./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 e19ca921 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-e19ca92 [2021-12-22 14:36:01,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:36:01,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:36:01,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:36:01,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:36:01,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:36:01,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:36:01,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:36:01,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:36:01,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:36:01,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:36:01,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:36:01,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:36:01,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:36:01,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:36:01,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:36:01,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:36:01,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:36:01,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:36:01,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:36:01,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:36:01,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:36:01,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:36:01,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:36:01,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:36:01,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:36:01,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:36:01,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:36:01,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:36:01,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:36:01,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:36:01,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:36:01,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:36:01,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:36:01,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:36:01,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:36:01,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:36:01,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:36:01,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:36:01,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:36:01,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:36:01,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:36:01,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:36:01,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:36:01,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:36:01,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:36:01,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:36:01,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:36:01,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:36:01,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:36:01,456 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:36:01,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:36:01,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:36:01,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:36:01,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:36:01,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:36:01,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:36:01,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:36:01,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:36:01,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:36:01,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:36:01,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:36:01,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:36:01,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:36:01,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:36:01,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:36:01,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:36:01,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:36:01,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:36:01,472 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:36:01,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:36:01,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:36:01,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:36:01,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 [2021-12-22 14:36:01,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:36:01,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:36:01,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:36:01,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:36:01,672 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:36:01,673 INFO L432 ainManager$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 [2021-12-22 14:36:01,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de95be05/3c0dc68d96c141c48a6e5f8f70b0d5d2/FLAG95f2d86dc [2021-12-22 14:36:02,216 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:36:02,217 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 [2021-12-22 14:36:02,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de95be05/3c0dc68d96c141c48a6e5f8f70b0d5d2/FLAG95f2d86dc [2021-12-22 14:36:02,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de95be05/3c0dc68d96c141c48a6e5f8f70b0d5d2 [2021-12-22 14:36:02,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:36:02,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:36:02,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:36:02,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:36:02,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:36:02,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:36:02" (1/1) ... [2021-12-22 14:36:02,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5250c223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:02, skipping insertion in model container [2021-12-22 14:36:02,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:36:02" (1/1) ... [2021-12-22 14:36:02,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:36:02,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:36:03,010 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] [2021-12-22 14:36:03,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:36:03,372 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:36:03,529 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] [2021-12-22 14:36:03,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:36:03,660 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:36:03,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03 WrapperNode [2021-12-22 14:36:03,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:36:03,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:36:03,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:36:03,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:36:03,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,763 INFO L137 Inliner]: procedures = 165, calls = 691, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 1770 [2021-12-22 14:36:03,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:36:03,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:36:03,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:36:03,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:36:03,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:36:03,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:36:03,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:36:03,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:36:03,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (1/1) ... [2021-12-22 14:36:03,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:36:03,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:03,912 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) [2021-12-22 14:36:03,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_12 [2021-12-22 14:36:03,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_12 [2021-12-22 14:36:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:36:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_8 [2021-12-22 14:36:03,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_8 [2021-12-22 14:36:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rx_submit [2021-12-22 14:36:03,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rx_submit [2021-12-22 14:36:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_9 [2021-12-22 14:36:03,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_9 [2021-12-22 14:36:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:36:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:36:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 14:36:03,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 14:36:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:36:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-12-22 14:36:03,956 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-12-22 14:36:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-12-22 14:36:03,956 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-12-22 14:36:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rcvbulk_callback [2021-12-22 14:36:03,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rcvbulk_callback [2021-12-22 14:36:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-12-22 14:36:03,957 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-12-22 14:36:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-22 14:36:03,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-22 14:36:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:36:03,957 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:36:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-22 14:36:03,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-22 14:36:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:36:03,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:36:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-22 14:36:03,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-22 14:36:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-22 14:36:03,958 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-22 14:36:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:36:03,958 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:36:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_disconnect [2021-12-22 14:36:03,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_disconnect [2021-12-22 14:36:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_tx_timeout [2021-12-22 14:36:03,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_tx_timeout [2021-12-22 14:36:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:36:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:36:03,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:36:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:36:03,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:36:03,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:36:03,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:36:03,960 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_carrier_set [2021-12-22 14:36:03,951 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 [2021-12-22 14:36:03,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_carrier_set [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-22 14:36:03,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-22 14:36:03,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-22 14:36:03,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_free_urbs [2021-12-22 14:36:03,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_free_urbs [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:36:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-22 14:36:03,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-22 14:36:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:36:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_relative [2021-12-22 14:36:03,963 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_relative [2021-12-22 14:36:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:36:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-22 14:36:03,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-22 14:36:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-12-22 14:36:03,963 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-12-22 14:36:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:36:03,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:36:04,286 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:36:04,288 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:36:04,443 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 14:36:04,816 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-22 14:36:05,203 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:36:05,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:36:05,216 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 14:36:05,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:36:05 BoogieIcfgContainer [2021-12-22 14:36:05,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:36:05,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:36:05,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:36:05,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:36:05,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:36:02" (1/3) ... [2021-12-22 14:36:05,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d3e777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:36:05, skipping insertion in model container [2021-12-22 14:36:05,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:36:03" (2/3) ... [2021-12-22 14:36:05,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d3e777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:36:05, skipping insertion in model container [2021-12-22 14:36:05,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:36:05" (3/3) ... [2021-12-22 14:36:05,225 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-12-22 14:36:05,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:36:05,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:36:05,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:36:05,275 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 [2021-12-22 14:36:05,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:36:05,333 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) [2021-12-22 14:36:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 14:36:05,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:05,341 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] [2021-12-22 14:36:05,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash -60987296, now seen corresponding path program 1 times [2021-12-22 14:36:05,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:05,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022280571] [2021-12-22 14:36:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:05,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:05,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:05,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:05,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:36:05,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022280571] [2021-12-22 14:36:05,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022280571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:05,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:05,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:36:05,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907050298] [2021-12-22 14:36:05,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:05,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:36:05,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:05,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:36:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:36:05,778 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) [2021-12-22 14:36:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:06,787 INFO L93 Difference]: Finished difference Result 1626 states and 2252 transitions. [2021-12-22 14:36:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:36:06,789 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 [2021-12-22 14:36:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:06,810 INFO L225 Difference]: With dead ends: 1626 [2021-12-22 14:36:06,810 INFO L226 Difference]: Without dead ends: 1080 [2021-12-22 14:36:06,821 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 [2021-12-22 14:36:06,824 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 966 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:06,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 1535 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 14:36:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-12-22 14:36:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 992. [2021-12-22 14:36:06,930 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) [2021-12-22 14:36:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1307 transitions. [2021-12-22 14:36:06,936 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1307 transitions. Word has length 34 [2021-12-22 14:36:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:06,937 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1307 transitions. [2021-12-22 14:36:06,937 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) [2021-12-22 14:36:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1307 transitions. [2021-12-22 14:36:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 14:36:06,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:06,945 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] [2021-12-22 14:36:06,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:36:06,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash -406405667, now seen corresponding path program 1 times [2021-12-22 14:36:06,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:06,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25087829] [2021-12-22 14:36:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:06,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:07,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:07,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25087829] [2021-12-22 14:36:07,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25087829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:07,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:07,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:36:07,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877276473] [2021-12-22 14:36:07,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:07,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:36:07,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:36:07,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:36:07,072 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) [2021-12-22 14:36:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:07,569 INFO L93 Difference]: Finished difference Result 1106 states and 1483 transitions. [2021-12-22 14:36:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:36:07,570 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 [2021-12-22 14:36:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:07,576 INFO L225 Difference]: With dead ends: 1106 [2021-12-22 14:36:07,576 INFO L226 Difference]: Without dead ends: 1093 [2021-12-22 14:36:07,578 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 [2021-12-22 14:36:07,580 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:07,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 935 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 14:36:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-12-22 14:36:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 992. [2021-12-22 14:36:07,604 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) [2021-12-22 14:36:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1306 transitions. [2021-12-22 14:36:07,607 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1306 transitions. Word has length 44 [2021-12-22 14:36:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:07,607 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1306 transitions. [2021-12-22 14:36:07,607 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) [2021-12-22 14:36:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1306 transitions. [2021-12-22 14:36:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 14:36:07,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:07,609 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] [2021-12-22 14:36:07,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:36:07,609 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -349147365, now seen corresponding path program 1 times [2021-12-22 14:36:07,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:07,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102462558] [2021-12-22 14:36:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:07,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:07,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:07,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102462558] [2021-12-22 