./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:09:33,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:09:33,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:09:33,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:09:33,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:09:33,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:09:33,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:09:33,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:09:33,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:09:33,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:09:33,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:09:33,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:09:33,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:09:33,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:09:33,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:09:33,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:09:33,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:09:33,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:09:33,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:09:33,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:09:33,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:09:33,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:09:33,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:09:33,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:09:33,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:09:33,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:09:33,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:09:33,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:09:33,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:09:33,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:09:33,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:09:33,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:09:33,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:09:33,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:09:33,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:09:33,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:09:33,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:09:33,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:09:33,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:09:33,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:09:33,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:09:33,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:09:33,497 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:09:33,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:09:33,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:09:33,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:09:33,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:09:33,499 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:09:33,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:09:33,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:09:33,500 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:09:33,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:09:33,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:09:33,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:09:33,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:09:33,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:09:33,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:09:33,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:09:33,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:09:33,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:09:33,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:09:33,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:09:33,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:09:33,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:09:33,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:09:33,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:09:33,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:09:33,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:09:33,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:09:33,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:09:33,503 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:09:33,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:09:33,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:09:33,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 [2021-12-21 16:09:33,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:09:33,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:09:33,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:09:33,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:09:33,723 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:09:33,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-12-21 16:09:33,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042124ac1/696e6c0ced084bb2ac0527c98bb6d21f/FLAG871cc7fc2 [2021-12-21 16:09:34,365 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:09:34,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-12-21 16:09:34,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042124ac1/696e6c0ced084bb2ac0527c98bb6d21f/FLAG871cc7fc2 [2021-12-21 16:09:34,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042124ac1/696e6c0ced084bb2ac0527c98bb6d21f [2021-12-21 16:09:34,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:09:34,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:09:34,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:09:34,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:09:34,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:09:34,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:09:34" (1/1) ... [2021-12-21 16:09:34,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbff000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:34, skipping insertion in model container [2021-12-21 16:09:34,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:09:34" (1/1) ... [2021-12-21 16:09:34,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:09:34,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:09:35,205 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/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-12-21 16:09:35,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:09:35,621 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:09:35,716 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/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-12-21 16:09:35,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:09:35,889 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:09:35,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35 WrapperNode [2021-12-21 16:09:35,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:09:35,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:09:35,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:09:35,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:09:35,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:35,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,019 INFO L137 Inliner]: procedures = 165, calls = 691, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 1770 [2021-12-21 16:09:36,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:09:36,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:09:36,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:09:36,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:09:36,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:09:36,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:09:36,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:09:36,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:09:36,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (1/1) ... [2021-12-21 16:09:36,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:09:36,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:09:36,180 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) [2021-12-21 16:09:36,198 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 [2021-12-21 16:09:36,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_12 [2021-12-21 16:09:36,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_12 [2021-12-21 16:09:36,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:09:36,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_8 [2021-12-21 16:09:36,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_8 [2021-12-21 16:09:36,213 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rx_submit [2021-12-21 16:09:36,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rx_submit [2021-12-21 16:09:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_9 [2021-12-21 16:09:36,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_9 [2021-12-21 16:09:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:09:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:09:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:09:36,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:09:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:09:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-12-21 16:09:36,214 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-12-21 16:09:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-12-21 16:09:36,215 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-12-21 16:09:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rcvbulk_callback [2021-12-21 16:09:36,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rcvbulk_callback [2021-12-21 16:09:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-12-21 16:09:36,215 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-12-21 16:09:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-21 16:09:36,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-21 16:09:36,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:09:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:09:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-21 16:09:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-21 16:09:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:09:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:09:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-21 16:09:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-21 16:09:36,216 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-21 16:09:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-21 16:09:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:09:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:09:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_disconnect [2021-12-21 16:09:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_disconnect [2021-12-21 16:09:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_tx_timeout [2021-12-21 16:09:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_tx_timeout [2021-12-21 16:09:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:09:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:09:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:09:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:09:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:09:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:09:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:09:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_carrier_set [2021-12-21 16:09:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_carrier_set [2021-12-21 16:09:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-21 16:09:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-21 16:09:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:09:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-21 16:09:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-21 16:09:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:09:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-21 16:09:36,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-21 16:09:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_free_urbs [2021-12-21 16:09:36,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_free_urbs [2021-12-21 16:09:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:09:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:09:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:09:36,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-21 16:09:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-12-21 16:09:36,222 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-12-21 16:09:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-12-21 16:09:36,222 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-12-21 