./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-multipath.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-multipath.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 0de3702172247e9daf688602f826d117afa5d623a980b5c7e35d9c75cbe83a45 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 20:14:52,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 20:14:52,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 20:14:52,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 20:14:52,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 20:14:52,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 20:14:52,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 20:14:52,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 20:14:52,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 20:14:52,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 20:14:52,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 20:14:52,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 20:14:52,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 20:14:52,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 20:14:52,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 20:14:52,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 20:14:52,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 20:14:52,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 20:14:52,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 20:14:52,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 20:14:52,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 20:14:52,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 20:14:52,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 20:14:52,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 20:14:52,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 20:14:52,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 20:14:52,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 20:14:52,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 20:14:52,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 20:14:52,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 20:14:52,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 20:14:52,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 20:14:52,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 20:14:52,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 20:14:52,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 20:14:52,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 20:14:52,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 20:14:52,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 20:14:52,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 20:14:52,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 20:14:52,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 20:14:52,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 20:14:52,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 20:14:52,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 20:14:52,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 20:14:52,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 20:14:52,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 20:14:52,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 20:14:52,873 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 20:14:52,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 20:14:52,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 20:14:52,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 20:14:52,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 20:14:52,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 20:14:52,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 20:14:52,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 20:14:52,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 20:14:52,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 20:14:52,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 20:14:52,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 20:14:52,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 20:14:52,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 20:14:52,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 20:14:52,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 20:14:52,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 20:14:52,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 20:14:52,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 20:14:52,875 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 20:14:52,876 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 20:14:52,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 20:14:52,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 20:14:52,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0de3702172247e9daf688602f826d117afa5d623a980b5c7e35d9c75cbe83a45 [2021-11-02 20:14:53,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 20:14:53,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 20:14:53,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 20:14:53,052 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 20:14:53,053 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 20:14:53,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-multipath.ko-entry_point.cil.out.i [2021-11-02 20:14:53,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea9c1b1c/980c1a8a4b0448948fd22a87d4cfb224/FLAGb608bd0a3 [2021-11-02 20:14:53,712 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 20:14:53,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-multipath.ko-entry_point.cil.out.i [2021-11-02 20:14:53,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea9c1b1c/980c1a8a4b0448948fd22a87d4cfb224/FLAGb608bd0a3 [2021-11-02 20:14:53,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea9c1b1c/980c1a8a4b0448948fd22a87d4cfb224 [2021-11-02 20:14:53,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 20:14:53,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 20:14:53,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 20:14:53,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 20:14:53,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 20:14:53,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:53" (1/1) ... [2021-11-02 20:14:53,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a20ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:53, skipping insertion in model container [2021-11-02 20:14:53,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:53" (1/1) ... [2021-11-02 20:14:53,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 20:14:54,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 20:14:55,325 WARN L228 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-multipath.ko-entry_point.cil.out.i[230653,230666] [2021-11-02 20:14:55,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 20:14:55,370 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 20:14:55,603 WARN L228 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-multipath.ko-entry_point.cil.out.i[230653,230666] [2021-11-02 20:14:55,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 20:14:55,688 INFO L208 MainTranslator]: Completed translation [2021-11-02 20:14:55,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55 WrapperNode [2021-11-02 20:14:55,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 20:14:55,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 20:14:55,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 20:14:55,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 20:14:55,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:14:55,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:14:59,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 20:14:59,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 20:14:59,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 