./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.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 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:58:04,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:58:04,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:58:04,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:58:04,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:58:04,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:58:04,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:58:04,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:58:04,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:58:04,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:58:04,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:58:04,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:58:04,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:58:04,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:58:04,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:58:04,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:58:04,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:58:04,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:58:04,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:58:04,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:58:04,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:58:04,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:58:04,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:58:04,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:58:04,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:58:04,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:58:04,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:58:04,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:58:04,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:58:04,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:58:04,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:58:04,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:58:04,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:58:04,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:58:04,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:58:04,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:58:04,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:58:04,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:58:04,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:58:04,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:58:04,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:58:04,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:58:04,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:58:04,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:58:04,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:58:04,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:58:04,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:58:04,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:58:04,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:58:04,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:58:04,853 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:58:04,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:58:04,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:58:04,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:58:04,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:58:04,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:58:04,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:58:04,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:58:04,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:58:04,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:58:04,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:58:04,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:58:04,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:58:04,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:58:04,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:58:04,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:58:04,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:58:04,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:58:04,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:58:04,857 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:58:04,857 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:58:04,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:58:04,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e [2021-12-28 03:58:05,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:58:05,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:58:05,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:58:05,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:58:05,203 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:58:05,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-12-28 03:58:05,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa365c97b/e63a1b202f42436fa492ecabe9d06dee/FLAGfa921fd46 [2021-12-28 03:58:06,028 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:58:06,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-12-28 03:58:06,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa365c97b/e63a1b202f42436fa492ecabe9d06dee/FLAGfa921fd46 [2021-12-28 03:58:06,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa365c97b/e63a1b202f42436fa492ecabe9d06dee [2021-12-28 03:58:06,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:58:06,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:58:06,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:58:06,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:58:06,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:58:06,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:58:06" (1/1) ... [2021-12-28 03:58:06,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6d9627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:06, skipping insertion in model container [2021-12-28 03:58:06,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:58:06" (1/1) ... [2021-12-28 03:58:06,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:58:06,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:58:07,456 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-12-28 03:58:07,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:58:07,928 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:58:08,046 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-12-28 03:58:08,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:58:08,316 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:58:08,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08 WrapperNode [2021-12-28 03:58:08,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:58:08,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:58:08,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:58:08,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:58:08,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,508 INFO L137 Inliner]: procedures = 174, calls = 1111, calls flagged for inlining = 78, calls inlined = 75, statements flattened = 3508 [2021-12-28 03:58:08,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:58:08,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:58:08,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:58:08,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:58:08,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:58:08,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:58:08,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:58:08,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:58:08,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (1/1) ... [2021-12-28 03:58:08,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:58:08,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:58:08,745 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 03:58:08,759 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 03:58:08,784 INFO L130 BoogieDeclarations]: Found specification of procedure dlci_to_q922 [2021-12-28 03:58:08,785 INFO L138 BoogieDeclarations]: Found implementation of procedure dlci_to_q922 [2021-12-28 03:58:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:58:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 03:58:08,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 03:58:08,786 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 03:58:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 03:58:08,786 