14:36:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102462558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:07,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:07,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:36:07,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853171351] [2021-12-22 14:36:07,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:07,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:36:07,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:36:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:36:07,705 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) [2021-12-22 14:36:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:08,685 INFO L93 Difference]: Finished difference Result 3133 states and 4280 transitions. [2021-12-22 14:36:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:36:08,686 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 [2021-12-22 14:36:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:08,695 INFO L225 Difference]: With dead ends: 3133 [2021-12-22 14:36:08,695 INFO L226 Difference]: Without dead ends: 2150 [2021-12-22 14:36:08,698 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 [2021-12-22 14:36:08,699 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 969 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:08,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1551 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 14:36:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-22 14:36:08,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2000. [2021-12-22 14:36:08,791 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) [2021-12-22 14:36:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2670 transitions. [2021-12-22 14:36:08,801 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2670 transitions. Word has length 44 [2021-12-22 14:36:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:08,801 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 2670 transitions. [2021-12-22 14:36:08,801 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) [2021-12-22 14:36:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2670 transitions. [2021-12-22 14:36:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 14:36:08,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:08,803 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] [2021-12-22 14:36:08,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:36:08,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2061086592, now seen corresponding path program 1 times [2021-12-22 14:36:08,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:08,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782987054] [2021-12-22 14:36:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:08,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:08,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:08,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782987054] [2021-12-22 14:36:08,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782987054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:08,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:08,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:36:08,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089733663] [2021-12-22 14:36:08,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:08,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:36:08,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:36:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:36:08,904 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) [2021-12-22 14:36:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:09,393 INFO L93 Difference]: Finished difference Result 2142 states and 2912 transitions. [2021-12-22 14:36:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:36:09,394 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 [2021-12-22 14:36:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:09,402 INFO L225 Difference]: With dead ends: 2142 [2021-12-22 14:36:09,402 INFO L226 Difference]: Without dead ends: 2139 [2021-12-22 14:36:09,403 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 [2021-12-22 14:36:09,403 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 [2021-12-22 14:36:09,403 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] [2021-12-22 14:36:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-12-22 14:36:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1999. [2021-12-22 14:36:09,451 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) [2021-12-22 14:36:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 2668 transitions. [2021-12-22 14:36:09,459 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 2668 transitions. Word has length 45 [2021-12-22 14:36:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:09,459 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 2668 transitions. [2021-12-22 14:36:09,459 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) [2021-12-22 14:36:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 2668 transitions. [2021-12-22 14:36:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 14:36:09,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:09,460 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] [2021-12-22 14:36:09,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:36:09,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash -531067202, now seen corresponding path program 1 times [2021-12-22 14:36:09,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:09,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620311945] [2021-12-22 14:36:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:09,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:09,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:09,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:09,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:09,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620311945] [2021-12-22 14:36:09,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620311945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:09,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:09,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:36:09,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462937280] [2021-12-22 14:36:09,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:09,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:36:09,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:36:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:36:09,544 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) [2021-12-22 14:36:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:10,012 INFO L93 Difference]: Finished difference Result 2141 states and 2910 transitions. [2021-12-22 14:36:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:36:10,013 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 [2021-12-22 14:36:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:10,021 INFO L225 Difference]: With dead ends: 2141 [2021-12-22 14:36:10,021 INFO L226 Difference]: Without dead ends: 2138 [2021-12-22 14:36:10,023 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 [2021-12-22 14:36:10,023 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 773 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2021-12-22 14:36:10,024 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] [2021-12-22 14:36:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-12-22 14:36:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1998. [2021-12-22 14:36:10,073 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) [2021-12-22 14:36:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 2666 transitions. [2021-12-22 14:36:10,081 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 2666 transitions. Word has length 46 [2021-12-22 14:36:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:10,081 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 2666 transitions. [2021-12-22 14:36:10,081 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) [2021-12-22 14:36:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 2666 transitions. [2021-12-22 14:36:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 14:36:10,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:10,083 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] [2021-12-22 14:36:10,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:36:10,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash 716548675, now seen corresponding path program 1 times [2021-12-22 14:36:10,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:10,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879278144] [2021-12-22 14:36:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:10,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:10,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879278144] [2021-12-22 14:36:10,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879278144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:10,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:10,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:36:10,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755871218] [2021-12-22 14:36:10,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:10,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:36:10,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:36:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:36:10,200 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) [2021-12-22 14:36:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:10,663 INFO L93 Difference]: Finished difference Result 2140 states and 2908 transitions. [2021-12-22 14:36:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:36:10,664 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 [2021-12-22 14:36:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:10,672 INFO L225 Difference]: With dead ends: 2140 [2021-12-22 14:36:10,672 INFO L226 Difference]: Without dead ends: 2137 [2021-12-22 14:36:10,673 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 [2021-12-22 14:36:10,673 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 770 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:10,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 886 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 14:36:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-12-22 14:36:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1997. [2021-12-22 14:36:10,721 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) [2021-12-22 