./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.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 a9a20f3f691c8614da828fa262b8d39a0b290d1ce7d7bab1e11653a91cb5fcdd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:54:10,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:54:10,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:54:10,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:54:10,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:54:10,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:54:10,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:54:10,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:54:10,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:54:10,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:54:10,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:54:10,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:54:10,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:54:10,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:54:10,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:54:10,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:54:10,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:54:10,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:54:10,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:54:10,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:54:10,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:54:10,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:54:10,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:54:10,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:54:10,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:54:10,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:54:10,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:54:10,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:54:10,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:54:10,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:54:10,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:54:10,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:54:10,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:54:10,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:54:10,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:54:10,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:54:10,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:54:10,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:54:10,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:54:10,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:54:10,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:54:10,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:54:10,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:54:10,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:54:10,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:54:10,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:54:10,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:54:10,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:54:10,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:54:10,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:54:10,725 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:54:10,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:54:10,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:54:10,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:54:10,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:54:10,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:54:10,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:54:10,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:54:10,726 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:54:10,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:54:10,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:54:10,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:54:10,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:54:10,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:54:10,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:54:10,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:54:10,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:54:10,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:54:10,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:54:10,728 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:54:10,728 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:54:10,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:54:10,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9a20f3f691c8614da828fa262b8d39a0b290d1ce7d7bab1e11653a91cb5fcdd [2021-12-28 03:54:11,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:54:11,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:54:11,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:54:11,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:54:11,025 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:54:11,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i [2021-12-28 03:54:11,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f86b4278/40658dc235c84c8eb481c92320106e0b/FLAG048de72c2 [2021-12-28 03:54:11,654 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:54:11,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i [2021-12-28 03:54:11,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f86b4278/40658dc235c84c8eb481c92320106e0b/FLAG048de72c2 [2021-12-28 03:54:12,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f86b4278/40658dc235c84c8eb481c92320106e0b [2021-12-28 03:54:12,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:54:12,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:54:12,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:54:12,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:54:12,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:54:12,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:54:12" (1/1) ... [2021-12-28 03:54:12,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a562769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:12, skipping insertion in model container [2021-12-28 03:54:12,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:54:12" (1/1) ... [2021-12-28 03:54:12,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:54:12,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:54:12,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i[161908,161921] [2021-12-28 03:54:13,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:54:13,081 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:54:13,175 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i[161908,161921] [2021-12-28 03:54:13,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:54:13,326 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:54:13,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13 WrapperNode [2021-12-28 03:54:13,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:54:13,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:54:13,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:54:13,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:54:13,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,459 INFO L137 Inliner]: procedures = 139, calls = 575, calls flagged for inlining = 59, calls inlined = 59, statements flattened = 1725 [2021-12-28 03:54:13,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:54:13,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:54:13,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:54:13,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:54:13,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:54:13,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:54:13,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:54:13,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:54:13,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (1/1) ... [2021-12-28 03:54:13,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:54:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:54:13,672 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) [2021-12-28 03:54:13,722 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 [2021-12-28 03:54:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-12-28 03:54:13,744 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-12-28 03:54:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:54:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 03:54:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 03:54:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 03:54:13,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 03:54:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:54:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2021-12-28 03:54:13,745 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2021-12-28 03:54:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-12-28 03:54:13,745 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-12-28 03:54:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 03:54:13,745 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 03:54:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:54:13,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:54:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-12-28 03:54:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-12-28 03:54:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:54:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_suspend [2021-12-28 03:54:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_suspend [2021-12-28 03:54:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:54:13,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:54:13,746 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_resume [2021-12-28 03:54:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_resume [2021-12-28 