./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-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-32_7a-drivers--net--wireless--p54--p54usb.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 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 12:24:57,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 12:24:57,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 12:24:57,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 12:24:57,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 12:24:57,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 12:24:57,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 12:24:57,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 12:24:57,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 12:24:57,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 12:24:57,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 12:24:57,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 12:24:57,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 12:24:57,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 12:24:57,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 12:24:57,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 12:24:57,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 12:24:57,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 12:24:57,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 12:24:57,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 12:24:57,939 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 12:24:57,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 12:24:57,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 12:24:57,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 12:24:57,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 12:24:57,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 12:24:57,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 12:24:57,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 12:24:57,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 12:24:57,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 12:24:57,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 12:24:57,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 12:24:57,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 12:24:57,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 12:24:57,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 12:24:57,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 12:24:57,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 12:24:57,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 12:24:57,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 12:24:57,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 12:24:57,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 12:24:57,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 12:24:57,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 12:24:58,016 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 12:24:58,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 12:24:58,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 12:24:58,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 12:24:58,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 12:24:58,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 12:24:58,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 12:24:58,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 12:24:58,020 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 12:24:58,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 12:24:58,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 12:24:58,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 12:24:58,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 12:24:58,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 12:24:58,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 12:24:58,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 12:24:58,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 12:24:58,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 12:24:58,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 12:24:58,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 12:24:58,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 12:24:58,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 12:24:58,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 12:24:58,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 12:24:58,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 12:24:58,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 12:24:58,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 12:24:58,024 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 12:24:58,025 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 12:24:58,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 12:24:58,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2022-07-21 12:24:58,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 12:24:58,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 12:24:58,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 12:24:58,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 12:24:58,408 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 12:24:58,410 INFO L432 ainManager$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-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2022-07-21 12:24:58,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e094dfaaa/992705b1a98344a48af483c834bd710f/FLAGdff20e39d [2022-07-21 12:24:59,334 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 12:24:59,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2022-07-21 12:24:59,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e094dfaaa/992705b1a98344a48af483c834bd710f/FLAGdff20e39d [2022-07-21 12:24:59,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e094dfaaa/992705b1a98344a48af483c834bd710f [2022-07-21 12:24:59,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 12:24:59,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 12:24:59,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 12:24:59,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 12:24:59,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 12:24:59,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:24:59" (1/1) ... [2022-07-21 12:24:59,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32973c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:24:59, skipping insertion in model container [2022-07-21 12:24:59,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:24:59" (1/1) ... [2022-07-21 12:24:59,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 12:24:59,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 12:25:01,388 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-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2022-07-21 12:25:01,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 12:25:01,700 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 12:25:01,943 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.AssertionError: HeapLValues must be converted to RValue before their value can be queried. at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.result.HeapLValue.getValue(HeapLValue.java:74) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.BitabsTranslation.abstractAssign(BitabsTranslation.java:517) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.abstractAssginWithBitwiseOp(IntegerTranslation.java:973) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:737) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:372) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1397) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:326) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1081) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:334) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1081) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:334) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1470) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:289) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2361) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:601) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:270) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.performMainRun(MainTranslator.java:244) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:206) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-21 12:25:01,949 INFO L158 Benchmark]: Toolchain (without parser) took 2488.04ms. Allocated memory was 60.8MB in the beginning and 117.4MB in the end (delta: 56.6MB). Free memory was 27.6MB in the beginning and 54.5MB in the end (delta: -26.9MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. [2022-07-21 12:25:01,950 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 60.8MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 12:25:01,952 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2484.29ms. Allocated memory was 60.8MB in the beginning and 117.4MB in the end (delta: 56.6MB). Free memory was 27.4MB in the beginning and 54.5MB in the end (delta: -27.0MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. [2022-07-21 12:25:01,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 60.8MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2484.29ms. Allocated memory was 60.8MB in the beginning and 117.4MB in the end (delta: 56.6MB). Free memory was 27.4MB in the beginning and 54.5MB in the end (delta: -27.0MB). Peak memory consumption was 40.