14:36:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 2664 transitions. [2021-12-22 14:36:10,728 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 2664 transitions. Word has length 47 [2021-12-22 14:36:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:10,728 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 2664 transitions. [2021-12-22 14:36:10,728 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) [2021-12-22 14:36:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 2664 transitions. [2021-12-22 14:36:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 14:36:10,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:10,729 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] [2021-12-22 14:36:10,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 14:36:10,730 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 737940065, now seen corresponding path program 1 times [2021-12-22 14:36:10,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:10,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568172229] [2021-12-22 14:36:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:10,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:36:10,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568172229] [2021-12-22 14:36:10,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568172229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:10,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:10,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:36:10,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211717329] [2021-12-22 14:36:10,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:10,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:36:10,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:36:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:36:10,824 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) [2021-12-22 14:36:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:11,251 INFO L93 Difference]: Finished difference Result 2139 states and 2906 transitions. [2021-12-22 14:36:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:36:11,251 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 [2021-12-22 14:36:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:11,258 INFO L225 Difference]: With dead ends: 2139 [2021-12-22 14:36:11,259 INFO L226 Difference]: Without dead ends: 2127 [2021-12-22 14:36:11,259 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 [2021-12-22 14:36:11,260 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 767 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:11,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 883 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 14:36:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-12-22 14:36:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1987. [2021-12-22 14:36:11,309 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) [2021-12-22 14:36:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2651 transitions. [2021-12-22 14:36:11,314 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2651 transitions. Word has length 48 [2021-12-22 14:36:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:11,315 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 2651 transitions. [2021-12-22 14:36:11,315 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) [2021-12-22 14:36:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2651 transitions. [2021-12-22 14:36:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-22 14:36:11,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:11,319 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] [2021-12-22 14:36:11,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 14:36:11,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1153772682, now seen corresponding path program 1 times [2021-12-22 14:36:11,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:11,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826452043] [2021-12-22 14:36:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:11,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:36:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 14:36:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 14:36:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:36:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 14:36:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 14:36:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 14:36:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 14:36:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 14:36:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 14:36:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-22 14:36:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 14:36:11,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:11,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826452043] [2021-12-22 14:36:11,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826452043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:11,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:11,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:36:11,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319106114] [2021-12-22 14:36:11,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:11,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:36:11,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:36:11,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:36:11,476 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) [2021-12-22 14:36:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:12,558 INFO L93 Difference]: Finished difference Result 5900 states and 7924 transitions. [2021-12-22 14:36:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:36:12,559 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 [2021-12-22 14:36:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:12,572 INFO L225 Difference]: With dead ends: 5900 [2021-12-22 14:36:12,572 INFO L226 Difference]: Without dead ends: 3922 [2021-12-22 14:36:12,577 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 [2021-12-22 14:36:12,577 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 1540 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:12,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 1837 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 14:36:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2021-12-22 14:36:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 3516. [2021-12-22 14:36:12,672 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) [2021-12-22 14:36:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 3516 states and 4670 transitions. [2021-12-22 14:36:12,681 INFO L78 Accepts]: Start accepts. Automaton has 3516 states and 4670 transitions. Word has length 153 [2021-12-22 14:36:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:12,681 INFO L470 AbstractCegarLoop]: Abstraction has 3516 states and 4670 transitions. [2021-12-22 14:36:12,682 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) [2021-12-22 14:36:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3516 states and 4670 transitions. [2021-12-22 14:36:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 14:36:12,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:12,690 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] [2021-12-22 14:36:12,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 14:36:12,690 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash 425318257, now seen corresponding path program 1 times [2021-12-22 14:36:12,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133332315] [2021-12-22 14:36:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:12,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:36:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:36:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 14:36:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 14:36:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 14:36:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 14:36:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-22 14:36:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-22 14:36:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 14:36:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 14:36:12,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133332315] [2021-12-22 14:36:12,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133332315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:12,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:12,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:36:12,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541428765] [2021-12-22 14:36:12,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:12,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:36:12,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:36:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:36:12,899 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) [2021-12-22 14:36:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:13,616 INFO L93 Difference]: Finished difference Result 7416 states and 9930 transitions. [2021-12-22 14:36:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:36:13,616 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 [2021-12-22 14:36:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:13,629 INFO L225 Difference]: With dead ends: 7416 [2021-12-22 14:36:13,630 INFO L226 Difference]: Without dead ends: 3916 [2021-12-22 14:36:13,637 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 [2021-12-22 14:36:13,638 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 [2021-12-22 14:36:13,638 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] [2021-12-22 14:36:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-12-22 14:36:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3520. [2021-12-22 14:36:13,735 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) [2021-12-22 14:36:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 4674 transitions. [2021-12-22 14:36:13,742 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 4674 transitions. Word has length 162 [2021-12-22 14:36:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:13,743 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 4674 transitions. [2021-12-22 14:36:13,743 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) [2021-12-22 14:36:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 4674 transitions. [2021-12-22 14:36:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 14:36:13,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:13,749 