16:09:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:09:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-21 16:09:36,222 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-21 16:09:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:09:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:09:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-12-21 16:09:36,223 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-12-21 16:09:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-21 16:09:36,223 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-21 16:09:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-21 16:09:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-21 16:09:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-21 16:09:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-21 16:09:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:09:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_relative [2021-12-21 16:09:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_relative [2021-12-21 16:09:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:09:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:09:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:09:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-12-21 16:09:36,225 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-12-21 16:09:36,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:09:36,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:09:36,596 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:09:36,598 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:09:36,807 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:09:37,133 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-21 16:09:37,522 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:09:37,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:09:37,531 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 16:09:37,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:09:37 BoogieIcfgContainer [2021-12-21 16:09:37,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:09:37,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:09:37,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:09:37,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:09:37,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:09:34" (1/3) ... [2021-12-21 16:09:37,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21068e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:09:37, skipping insertion in model container [2021-12-21 16:09:37,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:09:35" (2/3) ... [2021-12-21 16:09:37,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21068e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:09:37, skipping insertion in model container [2021-12-21 16:09:37,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:09:37" (3/3) ... [2021-12-21 16:09:37,540 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-12-21 16:09:37,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:09:37,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:09:37,577 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:09:37,581 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 [2021-12-21 16:09:37,581 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:09:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 527 states, 386 states have (on average 1.3031088082901554) internal successors, (503), 405 states have internal predecessors, (503), 104 states have call successors, (104), 37 states have call predecessors, (104), 35 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-12-21 16:09:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 16:09:37,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:37,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:37,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash -60987296, now seen corresponding path program 1 times [2021-12-21 16:09:37,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:37,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915689278] [2021-12-21 16:09:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:37,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 16:09:37,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:37,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915689278] [2021-12-21 16:09:37,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915689278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:37,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:37,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:09:37,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749691548] [2021-12-21 16:09:37,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:37,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:09:37,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:09:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:09:37,992 INFO L87 Difference]: Start difference. First operand has 527 states, 386 states have (on average 1.3031088082901554) internal successors, (503), 405 states have internal predecessors, (503), 104 states have call successors, (104), 37 states have call predecessors, (104), 35 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:38,957 INFO L93 Difference]: Finished difference Result 1626 states and 2252 transitions. [2021-12-21 16:09:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:09:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-12-21 16:09:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:38,985 INFO L225 Difference]: With dead ends: 1626 [2021-12-21 16:09:38,985 INFO L226 Difference]: Without dead ends: 1080 [2021-12-21 16:09:38,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:38,993 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 965 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:38,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1536 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 16:09:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-12-21 16:09:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 992. [2021-12-21 16:09:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 738 states have (on average 1.2764227642276422) internal successors, (942), 754 states have internal predecessors, (942), 185 states have call successors, (185), 69 states have call predecessors, (185), 68 states have return successors, (180), 174 states have call predecessors, (180), 180 states have call successors, (180) [2021-12-21 16:09:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1307 transitions. [2021-12-21 16:09:39,130 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1307 transitions. Word has length 34 [2021-12-21 16:09:39,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:39,130 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1307 transitions. [2021-12-21 16:09:39,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 16:09:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1307 transitions. [2021-12-21 16:09:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 16:09:39,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:39,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:39,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:09:39,134 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:39,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash -406405667, now seen corresponding path program 1 times [2021-12-21 16:09:39,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:39,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831326466] [2021-12-21 16:09:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:39,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:09:39,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:39,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831326466] [2021-12-21 16:09:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831326466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:39,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:09:39,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72569990] [2021-12-21 16:09:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:39,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:09:39,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:09:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:09:39,308 INFO L87 Difference]: Start difference. First operand 992 states and 1307 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:39,804 INFO L93 Difference]: Finished difference Result 1106 states and 1483 transitions. [2021-12-21 16:09:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:09:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-21 16:09:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:39,810 INFO L225 Difference]: With dead ends: 1106 [2021-12-21 16:09:39,810 INFO L226 Difference]: Without dead ends: 1093 [2021-12-21 16:09:39,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:39,833 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 800 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:39,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 935 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:09:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-12-21 16:09:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 992. [2021-12-21 16:09:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 738 states have (on average 1.2750677506775068) internal successors, (941), 754 states have internal predecessors, (941), 185 states have call successors, (185), 69 states have call predecessors, (185), 68 states have return successors, (180), 174 states have call predecessors, (180), 180 states have call successors, (180) [2021-12-21 16:09:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1306 transitions. [2021-12-21 16:09:39,864 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1306 transitions. Word has length 44 [2021-12-21 16:09:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:39,864 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1306 transitions. [2021-12-21 16:09:39,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1306 transitions. [2021-12-21 16:09:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 16:09:39,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:39,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:39,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:09:39,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash -349147365, now seen corresponding path program 1 times [2021-12-21 16:09:39,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:39,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345212967] [2021-12-21 16:09:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:39,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:09:39,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345212967] [2021-12-21 16:09:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345212967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:39,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:39,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:09:39,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886758726] [2021-12-21 16:09:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:39,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:09:39,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:09:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:09:39,971 INFO L87 Difference]: Start difference. First operand 992 states and 1306 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:40,929 INFO L93 Difference]: Finished difference Result 3133 states and 4280 transitions. [2021-12-21 16:09:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:09:40,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-21 16:09:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:40,939 INFO L225 Difference]: With dead ends: 3133 [2021-12-21 16:09:40,939 INFO L226 Difference]: Without dead ends: 2150 [2021-12-21 16:09:40,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:40,942 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 969 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:40,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1548 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 16:09:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-21 16:09:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2000. [2021-12-21 16:09:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1487 states have (on average 1.2703429724277069) internal successors, (1889), 1519 