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: AssertionError: HeapLValues must be converted to RValue before their value can be queried. de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: AssertionError: HeapLValues must be converted to RValue before their value can be queried.: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.result.HeapLValue.getValue(HeapLValue.java:74) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 12:25:03,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 12:25:03,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 12:25:03,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 12:25:03,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 12:25:03,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 12:25:03,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 12:25:03,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 12:25:03,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 12:25:03,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 12:25:03,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 12:25:03,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 12:25:03,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 12:25:03,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 12:25:03,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 12:25:03,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 12:25:03,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 12:25:03,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 12:25:03,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 12:25:03,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 12:25:03,824 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 12:25:03,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 12:25:03,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 12:25:03,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 12:25:03,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 12:25:03,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 12:25:03,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 12:25:03,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 12:25:03,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 12:25:03,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 12:25:03,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 12:25:03,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 12:25:03,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 12:25:03,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 12:25:03,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 12:25:03,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 12:25:03,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 12:25:03,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 12:25:03,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 12:25:03,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 12:25:03,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 12:25:03,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 12:25:03,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-07-21 12:25:03,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 12:25:03,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 12:25:03,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 12:25:03,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 12:25:03,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 12:25:03,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 12:25:03,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 12:25:03,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 12:25:03,886 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 12:25:03,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 12:25:03,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 12:25:03,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 12:25:03,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 12:25:03,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 12:25:03,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 12:25:03,894 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 12:25:03,895 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 12:25:03,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 12:25:03,895 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 12:25:03,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 12:25:03,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 12:25:03,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 12:25:03,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 12:25:03,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 12:25:03,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 12:25:03,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 12:25:03,897 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2022-07-21 12:25:04,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 12:25:04,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 12:25:04,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 12:25:04,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 12:25:04,224 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 12:25:04,226 INFO L432 ainManager$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-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2022-07-21 12:25:04,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8817ce612/4ddcc35d92754b8dbc2f56b5e5daf213/FLAG119e44cc7 [2022-07-21 12:25:05,063 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 12:25:05,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2022-07-21 12:25:05,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8817ce612/4ddcc35d92754b8dbc2f56b5e5daf213/FLAG119e44cc7 [2022-07-21 12:25:05,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8817ce612/4ddcc35d92754b8dbc2f56b5e5daf213 [2022-07-21 12:25:05,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 12:25:05,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 12:25:05,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 12:25:05,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 12:25:05,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 12:25:05,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:25:05" (1/1) ... [2022-07-21 12:25:05,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9732ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:05, skipping insertion in model container [2022-07-21 12:25:05,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:25:05" (1/1) ... [2022-07-21 12:25:05,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 12:25:05,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 12:25:06,832 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-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2022-07-21 12:25:07,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 12:25:07,199 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 12:25:07,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 12:25:07,509 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-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2022-07-21 12:25:07,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 12:25:07,564 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 12:25:07,865 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-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2022-07-21 12:25:07,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 12:25:08,011 INFO L208 MainTranslator]: Completed translation [2022-07-21 12:25:08,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08 WrapperNode [2022-07-21 12:25:08,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 12:25:08,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 12:25:08,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 12:25:08,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 12:25:08,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,226 INFO L137 Inliner]: procedures = 232, calls = 1688, calls flagged for inlining = 75, calls inlined = 52, statements flattened = 3434 [2022-07-21 12:25:08,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 12:25:08,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 12:25:08,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 12:25:08,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 12:25:08,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 12:25:08,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 12:25:08,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 12:25:08,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 12:25:08,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (1/1) ... [2022-07-21 12:25:08,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 12:25:08,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 12:25:08,457 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) [2022-07-21 12:25:08,483 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 [2022-07-21 12:25:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-21 12:25:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-07-21 12:25:08,502 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-07-21 12:25:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-07-21 12:25:08,502 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-07-21 12:25:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-07-21 12:25:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 12:25:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-21 12:25:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-07-21 12:25:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-21 12:25:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-21 12:25:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-21 12:25:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-07-21 12:25:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-07-21 12:25:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2022-07-21 12:25:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2022-07-21 12:25:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2022-07-21 12:25:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2022-07-21 12:25:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_common [2022-07-21 12:25:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_common [2022-07-21 12:25:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2022-07-21 12:25:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2022-07-21 12:25:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 12:25:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 12:25:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-07-21 12:25:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-07-21 12:25:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-21 12:25:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-21 12:25:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-21 