./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--can--usb--ems_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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--can--usb--ems_usb.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 be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:41:37,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:41:37,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:41:37,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:41:37,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:41:37,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:41:37,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:41:37,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:41:37,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:41:37,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:41:37,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:41:37,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:41:37,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:41:37,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:41:37,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:41:37,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:41:37,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:41:37,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:41:37,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:41:37,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:41:37,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:41:37,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:41:37,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:41:37,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:41:37,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:41:37,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:41:37,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:41:37,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:41:37,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:41:37,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:41:37,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:41:37,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:41:37,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:41:37,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:41:37,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:41:37,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:41:37,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:41:37,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:41:37,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:41:37,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:41:37,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:41:37,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:41:37,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:41:37,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:41:37,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:41:37,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:41:37,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:41:37,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:41:37,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:41:37,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:41:37,538 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:41:37,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:41:37,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:41:37,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:41:37,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:41:37,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:41:37,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:41:37,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:41:37,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:41:37,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:41:37,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:41:37,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:41:37,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:41:37,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:41:37,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:41:37,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:41:37,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:41:37,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:41:37,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:41:37,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:41:37,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:41:37,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:41:37,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:41:37,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2021-12-14 17:41:37,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:41:37,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:41:37,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:41:37,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:41:37,769 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:41:37,770 INFO L432 ainManager$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--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-12-14 17:41:37,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c43e8d8/944abd2b3fce4be89d79ba636a11a157/FLAG25e17ff6e [2021-12-14 17:41:38,388 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:41:38,389 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--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-12-14 17:41:38,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c43e8d8/944abd2b3fce4be89d79ba636a11a157/FLAG25e17ff6e [2021-12-14 17:41:38,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c43e8d8/944abd2b3fce4be89d79ba636a11a157 [2021-12-14 17:41:38,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:41:38,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:41:38,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:41:38,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:41:38,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:41:38,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:38" (1/1) ... [2021-12-14 17:41:38,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19af9bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:38, skipping insertion in model container [2021-12-14 17:41:38,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:41:38" (1/1) ... [2021-12-14 17:41:38,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:41:38,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:41:39,470 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--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2021-12-14 17:41:39,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:41:39,861 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:41:39,956 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--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2021-12-14 17:41:40,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:41:40,080 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:41:40,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40 WrapperNode [2021-12-14 17:41:40,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:41:40,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:41:40,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:41:40,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:41:40,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,229 INFO L137 Inliner]: procedures = 169, calls = 719, calls flagged for inlining = 77, calls inlined = 77, statements flattened = 1996 [2021-12-14 17:41:40,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:41:40,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:41:40,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:41:40,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:41:40,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:41:40,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:41:40,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:41:40,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:41:40,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (1/1) ... [2021-12-14 17:41:40,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:41:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:41:40,401 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) [2021-12-14 17:41:40,419 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 [2021-12-14 17:41:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-12-14 17:41:40,429 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-12-14 17:41:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:41:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_18 [2021-12-14 17:41:40,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_18 [2021-12-14 17:41:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2021-12-14 17:41:40,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2021-12-14 17:41:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2021-12-14 17:41:40,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2021-12-14 17:41:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-12-14 17:41:40,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-12-14 17:41:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:41:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:41:40,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:41:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:41:40,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:41:40,431 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-12-14 17:41:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-12-14 17:41:40,431 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2021-12-14 17:41:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2021-12-14 17:41:40,431 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-12-14 17:41:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-12-14 17:41:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-12-14 17:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-12-14 17:41:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2021-12-14 17:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2021-12-14 17:41:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-12-14 17:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-12-14 17:41:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-14 17:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-14 17:41:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:41:40,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-12-14 17:41:40,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-12-14 17:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-14 17:41:40,433 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-14 17:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2021-12-14 