states have internal predecessors, (1889), 366 states have call successors, (366), 137 states have call predecessors, (366), 146 states have return successors, (415), 355 states have call predecessors, (415), 361 states have call successors, (415) [2021-12-21 16:09:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2670 transitions. [2021-12-21 16:09:41,005 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2670 transitions. Word has length 44 [2021-12-21 16:09:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:41,006 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 2670 transitions. [2021-12-21 16:09:41,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2670 transitions. [2021-12-21 16:09:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 16:09:41,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:41,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:41,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:09:41,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2061086592, now seen corresponding path program 1 times [2021-12-21 16:09:41,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:41,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607558131] [2021-12-21 16:09:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:41,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:09:41,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607558131] [2021-12-21 16:09:41,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607558131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:41,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:41,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:09:41,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293480502] [2021-12-21 16:09:41,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:41,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:09:41,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:09:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:09:41,154 INFO L87 Difference]: Start difference. First operand 2000 states and 2670 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:41,666 INFO L93 Difference]: Finished difference Result 2142 states and 2912 transitions. [2021-12-21 16:09:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:09:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-12-21 16:09:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:41,675 INFO L225 Difference]: With dead ends: 2142 [2021-12-21 16:09:41,675 INFO L226 Difference]: Without dead ends: 2139 [2021-12-21 16:09:41,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:41,676 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 776 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:41,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 892 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:09:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-12-21 16:09:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1999. [2021-12-21 16:09:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1487 states have (on average 1.269670477471419) internal successors, (1888), 1518 states have internal predecessors, (1888), 365 states have call successors, (365), 137 states have call predecessors, (365), 146 states have return successors, (415), 355 states have call predecessors, (415), 361 states have call successors, (415) [2021-12-21 16:09:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 2668 transitions. [2021-12-21 16:09:41,729 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 2668 transitions. Word has length 45 [2021-12-21 16:09:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:41,730 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 2668 transitions. [2021-12-21 16:09:41,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 2668 transitions. [2021-12-21 16:09:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 16:09:41,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:41,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:41,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:09:41,732 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash -531067202, now seen corresponding path program 1 times [2021-12-21 16:09:41,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:41,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778110311] [2021-12-21 16:09:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:41,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:09:41,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:41,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778110311] [2021-12-21 16:09:41,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778110311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:41,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:41,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:09:41,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177918090] [2021-12-21 16:09:41,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:41,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:09:41,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:41,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:09:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:09:41,826 INFO L87 Difference]: Start difference. First operand 1999 states and 2668 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:42,309 INFO L93 Difference]: Finished difference Result 2141 states and 2910 transitions. [2021-12-21 16:09:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:09:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-12-21 16:09:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:42,318 INFO L225 Difference]: With dead ends: 2141 [2021-12-21 16:09:42,318 INFO L226 Difference]: Without dead ends: 2138 [2021-12-21 16:09:42,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:42,320 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 773 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:42,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 889 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:09:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-12-21 16:09:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1998. [2021-12-21 16:09:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1487 states have (on average 1.2689979825151312) internal successors, (1887), 1517 states have internal predecessors, (1887), 364 states have call successors, (364), 137 states have call predecessors, (364), 146 states have return successors, (415), 355 states have call predecessors, (415), 361 states have call successors, (415) [2021-12-21 16:09:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 2666 transitions. [2021-12-21 16:09:42,387 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 2666 transitions. Word has length 46 [2021-12-21 16:09:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:42,387 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 2666 transitions. [2021-12-21 16:09:42,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 2666 transitions. [2021-12-21 16:09:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 16:09:42,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:42,388 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:42,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:09:42,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash 716548675, now seen corresponding path program 1 times [2021-12-21 16:09:42,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:42,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806216120] [2021-12-21 16:09:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:42,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:42,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:42,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:42,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:42,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:09:42,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806216120] [2021-12-21 16:09:42,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806216120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:42,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:42,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:09:42,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554230984] [2021-12-21 16:09:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:42,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:09:42,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:09:42,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:09:42,465 INFO L87 Difference]: Start difference. First operand 1998 states and 2666 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:42,909 INFO L93 Difference]: Finished difference Result 2140 states and 2908 transitions. [2021-12-21 16:09:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:09:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-12-21 16:09:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:42,917 INFO L225 Difference]: With dead ends: 2140 [2021-12-21 16:09:42,917 INFO L226 Difference]: Without dead ends: 2137 [2021-12-21 16:09:42,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:42,918 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 771 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:42,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 883 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:09:42,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-12-21 16:09:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1997. [2021-12-21 16:09:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1487 states have (on average 1.2683254875588432) internal successors, (1886), 1516 states have internal predecessors, (1886), 363 states have call successors, (363), 137 states have call predecessors, (363), 146 states have return successors, (415), 355 states have call predecessors, (415), 361 states have call successors, (415) [2021-12-21 16:09:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 2664 transitions. [2021-12-21 16:09:42,995 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 2664 transitions. Word has length 47 [2021-12-21 16:09:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:42,995 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 2664 transitions. [2021-12-21 16:09:42,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 2664 transitions. [2021-12-21 16:09:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 16:09:42,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:42,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:42,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:09:42,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash 737940065, now seen corresponding path program 1 times [2021-12-21 16:09:42,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117262502] [2021-12-21 16:09:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:42,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 16:09:43,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117262502] [2021-12-21 16:09:43,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117262502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:43,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:43,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:09:43,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061182374] [2021-12-21 16:09:43,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:43,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:09:43,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:09:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:09:43,076 INFO L87 Difference]: Start difference. First operand 1997 states and 2664 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:43,519 INFO L93 Difference]: Finished difference Result 2139 states and 2906 transitions. [2021-12-21 16:09:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:09:43,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-12-21 16:09:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:43,528 INFO L225 Difference]: With dead ends: 2139 [2021-12-21 16:09:43,528 INFO L226 Difference]: Without dead ends: 2127 [2021-12-21 16:09:43,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:09:43,531 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 767 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:43,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 885 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:09:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-12-21 