INFO L130 BoogieDeclarations]: Found specification of procedure dev_queue_xmit [2021-12-28 03:58:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_queue_xmit [2021-12-28 03:58:08,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:58:08,786 INFO L130 BoogieDeclarations]: Found specification of procedure state [2021-12-28 03:58:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure state [2021-12-28 03:58:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure fr_hard_header [2021-12-28 03:58:08,787 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_hard_header [2021-12-28 03:58:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure find_pvc [2021-12-28 03:58:08,787 INFO L138 BoogieDeclarations]: Found implementation of procedure find_pvc [2021-12-28 03:58:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-12-28 03:58:08,788 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-12-28 03:58:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-28 03:58:08,788 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-28 03:58:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 03:58:08,788 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 03:58:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-28 03:58:08,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-28 03:58:08,789 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-12-28 03:58:08,789 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-12-28 03:58:08,789 INFO L130 BoogieDeclarations]: Found specification of procedure pvc_carrier [2021-12-28 03:58:08,789 INFO L138 BoogieDeclarations]: Found implementation of procedure pvc_carrier [2021-12-28 03:58:08,789 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:58:08,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:58:08,790 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_2 [2021-12-28 03:58:08,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_2 [2021-12-28 03:58:08,790 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2021-12-28 03:58:08,791 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2021-12-28 03:58:08,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-28 03:58:08,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-28 03:58:08,791 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-28 03:58:08,791 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-28 03:58:08,791 INFO L130 BoogieDeclarations]: Found specification of procedure fr_rx [2021-12-28 03:58:08,792 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_rx [2021-12-28 03:58:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure pvc_ioctl [2021-12-28 03:58:08,792 INFO L138 BoogieDeclarations]: Found implementation of procedure pvc_ioctl [2021-12-28 03:58:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:58:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-12-28 03:58:08,793 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-12-28 03:58:08,793 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:58:08,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:58:08,793 INFO L130 BoogieDeclarations]: Found specification of procedure fr_ioctl [2021-12-28 03:58:08,793 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_ioctl [2021-12-28 03:58:08,793 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-12-28 03:58:08,794 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-12-28 03:58:08,794 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-12-28 03:58:08,794 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-12-28 03:58:08,794 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-12-28 03:58:08,794 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-12-28 03:58:08,794 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:58:08,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:58:08,795 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_netdev_mqs [2021-12-28 03:58:08,796 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_netdev_mqs [2021-12-28 03:58:08,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 03:58:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 03:58:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:58:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:58:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:58:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2021-12-28 03:58:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2021-12-28 03:58:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-12-28 03:58:08,798 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-12-28 03:58:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-12-28 03:58:08,798 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-12-28 03:58:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure fr_log_dlci_active [2021-12-28 03:58:08,798 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_log_dlci_active [2021-12-28 03:58:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:58:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:58:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:58:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure delete_unused_pvcs [2021-12-28 03:58:08,799 INFO L138 BoogieDeclarations]: Found implementation of procedure delete_unused_pvcs [2021-12-28 03:58:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-12-28 03:58:08,799 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-12-28 03:58:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-12-28 03:58:08,800 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-12-28 03:58:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure pvc_is_used [2021-12-28 03:58:08,800 INFO L138 BoogieDeclarations]: Found implementation of procedure pvc_is_used [2021-12-28 03:58:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:58:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-28 03:58:08,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-28 03:58:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-28 03:58:08,801 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-28 03:58:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure fr_set_link_state [2021-12-28 03:58:08,801 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_set_link_state [2021-12-28 03:58:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure fr_lmi_send [2021-12-28 03:58:08,802 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_lmi_send [2021-12-28 03:58:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:58:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:58:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 03:58:08,802 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 03:58:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-12-28 03:58:08,803 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-12-28 03:58:08,803 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-28 03:58:08,804 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-28 03:58:08,804 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-12-28 03:58:08,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-12-28 03:58:08,805 INFO L130 BoogieDeclarations]: Found specification of procedure get_dev_p [2021-12-28 03:58:08,805 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dev_p [2021-12-28 03:58:08,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:58:08,805 INFO L130 BoogieDeclarations]: Found specification of procedure linkwatch_fire_event [2021-12-28 03:58:08,806 INFO L138 BoogieDeclarations]: Found implementation of procedure linkwatch_fire_event [2021-12-28 03:58:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure add_pvc [2021-12-28 03:58:08,806 INFO L138 BoogieDeclarations]: Found implementation of procedure add_pvc [2021-12-28 03:58:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdevice [2021-12-28 03:58:08,806 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdevice [2021-12-28 03:58:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 03:58:08,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 03:58:08,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 03:58:08,807 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-28 03:58:08,807 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-28 03:58:08,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:58:08,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:58:09,359 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:58:09,361 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:58:09,479 