17:41:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2021-12-14 17:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:41:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2021-12-14 17:41:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2021-12-14 17:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:41:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:41:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:41:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:41:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:41:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-14 17:41:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-14 17:41:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2021-12-14 17:41:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2021-12-14 17:41:40,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:41:40,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-14 17:41:40,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-14 17:41:40,437 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2021-12-14 17:41:40,437 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2021-12-14 17:41:40,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:41:40,438 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-12-14 17:41:40,438 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-12-14 17:41:40,438 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-14 17:41:40,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-14 17:41:40,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:41:40,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:41:40,438 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2021-12-14 17:41:40,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2021-12-14 17:41:40,439 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 17:41:40,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-14 17:41:40,439 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-12-14 17:41:40,439 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-12-14 17:41:40,439 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-12-14 17:41:40,439 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-12-14 17:41:40,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:41:40,439 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_disconnect [2021-12-14 17:41:40,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_disconnect [2021-12-14 17:41:40,440 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-12-14 17:41:40,440 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-12-14 17:41:40,440 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-12-14 17:41:40,440 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-12-14 17:41:40,440 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2021-12-14 17:41:40,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2021-12-14 17:41:40,441 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-14 17:41:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-14 17:41:40,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:41:40,441 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-12-14 17:41:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-12-14 17:41:40,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:41:40,441 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_rx_err [2021-12-14 17:41:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_rx_err [2021-12-14 17:41:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-14 17:41:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-14 17:41:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-12-14 17:41:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-12-14 17:41:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-14 17:41:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-14 17:41:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-14 17:41:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-14 17:41:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-14 17:41:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-14 17:41:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-12-14 17:41:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-12-14 17:41:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2021-12-14 17:41:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2021-12-14 17:41:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:41:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2021-12-14 17:41:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2021-12-14 17:41:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:41:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:41:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:41:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:41:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:41:40,858 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:41:40,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:41:41,041 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:41:41,437 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-14 17:41:43,009 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:41:43,025 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:41:43,026 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:41:43,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:41:43 BoogieIcfgContainer [2021-12-14 17:41:43,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:41:43,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:41:43,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:41:43,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:41:43,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:41:38" (1/3) ... [2021-12-14 17:41:43,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cc53e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:41:43, skipping insertion in model container [2021-12-14 17:41:43,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:41:40" (2/3) ... [2021-12-14 17:41:43,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cc53e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:41:43, skipping insertion in model container [2021-12-14 17:41:43,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:41:43" (3/3) ... [2021-12-14 17:41:43,041 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-12-14 17:41:43,045 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:41:43,045 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:41:43,090 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:41:43,094 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 [2021-12-14 17:41:43,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:41:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 658 states, 475 states have (on average 1.3368421052631578) internal successors, (635), 499 states have internal predecessors, (635), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2021-12-14 17:41:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 17:41:43,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:43,138 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:41:43,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:43,142 INFO L85 PathProgramCache]: Analyzing trace with hash -80698519, now seen corresponding path program 1 times [2021-12-14 17:41:43,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:43,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29834246] [2021-12-14 17:41:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:43,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:43,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:41:43,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:43,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29834246] [2021-12-14 17:41:43,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29834246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:43,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:43,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:41:43,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634419339] [2021-12-14 17:41:43,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:43,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:41:43,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:41:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:41:43,508 INFO L87 Difference]: Start difference. First operand has 658 states, 475 states have (on average 1.3368421052631578) internal successors, (635), 499 states have internal predecessors, (635), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:41:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:45,485 INFO L93 Difference]: Finished difference Result 2080 states and 2960 transitions. [2021-12-14 17:41:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:41:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-14 17:41:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:45,508 INFO L225 Difference]: With dead ends: 2080 [2021-12-14 17:41:45,508 INFO L226 Difference]: Without dead ends: 1403 [2021-12-14 17:41:45,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:45,522 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 1256 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:45,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 2072 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 17:41:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-12-14 17:41:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1253. [2021-12-14 17:41:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 913 states have (on average 1.3198247535596934) internal successors, (1205), 941 states have internal predecessors, (1205), 249 states have call successors, (249), 91 states have call predecessors, (249), 90 states have return successors, (244), 234 states have call predecessors, (244), 244 states have call successors, (244) [2021-12-14 17:41:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1698 transitions. [2021-12-14 17:41:45,648 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1698 transitions. Word has length 28 [2021-12-14 17:41:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:45,649 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 1698 transitions. [2021-12-14 17:41:45,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:41:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1698 transitions. [2021-12-14 17:41:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 17:41:45,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:45,651 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, 1, 1, 1, 1] [2021-12-14 17:41:45,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:41:45,652 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash 366324340, now seen corresponding path program 1 times [2021-12-14 17:41:45,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:45,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146937091] [2021-12-14 17:41:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:45,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:45,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:45,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:45,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:41:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:45,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146937091] [2021-12-14 17:41:45,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146937091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:45,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:45,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:41:45,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125482526] [2021-12-14 17:41:45,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:45,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:41:45,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:41:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:41:45,811 INFO L87 Difference]: Start difference. First operand 1253 states and 1698 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-12-14 17:41:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:47,819 INFO L93 Difference]: Finished difference Result 4044 states and 5689 transitions. [2021-12-14 17:41:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:41:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 38 [2021-12-14 17:41:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:47,831 INFO L225 Difference]: With dead ends: 4044 [2021-12-14 17:41:47,831 INFO L226 Difference]: Without dead ends: 2798 [2021-12-14 17:41:47,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:47,836 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 1261 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:47,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 2197 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 17:41:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-12-14 17:41:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2592. [2021-12-14 17:41:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 1892 states have (on average 1.3202959830866807) internal successors, (2498), 1956 states have internal predecessors, (2498), 505 states have call successors, (505), 181 states have call predecessors, (505), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2021-12-14 17:41:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 3579 transitions. [2021-12-14 17:41:47,951 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 3579 transitions. Word has length 38 [2021-12-14 17:41:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:47,951 INFO L470 AbstractCegarLoop]: Abstraction has 2592 states and 3579 transitions. [2021-12-14 17:41:47,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-12-14 17:41:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 3579 transitions. [2021-12-14 17:41:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 17:41:47,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:47,953 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, 1, 1, 1, 1, 1] [2021-12-14 17:41:47,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:41:47,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1529159426, now seen corresponding path program 1 times [2021-12-14 17:41:47,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:47,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584980473] [2021-12-14 17:41:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:47,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:48,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:48,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:41:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:48,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:48,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584980473] [2021-12-14 17:41:48,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584980473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:48,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:48,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:41:48,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453446207] [2021-12-14 17:41:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:48,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:41:48,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:41:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:41:48,060 INFO L87 Difference]: Start difference. First operand 2592 states and 3579 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, (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) [2021-12-14 17:41:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:49,600 INFO L93 Difference]: Finished difference Result 2790 states and 3914 transitions. [2021-12-14 17:41:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:41:49,600 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, (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 39 [2021-12-14 17:41:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:49,612 INFO L225 Difference]: With dead ends: 2790 [2021-12-14 17:41:49,612 INFO L226 Difference]: Without dead ends: 2787 [2021-12-14 17:41:49,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:49,614 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 1032 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:49,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1101 Valid, 1184 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 17:41:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-12-14 17:41:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2591. [2021-12-14 17:41:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 1892 states have (on average 1.319767441860465) internal successors, (2497), 1955 states have internal predecessors, (2497), 504 states have call successors, (504), 181 states have call predecessors, (504), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2021-12-14 17:41:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3577 transitions. [2021-12-14 17:41:49,728 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3577 transitions. Word has length 39 [2021-12-14 17:41:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:49,729 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3577 transitions. [2021-12-14 17:41:49,729 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, (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) [2021-12-14 17:41:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3577 transitions. [2021-12-14 17:41:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 17:41:49,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:49,733 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, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:49,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:41:49,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash -159609161, now seen corresponding path program 1 times [2021-12-14 17:41:49,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:49,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811636923] [2021-12-14 17:41:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:49,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:49,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:49,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:49,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:41:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:49,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:49,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811636923] [2021-12-14 17:41:49,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811636923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:49,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:49,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:41:49,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181242302] [2021-12-14 17:41:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:49,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:41:49,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:41:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:41:49,857 INFO L87 Difference]: Start difference. First operand 2591 states and 3577 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, (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) [2021-12-14 17:41:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:51,032 INFO L93 Difference]: Finished difference Result 2789 states and 3912 transitions. [2021-12-14 17:41:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:41:51,033 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, (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 40 [2021-12-14 17:41:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:51,044 INFO L225 Difference]: With dead ends: 2789 [2021-12-14 17:41:51,045 INFO L226 Difference]: Without dead ends: 2786 [2021-12-14 17:41:51,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:51,046 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 1024 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:51,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 1187 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:41:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-12-14 17:41:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2590. [2021-12-14 17:41:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 1892 states have (on average 1.3192389006342495) internal successors, (2496), 1954 states have internal predecessors, (2496), 503 states have call successors, (503), 181 states have call predecessors, (503), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2021-12-14 17:41:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 3575 transitions. [2021-12-14 17:41:51,148 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 3575 transitions. Word has length 40 [2021-12-14 17:41:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:51,150 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 3575 transitions. [2021-12-14 17:41:51,150 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, (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) [2021-12-14 17:41:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 3575 transitions. [2021-12-14 17:41:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 17:41:51,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:51,151 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:51,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:41:51,151 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -653219039, now seen corresponding