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] [2021-12-22 14:36:13,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 14:36:13,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:13,750 INFO L85 PathProgramCache]: Analyzing trace with hash -632519821, now seen corresponding path program 1 times [2021-12-22 14:36:13,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:13,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104968080] [2021-12-22 14:36:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:13,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:36:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:36:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 14:36:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 14:36:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 14:36:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 14:36:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-22 14:36:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-22 14:36:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 14:36:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 14:36:13,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:13,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104968080] [2021-12-22 14:36:13,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104968080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:13,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51826241] [2021-12-22 14:36:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:13,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:36:13,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:13,984 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) [2021-12-22 14:36:14,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:36:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:36:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:36:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-22 14:36:14,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:36:14,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51826241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:14,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:36:14,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-22 14:36:14,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610213842] [2021-12-22 14:36:14,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:14,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:36:14,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:36:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-22 14:36:14,689 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) [2021-12-22 14:36:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:14,962 INFO L93 Difference]: Finished difference Result 9962 states and 13915 transitions. [2021-12-22 14:36:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:36:14,963 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 [2021-12-22 14:36:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:14,988 INFO L225 Difference]: With dead ends: 9962 [2021-12-22 14:36:14,988 INFO L226 Difference]: Without dead ends: 6458 [2021-12-22 14:36:14,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:36:14,999 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 [2021-12-22 14:36:15,000 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] [2021-12-22 14:36:15,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2021-12-22 14:36:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 3532. [2021-12-22 14:36:15,164 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) [2021-12-22 14:36:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3532 states to 3532 states and 4686 transitions. [2021-12-22 14:36:15,172 INFO L78 Accepts]: Start accepts. Automaton has 3532 states and 4686 transitions. Word has length 162 [2021-12-22 14:36:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:15,172 INFO L470 AbstractCegarLoop]: Abstraction has 3532 states and 4686 transitions. [2021-12-22 14:36:15,173 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) [2021-12-22 14:36:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3532 states and 4686 transitions. [2021-12-22 14:36:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-22 14:36:15,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:15,179 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] [2021-12-22 14:36:15,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 14:36:15,395 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 [2021-12-22 14:36:15,396 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash 625799758, now seen corresponding path program 1 times [2021-12-22 14:36:15,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:15,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8101695] [2021-12-22 14:36:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:15,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:36:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:36:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 14:36:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 14:36:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 14:36:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 14:36:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:36:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 14:36:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 14:36:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-22 14:36:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 14:36:15,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8101695] [2021-12-22 14:36:15,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8101695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139319501] [2021-12-22 14:36:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:15,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:36:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:15,678 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) [2021-12-22 14:36:15,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:36:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:16,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 14:36:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:36:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 14:36:16,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:36:16,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139319501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:16,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:36:16,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-12-22 14:36:16,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665942274] [2021-12-22 14:36:16,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:16,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:36:16,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:36:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:36:16,435 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) [2021-12-22 14:36:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:17,296 INFO L93 Difference]: Finished difference Result 14900 states and 20710 transitions. [2021-12-22 14:36:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 14:36:17,296 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 [2021-12-22 14:36:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:17,327 INFO L225 Difference]: With dead ends: 14900 [2021-12-22 14:36:17,328 INFO L226 Difference]: Without dead ends: 11384 [2021-12-22 14:36:17,337 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 [2021-12-22 14:36:17,338 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 [2021-12-22 14:36:17,338 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] [2021-12-22 14:36:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11384 states. [2021-12-22 14:36:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11384 to 7096. [2021-12-22 14:36:17,740 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) [2021-12-22 14:36:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 9413 transitions. [2021-12-22 14:36:17,789 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 9413 transitions. Word has length 172 [2021-12-22 14:36:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:17,789 INFO L470 AbstractCegarLoop]: Abstraction has 7096 states and 9413 transitions. [2021-12-22 14:36:17,789 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) [2021-12-22 14:36:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 9413 transitions. [2021-12-22 14:36:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-22 14:36:17,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:17,802 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] [2021-12-22 14:36:17,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 14:36:18,037 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 [2021-12-22 14:36:18,038 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash -385317492, now seen corresponding path program 1 times [2021-12-22 14:36:18,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:18,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083038951] [2021-12-22 14:36:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:18,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:36:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:36:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 14:36:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 14:36:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 14:36:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 14:36:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:36:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 14:36:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 14:36:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-22 14:36:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-22 14:36:18,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:18,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083038951] [2021-12-22 14:36:18,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083038951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:18,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890202464] [2021-12-22 14:36:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:18,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:36:18,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:18,344 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) [2021-12-22 14:36:18,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 14:36:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 