16:09:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1987. [2021-12-21 16:09:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1478 states have (on average 1.2679296346414073) internal successors, (1874), 1506 states have internal predecessors, (1874), 362 states have call successors, (362), 137 states have call predecessors, (362), 146 states have return successors, (415), 355 states have call predecessors, (415), 361 states have call successors, (415) [2021-12-21 16:09:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2651 transitions. [2021-12-21 16:09:43,591 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2651 transitions. Word has length 48 [2021-12-21 16:09:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:43,591 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 2651 transitions. [2021-12-21 16:09:43,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:09:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2651 transitions. [2021-12-21 16:09:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-21 16:09:43,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:43,595 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:43,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:09:43,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1153772682, now seen corresponding path program 1 times [2021-12-21 16:09:43,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:43,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456842403] [2021-12-21 16:09:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:43,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:09:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 16:09:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 16:09:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 16:09:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 16:09:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 16:09:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 16:09:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:09:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:09:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:09:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 16:09:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 16:09:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-21 16:09:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 16:09:43,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456842403] [2021-12-21 16:09:43,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456842403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:43,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:43,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:09:43,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862563309] [2021-12-21 16:09:43,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:43,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:09:43,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:09:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:09:43,795 INFO L87 Difference]: Start difference. First operand 1987 states and 2651 transitions. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:09:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:44,980 INFO L93 Difference]: Finished difference Result 5900 states and 7924 transitions. [2021-12-21 16:09:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:09:44,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 153 [2021-12-21 16:09:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:44,996 INFO L225 Difference]: With dead ends: 5900 [2021-12-21 16:09:44,996 INFO L226 Difference]: Without dead ends: 3922 [2021-12-21 16:09:45,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:09:45,006 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 1544 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1584 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:45,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1584 Valid, 1835 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:09:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2021-12-21 16:09:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 3516. [2021-12-21 16:09:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3516 states, 2593 states have (on average 1.261473197069032) internal successors, (3271), 2651 states have internal predecessors, (3271), 625 states have call successors, (625), 258 states have call predecessors, (625), 297 states have return successors, (774), 626 states have call predecessors, (774), 624 states have call successors, (774) [2021-12-21 16:09:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 3516 states and 4670 transitions. [2021-12-21 16:09:45,171 INFO L78 Accepts]: Start accepts. Automaton has 3516 states and 4670 transitions. Word has length 153 [2021-12-21 16:09:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:45,171 INFO L470 AbstractCegarLoop]: Abstraction has 3516 states and 4670 transitions. [2021-12-21 16:09:45,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:09:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3516 states and 4670 transitions. [2021-12-21 16:09:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 16:09:45,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:45,178 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:45,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:09:45,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash 425318257, now seen corresponding path program 1 times [2021-12-21 16:09:45,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:45,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217027593] [2021-12-21 16:09:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:45,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:09:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:09:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 16:09:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:09:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:09:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:09:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 16:09:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 16:09:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:09:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:09:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-21 16:09:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 16:09:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 16:09:45,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:45,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217027593] [2021-12-21 16:09:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217027593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:45,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:09:45,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:09:45,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049250091] [2021-12-21 16:09:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:09:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:09:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:09:45,404 INFO L87 Difference]: Start difference. First operand 3516 states and 4670 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:09:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:46,162 INFO L93 Difference]: Finished difference Result 7416 states and 9930 transitions. [2021-12-21 16:09:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:09:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2021-12-21 16:09:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:46,178 INFO L225 Difference]: With dead ends: 7416 [2021-12-21 16:09:46,179 INFO L226 Difference]: Without dead ends: 3916 [2021-12-21 16:09:46,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:09:46,189 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 867 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:46,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1459 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:09:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-12-21 16:09:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3520. [2021-12-21 16:09:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 2597 states have (on average 1.261070465922218) internal successors, (3275), 2655 states have internal predecessors, (3275), 625 states have call successors, (625), 258 states have call predecessors, (625), 297 states have return successors, (774), 626 states have call predecessors, (774), 624 states have call successors, (774) [2021-12-21 16:09:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 4674 transitions. [2021-12-21 16:09:46,327 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 4674 transitions. Word has length 162 [2021-12-21 16:09:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:46,328 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 4674 transitions. [2021-12-21 16:09:46,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:09:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 4674 transitions. [2021-12-21 16:09:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 16:09:46,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:46,336 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:46,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 16:09:46,337 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:46,337 INFO L85 PathProgramCache]: Analyzing trace with hash -632519821, now seen corresponding path program 1 times [2021-12-21 16:09:46,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:46,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061601063] [2021-12-21 16:09:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:46,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:09:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:09:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 16:09:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:09:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:09:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:09:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 16:09:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 16:09:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:09:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:09:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-21 16:09:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 16:09:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 16:09:46,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061601063] [2021-12-21 16:09:46,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061601063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:09:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825816203] [2021-12-21 16:09:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:46,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:09:46,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:09:46,551 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) [2021-12-21 16:09:46,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 16:09:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 16:09:47,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:09:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-21 16:09:47,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:09:47,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825816203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:47,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:09:47,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-21 16:09:47,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935140122] [2021-12-21 16:09:47,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:09:47,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:09:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:09:47,219 INFO L87 Difference]: Start difference. First operand 3520 states and 4674 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:09:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:47,498 INFO L93 Difference]: Finished difference Result 9962 states and 13915 transitions. [2021-12-21 16:09:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:09:47,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2021-12-21 16:09:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:47,534 INFO L225 Difference]: With dead ends: 9962 [2021-12-21 16:09:47,534 INFO L226 Difference]: Without dead ends: 6458 [2021-12-21 16:09:47,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-21 16:09:47,547 INFO L933 BasicCegarLoop]: 1154 