:58:14,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:14,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:58:14,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:58:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:58:14,977 INFO L87 Difference]: Start difference. First operand 339 states and 521 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:16,011 INFO L93 Difference]: Finished difference Result 759 states and 1172 transitions. [2021-12-17 14:58:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:58:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 105 [2021-12-17 14:58:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:16,014 INFO L225 Difference]: With dead ends: 759 [2021-12-17 14:58:16,014 INFO L226 Difference]: Without dead ends: 443 [2021-12-17 14:58:16,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 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 14:58:16,016 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1008 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:16,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1474 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 14:58:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-17 14:58:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 339. [2021-12-17 14:58:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.541044776119403) internal successors, (413), 271 states have internal predecessors, (413), 51 states have call successors, (51), 17 states have call predecessors, (51), 19 states have return successors, (56), 50 states have call predecessors, (56), 50 states have call successors, (56) [2021-12-17 14:58:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 520 transitions. [2021-12-17 14:58:16,033 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 520 transitions. Word has length 105 [2021-12-17 14:58:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:16,033 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 520 transitions. [2021-12-17 14:58:16,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 520 transitions. [2021-12-17 14:58:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 14:58:16,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:16,035 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] [2021-12-17 14:58:16,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 14:58:16,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 855567918, now seen corresponding path program 2 times [2021-12-17 14:58:16,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476570029] [2021-12-17 14:58:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:16,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:58:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:58:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 14:58:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 14:58:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:58:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:58:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 14:58:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:16,112 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 14:58:16,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:16,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476570029] [2021-12-17 14:58:16,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476570029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:16,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:16,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 14:58:16,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655898271] [2021-12-17 14:58:16,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:16,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:58:16,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:58:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:58:16,114 INFO L87 Difference]: Start difference. First operand 339 states and 520 transitions. Second operand has 9 states, 8 states have (on average 8.25) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:17,101 INFO L93 Difference]: Finished difference Result 761 states and 1175 transitions. [2021-12-17 14:58:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:58:17,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.25) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 106 [2021-12-17 14:58:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:17,104 INFO L225 Difference]: With dead ends: 761 [2021-12-17 14:58:17,104 INFO L226 Difference]: Without dead ends: 445 [2021-12-17 14:58:17,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 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 14:58:17,106 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 1003 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:17,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 1475 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 14:58:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-17 14:58:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 341. [2021-12-17 14:58:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 269 states have (on average 1.5390334572490707) internal successors, (414), 273 states have internal predecessors, (414), 51 states have call successors, (51), 17 states have call predecessors, (51), 20 states have return successors, (58), 50 states have call predecessors, (58), 50 states have call successors, (58) [2021-12-17 14:58:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 523 transitions. [2021-12-17 14:58:17,121 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 523 transitions. Word has length 106 [2021-12-17 14:58:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:17,121 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 523 transitions. [2021-12-17 14:58:17,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.25) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 14:58:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 523 transitions. [2021-12-17 14:58:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 14:58:17,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:17,123 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] [2021-12-17 14:58:17,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 14:58:17,123 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash -189507835, now seen corresponding path program 1 times [2021-12-17 14:58:17,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:17,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499852352] [2021-12-17 14:58:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:17,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:58:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:58:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:58:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 14:58:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 14:58:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 14:58:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:17,227 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 14:58:17,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499852352] [2021-12-17 14:58:17,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499852352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:17,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:17,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 14:58:17,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522886812] [2021-12-17 14:58:17,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:17,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 14:58:17,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 14:58:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:58:17,229 INFO L87 Difference]: Start difference. First operand 341 states and 523 transitions. Second operand has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 14:58:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:18,589 INFO L93 Difference]: Finished difference Result 759 states and 1170 transitions. [2021-12-17 14:58:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 14:58:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 107 [2021-12-17 14:58:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:18,601 INFO L225 Difference]: With