03:54:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:54:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:54:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-12-28 03:54:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-12-28 03:54:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 03:54:13,747 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 03:54:13,747 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:54:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:54:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_tx_fixup [2021-12-28 03:54:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_tx_fixup [2021-12-28 03:54:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:54:13,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-12-28 03:54:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-12-28 03:54:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2021-12-28 03:54:13,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2021-12-28 03:54:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:54:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-28 03:54:13,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-28 03:54:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:54:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:54:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-28 03:54:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-28 03:54:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_bind [2021-12-28 03:54:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_bind [2021-12-28 03:54:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_manage_power [2021-12-28 03:54:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_manage_power [2021-12-28 03:54:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-28 03:54:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-28 03:54:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:54:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-12-28 03:54:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:54:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:54:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-28 03:54:13,752 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-28 03:54:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_rx_fixup [2021-12-28 03:54:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_rx_fixup [2021-12-28 03:54:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-12-28 03:54:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-12-28 03:54:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_ncm_unbind [2021-12-28 03:54:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_ncm_unbind [2021-12-28 03:54:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure cdc_mbim_unbind [2021-12-28 03:54:13,754 INFO L138 BoogieDeclarations]: Found implementation of procedure cdc_mbim_unbind [2021-12-28 03:54:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:54:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-12-28 03:54:13,754 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-12-28 03:54:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 03:54:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 03:54:13,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 03:54:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:54:13,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:54:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure eth_hdr [2021-12-28 03:54:13,755 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_hdr [2021-12-28 03:54:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-28 03:54:13,755 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-28 03:54:14,147 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:54:14,148 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:54:14,686 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 03:54:14,862 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-12-28 03:54:15,044 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:54:15,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:54:15,054 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 03:54:15,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:54:15 BoogieIcfgContainer [2021-12-28 03:54:15,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:54:15,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:54:15,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:54:15,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:54:15,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:54:12" (1/3) ... [2021-12-28 03:54:15,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34c205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:54:15, skipping insertion in model container [2021-12-28 03:54:15,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:54:13" (2/3) ... [2021-12-28 03:54:15,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34c205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:54:15, skipping insertion in model container [2021-12-28 03:54:15,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:54:15" (3/3) ... [2021-12-28 03:54:15,063 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--cdc_mbim.ko-entry_point.cil.out.i [2021-12-28 03:54:15,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:54:15,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:54:15,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:54:15,114 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 [2021-12-28 03:54:15,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:54:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 523 states, 398 states have (on average 1.407035175879397) internal successors, (560), 412 states have internal predecessors, (560), 94 states have call successors, (94), 31 states have call predecessors, (94), 29 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2021-12-28 03:54:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-28 03:54:15,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:15,141 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] [2021-12-28 03:54:15,141 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1589467643, now seen corresponding path program 1 times [2021-12-28 03:54:15,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:15,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995311438] [2021-12-28 03:54:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:15,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:15,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:15,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:15,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:54:15,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995311438] [2021-12-28 03:54:15,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995311438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:15,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:15,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:15,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349683351] [2021-12-28 03:54:15,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:15,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:15,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:15,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:15,478 INFO L87 Difference]: Start difference. First operand has 523 states, 398 states have (on average 1.407035175879397) internal successors, (560), 412 states have internal predecessors, (560), 94 states have call successors, (94), 31 states have call predecessors, (94), 29 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:54:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:16,816 INFO L93 Difference]: Finished difference Result 1672 states and 2474 transitions. [2021-12-28 03:54:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:54:16,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-12-28 03:54:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:16,833 INFO L225 Difference]: With dead ends: 1672 [2021-12-28 03:54:16,834 INFO L226 Difference]: Without dead ends: 1132 [2021-12-28 03:54:16,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:54:16,845 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 1145 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:16,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 2187 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 03:54:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-28 03:54:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 969. [2021-12-28 03:54:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 753 states have (on average 1.3957503320053122) internal successors, (1051), 760 states have internal predecessors, (1051), 159 states have call successors, (159), 57 states have call predecessors, (159), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-28 03:54:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1363 transitions. [2021-12-28 03:54:16,987 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1363 transitions. Word has length 40 [2021-12-28 03:54:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:16,988 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1363 transitions. [2021-12-28 03:54:16,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:54:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1363 transitions. [2021-12-28 03:54:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 03:54:16,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:16,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:16,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:54:16,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:17,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1949626109, now seen corresponding path program 1 times [2021-12-28 