20:14:59,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 20:14:59,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:14:59,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:14:59,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:14:59,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:15:01,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:15:02,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:15:02,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:15:02,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 20:15:02,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 20:15:02,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 20:15:02,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 20:15:02,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (1/1) ... [2021-11-02 20:15:02,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 20:15:02,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 20:15:02,830 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) [2021-11-02 20:15:02,837 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 [2021-11-02 20:15:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-02 20:15:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure multipath_ctr [2021-11-02 20:15:02,872 INFO L138 BoogieDeclarations]: Found implementation of procedure multipath_ctr [2021-11-02 20:15:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure parse_path_selector [2021-11-02 20:15:02,873 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_path_selector [2021-11-02 20:15:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure multipath_dtr [2021-11-02 20:15:02,873 INFO L138 BoogieDeclarations]: Found implementation of procedure multipath_dtr [2021-11-02 20:15:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure free_priority_group [2021-11-02 20:15:02,873 INFO L138 BoogieDeclarations]: Found implementation of procedure free_priority_group [2021-11-02 20:15:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-02 20:15:02,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-02 20:15:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 20:15:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-02 20:15:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure parse_priority_group [2021-11-02 20:15:02,875 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_priority_group [2021-11-02 20:15:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 20:15:02,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 20:15:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure free_multipath [2021-11-02 20:15:02,875 INFO L138 BoogieDeclarations]: Found implementation of procedure free_multipath [2021-11-02 20:15:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_free_slab [2021-11-02 20:15:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 20:15:02,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 20:15:02,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 20:15:12,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 20:15:12,937 INFO L299 CfgBuilder]: Removed 26179 assume(true) statements. [2021-11-02 20:15:12,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:15:12 BoogieIcfgContainer [2021-11-02 20:15:12,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 20:15:12,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 20:15:12,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 20:15:12,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 20:15:12,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:14:53" (1/3) ... [2021-11-02 20:15:12,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46521bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:15:12, skipping insertion in model container [2021-11-02 20:15:12,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:55" (2/3) ... [2021-11-02 20:15:12,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46521bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:15:12, skipping insertion in model container [2021-11-02 20:15:12,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:15:12" (3/3) ... [2021-11-02 20:15:12,962 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-multipath.ko-entry_point.cil.out.i [2021-11-02 20:15:12,966 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 20:15:12,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-02 20:15:13,071 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 20:15:13,076 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 [2021-11-02 20:15:13,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-02 20:15:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 26703 states, 26675 states have (on average 1.4164948453608248) internal successors, (37785), 26680 states have internal predecessors, (37785), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-02 20:15:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 20:15:13,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:15:13,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:15:13,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [free_priority_groupErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 20:15:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:15:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1949403803, now seen corresponding path program 1 times [2021-11-02 20:15:13,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:15:13,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300598321] [2021-11-02 20:15:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:15:13,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:15:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:15:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 20:15:13,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:15:13,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300598321] [2021-11-02 20:15:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300598321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:15:13,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:15:13,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 20:15:13,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590031750] [2021-11-02 20:15:13,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 20:15:13,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:15:13,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 20:15:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 20:15:13,824 INFO L87 Difference]: Start difference. First operand has 26703 states, 26675 states have (on average 1.4164948453608248) internal successors, (37785), 26680 states have internal predecessors, (37785), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:15:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:15:51,502 INFO L93 Difference]: Finished difference Result 53402 states and 75640 transitions. [2021-11-02 20:15:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 20:15:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-02 20:15:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:15:51,636 INFO L225 Difference]: With dead ends: 53402 [2021-11-02 20:15:51,637 INFO L226 Difference]: Without dead ends: 26689 [2021-11-02 20:15:51,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 20:15:51,717 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37682 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30699.