dead ends: 759 [2021-12-17 14:58:18,602 INFO L226 Difference]: Without dead ends: 445 [2021-12-17 14:58:18,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 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 14:58:18,603 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 1114 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:18,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1888 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 14:58:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-17 14:58:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 341. [2021-12-17 14:58:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 269 states have (on average 1.5390334572490707) internal successors, (414), 273 states have internal predecessors, (414), 51 states have call successors, (51), 17 states have call predecessors, (51), 20 states have return successors, (57), 50 states have call predecessors, (57), 50 states have call successors, (57) [2021-12-17 14:58:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 522 transitions. [2021-12-17 14:58:18,619 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 522 transitions. Word has length 107 [2021-12-17 14:58:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:18,619 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 522 transitions. [2021-12-17 14:58:18,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 14:58:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 522 transitions. [2021-12-17 14:58:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 14:58:18,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:18,621 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] [2021-12-17 14:58:18,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 14:58:18,621 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:18,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1159401631, now seen corresponding path program 2 times [2021-12-17 14:58:18,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:18,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296925762] [2021-12-17 14:58:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:18,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:58:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:58:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 14:58:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 14:58:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 14:58:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 14:58:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:18,733 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 14:58:18,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296925762] [2021-12-17 14:58:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296925762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:18,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 14:58:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542164906] [2021-12-17 14:58:18,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:18,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 14:58:18,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 14:58:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:58:18,735 INFO L87 Difference]: Start difference. First operand 341 states and 522 transitions. Second operand has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 14:58:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:20,089 INFO L93 Difference]: Finished difference Result 761 states and 1176 transitions. [2021-12-17 14:58:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 14:58:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 108 [2021-12-17 14:58:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:20,092 INFO L225 Difference]: With dead ends: 761 [2021-12-17 14:58:20,092 INFO L226 Difference]: Without dead ends: 447 [2021-12-17 14:58:20,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 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 14:58:20,093 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 1109 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:20,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 1889 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2614 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 14:58:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-17 14:58:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2021-12-17 14:58:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 270 states have (on average 1.537037037037037) internal successors, (415), 275 states have internal predecessors, (415), 51 states have call successors, (51), 17 states have call predecessors, (51), 21 states have return successors, (62), 50 states have call predecessors, (62), 50 states have call successors, (62) [2021-12-17 14:58:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 528 transitions. [2021-12-17 14:58:20,107 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 528 transitions. Word has length 108 [2021-12-17 14:58:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:20,108 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 528 transitions. [2021-12-17 14:58:20,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 14:58:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 528 transitions. [2021-12-17 14:58:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 14:58:20,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:20,110 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] [2021-12-17 14:58:20,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 14:58:20,110 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2042043830, now seen corresponding path program 1 times [2021-12-17 14:58:20,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:20,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774505468] [2021-12-17 14:58:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:20,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 14:58:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:58:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 14:58:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 14:58:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 14:58:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:58:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,233 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 14:58:20,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774505468] [2021-12-17 14:58:20,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774505468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:58:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399759902] [2021-12-17 14:58:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:20,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:20,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:20,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:58:20,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 14:58:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:58:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:58:20,570 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 14:58:20,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:58:20,725 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 14:58:20,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399759902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:58:20,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:58:20,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 15 [2021-12-17 14:58:20,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256347440] [2021-12-17 14:58:20,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:58:20,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 14:58:20,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 14:58:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:58:20,727 INFO L87 Difference]: Start difference. First operand 343 states and 528 transitions. Second operand has 15 states, 14 states have (on average 8.428571428571429) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (29), 6 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-12-17 14:58:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:22,977 INFO L93 Difference]: Finished difference Result 1440 states and 2404 