path program 1 times [2021-12-14 17:41:51,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:51,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370889419] [2021-12-14 17:41:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:51,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:51,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:51,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:41:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:51,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:51,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370889419] [2021-12-14 17:41:51,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370889419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:51,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:51,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:41:51,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713365091] [2021-12-14 17:41:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:51,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:41:51,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:41:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:41:51,251 INFO L87 Difference]: Start difference. First operand 2590 states and 3575 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, (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) [2021-12-14 17:41:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:52,652 INFO L93 Difference]: Finished difference Result 2788 states and 3910 transitions. [2021-12-14 17:41:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:41:52,653 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, (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 41 [2021-12-14 17:41:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:52,663 INFO L225 Difference]: With dead ends: 2788 [2021-12-14 17:41:52,664 INFO L226 Difference]: Without dead ends: 2785 [2021-12-14 17:41:52,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:52,666 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 1026 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:52,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 1178 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 17:41:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-12-14 17:41:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2589. [2021-12-14 17:41:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 1892 states have (on average 1.3187103594080338) internal successors, (2495), 1953 states have internal predecessors, (2495), 502 states have call successors, (502), 181 states have call predecessors, (502), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2021-12-14 17:41:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3573 transitions. [2021-12-14 17:41:52,769 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3573 transitions. Word has length 41 [2021-12-14 17:41:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:52,769 INFO L470 AbstractCegarLoop]: Abstraction has 2589 states and 3573 transitions. [2021-12-14 17:41:52,769 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, (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) [2021-12-14 17:41:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3573 transitions. [2021-12-14 17:41:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 17:41:52,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:52,770 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:52,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:41:52,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1224748794, now seen corresponding path program 1 times [2021-12-14 17:41:52,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:52,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727682253] [2021-12-14 17:41:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:52,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:41:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:52,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727682253] [2021-12-14 17:41:52,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727682253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:52,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:52,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:41:52,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186549614] [2021-12-14 17:41:52,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:52,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:41:52,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:41:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:41:52,867 INFO L87 Difference]: Start difference. First operand 2589 states and 3573 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, (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) [2021-12-14 17:41:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:54,207 INFO L93 Difference]: Finished difference Result 2787 states and 3908 transitions. [2021-12-14 17:41:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:41:54,208 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, (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 42 [2021-12-14 17:41:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:54,219 INFO L225 Difference]: With dead ends: 2787 [2021-12-14 17:41:54,219 INFO L226 Difference]: Without dead ends: 2775 [2021-12-14 17:41:54,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:41:54,221 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1023 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:54,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1092 Valid, 1177 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 17:41:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2021-12-14 17:41:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2579. [2021-12-14 17:41:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 1883 states have (on average 1.3181093998937865) internal successors, (2482), 1943 states have internal predecessors, (2482), 501 states have call successors, (501), 181 states have call predecessors, (501), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2021-12-14 17:41:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 3559 transitions. [2021-12-14 17:41:54,324 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 3559 transitions. Word has length 42 [2021-12-14 17:41:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:54,325 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 3559 transitions. [2021-12-14 17:41:54,326 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, (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) [2021-12-14 17:41:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 3559 transitions. [2021-12-14 17:41:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 17:41:54,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:54,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:54,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:41:54,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 299575856, now seen corresponding path program 1 times [2021-12-14 17:41:54,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:54,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078773686] [2021-12-14 17:41:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:54,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 17:41:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 17:41:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:41:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:41:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:41:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:41:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:41:54,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:54,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078773686] [2021-12-14 17:41:54,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078773686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:54,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:54,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:41:54,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241456278] [2021-12-14 17:41:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:54,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:41:54,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:54,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:41:54,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:41:54,478 INFO L87 Difference]: Start difference. First operand 2579 states and 3559 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:41:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:56,921 INFO L93 Difference]: Finished difference Result 6290 states and 8671 transitions. [2021-12-14 17:41:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:41:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-12-14 17:41:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:56,936 INFO L225 Difference]: With dead ends: 6290 [2021-12-14 17:41:56,936 INFO L226 Difference]: Without dead ends: 3718 [2021-12-14 17:41:56,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:41:56,944 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 796 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 2769 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:56,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 2769 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 17:41:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-12-14 17:41:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3352. [2021-12-14 17:41:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 2448 states have (on average 1.2957516339869282) internal successors, (3172), 2514 states have internal predecessors, (3172), 624 states have call successors, (624), 252 states have call predecessors, (624), 279 states have return successors, (737), 617 states have call predecessors, (737), 623 states have call successors, (737) [2021-12-14 17:41:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 4533 transitions. [2021-12-14 17:41:57,090 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 4533 transitions. Word has length 85 [2021-12-14 17:41:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:57,090 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 4533 transitions. [2021-12-14 17:41:57,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:41:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 4533 transitions. [2021-12-14 17:41:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 17:41:57,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:57,094 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:57,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:41:57,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash -169264503, now seen corresponding path program 1 times [2021-12-14 17:41:57,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:57,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127418683] [2021-12-14 17:41:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:57,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:41:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:41:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:41:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:41:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:41:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:41:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:41:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 17:41:57,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:57,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127418683] [2021-12-14 17:41:57,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127418683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:57,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:57,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:41:57,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878023690] [2021-12-14 17:41:57,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:57,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:41:57,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:41:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:41:57,233 INFO L87 Difference]: Start difference. First operand 3352 states and 4533 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:41:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:41:58,548 INFO L93 Difference]: Finished difference Result 7908 states and 10733 transitions. [2021-12-14 17:41:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:41:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 101 [2021-12-14 17:41:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:41:58,564 INFO L225 Difference]: With dead ends: 7908 [2021-12-14 17:41:58,565 INFO L226 Difference]: Without dead ends: 4570 [2021-12-14 17:41:58,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:41:58,573 INFO L933 BasicCegarLoop]: 1031 mSDtfsCounter, 983 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:41:58,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 2282 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:41:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2021-12-14 17:41:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 4146. [2021-12-14 17:41:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 3042 states have (on average 1.2840236686390532) internal successors, (3906), 3114 states have internal predecessors, (3906), 746 states have call successors, (746), 322 states have call predecessors, (746), 357 states have return successors, (879), 741 states have call predecessors, (879), 745 states have call successors, (879) [2021-12-14 17:41:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 5531 transitions. [2021-12-14 17:41:58,702 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 5531 transitions. Word has length 101 [2021-12-14 17:41:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:41:58,702 INFO L470 AbstractCegarLoop]: Abstraction has 4146 states and 5531 transitions. [2021-12-14 17:41:58,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:41:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 5531 transitions. [2021-12-14 17:41:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:41:58,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:41:58,709 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:41:58,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:41:58,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:41:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:41:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2107056927, now seen corresponding path program 1 times [2021-12-14 17:41:58,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:41:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495458715] [2021-12-14 17:41:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:41:58,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:41:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:41:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:41:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:41:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:41:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:41:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:41:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:41:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:41:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:41:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:41:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:41:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:41:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:41:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:41:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 17:41:58,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:41:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495458715] [2021-12-14 17:41:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495458715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:41:58,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:41:58,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:41:58,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058226869] [2021-12-14 17:41:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:41:58,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:41:58,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:41:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:41:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:41:58,884 INFO L87 Difference]: Start difference. First operand 4146 states and 5531 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 7 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-14 17:42:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:03,334 INFO L93 Difference]: Finished difference Result 12036 states and 16641 transitions. [2021-12-14 17:42:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 17:42:03,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 7 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2021-12-14 17:42:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:03,364 INFO L225 Difference]: With dead ends: 12036 [2021-12-14 17:42:03,365 INFO L226 Difference]: Without dead ends: 7904 [2021-12-14 17:42:03,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:42:03,375 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 2148 mSDsluCounter, 2717 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 1121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2238 SdHoareTripleChecker+Valid, 3827 SdHoareTripleChecker+Invalid, 2993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1121 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:03,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2238 Valid, 3827 Invalid, 2993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1121 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-14 17:42:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2021-12-14 17:42:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 6908. [2021-12-14 17:42:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6908 states, 5085 states have (on average 1.3061946902654866) internal successors, (6642), 5261 states have internal predecessors, (6642), 1224 states have call successors, (1224), 491 states have call predecessors, (1224), 598 states have return successors, (1611), 1243 states have call predecessors, (1611), 1223 states have call successors, (1611) [2021-12-14 17:42:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 9477 transitions. [2021-12-14 17:42:03,643 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 9477 transitions. Word has length 116 [2021-12-14 17:42:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:03,643 INFO L470 AbstractCegarLoop]: Abstraction has 6908 states and 9477 transitions. [2021-12-14 17:42:03,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 7 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-14 17:42:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 9477 transitions. [2021-12-14 17:42:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 17:42:03,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:03,648 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:03,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 17:42:03,648 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1729290461, now seen corresponding path program 1 times [2021-12-14 17:42:03,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:03,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909890762] [2021-12-14 17:42:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:03,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:42:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:42:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:42:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:42:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 17:42:03,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:03,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909890762] [2021-12-14 17:42:03,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909890762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:42:03,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665371324] [2021-12-14 17:42:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:03,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:42:03,782 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) [2021-12-14 17:42:03,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:42:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 17:42:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:42:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 17:42:04,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:42:04,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665371324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:04,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:42:04,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 17:42:04,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941984568] [2021-12-14 17:42:04,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:04,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:42:04,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:42:04,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:04,385 INFO L87 Difference]: Start difference. First operand 6908 states and 9477 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:42:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:04,696 