03:54:17,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637981777] [2021-12-28 03:54:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:17,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:17,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:17,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:17,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:17,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:17,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:54:17,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:17,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637981777] [2021-12-28 03:54:17,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637981777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:17,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:17,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:17,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799313805] [2021-12-28 03:54:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:17,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:17,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:17,262 INFO L87 Difference]: Start difference. First operand 969 states and 1363 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:18,014 INFO L93 Difference]: Finished difference Result 1131 states and 1631 transitions. [2021-12-28 03:54:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:54:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 50 [2021-12-28 03:54:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:18,020 INFO L225 Difference]: With dead ends: 1131 [2021-12-28 03:54:18,020 INFO L226 Difference]: Without dead ends: 1128 [2021-12-28 03:54:18,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:54:18,022 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 948 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:18,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1470 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 03:54:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-12-28 03:54:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 968. [2021-12-28 03:54:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 753 states have (on average 1.3944223107569722) internal successors, (1050), 759 states have internal predecessors, (1050), 158 states have call successors, (158), 57 states have call predecessors, (158), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-28 03:54:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1361 transitions. [2021-12-28 03:54:18,082 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1361 transitions. Word has length 50 [2021-12-28 03:54:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:18,083 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1361 transitions. [2021-12-28 03:54:18,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1361 transitions. [2021-12-28 03:54:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-28 03:54:18,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:18,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:18,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:54:18,091 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash 308647439, now seen corresponding path program 1 times [2021-12-28 03:54:18,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:18,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264636194] [2021-12-28 03:54:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:18,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:18,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:18,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:18,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:18,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:18,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:54:18,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:18,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264636194] [2021-12-28 03:54:18,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264636194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:18,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:18,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:18,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006943582] [2021-12-28 03:54:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:18,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:18,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:18,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:18,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:18,259 INFO L87 Difference]: Start difference. First operand 968 states and 1361 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:18,963 INFO L93 Difference]: Finished difference Result 1130 states and 1629 transitions. [2021-12-28 03:54:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:54:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2021-12-28 03:54:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:18,969 INFO L225 Difference]: With dead ends: 1130 [2021-12-28 03:54:18,969 INFO L226 Difference]: Without dead ends: 1127 [2021-12-28 03:54:18,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:54:18,977 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 945 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:18,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 1466 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 03:54:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-28 03:54:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 967. [2021-12-28 03:54:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 753 states have (on average 1.3930942895086322) internal successors, (1049), 758 states have internal predecessors, (1049), 157 states have call successors, (157), 57 states have call predecessors, (157), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-28 03:54:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1359 transitions. [2021-12-28 03:54:19,031 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1359 transitions. Word has length 51 [2021-12-28 03:54:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:19,032 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1359 transitions. [2021-12-28 03:54:19,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1359 transitions. [2021-12-28 03:54:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 03:54:19,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:19,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:19,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:54:19,039 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash 977921088, now seen corresponding path program 1 times [2021-12-28 03:54:19,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:19,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253340789] [2021-12-28 03:54:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:19,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:19,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:19,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:19,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:54:19,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:19,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253340789] [2021-12-28 03:54:19,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253340789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:19,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:19,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:19,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359323039] [2021-12-28 03:54:19,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:19,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:19,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:19,220 INFO L87 Difference]: Start difference. First operand 967 states and 1359 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:20,005 INFO L93 Difference]: Finished difference Result 1129 states and 1627 transitions. [2021-12-28 03:54:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:54:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2021-12-28 03:54:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:20,012 INFO L225 Difference]: With dead ends: 1129 [2021-12-28 03:54:20,013 INFO L226 Difference]: Without dead ends: 1126 [2021-12-28 03:54:20,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:54:20,014 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 942 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:20,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1462 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 03:54:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-12-28 03:54:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 966. [2021-12-28 03:54:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 753 states have (on average 1.3917662682602923) internal successors, (1048), 757 states have internal predecessors, (1048), 156 states have call successors, (156), 57 states have call predecessors, (156), 56 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-28 03:54:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1357 transitions. [2021-12-28 03:54:20,052 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1357 transitions. Word has length 52 [2021-12-28 03:54:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:20,052 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1357 transitions. [2021-12-28 03:54:20,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1357 transitions. [2021-12-28 03:54:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 03:54:20,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:20,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:20,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:54:20,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash 250572594, now seen corresponding path program 1 times [2021-12-28 03:54:20,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:20,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115437364] [2021-12-28 03:54:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:20,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:20,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:20,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:20,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:20,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:20,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:54:20,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:20,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115437364] [2021-12-28 03:54:20,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115437364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:20,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:20,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:20,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725333891] [2021-12-28 03:54:20,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:20,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:20,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:20,170 INFO L87 Difference]: Start difference. First operand 966 states and 1357 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:21,370 INFO L93 Difference]: Finished difference Result 3187 states and 4578 transitions. [2021-12-28 03:54:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:54:21,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2021-12-28 03:54:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:21,416 INFO L225 Difference]: With dead ends: 3187 [2021-12-28 03:54:21,416 INFO L226 Difference]: Without dead ends: 2232 [2021-12-28 03:54:21,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:54:21,420 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 1173 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:21,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 2165 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 03:54:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-12-28 03:54:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1908. [2021-12-28 03:54:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1490 states have (on average 1.393959731543624) internal successors, (2077), 1496 states have internal predecessors, (2077), 305 states have call successors, (305), 113 states have call predecessors, (305), 112 states have return successors, (310), 302 states have call predecessors, (310), 302 states have call successors, (310) [2021-12-28 03:54:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2692 transitions. [2021-12-28 03:54:21,478 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2692 transitions. Word has length 53 [2021-12-28 03:54:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:21,479 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 2692 transitions. [2021-12-28 03:54:21,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2692 transitions. [2021-12-28 03:54:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 03:54:21,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:21,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:21,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:54:21,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -822389373, now seen corresponding path program 1 times [2021-12-28 03:54:21,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:21,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182603352] [2021-12-28 03:54:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:21,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:21,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:21,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:21,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:21,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:54:21,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:21,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182603352] [2021-12-28 03:54:21,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182603352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:21,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:21,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:21,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979590993] [2021-12-28 03:54:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:21,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:21,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:21,564 INFO L87 Difference]: Start difference. First operand 1908 states and 2692 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:22,277 INFO L93 Difference]: Finished difference Result 2230 states and 3223 transitions. [2021-12-28 03:54:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:54:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2021-12-28 03:54:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:22,310 INFO L225 Difference]: With dead ends: 2230 [2021-12-28 03:54:22,311 INFO L226 Difference]: Without dead ends: 2218 [2021-12-28 03:54:22,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:54:22,314 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 938 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:22,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 1461 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 03:54:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-12-28 03:54:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1898. [2021-12-28 03:54:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1481 states have (on average 1.3936529372045916) internal successors, (2064), 1486 states have internal predecessors, (2064), 304 states have call successors, (304), 113 states have call predecessors, (304), 112 states have return successors, (310), 302 states have call predecessors, (310), 302 states have call successors, (310) [2021-12-28 03:54:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2678 transitions. [2021-12-28 03:54:22,440 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2678 transitions. Word has length 54 [2021-12-28 03:54:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:22,441 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 2678 transitions. [2021-12-28 03:54:22,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-28 03:54:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2678 transitions. [2021-12-28 03:54:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 03:54:22,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:22,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:22,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:54:22,443 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1986046453, now seen corresponding path program 1 times [2021-12-28 03:54:22,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:22,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635389421] [2021-12-28 03:54:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:22,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:22,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:22,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:22,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:22,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:54:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:22,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 03:54:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:54:22,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:22,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635389421] [2021-12-28 03:54:22,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635389421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:22,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:22,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:22,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093207008] [2021-12-28 03:54:22,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:22,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:22,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:22,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:22,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:22,557 INFO L87 Difference]: Start difference. First operand 1898 states and 2678 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:54:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:23,734 INFO L93 Difference]: Finished difference Result 6142 states and 8755 transitions. [2021-12-28 03:54:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:54:23,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2021-12-28 03:54:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:23,751 INFO L225 Difference]: With dead ends: 6142 [2021-12-28 03:54:23,752 INFO L226 Difference]: Without dead ends: 4255 [2021-12-28 03:54:23,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:54:23,759 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 1124 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:23,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 2065 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 03:54:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-12-28 03:54:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3604. [2021-12-28 03:54:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2825 states have (on average 1.390796460176991) internal successors, (3929), 2834 states have internal predecessors, (3929), 555 states have call successors, (555), 224 states have call predecessors, (555), 223 states have return successors, (565), 553 states have call predecessors, (565), 553 states have call successors, (565) [2021-12-28 03:54:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 5049 