transitions. [2021-12-17 14:58:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 14:58:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 8.428571428571429) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (29), 6 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 109 [2021-12-17 14:58:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:22,983 INFO L225 Difference]: With dead ends: 1440 [2021-12-17 14:58:22,983 INFO L226 Difference]: Without dead ends: 1128 [2021-12-17 14:58:22,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-12-17 14:58:22,986 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 2758 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 3963 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2760 SdHoareTripleChecker+Valid, 3520 SdHoareTripleChecker+Invalid, 4886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 3963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:22,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2760 Valid, 3520 Invalid, 4886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 3963 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 14:58:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-12-17 14:58:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 671. [2021-12-17 14:58:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 534 states have (on average 1.5842696629213484) internal successors, (846), 539 states have internal predecessors, (846), 115 states have call successors, (115), 17 states have call predecessors, (115), 21 states have return successors, (136), 114 states have call predecessors, (136), 114 states have call successors, (136) [2021-12-17 14:58:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1097 transitions. [2021-12-17 14:58:23,016 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1097 transitions. Word has length 109 [2021-12-17 14:58:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:23,017 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1097 transitions. [2021-12-17 14:58:23,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 8.428571428571429) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (29), 6 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-12-17 14:58:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1097 transitions. [2021-12-17 14:58:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:58:23,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:23,019 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] [2021-12-17 14:58:23,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 14:58:23,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:23,235 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1028197055, now seen corresponding path program 1 times [2021-12-17 14:58:23,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540173876] [2021-12-17 14:58:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:23,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:58:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:58:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 14:58:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:58:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 14:58:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 14:58:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:23,307 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 14:58:23,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:23,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540173876] [2021-12-17 14:58:23,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540173876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:23,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:23,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:23,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411114399] [2021-12-17 14:58:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:23,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:23,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:23,309 INFO L87 Difference]: Start difference. First operand 671 states and 1097 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:24,088 INFO L93 Difference]: Finished difference Result 1676 states and 2807 transitions. [2021-12-17 14:58:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 112 [2021-12-17 14:58:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:24,094 INFO L225 Difference]: With dead ends: 1676 [2021-12-17 14:58:24,094 INFO L226 Difference]: Without dead ends: 1083 [2021-12-17 14:58:24,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:24,096 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 997 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:24,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1250 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:58:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-12-17 14:58:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 971. [2021-12-17 14:58:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 770 states have (on average 1.5987012987012987) internal successors, (1231), 775 states have internal predecessors, (1231), 179 states have call successors, (179), 17 states have call predecessors, (179), 21 states have return successors, (210), 178 states have call predecessors, (210), 178 states have call successors, (210) [2021-12-17 14:58:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1620 transitions. [2021-12-17 14:58:24,141 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1620 transitions. Word has length 112 [2021-12-17 14:58:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:24,142 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1620 transitions. [2021-12-17 14:58:24,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1620 transitions. [2021-12-17 14:58:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 14:58:24,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:24,145 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] [2021-12-17 14:58:24,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 14:58:24,145 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:24,146 INFO L85 PathProgramCache]: Analyzing trace with hash 342356814, now seen corresponding path program 1 times [2021-12-17 14:58:24,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:24,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677729753] [2021-12-17 14:58:24,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:24,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:58:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:58:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:58:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 14:58:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 14:58:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 14:58:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:24,208 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 14:58:24,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:24,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677729753] [2021-12-17 14:58:24,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677729753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:24,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:24,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:24,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830628675] [2021-12-17 14:58:24,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:24,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:24,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:24,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:24,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:24,209 INFO L87 Difference]: Start difference. First operand 971 states and 1620 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:24,982 INFO L93 Difference]: Finished difference Result 2416 states and 4087 transitions. [2021-12-17 14:58:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-12-17 14:58:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:24,990 INFO L225 Difference]: With dead ends: 2416 [2021-12-17 14:58:24,990 INFO L226 Difference]: Without dead ends: 1576 [2021-12-17 14:58:24,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:24,993 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 