mSDtfsCounter, 852 mSDsluCounter, 2715 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 3869 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:47,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 3869 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:09:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2021-12-21 16:09:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 3532. [2021-12-21 16:09:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3532 states, 2609 states have (on average 1.2598696818704485) internal successors, (3287), 2667 states have internal predecessors, (3287), 625 states have call successors, (625), 258 states have call predecessors, (625), 297 states have return successors, (774), 626 states have call predecessors, (774), 624 states have call successors, (774) [2021-12-21 16:09:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3532 states to 3532 states and 4686 transitions. [2021-12-21 16:09:47,769 INFO L78 Accepts]: Start accepts. Automaton has 3532 states and 4686 transitions. Word has length 162 [2021-12-21 16:09:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:47,769 INFO L470 AbstractCegarLoop]: Abstraction has 3532 states and 4686 transitions. [2021-12-21 16:09:47,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:09:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3532 states and 4686 transitions. [2021-12-21 16:09:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-21 16:09:47,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:47,776 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:47,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 16:09:47,996 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,SelfDestructingSolverStorable9 [2021-12-21 16:09:47,997 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash 625799758, now seen corresponding path program 1 times [2021-12-21 16:09:47,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:47,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879823387] [2021-12-21 16:09:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:47,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:09:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:09:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 16:09:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:09:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:09:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:09:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 16:09:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 16:09:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 16:09:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:09:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:09:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 16:09:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-21 16:09:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 16:09:48,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:48,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879823387] [2021-12-21 16:09:48,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879823387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:09:48,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313647489] [2021-12-21 16:09:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:48,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:09:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:09:48,225 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) [2021-12-21 16:09:48,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 16:09:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 16:09:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:09:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 16:09:48,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:09:48,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313647489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:48,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:09:48,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-12-21 16:09:48,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698017665] [2021-12-21 16:09:48,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:48,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:09:48,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:09:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-21 16:09:48,933 INFO L87 Difference]: Start difference. First operand 3532 states and 4686 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:09:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:49,939 INFO L93 Difference]: Finished difference Result 14900 states and 20710 transitions. [2021-12-21 16:09:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 16:09:49,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 172 [2021-12-21 16:09:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:49,975 INFO L225 Difference]: With dead ends: 14900 [2021-12-21 16:09:49,975 INFO L226 Difference]: Without dead ends: 11384 [2021-12-21 16:09:49,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-12-21 16:09:49,987 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 1640 mSDsluCounter, 5450 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 7178 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:49,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1678 Valid, 7178 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 16:09:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11384 states. [2021-12-21 16:09:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11384 to 7096. [2021-12-21 16:09:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 5241 states have (on average 1.2577752337340202) internal successors, (6592), 5365 states have internal predecessors, (6592), 1261 states have call successors, (1261), 514 states have call predecessors, (1261), 593 states have return successors, (1560), 1256 states have call predecessors, (1560), 1260 states have call successors, (1560) [2021-12-21 16:09:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 9413 transitions. [2021-12-21 16:09:50,426 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 9413 transitions. Word has length 172 [2021-12-21 16:09:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:50,426 INFO L470 AbstractCegarLoop]: Abstraction has 7096 states and 9413 transitions. [2021-12-21 16:09:50,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:09:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 9413 transitions. [2021-12-21 16:09:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-21 16:09:50,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:50,438 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:50,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 16:09:50,660 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,SelfDestructingSolverStorable10 [2021-12-21 16:09:50,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -385317492, now seen corresponding path program 1 times [2021-12-21 16:09:50,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:50,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521596866] [2021-12-21 16:09:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:50,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:09:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:09:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 16:09:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:09:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:09:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:09:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 16:09:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 16:09:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 16:09:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:09:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:09:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 16:09:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-21 16:09:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 16:09:50,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521596866] [2021-12-21 16:09:50,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521596866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:09:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562750067] [2021-12-21 16:09:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:50,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:09:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:09:50,985 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) [2021-12-21 16:09:50,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 16:09:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 16:09:51,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:09:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 16:09:51,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 16:09:51,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 16:09:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:09:51,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:09:51,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562750067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:09:51,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:09:51,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2021-12-21 16:09:51,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489888389] [2021-12-21 16:09:51,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:09:51,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 16:09:51,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 16:09:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-21 16:09:51,783 INFO L87 Difference]: Start difference. First operand 7096 states and 9413 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 8 states have internal predecessors, (120), 2 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:09:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:09:54,486 INFO L93 Difference]: Finished difference Result 16712 states and 22395 transitions. [2021-12-21 16:09:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:09:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 8 states have internal predecessors, (120), 2 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 172 [2021-12-21 16:09:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:09:54,512 INFO L225 Difference]: With dead ends: 16712 [2021-12-21 16:09:54,513 INFO L226 Difference]: Without dead ends: 9632 [2021-12-21 16:09:54,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-12-21 16:09:54,530 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 669 mSDsluCounter, 4679 mSDsCounter, 0 mSdLazyCounter, 3437 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 5694 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:09:54,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 5694 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3437 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 16:09:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-12-21 16:09:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 8652. [2021-12-21 16:09:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8652 states, 6423 states have (on average 1.2665421142768176) internal successors, (8135), 6573 states have internal predecessors, (8135), 1497 states have call successors, (1497), 645 states have call predecessors, (1497), 731 states have return successors, (1863), 1473 states have call predecessors, (1863), 1496 states have call successors, (1863) [2021-12-21 16:09:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 11495 transitions. [2021-12-21 16:09:54,996 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 11495 transitions. Word has length 172 [2021-12-21 16:09:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:09:54,996 INFO L470 AbstractCegarLoop]: Abstraction has 8652 states and 11495 transitions. [2021-12-21 16:09:54,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 8 states have internal predecessors, (120), 2 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:09:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 11495 transitions. [2021-12-21 16:09:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 16:09:55,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:09:55,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:09:55,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 16:09:55,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:09:55,234 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:09:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:09:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1960940060, now