transitions. [2021-12-28 03:54:23,890 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 5049 transitions. Word has length 66 [2021-12-28 03:54:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:23,891 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 5049 transitions. [2021-12-28 03:54:23,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:54:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 5049 transitions. [2021-12-28 03:54:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 03:54:23,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:23,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:23,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:54:23,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:23,894 INFO L85 PathProgramCache]: Analyzing trace with hash -181003579, now seen corresponding path program 1 times [2021-12-28 03:54:23,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:23,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029882175] [2021-12-28 03:54:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:23,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:23,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:23,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:23,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:23,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:23,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:54:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:23,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:54:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:54:23,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:23,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029882175] [2021-12-28 03:54:23,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029882175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:23,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:23,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:23,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379270711] [2021-12-28 03:54:23,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:23,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:23,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:23,991 INFO L87 Difference]: Start difference. First operand 3604 states and 5049 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:54:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:25,541 INFO L93 Difference]: Finished difference Result 10431 states and 14766 transitions. [2021-12-28 03:54:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:54:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2021-12-28 03:54:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:25,568 INFO L225 Difference]: With dead ends: 10431 [2021-12-28 03:54:25,569 INFO L226 Difference]: Without dead ends: 6848 [2021-12-28 03:54:25,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:54:25,583 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 962 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 2856 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:25,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 2856 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 03:54:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-12-28 03:54:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 5818. [2021-12-28 03:54:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 4560 states have (on average 1.3888157894736841) internal successors, (6333), 4575 states have internal predecessors, (6333), 882 states have call successors, (882), 376 states have call predecessors, (882), 375 states have return successors, (896), 878 states have call predecessors, (896), 880 states have call successors, (896) [2021-12-28 03:54:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 8111 transitions. [2021-12-28 03:54:25,810 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 8111 transitions. Word has length 65 [2021-12-28 03:54:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:25,811 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 8111 transitions. [2021-12-28 03:54:25,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:54:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 8111 transitions. [2021-12-28 03:54:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-28 03:54:25,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:25,819 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:25,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:54:25,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1535676253, now seen corresponding path program 1 times [2021-12-28 03:54:25,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:25,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813590883] [2021-12-28 03:54:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:25,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:54:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:54:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:54:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:26,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:54:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:26,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:54:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:26,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:54:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:26,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 03:54:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:26,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 03:54:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 03:54:26,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813590883] [2021-12-28 03:54:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813590883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:26,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:26,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:54:26,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992810101] [2021-12-28 03:54:26,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:26,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:54:26,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:54:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:54:26,028 INFO L87 Difference]: Start difference. First operand 5818 states and 8111 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-28 03:54:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:28,493 INFO L93 Difference]: Finished difference Result 10230 states and 14590 transitions. [2021-12-28 03:54:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:54:28,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 122 [2021-12-28 03:54:28,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:28,534 INFO L225 Difference]: With dead ends: 10230 [2021-12-28 03:54:28,534 INFO L226 Difference]: Without dead ends: 10227 [2021-12-28 03:54:28,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:54:28,540 INFO L933 BasicCegarLoop]: 1327 mSDtfsCounter, 2079 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 3876 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:28,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 3876 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-28 03:54:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2021-12-28 03:54:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 8696. [2021-12-28 03:54:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8696 states, 6817 states have (on average 1.3902009681678158) internal successors, (9477), 6839 states have internal predecessors, (9477), 1318 states have call successors, (1318), 561 states have call predecessors, (1318), 560 states have return successors, (1364), 1313 states have call predecessors, (1364), 1316 states have call successors, (1364) [2021-12-28 03:54:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8696 states to 8696 states and 12159 transitions. [2021-12-28 03:54:28,939 INFO L78 Accepts]: Start accepts. Automaton has 8696 states and 12159 transitions. Word has length 122 [2021-12-28 03:54:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:28,940 INFO L470 AbstractCegarLoop]: Abstraction has 8696 states and 12159 transitions. [2021-12-28 03:54:28,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-28 03:54:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8696 states and 12159 transitions. [2021-12-28 03:54:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 03:54:28,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:28,946 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:28,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:54:28,946 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1504761742, now seen corresponding path program 1 times [2021-12-28 03:54:28,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377140539] [2021-12-28 03:54:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:28,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:54:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:54:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:54:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:54:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:54:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:54:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 03:54:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 03:54:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-28 03:54:29,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377140539] [2021-12-28 03:54:29,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377140539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:29,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:29,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:54:29,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445707991] [2021-12-28 