995 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:24,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1240 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:58:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-12-17 14:58:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1464. [2021-12-17 14:58:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1168 states have (on average 1.6035958904109588) internal successors, (1873), 1173 states have internal predecessors, (1873), 274 states have call successors, (274), 17 states have call predecessors, (274), 21 states have return successors, (305), 273 states have call predecessors, (305), 273 states have call successors, (305) [2021-12-17 14:58:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2452 transitions. [2021-12-17 14:58:25,056 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2452 transitions. Word has length 113 [2021-12-17 14:58:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:25,056 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 2452 transitions. [2021-12-17 14:58:25,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:25,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2452 transitions. [2021-12-17 14:58:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 14:58:25,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:25,061 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] [2021-12-17 14:58:25,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 14:58:25,061 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash 913875667, now seen corresponding path program 1 times [2021-12-17 14:58:25,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:25,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078277426] [2021-12-17 14:58:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:25,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:58:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:58:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 14:58:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 14:58:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 14:58:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 14:58:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:25,137 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 14:58:25,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078277426] [2021-12-17 14:58:25,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078277426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:25,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:25,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:25,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399743185] [2021-12-17 14:58:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:25,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:25,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:25,139 INFO L87 Difference]: Start difference. First operand 1464 states and 2452 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:25,939 INFO L93 Difference]: Finished difference Result 3518 states and 6005 transitions. [2021-12-17 14:58:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2021-12-17 14:58:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:25,948 INFO L225 Difference]: With dead ends: 3518 [2021-12-17 14:58:25,948 INFO L226 Difference]: Without dead ends: 2320 [2021-12-17 14:58:25,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:25,952 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 993 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:25,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 1235 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:58:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-12-17 14:58:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2208. [2021-12-17 14:58:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 1789 states have (on average 1.6076020122973729) internal successors, (2876), 1794 states have internal predecessors, (2876), 397 states have call successors, (397), 17 states have call predecessors, (397), 21 states have return successors, (444), 396 states have call predecessors, (444), 396 states have call successors, (444) [2021-12-17 14:58:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3717 transitions. [2021-12-17 14:58:26,055 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3717 transitions. Word has length 114 [2021-12-17 14:58:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:26,056 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 3717 transitions. [2021-12-17 14:58:26,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3717 transitions. [2021-12-17 14:58:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 14:58:26,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:26,062 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] [2021-12-17 14:58:26,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 14:58:26,062 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:26,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1746348205, now seen corresponding path program 1 times [2021-12-17 14:58:26,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:26,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205627820] [2021-12-17 14:58:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:26,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:58:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 14:58:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:58:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 14:58:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 14:58:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 14:58:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:26,123 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 14:58:26,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:26,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205627820] [2021-12-17 14:58:26,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205627820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:26,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:26,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:26,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185433714] [2021-12-17 14:58:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:26,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:26,125 INFO L87 Difference]: Start difference. First operand 2208 states and 3717 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:26,960 INFO L93 Difference]: Finished difference Result 5227 states and 8985 transitions. [2021-12-17 14:58:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 115 [2021-12-17 14:58:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:26,974 INFO L225 Difference]: With dead ends: 5227 [2021-12-17 14:58:26,975 INFO L226 Difference]: Without dead ends: 3504 [2021-12-17 14:58:26,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:26,980 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 991 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:26,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1239 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:58:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-12-17 14:58:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 3392. [2021-12-17 14:58:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 2794 states have (on average 1.6098783106657122) internal successors, (4498), 2799 states have internal predecessors, (4498), 576 states have call successors, (576), 17 states have call predecessors, (576), 21 states have return successors, (649), 575 states have call predecessors, (649), 575 states have call successors, (649) [2021-12-17 14:58:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 5723 transitions. [2021-12-17 14:58:27,141 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 5723 transitions. Word has length 115 [2021-12-17 14:58:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:27,141 INFO L470 AbstractCegarLoop]: Abstraction has 3392 states and 5723 transitions. [2021-12-17 14:58:27,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 5723 transitions. [2021-12-17 14:58:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 14:58:27,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:27,148 