seen corresponding path program 1 times [2021-12-21 16:09:55,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:09:55,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652472380] [2021-12-21 16:09:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:55,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:09:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:09:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:09:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:09:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:09:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:09:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:09:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 16:09:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:09:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 16:09:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:09:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 16:09:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:09:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 16:09:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:09:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:09:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-21 16:09:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 16:09:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 16:09:55,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:09:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652472380] [2021-12-21 16:09:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652472380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:09:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699654822] [2021-12-21 16:09:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:09:55,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:09:55,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:09:55,482 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) [2021-12-21 16:09:55,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 16:09:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:09:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-21 16:09:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:09:56,263 INFO L353 Elim1Store]: treesize reduction 81, result has 25.7 percent of original size [2021-12-21 16:09:56,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2021-12-21 16:09:56,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 16:09:56,589 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 16:09:56,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-21 16:09:56,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 16:09:56,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 16:09:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:09:56,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:09:57,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699654822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:09:57,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:09:57,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-12-21 16:09:57,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505202091] [2021-12-21 16:09:57,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:09:57,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 16:09:57,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:09:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 16:09:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-12-21 16:09:57,273 INFO L87 Difference]: Start difference. First operand 8652 states and 11495 transitions. Second operand has 22 states, 22 states have (on average 8.818181818181818) internal successors, (194), 15 states have internal predecessors, (194), 5 states have call successors, (37), 10 states have call predecessors, (37), 7 states have return successors, (36), 7 states have call predecessors, (36), 5 states have call successors, (36) [2021-12-21 16:10:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:01,780 INFO L93 Difference]: Finished difference Result 21557 states and 29035 transitions. [2021-12-21 16:10:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-21 16:10:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.818181818181818) internal successors, (194), 15 states have internal predecessors, (194), 5 states have call successors, (37), 10 states have call predecessors, (37), 7 states have return successors, (36), 7 states have call predecessors, (36), 5 states have call successors, (36) Word has length 178 [2021-12-21 16:10:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:01,821 INFO L225 Difference]: With dead ends: 21557 [2021-12-21 16:10:01,821 INFO L226 Difference]: Without dead ends: 13589 [2021-12-21 16:10:01,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=400, Invalid=2906, Unknown=0, NotChecked=0, Total=3306 [2021-12-21 16:10:01,848 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 2274 mSDsluCounter, 6841 mSDsCounter, 0 mSdLazyCounter, 6187 mSolverCounterSat, 1409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2310 SdHoareTripleChecker+Valid, 7580 SdHoareTripleChecker+Invalid, 7596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1409 IncrementalHoareTripleChecker+Valid, 6187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:01,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2310 Valid, 7580 Invalid, 7596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1409 Valid, 6187 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-21 16:10:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13589 states. [2021-12-21 16:10:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13589 to 10664. [2021-12-21 16:10:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10664 states, 7962 states have (on average 1.277945239889475) internal successors, (10175), 8147 states have internal predecessors, (10175), 1808 states have call successors, (1808), 811 states have call predecessors, (1808), 893 states have return successors, (2200), 1745 states have call predecessors, (2200), 1807 states have call successors, (2200) [2021-12-21 16:10:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 14183 transitions. [2021-12-21 16:10:02,500 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 14183 transitions. Word has length 178 [2021-12-21 16:10:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:02,501 INFO L470 AbstractCegarLoop]: Abstraction has 10664 states and 14183 transitions. [2021-12-21 16:10:02,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.818181818181818) internal successors, (194), 15 states have internal predecessors, (194), 5 states have call successors, (37), 10 states have call predecessors, (37), 7 states have return successors, (36), 7 states have call predecessors, (36), 5 states have call successors, (36) [2021-12-21 16:10:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 14183 transitions. [2021-12-21 16:10:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-21 16:10:02,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:02,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:02,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:02,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:02,732 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1411015937, now seen corresponding path program 1 times [2021-12-21 16:10:02,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295263382] [2021-12-21 16:10:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:02,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:10:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:10:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:10:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 16:10:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 16:10:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:10:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 16:10:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 16:10:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-21 16:10:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-21 16:10:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-21 16:10:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-21 16:10:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 16:10:02,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295263382] [2021-12-21 16:10:02,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295263382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707628265] [2021-12-21 16:10:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:02,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:02,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:03,000 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) [2021-12-21 16:10:03,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 16:10:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 16:10:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 16:10:03,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 16:10:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 16:10:03,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 16:10:03,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 16:10:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 16:10:03,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:04,199 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1112 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_1112) |c_ULTIMATE.start_#Ultimate.C_strcpy_src#1.base|) (+ |c_ULTIMATE.start_#Ultimate.C_strcpy_src#1.offset| |c_ULTIMATE.start_#Ultimate.C_strcpy_#t~offset383#1| 1)))) is different from false [2021-12-21 16:10:04,235 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13| Int)) (or (not (<= |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13| |c_ULTIMATE.start_alloc_etherdev_mqs_#res#1.base|)) (forall ((v_ArrVal_1112 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13| v_ArrVal_1112) 26) 1))))) is different from false [2021-12-21 16:10:04,248 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13| Int) (v_ArrVal_1112 (Array Int Int))) (or (< |c_ULTIMATE.start_alloc_etherdev_mqs_#t~ret347#1.base| |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13|) (< 0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13| v_ArrVal_1112) 26) 1)))) is different from false [2021-12-21 16:10:04,265 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13| Int) (v_ArrVal_1112 (Array Int Int))) (or (< 0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13| v_ArrVal_1112) 26) 1)) (< 0 |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_13|))) is different from false [2021-12-21 16:10:04,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707628265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:04,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:10:04,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-21 16:10:04,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430414011] [2021-12-21 16:10:04,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:04,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 16:10:04,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 16:10:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=537, Unknown=4, NotChecked=196, Total=812 [2021-12-21 16:10:04,268 INFO L87 Difference]: Start difference. First operand 10664 states and 14183 transitions. Second operand has 21 states, 21 states have (on average 9.380952380952381) internal successors, (197), 14 states have internal predecessors, (197), 3 states have call successors, (37), 9 states have call predecessors, (37), 6 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) [2021-12-21 16:10:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:09,618 INFO L93 Difference]: Finished difference Result 21451 states and 29179 transitions. [2021-12-21 16:10:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 16:10:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.380952380952381) internal successors, (197), 14 states have internal predecessors, (197), 3 states have call successors, (37), 9 states have call predecessors, (37), 6 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) Word has length 180 [2021-12-21 16:10:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:09,678 INFO L225 Difference]: With dead ends: 21451 [2021-12-21 16:10:09,678 INFO L226 Difference]: Without dead ends: 14327 [2021-12-21 16:10:09,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1105, Unknown=4, NotChecked=284, Total=1560 [2021-12-21 16:10:09,703 INFO L933 BasicCegarLoop]: 1187 mSDtfsCounter, 1677 mSDsluCounter, 12394 mSDsCounter, 0 mSdLazyCounter, 7108 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 13581 SdHoareTripleChecker+Invalid, 7987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 7108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:09,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 13581 Invalid, 7987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 7108 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-21 16:10:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14327 states. [2021-12-21 16:10:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14327 to 10672. [2021-12-21 16:10:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10672 states, 7970 states have (on average 1.2774153074027603) internal successors, (10181), 8151 states have internal predecessors, (10181), 1808 states have call successors, (1808), 811 states have call predecessors, (1808), 893 states have return successors, (2200), 1749 states have call predecessors, (2200), 1807 states have call successors, (2200) [2021-12-21 16:10:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 14189 transitions. [2021-12-21 16:10:10,320 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 14189 transitions. Word has length 180 [2021-12-21 16:10:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 10672 states and 14189 transitions. [2021-12-21 16:10:10,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.380952380952381) internal successors, (197), 14 states have internal predecessors, (197), 3 states have call successors, (37), 9 states have call predecessors, (37), 6 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) [2021-12-21 16:10:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 14189 transitions. [2021-12-21 16:10:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-21 16:10:10,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:10,420 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:10,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 16:10:10,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 16:10:10,635 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1457104041, now seen corresponding path program 2 times [2021-12-21 16:10:10,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:10,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297397247] [2021-12-21 16:10:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:10,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:10:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:10:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:10:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 16:10:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 16:10:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 16:10:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 16:10:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:10:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:10:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:10:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-21 16:10:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-21 16:10:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 16:10:10,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297397247] [2021-12-21 16:10:10,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297397247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741048531] [2021-12-21 16:10:10,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:10:10,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:10,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:10,926 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) [2021-12-21 16:10:10,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 16:10:11,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 16:10:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:10:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-21 16:10:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:11,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-12-21 16:10:11,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-21 16:10:11,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 16:10:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 16:10:11,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:13,094 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ipheth_probe_~netdev~0#1.base| Int) (v_ArrVal_1320 Int) (v_ArrVal_1316 Int) (v_ArrVal_1317 Int)) (< 0 (select (select (store |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base| (store (store (store (select |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base|) (+ 420 |c_ULTIMATE.start_ipheth_probe_~netdev~0#1.offset|) v_ArrVal_1317) (+ 930 |c_ULTIMATE.start_ipheth_probe_~netdev~0#1.offset|) v_ArrVal_1316) |c_ULTIMATE.start_ipheth_probe_~netdev~0#1.offset| v_ArrVal_1320)) 26) 1))) is different from false [2021-12-21 16:10:13,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ipheth_probe_~netdev~0#1.base| Int) (v_ArrVal_1320 Int) (v_ArrVal_1316 Int) (v_ArrVal_1317 Int)) (< 0 (select (select (store |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base| (store (store (store (select |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base|) (+ |c_ULTIMATE.start_alloc_etherdev_mqs_#res#1.offset| 420) v_ArrVal_1317) (+ |c_ULTIMATE.start_alloc_etherdev_mqs_#res#1.offset| 930) v_ArrVal_1316) |c_ULTIMATE.start_alloc_etherdev_mqs_#res#1.offset| v_ArrVal_1320)) 26) 1))) is different from false [2021-12-21 16:10:14,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ipheth_probe_~netdev~0#1.base| Int) (v_ArrVal_1320 Int) (v_ArrVal_1316 Int) (v_ArrVal_1317 Int)) (< 0 (select (select (store |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base| (store (store (store (select |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base|) (+ |c_ULTIMATE.start_alloc_etherdev_mqs_#t~ret347#1.offset| 420) v_ArrVal_1317) (+ |c_ULTIMATE.start_alloc_etherdev_mqs_#t~ret347#1.offset| 930) v_ArrVal_1316) |c_ULTIMATE.start_alloc_etherdev_mqs_#t~ret347#1.offset| v_ArrVal_1320)) 26) 1))) is different from false [2021-12-21 16:10:15,478 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ipheth_probe_~netdev~0#1.base| Int) (v_ArrVal_1320 Int) (v_ArrVal_1316 Int) (v_ArrVal_1317 Int)) (< 0 (select (select (store |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base| (store (store (store (select |c_#memory_int| |ULTIMATE.start_ipheth_probe_~netdev~0#1.base|) 420 v_ArrVal_1317) 930 v_ArrVal_1316) 0 v_ArrVal_1320)) 26) 1))) is different from false [2021-12-21 16:10:15,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741048531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:15,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:10:15,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-12-21 16:10:15,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655788048] [2021-12-21 16:10:15,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:15,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 16:10:15,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 16:10:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=685, Unknown=4, NotChecked=220, Total=992 [2021-12-21 16:10:15,486 INFO L87 Difference]: Start difference. First operand 10672 states and 14189 transitions. Second operand has 22 states, 22 states have (on average 9.227272727272727) internal successors, (203), 15 states have internal predecessors, (203), 4 states have call successors, (38), 9 states have call predecessors, (38), 6 states have return successors, (37), 6 states have call predecessors, (37), 4 states have call successors, (37) [2021-12-21 16:10:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:20,927 INFO L93 Difference]: Finished difference Result 21705 states and 29574 transitions. [2021-12-21 16:10:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 16:10:20,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 9.227272727272727) internal successors, (203), 15 states have internal predecessors, (203), 4 states have call successors, (38), 9 states have call predecessors, (38), 6 states have return successors, (37), 6 states have call predecessors, (37), 4 states have call successors, (37) Word has length 186 [2021-12-21 16:10:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:21,010 INFO L225 Difference]: With dead ends: 21705 [2021-12-21 16:10:21,010 INFO L226 Difference]: Without dead ends: 14577 [2021-12-21 16:10:21,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=214, Invalid=1604, Unknown=4, NotChecked=340, Total=2162 [2021-12-21 16:10:21,030 INFO L933 BasicCegarLoop]: 1231 mSDtfsCounter, 1578 mSDsluCounter, 14410 mSDsCounter, 0 mSdLazyCounter, 8124 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 15641 SdHoareTripleChecker+Invalid, 8787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 8124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:21,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 15641 Invalid, 8787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 8124 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-21 16:10:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14577 states. [2021-12-21 16:10:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14577 to 11553. [2021-12-21 16:10:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11553 states, 8645 states have (on average 1.2766917293233082) internal successors, (11037), 8832 states have internal predecessors, (11037), 1938 states have call successors, (1938), 886 states have call predecessors, (1938), 969 states have return successors, (2344), 1874 states have call predecessors, (2344), 1937 states have call successors, (2344) [2021-12-21 16:10:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11553 states to 11553 states and 15319 transitions. [2021-12-21 16:10:21,728 INFO L78 Accepts]: Start accepts. Automaton has 11553 states and 15319 transitions. Word has length 186 [2021-12-21 16:10:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:21,728 INFO L470 AbstractCegarLoop]: Abstraction has 11553 states and 15319 transitions. [2021-12-21 16:10:21,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.227272727272727) internal successors, (203), 15 states have internal predecessors, (203), 4 states have call successors, (38), 9 states have call predecessors, (38), 6 states have return successors, (37), 6 states have call predecessors, (37), 4 states have call successors, (37) [2021-12-21 16:10:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 11553 states and 15319 transitions. [2021-12-21 16:10:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-21 16:10:21,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:21,754 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:21,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:21,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 16:10:21,968 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1275845430, now seen corresponding path program 3 times [2021-12-21 16:10:21,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791712008] [2021-12-21 16:10:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:21,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:10:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:10:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:10:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:10:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 16:10:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 16:10:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:10:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:10:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 16:10:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 16:10:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-21 16:10:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-21 16:10:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 16:10:22,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791712008] [2021-12-21 16:10:22,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791712008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:22,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:22,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:10:22,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781645321] [2021-12-21 16:10:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:22,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:10:22,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:22,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:10:22,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:22,229 