12:25:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-21 12:25:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 12:25:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 12:25:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2022-07-21 12:25:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2022-07-21 12:25:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-21 12:25:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-21 12:25:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 12:25:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-21 12:25:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 12:25:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2022-07-21 12:25:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-07-21 12:25:08,538 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 12:25:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-21 12:25:08,539 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2022-07-21 12:25:08,539 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2022-07-21 12:25:08,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-07-21 12:25:08,539 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-21 12:25:08,539 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-21 12:25:08,539 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-07-21 12:25:08,539 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-07-21 12:25:08,539 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2022-07-21 12:25:08,539 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2022-07-21 12:25:08,539 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-07-21 12:25:08,540 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-07-21 12:25:08,540 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-07-21 12:25:08,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-07-21 12:25:08,540 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2022-07-21 12:25:08,540 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2022-07-21 12:25:08,540 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-07-21 12:25:08,540 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-07-21 12:25:08,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2022-07-21 12:25:08,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2022-07-21 12:25:08,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-21 12:25:08,540 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-21 12:25:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-07-21 12:25:08,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-07-21 12:25:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2022-07-21 12:25:08,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2022-07-21 12:25:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-21 12:25:08,541 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-21 12:25:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2022-07-21 12:25:08,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2022-07-21 12:25:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-21 12:25:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2022-07-21 12:25:08,541 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2022-07-21 12:25:08,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-07-21 12:25:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-07-21 12:25:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-07-21 12:25:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-21 12:25:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-21 12:25:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-07-21 12:25:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-07-21 12:25:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 12:25:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 12:25:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2022-07-21 12:25:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2022-07-21 12:25:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2022-07-21 12:25:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2022-07-21 12:25:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-07-21 12:25:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-07-21 12:25:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-07-21 12:25:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-07-21 12:25:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 12:25:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev_of_p54u_priv [2022-07-21 12:25:08,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev_of_p54u_priv [2022-07-21 12:25:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-07-21 12:25:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-07-21 12:25:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-07-21 12:25:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2022-07-21 12:25:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2022-07-21 12:25:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-07-21 12:25:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-07-21 12:25:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2022-07-21 12:25:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2022-07-21 12:25:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2022-07-21 12:25:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2022-07-21 12:25:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2022-07-21 12:25:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2022-07-21 12:25:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-07-21 12:25:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-07-21 12:25:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2022-07-21 12:25:08,549 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2022-07-21 12:25:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-21 12:25:08,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-21 12:25:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-07-21 12:25:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-07-21 12:25:08,549 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-07-21 12:25:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2022-07-21 12:25:08,550 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2022-07-21 12:25:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 12:25:08,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 12:25:09,106 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 12:25:09,110 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 12:25:09,712 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-21 12:26:15,098 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 12:26:15,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 12:26:15,116 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 12:26:15,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:26:15 BoogieIcfgContainer [2022-07-21 12:26:15,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 12:26:15,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 12:26:15,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 12:26:15,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 12:26:15,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:25:05" (1/3) ... [2022-07-21 12:26:15,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a70fe13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:26:15, skipping insertion in model container [2022-07-21 12:26:15,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:25:08" (2/3) ... [2022-07-21 12:26:15,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a70fe13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:26:15, skipping insertion in model container [2022-07-21 12:26:15,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:26:15" (3/3) ... [2022-07-21 12:26:15,134 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2022-07-21 12:26:15,149 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 12:26:15,149 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 12:26:15,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 12:26:15,226 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ebc60f7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67d731bf [2022-07-21 12:26:15,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 12:26:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2022-07-21 12:26:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 12:26:15,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:15,244 INFO L195 NwaCegarLoop]: 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] [2022-07-21 12:26:15,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1349896211, now seen corresponding path program 1 times [2022-07-21 12:26:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:15,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706044552] [2022-07-21 12:26:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:26:15,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:15,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:15,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 12:26:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:26:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 12:26:17,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 12:26:17,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:26:17,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706044552] [2022-07-21 12:26:17,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706044552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:26:17,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:26:17,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 12:26:17,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388596241] [2022-07-21 12:26:17,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:26:17,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 12:26:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 12:26:17,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 12:26:17,275 INFO L87 Difference]: Start difference. First operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 12:26:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:17,386 INFO L93 Difference]: Finished difference Result 1453 states and 2054 transitions. [2022-07-21 12:26:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 12:26:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-07-21 12:26:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:17,406 INFO L225 Difference]: With dead ends: 1453 [2022-07-21 12:26:17,406 INFO L226 Difference]: Without dead ends: 718 [2022-07-21 12:26:17,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 12:26:17,419 INFO L413 NwaCegarLoop]: 1007 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:17,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 12:26:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-07-21 12:26:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2022-07-21 12:26:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 511 states have (on average 1.3346379647749511) internal successors, (682), 529 states have internal predecessors, (682), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-07-21 12:26:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 994 transitions. [2022-07-21 12:26:17,525 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 994 transitions. Word has length 39 [2022-07-21 12:26:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:17,525 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 994 transitions. [2022-07-21 12:26:17,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 12:26:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 994 transitions. [2022-07-21 12:26:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 12:26:17,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:17,530 INFO L195 NwaCegarLoop]: 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] [2022-07-21 12:26:17,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 12:26:17,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:17,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1859369301, now seen corresponding path program 1 times [2022-07-21 12:26:17,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:17,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169003639] [2022-07-21 12:26:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:26:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:17,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:17,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 12:26:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:26:19,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 12:26:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 12:26:20,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:26:20,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169003639] [2022-07-21 12:26:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169003639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:26:20,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:26:20,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 12:26:20,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706502304] [2022-07-21 12:26:20,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:26:20,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 12:26:20,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 12:26:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 12:26:20,109 INFO L87 Difference]: Start difference. First operand 718 states and 994 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 12:26:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:20,453 INFO L93 Difference]: Finished difference Result 1433 states and 1985 transitions. [2022-07-21 12:26:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 12:26:20,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-07-21 12:26:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:20,463 INFO L225 Difference]: With dead ends: 1433 [2022-07-21 12:26:20,463 INFO L226 Difference]: Without dead ends: 719 [2022-07-21 12:26:20,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 12:26:20,474 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 176 mSDsluCounter, 2770 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 3762 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:20,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 3762 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 12:26:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-07-21 12:26:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2022-07-21 12:26:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 512 states have (on average 1.333984375) internal successors, (683), 530 states have internal predecessors, (683), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-07-21 12:26:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 995 transitions. [2022-07-21 12:26:20,538 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 995 transitions. Word has length 39 [2022-07-21 12:26:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:20,544 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 995 transitions. [2022-07-21 12:26:20,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 12:26:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 995 transitions. [2022-07-21 12:26:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 12:26:20,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:20,551 INFO L195 NwaCegarLoop]: 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] [2022-07-21 12:26:20,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 12:26:20,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:20,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash 290922194, now seen corresponding path program 1 times [2022-07-21 12:26:20,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:20,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7583095] [2022-07-21 12:26:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:26:20,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:20,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:20,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:20,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 12:26:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:26:22,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 12:26:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 12:26:23,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 12:26:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 12:26:24,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:24,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7583095] [2022-07-21 12:26:24,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7583095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 12:26:24,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 12:26:24,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-07-21 12:26:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601104591] [2022-07-21 12:26:24,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 12:26:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 12:26:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 12:26:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-21 12:26:24,578 INFO L87 Difference]: Start difference. First operand 719 states and 995 transitions. Second operand has 9 states, 7 states have (on average 5.0) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 12:26:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:25,126 INFO L93 Difference]: Finished difference Result 1435 states and 1987 transitions. [2022-07-21 12:26:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 12:26:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-07-21 12:26:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:25,132 INFO L225 Difference]: With dead ends: 1435 [2022-07-21 12:26:25,133 INFO L226 Difference]: Without dead ends: 720 [2022-07-21 12:26:25,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-21 12:26:25,137 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 177 mSDsluCounter, 4550 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 5542 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:25,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 5542 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 12:26:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-07-21 12:26:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2022-07-21 12:26:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 513 states have (on average 1.3333333333333333) internal successors, (684), 531 states have internal predecessors, (684), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-07-21 12:26:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 996 transitions. [2022-07-21 12:26:25,177 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 996 transitions. Word has length 40 [2022-07-21 12:26:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:25,178 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 996 transitions. [2022-07-21 12:26:25,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 12:26:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 996 transitions. [2022-07-21 12:26:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 12:26:25,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:25,181 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 12:26:25,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 12:26:25,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:25,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1769518197, now seen corresponding path program 2 times [2022-07-21 12:26:25,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:25,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509074655] [2022-07-21 12:26:25,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 12:26:25,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:25,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:25,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:25,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 12:26:27,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 12:26:27,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 12:26:27,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:26:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 