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] [2021-12-17 14:58:27,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 14:58:27,149 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 81862775, now seen corresponding path program 1 times [2021-12-17 14:58:27,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:27,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798772081] [2021-12-17 14:58:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:27,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:58:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:58:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:58:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 14:58:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:58:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-17 14:58:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:27,218 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 14:58:27,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798772081] [2021-12-17 14:58:27,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798772081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:27,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:27,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:27,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223275598] [2021-12-17 14:58:27,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:27,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:27,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:27,220 INFO L87 Difference]: Start difference. First operand 3392 states and 5723 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:28,110 INFO L93 Difference]: Finished difference Result 8300 states and 14301 transitions. [2021-12-17 14:58:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-12-17 14:58:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:28,133 INFO L225 Difference]: With dead ends: 8300 [2021-12-17 14:58:28,133 INFO L226 Difference]: Without dead ends: 5645 [2021-12-17 14:58:28,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:28,141 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 989 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:28,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 1257 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:58:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2021-12-17 14:58:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 5533. [2021-12-17 14:58:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 4559 states have (on average 1.6021057249396797) internal successors, (7304), 4564 states have internal predecessors, (7304), 952 states have call successors, (952), 17 states have call predecessors, (952), 21 states have return successors, (1069), 951 states have call predecessors, (1069), 951 states have call successors, (1069) [2021-12-17 14:58:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 9325 transitions. [2021-12-17 14:58:28,421 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 9325 transitions. Word has length 116 [2021-12-17 14:58:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:28,421 INFO L470 AbstractCegarLoop]: Abstraction has 5533 states and 9325 transitions. [2021-12-17 14:58:28,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 9325 transitions. [2021-12-17 14:58:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 14:58:28,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:28,448 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] [2021-12-17 14:58:28,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 14:58:28,449 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash -448101623, now seen corresponding path program 1 times [2021-12-17 14:58:28,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:28,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810585028] [2021-12-17 14:58:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:28,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:58:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 14:58:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 14:58:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 14:58:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 14:58:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 14:58:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:28,523 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 14:58:28,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:28,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810585028] [2021-12-17 14:58:28,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810585028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:28,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:28,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:28,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662434155] [2021-12-17 14:58:28,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:28,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:28,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:28,525 INFO L87 Difference]: Start difference. First operand 5533 states and 9325 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:29,572 INFO L93 Difference]: Finished difference Result 13722 states and 23602 transitions. [2021-12-17 14:58:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 117 [2021-12-17 14:58:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:29,622 INFO L225 Difference]: With dead ends: 13722 [2021-12-17 14:58:29,623 INFO L226 Difference]: Without dead ends: 9328 [2021-12-17 14:58:29,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:29,636 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 987 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:29,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 1248 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:58:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-12-17 14:58:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9216. [2021-12-17 14:58:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 7636 states have (on average 1.5991356731272919) internal successors, (12211), 7641 states have internal predecessors, (12211), 1558 states have call successors, (1558), 17 states have call predecessors, (1558), 21 states have return successors, (1753), 1557 states have call predecessors, (1753), 1557 states have call successors, (1753) [2021-12-17 14:58:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 15522 transitions. [2021-12-17 14:58:30,101 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 15522 transitions. Word has length 117 [2021-12-17 14:58:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:30,101 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 15522 transitions. [2021-12-17 14:58:30,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 15522 transitions. [2021-12-17 14:58:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 14:58:30,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:30,115 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] [2021-12-17 14:58:30,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 14:58:30,115 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1807777429, now seen corresponding path program 1 times [2021-12-17 14:58:30,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:30,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191172213] [2021-12-17 14:58:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:30,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:58:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 14:58:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 14:58:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 14:58:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 14:58:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 14:58:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:30,188 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 14:58:30,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191172213] [2021-12-17 14:58:30,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191172213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:30,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:30,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:30,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64807463] [2021-12-17 