INFO L93 Difference]: Finished difference Result 17458 states and 23882 transitions. [2021-12-14 17:42:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:42:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 113 [2021-12-14 17:42:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:04,729 INFO L225 Difference]: With dead ends: 17458 [2021-12-14 17:42:04,729 INFO L226 Difference]: Without dead ends: 10568 [2021-12-14 17:42:04,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:04,746 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 684 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:04,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1635 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:42:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10568 states. [2021-12-14 17:42:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10568 to 10560. [2021-12-14 17:42:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10560 states, 7783 states have (on average 1.3129898496723629) internal successors, (10219), 8107 states have internal predecessors, (10219), 1764 states have call successors, (1764), 813 states have call predecessors, (1764), 1012 states have return successors, (2419), 1807 states have call predecessors, (2419), 1763 states have call successors, (2419) [2021-12-14 17:42:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 14402 transitions. [2021-12-14 17:42:05,127 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 14402 transitions. Word has length 113 [2021-12-14 17:42:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:05,128 INFO L470 AbstractCegarLoop]: Abstraction has 10560 states and 14402 transitions. [2021-12-14 17:42:05,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:42:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 14402 transitions. [2021-12-14 17:42:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-14 17:42:05,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:05,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:05,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:42:05,343 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 [2021-12-14 17:42:05,343 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1544150734, now seen corresponding path program 1 times [2021-12-14 17:42:05,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:05,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208400490] [2021-12-14 17:42:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:05,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:42:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:42:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:42:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:42:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:42:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:42:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:42:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:42:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-14 17:42:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:42:05,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208400490] [2021-12-14 17:42:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208400490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:05,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:05,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:42:05,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110899879] [2021-12-14 17:42:05,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:05,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:42:05,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:42:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:42:05,522 INFO L87 Difference]: Start difference. First operand 10560 states and 14402 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:42:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:08,208 INFO L93 Difference]: Finished difference Result 22888 states and 31715 transitions. [2021-12-14 17:42:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:42:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 132 [2021-12-14 17:42:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:08,248 INFO L225 Difference]: With dead ends: 22888 [2021-12-14 17:42:08,248 INFO L226 Difference]: Without dead ends: 12346 [2021-12-14 17:42:08,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:42:08,275 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 1062 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:08,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 2294 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 17:42:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12346 states. [2021-12-14 17:42:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12346 to 10576. [2021-12-14 17:42:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10576 states, 7799 states have (on average 1.3123477368893448) internal successors, (10235), 8123 states have internal predecessors, (10235), 1764 states have call successors, (1764), 813 states have call predecessors, (1764), 1012 states have return successors, (2419), 1807 states have call predecessors, (2419), 1763 states have call successors, (2419) [2021-12-14 17:42:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10576 states to 10576 states and 14418 transitions. [2021-12-14 17:42:08,651 INFO L78 Accepts]: Start accepts. Automaton has 10576 states and 14418 transitions. Word has length 132 [2021-12-14 17:42:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:08,651 INFO L470 AbstractCegarLoop]: Abstraction has 10576 states and 14418 transitions. [2021-12-14 17:42:08,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:42:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10576 states and 14418 transitions. [2021-12-14 17:42:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 17:42:08,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:08,657 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:08,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:42:08,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1099273262, now seen corresponding path program 1 times [2021-12-14 17:42:08,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:08,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466135453] [2021-12-14 17:42:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:08,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:42:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:42:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:42:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:42:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:42:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:42:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:42:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:42:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 17:42:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:42:08,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:08,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466135453] [2021-12-14 17:42:08,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466135453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:42:08,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471911322] [2021-12-14 17:42:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:08,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:08,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:42:08,842 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) [2021-12-14 17:42:08,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:42:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:09,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:42:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:42:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:42:09,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:42:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:42:09,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471911322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:42:09,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:42:09,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2021-12-14 17:42:09,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513425221] [2021-12-14 17:42:09,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:42:09,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:42:09,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:42:09,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:42:09,647 INFO L87 Difference]: Start difference. First operand 10576 states and 14418 transitions. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 17:42:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:13,245 INFO L93 Difference]: Finished difference Result 22984 states and 31843 transitions. [2021-12-14 17:42:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:42:13,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 134 [2021-12-14 17:42:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:13,276 INFO L225 Difference]: With dead ends: 22984 [2021-12-14 17:42:13,276 INFO L226 Difference]: Without dead ends: 12426 [2021-12-14 17:42:13,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:42:13,296 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 813 mSDsluCounter, 2818 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 3599 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:13,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 3599 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-14 17:42:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12426 states. [2021-12-14 17:42:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12426 to 10672. [2021-12-14 17:42:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10672 states, 7895 states have (on average 1.3085497150094998) internal successors, (10331), 8219 states have internal predecessors, (10331), 1764 states have call successors, (1764), 813 states have call predecessors, (1764), 1012 states have return successors, (2419), 1807 states have call predecessors, (2419), 1763 states have call successors, (2419) [2021-12-14 17:42:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 14514 transitions. [2021-12-14 17:42:13,720 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 14514 transitions. Word has length 134 [2021-12-14 17:42:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:13,721 INFO L470 AbstractCegarLoop]: Abstraction has 10672 states and 14514 transitions. [2021-12-14 17:42:13,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 17:42:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 14514 transitions. [2021-12-14 