03:54:29,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:29,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:54:29,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:54:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:54:29,120 INFO L87 Difference]: Start difference. First operand 8696 states and 12159 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-28 03:54:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:30,748 INFO L93 Difference]: Finished difference Result 24686 states and 34978 transitions. [2021-12-28 03:54:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:54:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 123 [2021-12-28 03:54:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:30,812 INFO L225 Difference]: With dead ends: 24686 [2021-12-28 03:54:30,812 INFO L226 Difference]: Without dead ends: 16027 [2021-12-28 03:54:30,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:54:30,837 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 1082 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:30,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2411 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 03:54:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16027 states. [2021-12-28 03:54:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16027 to 13615. [2021-12-28 03:54:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13615 states, 10743 states have (on average 1.385832635204319) internal successors, (14888), 10774 states have internal predecessors, (14888), 1996 states have call successors, (1996), 876 states have call predecessors, (1996), 875 states have return successors, (2054), 1988 states have call predecessors, (2054), 1994 states have call successors, (2054) [2021-12-28 03:54:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13615 states to 13615 states and 18938 transitions. [2021-12-28 03:54:31,380 INFO L78 Accepts]: Start accepts. Automaton has 13615 states and 18938 transitions. Word has length 123 [2021-12-28 03:54:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:31,380 INFO L470 AbstractCegarLoop]: Abstraction has 13615 states and 18938 transitions. [2021-12-28 03:54:31,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-28 03:54:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 13615 states and 18938 transitions. [2021-12-28 03:54:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-28 03:54:31,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:31,385 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:31,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 03:54:31,386 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:31,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1949944417, now seen corresponding path program 1 times [2021-12-28 03:54:31,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:31,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622206470] [2021-12-28 03:54:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:31,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:54:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:54:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:54:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:54:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:54:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:54:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 03:54:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-28 03:54:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 03:54:31,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622206470] [2021-12-28 03:54:31,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622206470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:31,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:31,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:54:31,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496957977] [2021-12-28 03:54:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:31,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:54:31,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:54:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:54:31,596 INFO L87 Difference]: Start difference. First operand 13615 states and 18938 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-28 03:54:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:33,348 INFO L93 Difference]: Finished difference Result 20835 states and 29445 transitions. [2021-12-28 03:54:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:54:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 122 [2021-12-28 03:54:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:33,409 INFO L225 Difference]: With dead ends: 20835 [2021-12-28 03:54:33,409 INFO L226 Difference]: Without dead ends: 16267 [2021-12-28 03:54:33,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:54:33,431 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 272 mSDsluCounter, 3588 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 4243 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:33,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 4243 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 03:54:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16267 states. [2021-12-28 03:54:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16267 to 13754. [2021-12-28 03:54:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13754 states, 10862 states have (on average 1.380684956729884) internal successors, (14997), 10913 states have internal predecessors, (14997), 1996 states have call successors, (1996), 876 states have call predecessors, (1996), 895 states have return successors, (2094), 1988 states have call predecessors, (2094), 1994 states have call successors, (2094) [2021-12-28 03:54:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13754 states to 13754 states and 19087 transitions. [2021-12-28 03:54:33,981 INFO L78 Accepts]: Start accepts. Automaton has 13754 states and 19087 transitions. Word has length 122 [2021-12-28 03:54:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:33,981 INFO L470 AbstractCegarLoop]: Abstraction has 13754 states and 19087 transitions. [2021-12-28 03:54:33,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 7 states have internal predecessors, (65), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-28 03:54:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13754 states and 19087 transitions. [2021-12-28 03:54:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-28 03:54:33,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:33,993 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:33,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 03:54:33,993 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1749310071, now seen corresponding path program 1 times [2021-12-28 03:54:33,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:33,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632023395] [2021-12-28 03:54:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:33,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:54:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:54:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:54:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:54:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:54:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:54:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 03:54:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:54:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:54:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-28 03:54:34,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632023395] [2021-12-28 03:54:34,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632023395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:34,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:34,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:54:34,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245981516] [2021-12-28 03:54:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:34,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:54:34,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:54:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:54:34,145 INFO L87 Difference]: Start difference. First operand 13754 states and 19087 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 03:54:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:36,059 INFO L93 Difference]: Finished difference Result 38432 states and 54071 transitions. [2021-12-28 03:54:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:54:36,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 141 [2021-12-28 03:54:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:36,154 INFO L225 Difference]: With dead ends: 38432 [2021-12-28 03:54:36,155 INFO L226 Difference]: Without dead ends: 24715 [2021-12-28 03:54:36,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:54:36,194 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 1197 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:36,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1257 Valid, 2340 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 03:54:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24715 states. [2021-12-28 03:54:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24715 to 21044. [2021-12-28 03:54:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21044 states, 16733 states have (on average 1.3772784318412716) internal successors, (23046), 16802 states have internal predecessors, (23046), 2944 states have call successors, (2944), 1335 states have call predecessors, (2944), 1366 states have return successors, (3062), 2936 states have call