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 37682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36339.43ms IncrementalHoareTripleChecker+Time [2021-11-02 20:15:51,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 37682 Unknown, 0 Unchecked, 42.48ms Time], IncrementalHoareTripleChecker [0 Valid, 37682 Invalid, 0 Unknown, 0 Unchecked, 36339.43ms Time] [2021-11-02 20:15:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26689 states. [2021-11-02 20:15:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26689 to 26689. [2021-11-02 20:15:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26689 states, 26662 states have (on average 1.4127972395169155) internal successors, (37668), 26666 states have internal predecessors, (37668), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-02 20:15:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26689 states to 26689 states and 37698 transitions. [2021-11-02 20:15:52,544 INFO L78 Accepts]: Start accepts. Automaton has 26689 states and 37698 transitions. Word has length 96 [2021-11-02 20:15:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:15:52,545 INFO L470 AbstractCegarLoop]: Abstraction has 26689 states and 37698 transitions. [2021-11-02 20:15:52,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:15:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26689 states and 37698 transitions. [2021-11-02 20:15:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 20:15:52,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:15:52,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:15:52,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 20:15:52,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [free_priority_groupErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 20:15:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:15:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash 329765497, now seen corresponding path program 1 times [2021-11-02 20:15:52,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:15:52,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440308884] [2021-11-02 20:15:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:15:52,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:15:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:15:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 20:15:52,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:15:52,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440308884] [2021-11-02 20:15:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440308884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:15:52,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:15:52,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 20:15:52,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992182062] [2021-11-02 20:15:52,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 20:15:52,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:15:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 20:15:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:15:52,769 INFO L87 Difference]: Start difference. First operand 26689 states and 37698 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:16:28,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:16:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:16:54,310 INFO L93 Difference]: Finished difference Result 53333 states and 75357 transitions. [2021-11-02 20:16:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 20:16:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-02 20:16:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:16:54,389 INFO L225 Difference]: With dead ends: 53333 [2021-11-02 20:16:54,390 INFO L226 Difference]: Without dead ends: 26696 [2021-11-02 20:16:54,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.89ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:16:54,453 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 37641 mSDsCounter, 0 mSdLazyCounter, 75329 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51768.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 141.51ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59904.85ms IncrementalHoareTripleChecker+Time [2021-11-02 20:16:54,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 75341 Unknown, 0 Unchecked, 141.51ms Time], IncrementalHoareTripleChecker [12 Valid, 75329 Invalid, 0 Unknown, 0 Unchecked, 59904.85ms Time] [2021-11-02 20:16:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26696 states. [2021-11-02 20:16:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26696 to 26696. [2021-11-02 20:16:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26696 states, 26669 states have (on average 1.4126888897221492) internal successors, (37675), 26673 states have internal predecessors, (37675), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-02 20:16:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26696 states to 26696 states and 37705 transitions. [2021-11-02 20:16:55,120 INFO L78 Accepts]: Start accepts. Automaton has 26696 states and 37705 transitions. Word has length 96 [2021-11-02 20:16:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:16:55,124 INFO L470 AbstractCegarLoop]: Abstraction has 26696 states and 37705 transitions. [2021-11-02 20:16:55,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:16:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 26696 states and 37705 transitions. [2021-11-02 20:16:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-02 20:16:55,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:16:55,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:16:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 20:16:55,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [free_priority_groupErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 20:16:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:16:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2039335336, now seen corresponding path program 1 times [2021-11-02 20:16:55,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:16:55,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453605881] [2021-11-02 20:16:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:16:55,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:16:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:16:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 20:16:55,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:16:55,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453605881] [2021-11-02 20:16:55,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453605881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:16:55,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:16:55,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 20:16:55,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212255047] [2021-11-02 20:16:55,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 20:16:55,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:16:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 20:16:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:16:55,318 INFO L87 Difference]: Start difference. First operand 26696 states and 37705 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:17:26,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:17:52,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:17:53,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:17:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:17:55,355 INFO L93 Difference]: Finished difference Result 53338 states and 75356 transitions. [2021-11-02 20:17:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 20:17:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-02 20:17:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:17:55,428 INFO L225 Difference]: With dead ends: 53338 [2021-11-02 20:17:55,429 INFO L226 Difference]: Without dead ends: 26698 [2021-11-02 20:17:55,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.84ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:17:55,489 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 37641 mSDsCounter, 0 mSdLazyCounter, 75334 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50619.