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 03:58:11,282 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:58:11,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:58:11,297 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 03:58:11,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:58:11 BoogieIcfgContainer [2021-12-28 03:58:11,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:58:11,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:58:11,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:58:11,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:58:11,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:58:06" (1/3) ... [2021-12-28 03:58:11,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a19d8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:58:11, skipping insertion in model container [2021-12-28 03:58:11,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:58:08" (2/3) ... [2021-12-28 03:58:11,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a19d8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:58:11, skipping insertion in model container [2021-12-28 03:58:11,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:58:11" (3/3) ... [2021-12-28 03:58:11,318 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-12-28 03:58:11,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:58:11,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:58:11,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:58:11,376 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 03:58:11,376 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:58:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 1162 states, 845 states have (on average 1.3775147928994083) internal successors, (1164), 861 states have internal predecessors, (1164), 265 states have call successors, (265), 51 states have call predecessors, (265), 50 states have return successors, (261), 260 states have call predecessors, (261), 261 states have call successors, (261) [2021-12-28 03:58:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 03:58:11,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:11,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:58:11,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash 16503480, now seen corresponding path program 1 times [2021-12-28 03:58:11,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:11,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751667084] [2021-12-28 03:58:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:11,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:11,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:11,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:11,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:58:11,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751667084] [2021-12-28 03:58:11,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751667084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:11,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:11,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:58:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318761115] [2021-12-28 03:58:11,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:11,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:58:11,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:58:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:58:11,936 INFO L87 Difference]: Start difference. First operand has 1162 states, 845 states have (on average 1.3775147928994083) internal successors, (1164), 861 states have internal predecessors, (1164), 265 states have call successors, (265), 51 states have call predecessors, (265), 50 states have return successors, (261), 260 states have call predecessors, (261), 261 states have call successors, (261) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:58:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:15,262 INFO L93 Difference]: Finished difference Result 3724 states and 5603 transitions. [2021-12-28 03:58:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:58:15,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2021-12-28 03:58:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:15,305 INFO L225 Difference]: With dead ends: 3724 [2021-12-28 03:58:15,305 INFO L226 Difference]: Without dead ends: 2551 [2021-12-28 03:58:15,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:58:15,332 INFO L933 BasicCegarLoop]: 1894 mSDtfsCounter, 2215 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 3807 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:15,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2436 Valid, 3807 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-28 03:58:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-12-28 03:58:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2273. [2021-12-28 03:58:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 1659 states have (on average 1.3664858348402653) internal successors, (2267), 1679 states have internal predecessors, (2267), 515 states have call successors, (515), 99 states have call predecessors, (515), 98 states have return successors, (514), 512 states have call predecessors, (514), 514 states have call successors, (514) [2021-12-28 03:58:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 3296 transitions. [2021-12-28 03:58:15,552 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 3296 transitions. Word has length 41 [2021-12-28 03:58:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:15,553 INFO L470 AbstractCegarLoop]: Abstraction has 2273 states and 3296 transitions. [2021-12-28 03:58:15,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:58:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 3296 transitions. [2021-12-28 03:58:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 03:58:15,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:15,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:58:15,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:58:15,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash 202884705, now seen corresponding path program 1 times [2021-12-28 03:58:15,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:15,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021859847] [2021-12-28 03:58:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:15,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:15,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:15,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:15,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:15,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:58:15,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:15,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021859847] [2021-12-28 03:58:15,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021859847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:15,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:15,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:58:15,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794412563] [2021-12-28 03:58:15,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:15,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:58:15,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:58:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:58:15,715 INFO L87 Difference]: Start difference. First operand 2273 states and 3296 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:58:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:18,478 INFO L93 Difference]: Finished difference Result 4811 states and 7034 transitions. [2021-12-28 03:58:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:58:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-28 03:58:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:18,496 INFO L225 Difference]: With dead ends: 4811 [2021-12-28 03:58:18,496 INFO L226 Difference]: Without dead ends: 2550 [2021-12-28 03:58:18,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:58:18,510 INFO L933 BasicCegarLoop]: 2049 mSDtfsCounter, 2219 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:18,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2397 Valid, 4239 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 03:58:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-12-28 03:58:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2272. [2021-12-28 03:58:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 