predecessors, (3062), 2942 states have call successors, (3062) [2021-12-28 03:54:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21044 states to 21044 states and 29052 transitions. [2021-12-28 03:54:37,048 INFO L78 Accepts]: Start accepts. Automaton has 21044 states and 29052 transitions. Word has length 141 [2021-12-28 03:54:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:37,049 INFO L470 AbstractCegarLoop]: Abstraction has 21044 states and 29052 transitions. [2021-12-28 03:54:37,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 03:54:37,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21044 states and 29052 transitions. [2021-12-28 03:54:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-28 03:54:37,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:37,058 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:37,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 03:54:37,058 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1038448743, now seen corresponding path program 1 times [2021-12-28 03:54:37,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212219127] [2021-12-28 03:54:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:37,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:54:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:54:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:54:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:54:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:54:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:54:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 03:54:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:54:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:54:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 03:54:37,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:37,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212219127] [2021-12-28 03:54:37,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212219127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:37,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:54:37,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:54:37,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047277422] [2021-12-28 03:54:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:37,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:54:37,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:54:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:54:37,268 INFO L87 Difference]: Start difference. First operand 21044 states and 29052 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-28 03:54:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:38,936 INFO L93 Difference]: Finished difference Result 30746 states and 42907 transitions. [2021-12-28 03:54:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:54:38,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2021-12-28 03:54:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:39,161 INFO L225 Difference]: With dead ends: 30746 [2021-12-28 03:54:39,161 INFO L226 Difference]: Without dead ends: 16636 [2021-12-28 03:54:39,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:54:39,227 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 309 mSDsluCounter, 2862 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:39,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 3511 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 03:54:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16636 states. [2021-12-28 03:54:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16636 to 14099. [2021-12-28 03:54:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14099 states, 11225 states have (on average 1.3730066815144766) internal successors, (15412), 11266 states have internal predecessors, (15412), 1966 states have call successors, (1966), 892 states have call predecessors, (1966), 907 states have return successors, (2012), 1960 states have call predecessors, (2012), 1964 states have call successors, (2012) [2021-12-28 03:54:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14099 states to 14099 states and 19390 transitions. [2021-12-28 03:54:39,696 INFO L78 Accepts]: Start accepts. Automaton has 14099 states and 19390 transitions. Word has length 140 [2021-12-28 03:54:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:39,696 INFO L470 AbstractCegarLoop]: Abstraction has 14099 states and 19390 transitions. [2021-12-28 03:54:39,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 6 states have internal predecessors, (82), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-28 03:54:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14099 states and 19390 transitions. [2021-12-28 03:54:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-28 03:54:39,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:54:39,708 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:54:39,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 03:54:39,708 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:54:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:54:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash 935962192, now seen corresponding path program 1 times [2021-12-28 03:54:39,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:54:39,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392831840] [2021-12-28 03:54:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:39,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:54:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:54:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:54:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:54:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:54:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 03:54:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:54:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:54:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:54:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:54:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:54:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:54:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 03:54:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:54:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:54:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-28 03:54:39,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:54:39,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392831840] [2021-12-28 03:54:39,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392831840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:54:39,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591723801] [2021-12-28 03:54:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:54:39,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:54:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:54:39,944 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) [2021-12-28 03:54:39,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:54:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:54:40,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:54:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:54:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 03:54:40,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:54:40,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591723801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:54:40,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:54:40,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-28 03:54:40,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020182140] [2021-12-28 03:54:40,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:54:40,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:54:40,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:54:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:54:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:54:40,750 INFO L87 Difference]: Start difference. First operand 14099 states and 19390 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 03:54:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:54:42,105 INFO L93 Difference]: Finished difference Result 14099 states and 19390 transitions. [2021-12-28 03:54:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:54:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 144 [2021-12-28 03:54:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:54:42,107 INFO L225 Difference]: With dead ends: 14099 [2021-12-28 03:54:42,108 INFO L226 Difference]: Without dead ends: 0 [2021-12-28 03:54:42,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:54:42,125 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1279 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:54:42,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1307 Valid, 1197 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 03:54:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-28 03:54:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-28 03:54:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:54:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 03:54:42,127 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 144 [2021-12-28 03:54:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:54:42,127 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 03:54:42,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 03:54:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-28 03:54:42,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-28 03:54:42,130 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-28 03:54:42,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:54:42,335 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,SelfDestructingSolverStorable13 [2021-12-28 03:54:42,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.