14:58:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:30,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:30,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:30,190 INFO L87 Difference]: Start difference. First operand 9216 states and 15522 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:31,442 INFO L93 Difference]: Finished difference Result 23906 states and 41043 transitions. [2021-12-17 14:58:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2021-12-17 14:58:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:31,490 INFO L225 Difference]: With dead ends: 23906 [2021-12-17 14:58:31,490 INFO L226 Difference]: Without dead ends: 16281 [2021-12-17 14:58:31,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:31,513 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 985 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:31,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1284 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 14:58:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16281 states. [2021-12-17 14:58:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16281 to 16169. [2021-12-17 14:58:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16169 states, 13386 states have (on average 1.5897953085313015) internal successors, (21281), 13391 states have internal predecessors, (21281), 2761 states have call successors, (2761), 17 states have call predecessors, (2761), 21 states have return successors, (3100), 2760 states have call predecessors, (3100), 2760 states have call successors, (3100) [2021-12-17 14:58:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 27142 transitions. [2021-12-17 14:58:32,255 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 27142 transitions. Word has length 118 [2021-12-17 14:58:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:32,256 INFO L470 AbstractCegarLoop]: Abstraction has 16169 states and 27142 transitions. [2021-12-17 14:58:32,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 27142 transitions. [2021-12-17 14:58:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 14:58:32,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:32,271 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] [2021-12-17 14:58:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 14:58:32,271 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash 642347208, now seen corresponding path program 1 times [2021-12-17 14:58:32,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323103590] [2021-12-17 14:58:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:32,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:58:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 14:58:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 14:58:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 14:58:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 14:58:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 14:58:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:32,342 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 14:58:32,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323103590] [2021-12-17 14:58:32,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323103590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:32,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:32,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:32,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970182127] [2021-12-17 14:58:32,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:32,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:32,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:32,345 INFO L87 Difference]: Start difference. First operand 16169 states and 27142 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:34,184 INFO L93 Difference]: Finished difference Result 42872 states and 73440 transitions. [2021-12-17 14:58:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-12-17 14:58:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:34,285 INFO L225 Difference]: With dead ends: 42872 [2021-12-17 14:58:34,286 INFO L226 Difference]: Without dead ends: 28936 [2021-12-17 14:58:34,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:34,323 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 983 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:34,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1240 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:58:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28936 states. [2021-12-17 14:58:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28936 to 28824. [2021-12-17 14:58:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28824 states, 24002 states have (on average 1.585201233230564) internal successors, (38048), 24007 states have internal predecessors, (38048), 4800 states have call successors, (4800), 17 states have call predecessors, (4800), 21 states have return successors, (5413), 4799 states have call predecessors, (5413), 4799 states have call successors, (5413) [2021-12-17 14:58:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28824 states to 28824 states and 48261 transitions. [2021-12-17 14:58:35,667 INFO L78 Accepts]: Start accepts. Automaton has 28824 states and 48261 transitions. Word has length 119 [2021-12-17 14:58:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:35,668 INFO L470 AbstractCegarLoop]: Abstraction has 28824 states and 48261 transitions. [2021-12-17 14:58:35,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 28824 states and 48261 transitions. [2021-12-17 14:58:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 14:58:35,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:35,687 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] [2021-12-17 14:58:35,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 14:58:35,687 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1660997549, now seen corresponding path program 1 times [2021-12-17 14:58:35,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:35,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117882775] [2021-12-17 14:58:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:35,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 14:58:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 14:58:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 14:58:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 14:58:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 14:58:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 14:58:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:35,776 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 14:58:35,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117882775] [2021-12-17 14:58:35,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117882775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:35,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:35,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:35,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27712946] [2021-12-17 14:58:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:35,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:35,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:35,778 INFO L87 Difference]: Start difference. First operand 28824 states and 48261 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:38,574 INFO L93 Difference]: Finished difference Result 78634 states and 133804 transitions. [2021-12-17 14:58:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-12-17 14:58:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:38,900 INFO L225 Difference]: With dead ends: 78634 [2021-12-17 14:58:38,901 INFO L226 Difference]: Without dead ends: 52815 [2021-12-17 14:58:38,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:38,953 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 981 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:38,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1248 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:58:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52815 states. [2021-12-17 14:58:41,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52815 to 52703. [2021-12-17 14:58:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52703 states, 44166 states