1658 states have (on average 1.3648974668275031) internal successors, (2263), 1678 states have internal predecessors, (2263), 515 states have call successors, (515), 99 states have call predecessors, (515), 98 states have return successors, (514), 512 states have call predecessors, (514), 514 states have call successors, (514) [2021-12-28 03:58:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3292 transitions. [2021-12-28 03:58:18,642 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3292 transitions. Word has length 44 [2021-12-28 03:58:18,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:18,643 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 3292 transitions. [2021-12-28 03:58:18,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 03:58:18,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3292 transitions. [2021-12-28 03:58:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 03:58:18,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:18,653 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:58:18,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:58:18,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash -94841370, now seen corresponding path program 1 times [2021-12-28 03:58:18,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946362384] [2021-12-28 03:58:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:18,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:18,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:18,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:18,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:18,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:18,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:58:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-28 03:58:18,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:18,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946362384] [2021-12-28 03:58:18,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946362384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:18,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:18,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:58:18,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266654356] [2021-12-28 03:58:18,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:18,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:58:18,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:18,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:58:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:58:18,829 INFO L87 Difference]: Start difference. First operand 2272 states and 3292 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:58:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:22,654 INFO L93 Difference]: Finished difference Result 7337 states and 10822 transitions. [2021-12-28 03:58:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:58:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 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 03:58:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:22,686 INFO L225 Difference]: With dead ends: 7337 [2021-12-28 03:58:22,686 INFO L226 Difference]: Without dead ends: 5072 [2021-12-28 03:58:22,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:58:22,699 INFO L933 BasicCegarLoop]: 1892 mSDtfsCounter, 2202 mSDsluCounter, 4561 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 6453 SdHoareTripleChecker+Invalid, 3815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:22,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 6453 Invalid, 3815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 3064 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-28 03:58:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-12-28 03:58:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4554. [2021-12-28 03:58:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 3324 states have (on average 1.3655234657039712) internal successors, (4539), 3368 states have internal predecessors, (4539), 1025 states have call successors, (1025), 197 states have call predecessors, (1025), 204 states have return successors, (1084), 1024 states have call predecessors, (1084), 1024 states have call successors, (1084) [2021-12-28 03:58:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 6648 transitions. [2021-12-28 03:58:22,931 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 6648 transitions. Word has length 66 [2021-12-28 03:58:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:22,933 INFO L470 AbstractCegarLoop]: Abstraction has 4554 states and 6648 transitions. [2021-12-28 03:58:22,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:58:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 6648 transitions. [2021-12-28 03:58:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 03:58:22,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:22,946 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-28 03:58:22,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:58:22,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -248182647, now seen corresponding path program 1 times [2021-12-28 03:58:22,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:22,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78499528] [2021-12-28 03:58:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:22,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:58:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:58:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 03:58:23,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78499528] [2021-12-28 03:58:23,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78499528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:23,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:23,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:58:23,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714182054] [2021-12-28 03:58:23,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:23,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:58:23,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:58:23,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:58:23,152 INFO L87 Difference]: Start difference. First operand 4554 states and 6648 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:58:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:28,663 INFO L93 Difference]: Finished difference Result 15534 states and 23138 transitions. [2021-12-28 03:58:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:58:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 103 [2021-12-28 03:58:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:28,724 INFO L225 Difference]: With dead ends: 15534 [2021-12-28 03:58:28,725 INFO L226 Difference]: Without dead ends: 10992 [2021-12-28 03:58:28,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:58:28,754 INFO L933 BasicCegarLoop]: 2702 mSDtfsCounter, 2578 mSDsluCounter, 2662 mSDsCounter, 0 mSdLazyCounter, 3709 mSolverCounterSat, 1255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2785 SdHoareTripleChecker+Valid, 5364 SdHoareTripleChecker+Invalid, 4964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1255 IncrementalHoareTripleChecker+Valid, 3709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:28,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2785 Valid, 5364 Invalid, 4964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1255 Valid, 3709 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-28 03:58:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2021-12-28 03:58:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 9020. [2021-12-28 03:58:29,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9020 states, 6596 states have (on average 1.3635536688902365) internal successors, (8994), 6698 states have internal predecessors, (8994), 2007 states have call successors, (2007), 389 states have call predecessors, (2007), 416 states have return successors, (2153), 2004 states have call predecessors, (2153), 2006 states have call successors, (2153) [2021-12-28 03:58:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 13154 transitions. [2021-12-28 03:58:29,244 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 13154 transitions. Word has length 103 [2021-12-28 03:58:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:29,245 INFO L470 AbstractCegarLoop]: Abstraction has 9020 states and 13154 transitions. [2021-12-28 