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 118.44ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58603.02ms IncrementalHoareTripleChecker+Time [2021-11-02 20:17:55,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 75336 Unknown, 0 Unchecked, 118.44ms Time], IncrementalHoareTripleChecker [2 Valid, 75334 Invalid, 0 Unknown, 0 Unchecked, 58603.02ms Time] [2021-11-02 20:17:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26698 states. [2021-11-02 20:17:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26698 to 26698. [2021-11-02 20:17:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26698 states, 26671 states have (on average 1.4126579430842487) internal successors, (37677), 26675 states have internal predecessors, (37677), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-02 20:17:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26698 states to 26698 states and 37707 transitions. [2021-11-02 20:17:55,999 INFO L78 Accepts]: Start accepts. Automaton has 26698 states and 37707 transitions. Word has length 103 [2021-11-02 20:17:56,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:17:56,000 INFO L470 AbstractCegarLoop]: Abstraction has 26698 states and 37707 transitions. [2021-11-02 20:17:56,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:17:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26698 states and 37707 transitions. [2021-11-02 20:17:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-02 20:17:56,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:17:56,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:17:56,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 20:17:56,012 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [free_priority_groupErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 20:17:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:17:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1356495700, now seen corresponding path program 1 times [2021-11-02 20:17:56,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:17:56,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2943750] [2021-11-02 20:17:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:17:56,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:17:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:17:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 20:17:56,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:17:56,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2943750] [2021-11-02 20:17:56,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2943750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:17:56,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:17:56,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 20:17:56,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317873072] [2021-11-02 20:17:56,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 20:17:56,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:17:56,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 20:17:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:17:56,236 INFO L87 Difference]: Start difference. First operand 26698 states and 37707 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:18:18,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:18:20,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:19:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:19:16,499 INFO L93 Difference]: Finished difference Result 79911 states and 112941 transitions. [2021-11-02 20:19:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 20:19:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-02 20:19:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:19:16,663 INFO L225 Difference]: With dead ends: 79911 [2021-11-02 20:19:16,663 INFO L226 Difference]: Without dead ends: 49127 [2021-11-02 20:19:16,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.64ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:19:16,747 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 37585 mSDsluCounter, 37602 mSDsCounter, 0 mSdLazyCounter, 75251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66458.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37585 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 75254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 135.55ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77748.09ms IncrementalHoareTripleChecker+Time [2021-11-02 20:19:16,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37585 Valid, 80 Invalid, 75254 Unknown, 0 Unchecked, 135.55ms Time], IncrementalHoareTripleChecker [3 Valid, 75251 Invalid, 0 Unknown, 0 Unchecked, 77748.09ms Time] [2021-11-02 20:19:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49127 states. [2021-11-02 20:19:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49127 to 49121. [2021-11-02 20:19:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49121 states, 49071 states have (on average 1.4135640194819752) internal successors, (69365), 49076 states have internal predecessors, (69365), 30 states have call successors, (30), 16 states have call predecessors, (30), 16 states have return successors, (35), 30 states have call predecessors, (35), 30 states have call successors, (35) [2021-11-02 20:19:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49121 states to 49121 states and 69430 transitions. [2021-11-02 20:19:17,831 INFO L78 Accepts]: Start accepts. Automaton has 49121 states and 69430 transitions. Word has length 105 [2021-11-02 20:19:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:19:17,832 INFO L470 AbstractCegarLoop]: Abstraction has 49121 states and 69430 transitions. [2021-11-02 20:19:17,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 20:19:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49121 states and 69430 transitions. [2021-11-02 20:19:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-02 20:19:17,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:19:17,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:19:17,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 20:19:17,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting free_priority_groupErr0ASSERT_VIOLATIONERROR_FUNCTION === [free_priority_groupErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr0ASSERT_VIOLATIONERROR_FUNCTION, parse_path_selectorErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-02 20:19:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:19:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1369030695, now seen corresponding path program 1 times [2021-11-02 20:19:17,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:19:17,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315527969] [2021-11-02 20:19:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:19:17,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:19:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:19:18,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-02 20:19:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:19:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 20:19:18,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:19:18,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315527969] [2021-11-02 20:19:18,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315527969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:19:18,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:19:18,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 20:19:18,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568587264] [2021-11-02 20:19:18,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 20:19:18,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:19:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 20:19:18,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 20:19:18,098 INFO L87 Difference]: Start difference. First operand 49121 states and 69430 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)