have (on average 1.5792917628945342) internal successors, (69751), 44171 states have internal predecessors, (69751), 8515 states have call successors, (8515), 17 states have call predecessors, (8515), 21 states have return successors, (9660), 8514 states have call predecessors, (9660), 8514 states have call successors, (9660) [2021-12-17 14:58:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52703 states to 52703 states and 87926 transitions. [2021-12-17 14:58:41,566 INFO L78 Accepts]: Start accepts. Automaton has 52703 states and 87926 transitions. Word has length 120 [2021-12-17 14:58:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:41,567 INFO L470 AbstractCegarLoop]: Abstraction has 52703 states and 87926 transitions. [2021-12-17 14:58:41,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 52703 states and 87926 transitions. [2021-12-17 14:58:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 14:58:41,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:41,586 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] [2021-12-17 14:58:41,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 14:58:41,586 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash -884455480, now seen corresponding path program 1 times [2021-12-17 14:58:41,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667196719] [2021-12-17 14:58:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:41,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:58:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 14:58:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 14:58:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 14:58:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 14:58:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 14:58:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:41,662 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 14:58:41,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:41,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667196719] [2021-12-17 14:58:41,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667196719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:58:41,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:58:41,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:58:41,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834210310] [2021-12-17 14:58:41,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:58:41,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:58:41,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:41,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:58:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:58:41,665 INFO L87 Difference]: Start difference. First operand 52703 states and 87926 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:58:45,462 INFO L93 Difference]: Finished difference Result 98405 states and 167734 transitions. [2021-12-17 14:58:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:58:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 121 [2021-12-17 14:58:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:58:45,900 INFO L225 Difference]: With dead ends: 98405 [2021-12-17 14:58:45,901 INFO L226 Difference]: Without dead ends: 98274 [2021-12-17 14:58:45,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 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 14:58:45,939 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 979 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:58:45,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1240 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 14:58:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98274 states. [2021-12-17 14:58:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98274 to 98162. [2021-12-17 14:58:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98162 states, 82826 states have (on average 1.571946007292396) internal successors, (130198), 82831 states have internal predecessors, (130198), 15314 states have call successors, (15314), 17 states have call predecessors, (15314), 21 states have return successors, (17505), 15313 states have call predecessors, (17505), 15313 states have call successors, (17505) [2021-12-17 14:58:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98162 states to 98162 states and 163017 transitions. [2021-12-17 14:58:50,312 INFO L78 Accepts]: Start accepts. Automaton has 98162 states and 163017 transitions. Word has length 121 [2021-12-17 14:58:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:58:50,312 INFO L470 AbstractCegarLoop]: Abstraction has 98162 states and 163017 transitions. [2021-12-17 14:58:50,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 14:58:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 98162 states and 163017 transitions. [2021-12-17 14:58:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-17 14:58:50,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:58:50,330 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] [2021-12-17 14:58:50,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 14:58:50,330 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:58:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:58:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash -366796012, now seen corresponding path program 1 times [2021-12-17 14:58:50,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:58:50,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245980880] [2021-12-17 14:58:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:50,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:58:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 14:58:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:58:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:58:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 14:58:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:58:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:58:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 14:58:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:58:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:58:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:58:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 14:58:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 14:58:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 14:58:50,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:58:50,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245980880] [2021-12-17 14:58:50,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245980880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:58:50,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211931149] [2021-12-17 14:58:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:58:50,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:58:50,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:58:50,469 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 14:58:50,469 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 14:58:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:58:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 14:58:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:58:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:58:50,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:58:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:58:51,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211931149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:58:51,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:58:51,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-17 14:58:51,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219580575] [2021-12-17 14:58:51,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:58:51,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 14:58:51,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:58:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 14:58:51,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-12-17 14:58:51,271 INFO L87 Difference]: Start difference. First operand 98162 states and 163017 transitions. Second operand has 27 states, 27 states have (on average 7.666666666666667) internal successors, (207), 20 states have internal predecessors, (207), 5 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31)