12:26:27,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:26:27,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509074655] [2022-07-21 12:26:27,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509074655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:26:27,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:26:27,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 12:26:27,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407317962] [2022-07-21 12:26:27,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:26:27,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:26:27,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:27,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:26:27,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:27,599 INFO L87 Difference]: Start difference. First operand 720 states and 996 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-07-21 12:26:29,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 12:26:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:30,155 INFO L93 Difference]: Finished difference Result 2125 states and 2944 transitions. [2022-07-21 12:26:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:26:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 [2022-07-21 12:26:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:30,163 INFO L225 Difference]: With dead ends: 2125 [2022-07-21 12:26:30,164 INFO L226 Difference]: Without dead ends: 1413 [2022-07-21 12:26:30,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:30,168 INFO L413 NwaCegarLoop]: 1159 mSDtfsCounter, 959 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:30,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 2134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-07-21 12:26:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2022-07-21 12:26:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1409. [2022-07-21 12:26:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1005 states have (on average 1.3333333333333333) internal successors, (1340), 1036 states have internal predecessors, (1340), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2022-07-21 12:26:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1952 transitions. [2022-07-21 12:26:30,224 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1952 transitions. Word has length 41 [2022-07-21 12:26:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:30,224 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 1952 transitions. [2022-07-21 12:26:30,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-07-21 12:26:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1952 transitions. [2022-07-21 12:26:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 12:26:30,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:30,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:26:30,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-21 12:26:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:30,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1815198130, now seen corresponding path program 1 times [2022-07-21 12:26:30,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:30,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004072661] [2022-07-21 12:26:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:26:30,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:30,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:30,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:30,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 12:26:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:26:32,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 12:26:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 12:26:33,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 12:26:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 12:26:35,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004072661] [2022-07-21 12:26:35,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004072661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 12:26:35,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 12:26:35,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-07-21 12:26:35,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139224507] [2022-07-21 12:26:35,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 12:26:35,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 12:26:35,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 12:26:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-21 12:26:35,821 INFO L87 Difference]: Start difference. First operand 1409 states and 1952 transitions. Second operand has 11 states, 9 states have (on average 5.666666666666667) internal successors, (51), 11 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-21 12:26:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:36,822 INFO L93 Difference]: Finished difference Result 2808 states and 3895 transitions. [2022-07-21 12:26:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 12:26:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.666666666666667) internal successors, (51), 11 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-07-21 12:26:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:36,833 INFO L225 Difference]: With dead ends: 2808 [2022-07-21 12:26:36,834 INFO L226 Difference]: Without dead ends: 1411 [2022-07-21 12:26:36,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 12:26:36,841 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 354 mSDsluCounter, 4749 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 5741 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:36,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 5741 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 12:26:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-07-21 12:26:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1411. [2022-07-21 12:26:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1007 states have (on average 1.3326713008937439) internal successors, (1342), 1038 states have internal predecessors, (1342), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2022-07-21 12:26:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1954 transitions. [2022-07-21 12:26:36,905 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1954 transitions. Word has length 61 [2022-07-21 12:26:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:36,906 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1954 transitions. [2022-07-21 12:26:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.666666666666667) internal successors, (51), 11 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-21 12:26:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1954 transitions. [2022-07-21 12:26:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 12:26:36,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:36,909 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:26:36,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-21 12:26:37,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:37,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash 934865561, now seen corresponding path program 2 times [2022-07-21 12:26:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:37,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019404311] [2022-07-21 12:26:37,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 12:26:37,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:37,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:37,133 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:37,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 12:26:38,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 12:26:38,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 12:26:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 3040 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:26:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 12:26:39,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:26:39,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:39,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019404311] [2022-07-21 12:26:39,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019404311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:26:39,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:26:39,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 12:26:39,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150269066] [2022-07-21 12:26:39,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:26:39,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:26:39,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:26:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:39,062 INFO L87 Difference]: Start difference. First operand 1411 states and 1954 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:26:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:39,412 INFO L93 Difference]: Finished difference Result 1433 states and 1980 transitions. [2022-07-21 12:26:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:26:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 62 [2022-07-21 12:26:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:39,421 INFO L225 Difference]: With dead ends: 1433 [2022-07-21 12:26:39,421 INFO L226 Difference]: Without dead ends: 1422 [2022-07-21 12:26:39,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:39,423 INFO L413 NwaCegarLoop]: 1006 mSDtfsCounter, 989 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:39,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 1019 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 12:26:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2022-07-21 12:26:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1411. [2022-07-21 12:26:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1007 states have (on average 1.3316782522343595) internal successors, (1341), 1038 states have internal predecessors, (1341), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2022-07-21 12:26:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1953 transitions. [2022-07-21 12:26:39,480 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1953 