03:58:29,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:58:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 13154 transitions. [2021-12-28 03:58:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-28 03:58:29,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:29,296 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-28 03:58:29,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:58:29,296 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1651725426, now seen corresponding path program 1 times [2021-12-28 03:58:29,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:29,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594207709] [2021-12-28 03:58:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:29,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:58:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 03:58:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:58:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-28 03:58:29,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594207709] [2021-12-28 03:58:29,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594207709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:29,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:29,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:58:29,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260772518] [2021-12-28 03:58:29,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:29,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:58:29,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:58:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:58:29,441 INFO L87 Difference]: Start difference. First operand 9020 states and 13154 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:58:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:34,479 INFO L93 Difference]: Finished difference Result 19708 states and 29148 transitions. [2021-12-28 03:58:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:58:34,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2021-12-28 03:58:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:34,530 INFO L225 Difference]: With dead ends: 19708 [2021-12-28 03:58:34,530 INFO L226 Difference]: Without dead ends: 10700 [2021-12-28 03:58:34,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:58:34,569 INFO L933 BasicCegarLoop]: 1849 mSDtfsCounter, 3137 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 1628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3346 SdHoareTripleChecker+Valid, 3864 SdHoareTripleChecker+Invalid, 4677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1628 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:34,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3346 Valid, 3864 Invalid, 4677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1628 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-28 03:58:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10700 states. [2021-12-28 03:58:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10700 to 8736. [2021-12-28 03:58:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8736 states, 6368 states have (on average 1.3613379396984924) internal successors, (8669), 6472 states have internal predecessors, (8669), 1957 states have call successors, (1957), 383 states have call predecessors, (1957), 410 states have return successors, (2098), 1952 states have call predecessors, (2098), 1956 states have call successors, (2098) [2021-12-28 03:58:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8736 states to 8736 states and 12724 transitions. [2021-12-28 03:58:35,044 INFO L78 Accepts]: Start accepts. Automaton has 8736 states and 12724 transitions. Word has length 95 [2021-12-28 03:58:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:35,047 INFO L470 AbstractCegarLoop]: Abstraction has 8736 states and 12724 transitions. [2021-12-28 03:58:35,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:58:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 8736 states and 12724 transitions. [2021-12-28 03:58:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-28 03:58:35,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:35,064 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:58:35,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:58:35,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1725212051, now seen corresponding path program 1 times [2021-12-28 03:58:35,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284425989] [2021-12-28 03:58:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:35,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:58:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-28 03:58:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-28 03:58:35,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:35,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284425989] [2021-12-28 03:58:35,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284425989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:35,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:35,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:58:35,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179736278] [2021-12-28 03:58:35,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:35,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:58:35,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:58:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:58:35,221 INFO L87 Difference]: Start difference. First operand 8736 states and 12724 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:58:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:40,530 INFO L93 Difference]: Finished difference Result 19998 states and 29670 transitions. [2021-12-28 03:58:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:58:40,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 117 [2021-12-28 03:58:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:40,579 INFO L225 Difference]: With dead ends: 19998 [2021-12-28 03:58:40,579 INFO L226 Difference]: Without dead ends: 13371 [2021-12-28 03:58:40,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:58:40,602 INFO L933 BasicCegarLoop]: 2871 mSDtfsCounter, 2477 mSDsluCounter, 2851 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2689 SdHoareTripleChecker+Valid, 5722 SdHoareTripleChecker+Invalid, 5059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:40,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2689 Valid, 5722 Invalid, 5059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1205 Valid, 3854 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-28 03:58:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13371 states. [2021-12-28 03:58:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13371 to 10917. [2021-12-28 03:58:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 7963 states have (on average 1.361170413160869) internal successors, (10839), 8094 states have internal predecessors, (10839), 2438 states have call successors, (2438), 481 states have call predecessors, (2438), 515 states have return successors, (2613), 2431 states have call predecessors, (2613), 2437 states have call successors, (2613) [2021-12-28 03:58:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 15890 transitions. [2021-12-28 03:58:41,111 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 15890 transitions. Word has length 117 [2021-12-28 03:58:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:41,112 INFO L470 AbstractCegarLoop]: Abstraction has 10917 states and 15890 transitions. [2021-12-28 03:58:41,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:58:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 15890 transitions. [2021-12-28 03:58:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-28 03:58:41,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:41,128 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 03:58:41,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:58:41,129 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:41,129 INFO L85 PathProgramCache]: Analyzing trace with hash -159171181, now seen corresponding path program 1 times [2021-12-28 03:58:41,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:41,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482106691] [2021-12-28 03:58:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:41,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:58:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:58:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 