14:36:18,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:36:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:36:19,120 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 [2021-12-22 14:36:19,146 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 [2021-12-22 14:36:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 14:36:19,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:36:19,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890202464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:19,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:36:19,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2021-12-22 14:36:19,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654096304] [2021-12-22 14:36:19,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:19,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 14:36:19,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 14:36:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-22 14:36:19,285 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) [2021-12-22 14:36:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:21,681 INFO L93 Difference]: Finished difference Result 16712 states and 22395 transitions. [2021-12-22 14:36:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 14:36:21,681 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 [2021-12-22 14:36:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:21,709 INFO L225 Difference]: With dead ends: 16712 [2021-12-22 14:36:21,710 INFO L226 Difference]: Without dead ends: 9632 [2021-12-22 14:36:21,728 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 [2021-12-22 14:36:21,728 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 669 mSDsluCounter, 4679 mSDsCounter, 0 mSdLazyCounter, 3437 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:21,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 5694 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3437 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 14:36:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-12-22 14:36:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 8652. [2021-12-22 14:36:22,168 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) [2021-12-22 14:36:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 11495 transitions. [2021-12-22 14:36:22,186 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 11495 transitions. Word has length 172 [2021-12-22 14:36:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:22,186 INFO L470 AbstractCegarLoop]: Abstraction has 8652 states and 11495 transitions. [2021-12-22 14:36:22,187 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) [2021-12-22 14:36:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 11495 transitions. [2021-12-22 14:36:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-22 14:36:22,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:22,202 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] [2021-12-22 14:36:22,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 14:36:22,418 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 [2021-12-22 14:36:22,418 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1960940060, now seen corresponding path program 1 times [2021-12-22 14:36:22,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149231466] [2021-12-22 14:36:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:22,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:36:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 14:36:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 14:36:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 14:36:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 14:36:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 14:36:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:36:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 14:36:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-22 14:36:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-22 14:36:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-22 14:36:22,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149231466] [2021-12-22 14:36:22,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149231466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655792812] [2021-12-22 14:36:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:22,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:36:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:22,768 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) [2021-12-22 14:36:22,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 14:36:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:23,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-22 14:36:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:36:23,530 INFO L353 Elim1Store]: treesize reduction 81, result has 25.7 percent of original size [2021-12-22 14:36:23,531 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 [2021-12-22 14:36:23,745 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 [2021-12-22 14:36:23,815 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 14:36:23,815 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 [2021-12-22 14:36:23,886 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 [2021-12-22 14:36:23,912 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 [2021-12-22 14:36:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 14:36:24,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:36:24,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655792812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:24,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:36:24,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-12-22 14:36:24,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008891331] [2021-12-22 14:36:24,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:36:24,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 14:36:24,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:24,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 14:36:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-12-22 14:36:24,402 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) [2021-12-22 14:36:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:29,459 INFO L93 Difference]: Finished difference Result 21557 states and 29035 transitions. [2021-12-22 14:36:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-22 14:36:29,461 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 [2021-12-22 14:36:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:29,501 INFO L225 Difference]: With dead ends: 21557 [2021-12-22 14:36:29,502 INFO L226 Difference]: Without dead ends: 13589 [2021-12-22 14:36:29,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=2906, Unknown=0, NotChecked=0, Total=3306 [2021-12-22 14:36:29,527 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 2274 mSDsluCounter, 6841 mSDsCounter, 0 mSdLazyCounter, 6187 mSolverCounterSat, 1409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2310 SdHoareTripleChecker+Valid, 7580 SdHoareTripleChecker+Invalid, 7596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1409 IncrementalHoareTripleChecker+Valid, 6187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:29,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2310 Valid, 7580 Invalid, 7596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1409 Valid, 6187 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-22 14:36:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13589 states. [2021-12-22 14:36:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13589 to 10664. [2021-12-22 14:36:30,290 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) [2021-12-22 14:36:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 14183 transitions. [2021-12-22 14:36:30,318 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 14183 transitions. Word has length 178 [2021-12-22 14:36:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:30,318 INFO L470 AbstractCegarLoop]: Abstraction has 10664 states and 14183 transitions. [2021-12-22 14:36:30,318 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) [2021-12-22 14:36:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 14183 transitions. [2021-12-22 14:36:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-22 14:36:30,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:30,341 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] [2021-12-22 14:36:30,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 14:36:30,559 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 [2021-12-22 14:36:30,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1411015937, now seen corresponding path program 1 times [2021-12-22 14:36:30,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:30,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997093847] [2021-12-22 14:36:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:30,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 14:36:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 14:36:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 14:36:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 14:36:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 14:36:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:36:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-22 14:36:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 14:36:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 14:36:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-22 14:36:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 14:36:30,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:30,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997093847] [2021-12-22 14:36:30,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997093847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:30,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125358405] [2021-12-22 14:36:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:30,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:36:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:30,880 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) [2021-12-22 14:36:30,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 14:36:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 14:36:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:36:31,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:36:31,563 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 [2021-12-22 14:36:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:36:31,593 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 [2021-12-22 14:36:31,638 