transitions. Word has length 62 [2022-07-21 12:26:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:39,480 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1953 transitions. [2022-07-21 12:26:39,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:26:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1953 transitions. [2022-07-21 12:26:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 12:26:39,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:39,482 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:26:39,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-21 12:26:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:39,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash 992123863, now seen corresponding path program 1 times [2022-07-21 12:26:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:39,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78067915] [2022-07-21 12:26:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:26:39,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:39,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:39,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:39,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 12:26:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:26:41,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 12:26:41,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 12:26:42,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 12:26:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 12:26:46,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:46,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78067915] [2022-07-21 12:26:46,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78067915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 12:26:46,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 12:26:46,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-21 12:26:46,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006569755] [2022-07-21 12:26:46,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 12:26:46,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 12:26:46,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 12:26:46,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-21 12:26:46,100 INFO L87 Difference]: Start difference. First operand 1411 states and 1953 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-21 12:26:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:47,390 INFO L93 Difference]: Finished difference Result 2812 states and 3897 transitions. [2022-07-21 12:26:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 12:26:47,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 62 [2022-07-21 12:26:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:47,399 INFO L225 Difference]: With dead ends: 2812 [2022-07-21 12:26:47,399 INFO L226 Difference]: Without dead ends: 1413 [2022-07-21 12:26:47,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-07-21 12:26:47,405 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 181 mSDsluCounter, 5540 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:47,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 6532 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 12:26:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2022-07-21 12:26:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1413. [2022-07-21 12:26:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1009 states have (on average 1.3310208126858276) internal successors, (1343), 1040 states have internal predecessors, (1343), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2022-07-21 12:26:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1955 transitions. [2022-07-21 12:26:47,489 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1955 transitions. Word has length 62 [2022-07-21 12:26:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:47,490 INFO L495 AbstractCegarLoop]: Abstraction has 1413 states and 1955 transitions. [2022-07-21 12:26:47,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-21 12:26:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1955 transitions. [2022-07-21 12:26:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 12:26:47,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:47,491 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:26:47,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 12:26:47,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:47,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash -528382000, now seen corresponding path program 2 times [2022-07-21 12:26:47,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166032514] [2022-07-21 12:26:47,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 12:26:47,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:47,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:47,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 12:26:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 12:26:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 12:26:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 3039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:26:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 12:26:51,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:26:51,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:51,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166032514] [2022-07-21 12:26:51,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166032514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:26:51,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:26:51,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 12:26:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220046899] [2022-07-21 12:26:51,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:26:51,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:26:51,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:26:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:51,869 INFO L87 Difference]: Start difference. First operand 1413 states and 1955 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:26:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:51,919 INFO L93 Difference]: Finished difference Result 1415 states and 1956 transitions. [2022-07-21 12:26:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:26:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2022-07-21 12:26:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:51,927 INFO L225 Difference]: With dead ends: 1415 [2022-07-21 12:26:51,927 INFO L226 Difference]: Without dead ends: 1412 [2022-07-21 12:26:51,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:51,929 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 948 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:51,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 991 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 12:26:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-07-21 12:26:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2022-07-21 12:26:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1009 states have (on average 1.330029732408325) internal successors, (1342), 1039 states have internal predecessors, (1342), 308 states have call successors, (308), 95 states have call predecessors, (308), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2022-07-21 12:26:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1953 transitions. [2022-07-21 12:26:51,983 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1953 transitions. Word has length 63 [2022-07-21 12:26:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:51,983 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 1953 transitions. [2022-07-21 12:26:51,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:26:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1953 transitions. [2022-07-21 12:26:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 12:26:51,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:51,985 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:26:52,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 12:26:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:52,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash 799813546, now seen corresponding path program 1 times [2022-07-21 12:26:52,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:52,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678325937] [2022-07-21 12:26:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:26:52,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:52,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:52,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:52,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 12:26:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:26:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:26:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:26:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 12:26:56,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:26:56,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:26:56,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678325937] [2022-07-21 12:26:56,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678325937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:26:56,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:26:56,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 12:26:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75193504] [2022-07-21 12:26:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:26:56,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:26:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:26:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:26:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:56,614 INFO L87 Difference]: Start difference. First operand 1412 states and 1953 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:26:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:26:56,668 INFO L93 Difference]: Finished difference Result 1414 states and 1954 transitions. [2022-07-21 