17:42:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-14 17:42:13,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:13,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:13,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:42:13,947 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,SelfDestructingSolverStorable11 [2021-12-14 17:42:13,947 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash 623947696, now seen corresponding path program 1 times [2021-12-14 17:42:13,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:13,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923989152] [2021-12-14 17:42:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:13,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:42:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:42:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:42:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:42:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:42:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-14 17:42:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 17:42:14,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923989152] [2021-12-14 17:42:14,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923989152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:42:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977888426] [2021-12-14 17:42:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:14,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:14,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:42:14,147 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) [2021-12-14 17:42:14,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:42:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:42:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:42:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 17:42:14,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:42:14,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977888426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:14,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:42:14,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2021-12-14 17:42:14,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394152433] [2021-12-14 17:42:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:14,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:42:14,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:14,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:42:14,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:42:14,826 INFO L87 Difference]: Start difference. First operand 10672 states and 14514 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:42:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:16,263 INFO L93 Difference]: Finished difference Result 31982 states and 43503 transitions. [2021-12-14 17:42:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:42:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 138 [2021-12-14 17:42:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:16,353 INFO L225 Difference]: With dead ends: 31982 [2021-12-14 17:42:16,354 INFO L226 Difference]: Without dead ends: 31974 [2021-12-14 17:42:16,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:42:16,370 INFO L933 BasicCegarLoop]: 1284 mSDtfsCounter, 1632 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:16,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 2850 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 17:42:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31974 states. [2021-12-14 17:42:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31974 to 31940. [2021-12-14 17:42:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31940 states, 23623 states have (on average 1.3089362062396817) internal successors, (30921), 24611 states have internal predecessors, (30921), 5284 states have call successors, (5284), 2433 states have call predecessors, (5284), 3032 states have return successors, (7251), 5399 states have call predecessors, (7251), 5283 states have call successors, (7251) [2021-12-14 17:42:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31940 states to 31940 states and 43456 transitions. [2021-12-14 17:42:17,620 INFO L78 Accepts]: Start accepts. Automaton has 31940 states and 43456 transitions. Word has length 138 [2021-12-14 17:42:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:17,621 INFO L470 AbstractCegarLoop]: Abstraction has 31940 states and 43456 transitions. [2021-12-14 17:42:17,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:42:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31940 states and 43456 transitions. [2021-12-14 17:42:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-14 17:42:17,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:17,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:17,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:42:17,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:17,849 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1636194720, now seen corresponding path program 1 times [2021-12-14 17:42:17,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:17,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331896349] [2021-12-14 17:42:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:17,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:17,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:17,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:17,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:42:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:42:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:42:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:42:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:42:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:42:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:42:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:42:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 17:42:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:42:18,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:18,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331896349] [2021-12-14 17:42:18,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331896349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:42:18,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057913770] [2021-12-14 17:42:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:18,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:18,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:42:18,072 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) [2021-12-14 17:42:18,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:42:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:18,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:42:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:42:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 17:42:18,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:42:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:42:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057913770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:42:19,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:42:19,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2021-12-14 17:42:19,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219196773] [2021-12-14 17:42:19,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:42:19,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 17:42:19,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 17:42:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:42:19,047 INFO L87 Difference]: Start difference. First operand 31940 states and 43456 transitions. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 13 states have internal predecessors, (121), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 17:42:24,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:42:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:25,206 INFO L93 Difference]: Finished difference Result 69696 states and 96399 transitions. [2021-12-14 17:42:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 17:42:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 13 states have internal predecessors, (121), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 140 [2021-12-14 17:42:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:25,314 INFO L225 Difference]: With dead ends: 69696 [2021-12-14 17:42:25,314 INFO L226 Difference]: Without dead ends: 37774 [2021-12-14 17:42:25,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:42:25,366 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 1045 mSDsluCounter, 4240 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 766 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 5037 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:25,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 5037 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 1981 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-12-14 17:42:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37774 states. [2021-12-14 17:42:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37774 to 32516. [2021-12-14 17:42:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32516 states, 24199 states have (on average 1.30158271002934) internal successors, (31497), 25187 states have internal predecessors, (31497), 5284 states have call successors, (5284), 2433 states have call predecessors, (5284), 3032 states have return successors, (7251), 5399 states have call predecessors, (7251), 5283 states have call successors, (7251) [2021-12-14 17:42:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32516 states to 32516 states and 44032 transitions. [2021-12-14 17:42:26,723 INFO L78 Accepts]: Start accepts. Automaton has 32516 states and 44032 transitions. Word has length 140 [2021-12-14 17:42:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:26,723 INFO L470 AbstractCegarLoop]: Abstraction has 32516 states and 44032 transitions. [2021-12-14 17:42:26,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 13 states have internal predecessors, (121), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 17:42:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 32516 states and 44032 transitions. [2021-12-14 17:42:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-14 17:42:26,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:26,746 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 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] [2021-12-14 17:42:26,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 17:42:26,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:26,959 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:26,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1012643333, now