INFO L87 Difference]: Start difference. First operand 11553 states and 15319 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (19), 7 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 16:10:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:24,087 INFO L93 Difference]: Finished difference Result 22019 states and 30032 transitions. [2021-12-21 16:10:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (19), 7 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 194 [2021-12-21 16:10:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:24,174 INFO L225 Difference]: With dead ends: 22019 [2021-12-21 16:10:24,175 INFO L226 Difference]: Without dead ends: 14867 [2021-12-21 16:10:24,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:10:24,194 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 901 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:24,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 2739 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 16:10:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14867 states. [2021-12-21 16:10:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14867 to 11537. [2021-12-21 16:10:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 8637 states have (on average 1.2760217668171818) internal successors, (11021), 8824 states have internal predecessors, (11021), 1930 states have call successors, (1930), 886 states have call predecessors, (1930), 969 states have return successors, (2332), 1866 states have call predecessors, (2332), 1929 states have call successors, (2332) [2021-12-21 16:10:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 15283 transitions. [2021-12-21 16:10:24,857 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 15283 transitions. Word has length 194 [2021-12-21 16:10:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:24,858 INFO L470 AbstractCegarLoop]: Abstraction has 11537 states and 15283 transitions. [2021-12-21 16:10:24,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (19), 7 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 16:10:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 15283 transitions. [2021-12-21 16:10:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-21 16:10:24,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:24,876 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:24,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 16:10:24,876 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash -276664566, now seen corresponding path program 1 times [2021-12-21 16:10:24,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:24,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607037348] [2021-12-21 16:10:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:24,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:24,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:24,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:24,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:10:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:24,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:10:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:24,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:10:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:10:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 16:10:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 16:10:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:10:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:10:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 16:10:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 16:10:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:10:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-21 16:10:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-21 16:10:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 16:10:25,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:25,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607037348] [2021-12-21 16:10:25,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607037348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:25,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:25,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 16:10:25,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145778041] [2021-12-21 16:10:25,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:25,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 16:10:25,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 16:10:25,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:10:25,172 INFO L87 Difference]: Start difference. First operand 11537 states and 15283 transitions. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (19), 7 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-21 16:10:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:26,808 INFO L93 Difference]: Finished difference Result 19701 states and 26376 transitions. [2021-12-21 16:10:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:10:26,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (19), 7 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 194 [2021-12-21 16:10:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:26,880 INFO L225 Difference]: With dead ends: 19701 [2021-12-21 16:10:26,881 INFO L226 Difference]: Without dead ends: 12565 [2021-12-21 16:10:26,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-21 16:10:26,931 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 858 mSDsluCounter, 2019 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:26,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 2602 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:10:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12565 states. [2021-12-21 16:10:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12565 to 11557. [2021-12-21 16:10:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11557 states, 8653 states have (on average 1.2755113833352594) internal successors, (11037), 8836 states have internal predecessors, (11037), 1934 states have call successors, (1934), 886 states have call predecessors, (1934), 969 states have return successors, (2336), 1874 states have call predecessors, (2336), 1933 states have call successors, (2336) [2021-12-21 16:10:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11557 states to 11557 states and 15307 transitions. [2021-12-21 16:10:27,656 INFO L78 Accepts]: Start accepts. Automaton has 11557 states and 15307 transitions. Word has length 194 [2021-12-21 16:10:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:27,657 INFO L470 AbstractCegarLoop]: Abstraction has 11557 states and 15307 transitions. [2021-12-21 16:10:27,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (19), 7 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-21 16:10:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 11557 states and 15307 transitions. [2021-12-21 16:10:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-21 16:10:27,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:27,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:27,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 16:10:27,680 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash 454006962, now seen corresponding path program 2 times [2021-12-21 16:10:27,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014285693] [2021-12-21 16:10:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:27,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:10:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:10:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:10:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:10:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:10:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 16:10:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 16:10:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:10:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:10:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 16:10:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 16:10:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:10:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-21 16:10:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-21 16:10:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 16:10:28,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:28,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014285693] [2021-12-21 16:10:28,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014285693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:28,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051131540] [2021-12-21 16:10:28,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:10:28,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:28,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:28,004 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) [2021-12-21 16:10:28,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 16:10:28,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 16:10:28,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:10:28,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2249 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-21 16:10:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:28,910 INFO L353 Elim1Store]: treesize reduction 85, result has 27.4 percent of original size [2021-12-21 16:10:28,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 43 [2021-12-21 16:10:29,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 16:10:29,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 52 [2021-12-21 16:10:29,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-21 16:10:29,539 INFO L353 Elim1Store]: treesize reduction 46, result has 53.1 percent of original size [2021-12-21 16:10:29,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 57 treesize of output 95 [2021-12-21 16:10:31,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 16:10:31,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 52 [2021-12-21 16:10:31,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 16:10:31,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 16:10:31,705 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-12-21 16:10:31,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 63 [2021-12-21 16:10:31,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 16:10:31,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 16:10:31,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 16:10:31,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 16:10:32,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 16:10:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-21 16:10:32,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:32,427 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1788 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_1788) |c_ULTIMATE.start_#Ultimate.C_strcpy_src#1.base|) (+ |c_ULTIMATE.start_#Ultimate.C_strcpy_src#1.offset| |c_ULTIMATE.start_#Ultimate.C_strcpy_#t~offset383#1| 1)))) is different from false [2021-12-21 16:10:32,432 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1788 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_1788) |c_ULTIMATE.start_#Ultimate.C_strcpy_src#1.base|) (+ 2 |c_ULTIMATE.start_#Ultimate.C_strcpy_src#1.offset| |c_ULTIMATE.start_#Ultimate.C_strcpy_#t~offset383#1|)))) is different from false [2021-12-21 16:10:32,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051131540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:32,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:10:32,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 28 [2021-12-21 16:10:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442382311] [2021-12-21 16:10:32,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:32,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 16:10:32,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 16:10:32,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1080, Unknown=7, NotChecked=134, Total=1332 [2021-12-21 16:10:32,607 INFO L87 Difference]: Start difference. First operand 11557 states and 15307 transitions. Second operand has 28 states, 28 states have (on average 7.75) internal successors, (217), 21 states have internal predecessors, (217), 6 states have call successors, (39), 10 states have call predecessors, (39), 7 states have return successors, (38), 8 states have call predecessors, (38), 6 states have call successors, (38)