12:26:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:26:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-07-21 12:26:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:26:56,678 INFO L225 Difference]: With dead ends: 1414 [2022-07-21 12:26:56,678 INFO L226 Difference]: Without dead ends: 1411 [2022-07-21 12:26:56,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:26:56,681 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 945 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 12:26:56,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 989 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 12:26:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-07-21 12:26:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1411. [2022-07-21 12:26:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1009 states have (on average 1.3290386521308226) internal successors, (1341), 1038 states have internal predecessors, (1341), 307 states have call successors, (307), 95 states have call predecessors, (307), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2022-07-21 12:26:56,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1951 transitions. [2022-07-21 12:26:56,738 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1951 transitions. Word has length 64 [2022-07-21 12:26:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:26:56,739 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1951 transitions. [2022-07-21 12:26:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:26:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1951 transitions. [2022-07-21 12:26:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 12:26:56,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:26:56,741 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:26:56,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 12:26:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:26:56,960 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:26:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:26:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash -975792621, now seen corresponding path program 1 times [2022-07-21 12:26:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:26:56,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456136553] [2022-07-21 12:26:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:26:56,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:26:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:26:56,966 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:26:57,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 12:26:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:26:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 3203 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:26:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:27:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 12:27:01,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:27:01,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:27:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456136553] [2022-07-21 12:27:01,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456136553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:27:01,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:27:01,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 12:27:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670328629] [2022-07-21 12:27:01,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:27:01,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:27:01,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:27:01,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:27:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:01,532 INFO L87 Difference]: Start difference. First operand 1411 states and 1951 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:27:01,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:27:01,580 INFO L93 Difference]: Finished difference Result 1413 states and 1952 transitions. [2022-07-21 12:27:01,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:27:01,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 65 [2022-07-21 12:27:01,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:27:01,588 INFO L225 Difference]: With dead ends: 1413 [2022-07-21 12:27:01,589 INFO L226 Difference]: Without dead ends: 1410 [2022-07-21 12:27:01,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:01,590 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 942 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 12:27:01,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 987 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 12:27:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2022-07-21 12:27:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1410. [2022-07-21 12:27:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1009 states have (on average 1.32804757185332) internal successors, (1340), 1037 states have internal predecessors, (1340), 306 states have call successors, (306), 95 states have call predecessors, (306), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2022-07-21 12:27:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1949 transitions. [2022-07-21 12:27:01,646 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1949 transitions. Word has length 65 [2022-07-21 12:27:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:27:01,648 INFO L495 AbstractCegarLoop]: Abstraction has 1410 states and 1949 transitions. [2022-07-21 12:27:01,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:27:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1949 transitions. [2022-07-21 12:27:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 12:27:01,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:27:01,654 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:27:01,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 12:27:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:27:01,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:27:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:27:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash -185004083, now seen corresponding path program 1 times [2022-07-21 12:27:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:27:01,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377982071] [2022-07-21 12:27:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:27:01,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:27:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:27:01,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:27:01,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 12:27:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:27:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 3204 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:27:04,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:27:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 12:27:06,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:27:06,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:27:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377982071] [2022-07-21 12:27:06,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377982071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:27:06,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:27:06,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 12:27:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388031325] [2022-07-21 12:27:06,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:27:06,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:27:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:27:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:27:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:06,204 INFO L87 Difference]: Start difference. First operand 1410 states and 1949 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:27:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:27:06,420 INFO L93 Difference]: Finished difference Result 4176 states and 5791 transitions. [2022-07-21 12:27:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:27:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2022-07-21 12:27:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:27:06,441 INFO L225 Difference]: With dead ends: 4176 [2022-07-21 12:27:06,441 INFO L226 Difference]: Without dead ends: 2776 [2022-07-21 12:27:06,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:06,450 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 931 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 12:27:06,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 2140 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 12:27:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2022-07-21 12:27:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2771. [2022-07-21 12:27:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 1981 states have (on average 1.331145885916204) internal successors, (2637), 2035 states have internal predecessors, (2637), 605 states have call successors, (605), 187 states have call predecessors, (605), 184 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2022-07-21 12:27:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 3844 transitions. [2022-07-21 12:27:06,566 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 3844 transitions. Word has length 66 [2022-07-21 12:27:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:27:06,567 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 3844 transitions. [2022-07-21 12:27:06,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 12:27:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 3844 transitions. [2022-07-21 12:27:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 12:27:06,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:27:06,570 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:27:06,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 12:27:06,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:27:06,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:27:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:27:06,792 INFO L85 PathProgramCache]: Analyzing trace with hash -779176628, now