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 [2021-12-22 14:36:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 14:36:31,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:36:31,958 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 [2021-12-22 14:36:31,988 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 [2021-12-22 14:36:31,998 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 [2021-12-22 14:36:32,014 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 [2021-12-22 14:36:32,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125358405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:32,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:36:32,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-22 14:36:32,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323559417] [2021-12-22 14:36:32,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:36:32,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 14:36:32,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 14:36:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=537, Unknown=4, NotChecked=196, Total=812 [2021-12-22 14:36:32,016 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) [2021-12-22 14:36:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:37,140 INFO L93 Difference]: Finished difference Result 21451 states and 29179 transitions. [2021-12-22 14:36:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 14:36:37,141 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 [2021-12-22 14:36:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:37,190 INFO L225 Difference]: With dead ends: 21451 [2021-12-22 14:36:37,191 INFO L226 Difference]: Without dead ends: 14327 [2021-12-22 14:36:37,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=1105, Unknown=4, NotChecked=284, Total=1560 [2021-12-22 14:36:37,211 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, 0.1s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 7108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:37,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 13581 Invalid, 7987 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [879 Valid, 7108 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-22 14:36:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14327 states. [2021-12-22 14:36:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14327 to 10672. [2021-12-22 14:36:37,749 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) [2021-12-22 14:36:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 14189 transitions. [2021-12-22 14:36:37,775 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 14189 transitions. Word has length 180 [2021-12-22 14:36:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:37,775 INFO L470 AbstractCegarLoop]: Abstraction has 10672 states and 14189 transitions. [2021-12-22 14:36:37,775 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) [2021-12-22 14:36:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 14189 transitions. [2021-12-22 14:36:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-22 14:36:37,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:37,793 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] [2021-12-22 14:36:37,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 14:36:38,013 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 [2021-12-22 14:36:38,014 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1457104041, now seen corresponding path program 2 times [2021-12-22 14:36:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923395712] [2021-12-22 14:36:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:38,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 14:36:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 14:36:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 14:36:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 14:36:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 14:36:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 14:36:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 14:36:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-22 14:36:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-22 14:36:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-22 14:36:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 14:36:38,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:38,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923395712] [2021-12-22 14:36:38,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923395712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:38,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969559100] [2021-12-22 14:36:38,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 14:36:38,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:36:38,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:38,252 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) [2021-12-22 14:36:38,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 14:36:38,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 14:36:38,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:36:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-22 14:36:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:36:39,099 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 [2021-12-22 14:36:39,129 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 [2021-12-22 14:36:39,177 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 [2021-12-22 14:36:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-22 14:36:39,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:36:40,361 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 [2021-12-22 14:36:41,150 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 [2021-12-22 14:36:42,014 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 [2021-12-22 14:36:42,583 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 [2021-12-22 14:36:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969559100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:42,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:36:42,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-12-22 14:36:42,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790392317] [2021-12-22 14:36:42,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:36:42,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 14:36:42,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 14:36:42,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=685, Unknown=4, NotChecked=220, Total=992 [2021-12-22 14:36:42,587 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) [2021-12-22 14:36:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:48,167 INFO L93 Difference]: Finished difference Result 21705 states and 29574 transitions. [2021-12-22 14:36:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 14:36:48,168 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 [2021-12-22 14:36:48,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:48,203 INFO L225 Difference]: With dead ends: 21705 [2021-12-22 14:36:48,204 INFO L226 Difference]: Without dead ends: 14577 [2021-12-22 14:36:48,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=214, Invalid=1604, Unknown=4, NotChecked=340, Total=2162 [2021-12-22 14:36:48,217 INFO L933 BasicCegarLoop]: 1230 mSDtfsCounter, 1578 mSDsluCounter, 14393 mSDsCounter, 0 mSdLazyCounter, 8124 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 15623 SdHoareTripleChecker+Invalid, 8789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 8124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:48,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1636 Valid, 15623 Invalid, 8789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 8124 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-22 14:36:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14577 states. [2021-12-22 14:36:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14577 to 11553. [2021-12-22 14:36:48,721 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) [2021-12-22 14:36:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11553 states to 11553 states and 15319 transitions. [2021-12-22 14:36:48,746 INFO L78 Accepts]: Start accepts. Automaton has 11553 states and 15319 transitions. Word has length 186 [2021-12-22 14:36:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:48,747 INFO L470 AbstractCegarLoop]: Abstraction has 11553 states and 15319 transitions. [2021-12-22 14:36:48,747 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) [2021-12-22 14:36:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11553 states and 15319 transitions. [2021-12-22 14:36:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-22 14:36:48,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:48,768 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] [2021-12-22 14:36:48,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 14:36:48,986 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 [2021-12-22 14:36:48,987 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1275845430, now seen corresponding path program 3 times [2021-12-22 14:36:48,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230154800] [2021-12-22 14:36:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:48,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 14:36:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:36:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 14:36:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:36:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 14:36:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 14:36:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 14:36:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 14:36:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-22 14:36:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-22 14:36:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 14:36:49,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230154800] [2021-12-22 14:36:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230154800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:49,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 14:36:49,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389890535] [2021-12-22 14:36:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:49,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 14:36:49,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 14:36:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:36:49,183 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) [2021-12-22 14:36:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:50,773 INFO