03:58:41,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482106691] [2021-12-28 03:58:41,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482106691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:41,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:41,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:58:41,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316087755] [2021-12-28 03:58:41,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:41,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:58:41,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:58:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:58:41,378 INFO L87 Difference]: Start difference. First operand 10917 states and 15890 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:58:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:48,357 INFO L93 Difference]: Finished difference Result 27579 states and 40872 transitions. [2021-12-28 03:58:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:58:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 122 [2021-12-28 03:58:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:48,432 INFO L225 Difference]: With dead ends: 27579 [2021-12-28 03:58:48,432 INFO L226 Difference]: Without dead ends: 18771 [2021-12-28 03:58:48,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:58:48,468 INFO L933 BasicCegarLoop]: 2915 mSDtfsCounter, 2587 mSDsluCounter, 4685 mSDsCounter, 0 mSdLazyCounter, 5504 mSolverCounterSat, 1420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2728 SdHoareTripleChecker+Valid, 7600 SdHoareTripleChecker+Invalid, 6924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1420 IncrementalHoareTripleChecker+Valid, 5504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:48,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2728 Valid, 7600 Invalid, 6924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1420 Valid, 5504 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-28 03:58:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18771 states. [2021-12-28 03:58:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18771 to 10921. [2021-12-28 03:58:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10921 states, 7967 states have (on average 1.3609890799548137) internal successors, (10843), 8098 states have internal predecessors, (10843), 2438 states have call successors, (2438), 481 states have call predecessors, (2438), 515 states have return successors, (2613), 2431 states have call predecessors, (2613), 2437 states have call successors, (2613) [2021-12-28 03:58:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 15894 transitions. [2021-12-28 03:58:49,254 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 15894 transitions. Word has length 122 [2021-12-28 03:58:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:49,256 INFO L470 AbstractCegarLoop]: Abstraction has 10921 states and 15894 transitions. [2021-12-28 03:58:49,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:58:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 15894 transitions. [2021-12-28 03:58:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-28 03:58:49,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:49,273 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:49,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:58:49,274 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:49,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1619034978, now seen corresponding path program 1 times [2021-12-28 03:58:49,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:49,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215043847] [2021-12-28 03:58:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:49,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:58:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-28 03:58:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-28 03:58:49,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:49,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215043847] [2021-12-28 03:58:49,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215043847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:49,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:49,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:58:49,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766530827] [2021-12-28 03:58:49,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:49,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:58:49,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:58:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:58:49,422 INFO L87 Difference]: Start difference. First operand 10921 states and 15894 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:58:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:53,139 INFO L93 Difference]: Finished difference Result 19044 states and 28439 transitions. [2021-12-28 03:58:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:58:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 132 [2021-12-28 03:58:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:53,194 INFO L225 Difference]: With dead ends: 19044 [2021-12-28 03:58:53,197 INFO L226 Difference]: Without dead ends: 13373 [2021-12-28 03:58:53,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:58:53,226 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1010 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 3573 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:53,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 3573 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-28 03:58:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13373 states. [2021-12-28 03:58:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13373 to 10931. [2021-12-28 03:58:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 7977 states have (on average 1.3605365425598597) internal successors, (10853), 8108 states have internal predecessors, (10853), 2438 states have call successors, (2438), 481 states have call predecessors, (2438), 515 states have return successors, (2613), 2431 states have call predecessors, (2613), 2437 states have call successors, (2613) [2021-12-28 03:58:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 15904 transitions. [2021-12-28 03:58:53,867 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 15904 transitions. Word has length 132 [2021-12-28 03:58:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:53,868 INFO L470 AbstractCegarLoop]: Abstraction has 10931 states and 15904 transitions. [2021-12-28 03:58:53,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:58:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 15904 transitions. [2021-12-28 03:58:53,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 03:58:53,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:53,884 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:53,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:58:53,885 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1510120385, now seen corresponding path program 1 times [2021-12-28 03:58:53,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:53,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113074760] [2021-12-28 03:58:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:53,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:58:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-28 03:58:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-28 03:58:54,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:54,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113074760] [2021-12-28 03:58:54,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113074760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:54,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:54,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:58:54,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709808683] [2021-12-28 03:58:54,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:54,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:58:54,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:54,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:58:54,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:58:54,123 INFO L87 Difference]: Start difference. First operand 10931 states and 15904 transitions. Second operand has 9 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8)