seen corresponding path program 1 times [2021-12-14 17:42:26,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:26,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101326657] [2021-12-14 17:42:26,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:26,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:42:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:42:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:42:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:42:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:42:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-14 17:42:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-14 17:42:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:42:27,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:27,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101326657] [2021-12-14 17:42:27,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101326657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:42:27,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971727930] [2021-12-14 17:42:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:27,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:42:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:42:27,228 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) [2021-12-14 17:42:27,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:42:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 17:42:27,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:42:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:42:28,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:42:28,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971727930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:28,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:42:28,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2021-12-14 17:42:28,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90707576] [2021-12-14 17:42:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:28,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:42:28,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:42:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:42:28,089 INFO L87 Difference]: Start difference. First operand 32516 states and 44032 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-14 17:42:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:29,099 INFO L93 Difference]: Finished difference Result 49994 states and 67597 transitions. [2021-12-14 17:42:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:42:29,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 148 [2021-12-14 17:42:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:29,146 INFO L225 Difference]: With dead ends: 49994 [2021-12-14 17:42:29,147 INFO L226 Difference]: Without dead ends: 17436 [2021-12-14 17:42:29,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:42:29,192 INFO L933 BasicCegarLoop]: 1042 mSDtfsCounter, 743 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:29,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1278 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:42:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17436 states. [2021-12-14 17:42:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17436 to 17392. [2021-12-14 17:42:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17392 states, 12948 states have (on average 1.2892338585109668) internal successors, (16693), 13453 states have internal predecessors, (16693), 2815 states have call successors, (2815), 1317 states have call predecessors, (2815), 1628 states have return successors, (3828), 2873 states have call predecessors, (3828), 2814 states have call successors, (3828) [2021-12-14 17:42:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17392 states to 17392 states and 23336 transitions. [2021-12-14 17:42:29,785 INFO L78 Accepts]: Start accepts. Automaton has 17392 states and 23336 transitions. Word has length 148 [2021-12-14 17:42:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:29,785 INFO L470 AbstractCegarLoop]: Abstraction has 17392 states and 23336 transitions. [2021-12-14 17:42:29,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-14 17:42:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 17392 states and 23336 transitions. [2021-12-14 17:42:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-14 17:42:29,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:29,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:29,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:42:30,015 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,SelfDestructingSolverStorable14 [2021-12-14 17:42:30,015 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1058668567, now seen corresponding path program 1 times [2021-12-14 17:42:30,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:30,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154725134] [2021-12-14 17:42:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:30,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:42:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:42:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:42:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:42:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:42:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-14 17:42:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 17:42:30,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154725134] [2021-12-14 17:42:30,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154725134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:30,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:30,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:42:30,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248925243] [2021-12-14 17:42:30,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:30,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:42:30,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:30,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:42:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:42:30,212 INFO L87 Difference]: Start difference. First operand 17392 states and 23336 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:42:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:42:33,396 INFO L93 Difference]: Finished difference Result 36304 states and 49148 transitions. [2021-12-14 17:42:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:42:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 150 [2021-12-14 17:42:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:42:33,460 INFO L225 Difference]: With dead ends: 36304 [2021-12-14 17:42:33,461 INFO L226 Difference]: Without dead ends: 18930 [2021-12-14 17:42:33,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:42:33,498 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 715 mSDsluCounter, 3273 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 4083 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:42:33,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 4083 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 17:42:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18930 states. [2021-12-14 17:42:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18930 to 17539. [2021-12-14 17:42:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17539 states, 13053 states have (on average 1.2869072243928599) internal successors, (16798), 13558 states have internal predecessors, (16798), 2836 states have call successors, (2836), 1317 states have call predecessors, (2836), 1649 states have return successors, (3963), 2915 states have call predecessors, (3963), 2835 states have call successors, (3963) [2021-12-14 17:42:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17539 states to 17539 states and 23597 transitions. [2021-12-14 17:42:34,229 INFO L78 Accepts]: Start accepts. Automaton has 17539 states and 23597 transitions. Word has length 150 [2021-12-14 17:42:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:42:34,229 INFO L470 AbstractCegarLoop]: Abstraction has 17539 states and 23597 transitions. [2021-12-14 17:42:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 17:42:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17539 states and 23597 transitions. [2021-12-14 17:42:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 17:42:34,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:42:34,244 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:42:34,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 17:42:34,245 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:42:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:42:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -108107043, now seen corresponding path program 1 times [2021-12-14 17:42:34,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:42:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929831180] [2021-12-14 17:42:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:42:34,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:42:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:42:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:42:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:42:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:42:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:42:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-14 17:42:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:42:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:42:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:42:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:42:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-14 17:42:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:42:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 17:42:34,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:42:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929831180] [2021-12-14 17:42:34,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929831180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:42:34,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:42:34,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:42:34,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487530280] [2021-12-14 17:42:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:42:34,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:42:34,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:42:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:42:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:42:34,524 INFO L87 Difference]: Start difference. First operand 17539 states and 23597 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13)