L93 Difference]: Finished difference Result 22019 states and 30032 transitions. [2021-12-22 14:36:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:36:50,773 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 [2021-12-22 14:36:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:50,821 INFO L225 Difference]: With dead ends: 22019 [2021-12-22 14:36:50,821 INFO L226 Difference]: Without dead ends: 14867 [2021-12-22 14:36:50,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:36:50,841 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 901 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:50,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 2733 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 14:36:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14867 states. [2021-12-22 14:36:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14867 to 11537. [2021-12-22 14:36:51,614 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) [2021-12-22 14:36:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 15283 transitions. [2021-12-22 14:36:51,645 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 15283 transitions. Word has length 194 [2021-12-22 14:36:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:51,646 INFO L470 AbstractCegarLoop]: Abstraction has 11537 states and 15283 transitions. [2021-12-22 14:36:51,646 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) [2021-12-22 14:36:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 15283 transitions. [2021-12-22 14:36:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-22 14:36:51,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:51,665 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] [2021-12-22 14:36:51,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 14:36:51,665 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash -276664566, now seen corresponding path program 1 times [2021-12-22 14:36:51,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:51,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826683486] [2021-12-22 14:36:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:51,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 14:36:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:36:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 14:36:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:36:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 14:36:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 14:36:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 14:36:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 14:36:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:36:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-22 14:36:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-22 14:36:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 14:36:51,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826683486] [2021-12-22 14:36:51,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826683486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:36:51,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:36:51,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 14:36:51,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582954009] [2021-12-22 14:36:51,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:36:51,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 14:36:51,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 14:36:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:36:51,972 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) [2021-12-22 14:36:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:36:53,428 INFO L93 Difference]: Finished difference Result 19701 states and 26376 transitions. [2021-12-22 14:36:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:36:53,428 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 [2021-12-22 14:36:53,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:36:53,476 INFO L225 Difference]: With dead ends: 19701 [2021-12-22 14:36:53,476 INFO L226 Difference]: Without dead ends: 12565 [2021-12-22 14:36:53,492 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 [2021-12-22 14:36:53,493 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 858 mSDsluCounter, 2019 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:36:53,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 2602 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 14:36:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12565 states. [2021-12-22 14:36:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12565 to 11557. [2021-12-22 14:36:54,111 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) [2021-12-22 14:36:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11557 states to 11557 states and 15307 transitions. [2021-12-22 14:36:54,136 INFO L78 Accepts]: Start accepts. Automaton has 11557 states and 15307 transitions. Word has length 194 [2021-12-22 14:36:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:36:54,137 INFO L470 AbstractCegarLoop]: Abstraction has 11557 states and 15307 transitions. [2021-12-22 14:36:54,137 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) [2021-12-22 14:36:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 11557 states and 15307 transitions. [2021-12-22 14:36:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-22 14:36:54,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:36:54,154 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] [2021-12-22 14:36:54,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 14:36:54,154 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:36:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:36:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash 454006962, now seen corresponding path program 2 times [2021-12-22 14:36:54,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:36:54,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240233750] [2021-12-22 14:36:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:36:54,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:36:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:36:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:36:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:36:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:36:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 14:36:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:36:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 14:36:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:36:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 14:36:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 14:36:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 14:36:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 14:36:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:36:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:36:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 14:36:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-22 14:36:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-22 14:36:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:36:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-22 14:36:54,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:36:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240233750] [2021-12-22 14:36:54,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240233750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:54,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529362909] [2021-12-22 14:36:54,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 14:36:54,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:36:54,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:36:54,500 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) [2021-12-22 14:36:54,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 14:36:55,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 14:36:55,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:36:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2249 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-22 14:36:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:36:55,316 INFO L353 Elim1Store]: treesize reduction 85, result has 27.4 percent of original size [2021-12-22 14:36:55,316 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 [2021-12-22 14:36:55,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:36:55,644 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 [2021-12-22 14:36:55,719 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 [2021-12-22 14:36:55,825 INFO L353 Elim1Store]: treesize reduction 46, result has 53.1 percent of original size [2021-12-22 14:36:55,825 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 [2021-12-22 14:36:57,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 14:36:57,589 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 [2021-12-22 14:36:57,666 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 [2021-12-22 14:36:57,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:36:57,768 INFO L353 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-12-22 14:36:57,768 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 [2021-12-22 14:36:57,935 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 [2021-12-22 14:36:57,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:36:57,988 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 [2021-12-22 14:36:58,045 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 [2021-12-22 14:36:58,136 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 [2021-12-22 14:36:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-22 14:36:58,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:36:58,647 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 [2021-12-22 14:36:58,650 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 [2021-12-22 14:36:58,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529362909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:36:58,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:36:58,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 28 [2021-12-22 14:36:58,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745280011] [2021-12-22 14:36:58,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:36:58,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-22 14:36:58,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:36:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-22 14:36:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=8, NotChecked=134, Total=1332 [2021-12-22 14:36:58,824 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)