seen corresponding path program 1 times [2022-07-21 12:27:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:27:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010965039] [2022-07-21 12:27:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:27:06,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:27:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:27:06,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:27:06,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 12:27:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:27:09,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 3558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:27:09,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:27:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 12:27:09,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:27:09,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:27:09,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010965039] [2022-07-21 12:27:09,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010965039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:27:09,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:27:09,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 12:27:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105650784] [2022-07-21 12:27:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:27:09,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:27:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:27:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:27:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:09,615 INFO L87 Difference]: Start difference. First operand 2771 states and 3844 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-21 12:27:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:27:10,297 INFO L93 Difference]: Finished difference Result 5599 states and 7766 transitions. [2022-07-21 12:27:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:27:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 112 [2022-07-21 12:27:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:27:10,321 INFO L225 Difference]: With dead ends: 5599 [2022-07-21 12:27:10,321 INFO L226 Difference]: Without dead ends: 2846 [2022-07-21 12:27:10,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:10,335 INFO L413 NwaCegarLoop]: 994 mSDtfsCounter, 52 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 12:27:10,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1948 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 12:27:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2022-07-21 12:27:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2833. [2022-07-21 12:27:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2041 states have (on average 1.33219010289074) internal successors, (2719), 2095 states have internal predecessors, (2719), 605 states have call successors, (605), 189 states have call predecessors, (605), 186 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2022-07-21 12:27:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3926 transitions. [2022-07-21 12:27:10,479 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3926 transitions. Word has length 112 [2022-07-21 12:27:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:27:10,480 INFO L495 AbstractCegarLoop]: Abstraction has 2833 states and 3926 transitions. [2022-07-21 12:27:10,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-21 12:27:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3926 transitions. [2022-07-21 12:27:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-21 12:27:10,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:27:10,485 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:27:10,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 12:27:10,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:27:10,700 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:27:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:27:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2095317379, now seen corresponding path program 1 times [2022-07-21 12:27:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:27:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048737816] [2022-07-21 12:27:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:27:10,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:27:10,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:27:10,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:27:10,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 12:27:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:27:13,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 3652 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 12:27:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:27:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 12:27:15,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:27:15,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:27:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048737816] [2022-07-21 12:27:15,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048737816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:27:15,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:27:15,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 12:27:15,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527364163] [2022-07-21 12:27:15,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:27:15,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 12:27:15,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:27:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 12:27:15,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 12:27:15,162 INFO L87 Difference]: Start difference. First operand 2833 states and 3926 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-21 12:27:18,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 12:27:20,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 12:27:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:27:20,506 INFO L93 Difference]: Finished difference Result 5905 states and 8249 transitions. [2022-07-21 12:27:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 12:27:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2022-07-21 12:27:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:27:20,526 INFO L225 Difference]: With dead ends: 5905 [2022-07-21 12:27:20,526 INFO L226 Difference]: Without dead ends: 3102 [2022-07-21 12:27:20,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 12:27:20,539 INFO L413 NwaCegarLoop]: 1072 mSDtfsCounter, 152 mSDsluCounter, 4119 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 5191 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-21 12:27:20,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 5191 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-07-21 12:27:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-07-21 12:27:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2853. [2022-07-21 12:27:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2057 states have (on average 1.329606222654351) internal successors, (2735), 2111 states have internal predecessors, (2735), 605 states have call successors, (605), 189 states have call predecessors, (605), 190 states have return successors, (630), 604 states have call predecessors, (630), 602 states have call successors, (630) [2022-07-21 12:27:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 3970 transitions. [2022-07-21 12:27:20,690 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 3970 transitions. Word has length 141 [2022-07-21 12:27:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:27:20,690 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 3970 transitions. [2022-07-21 12:27:20,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-21 12:27:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 3970 transitions. [2022-07-21 12:27:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-21 12:27:20,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:27:20,695 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:27:20,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 12:27:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:27:20,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:27:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:27:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1072486492, now seen corresponding path program 1 times [2022-07-21 12:27:20,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:27:20,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470376810] [2022-07-21 12:27:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:27:20,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:27:20,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:27:20,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:27:20,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 12:27:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:27:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 3669 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 12:27:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:27:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 12:27:25,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 12:27:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 12:27:28,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:27:28,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470376810] [2022-07-21 12:27:28,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470376810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 12:27:28,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 12:27:28,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 12:27:28,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037916045] [2022-07-21 12:27:28,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 12:27:28,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 12:27:28,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:27:28,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 12:27:28,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-21 12:27:28,681 INFO L87 Difference]: Start difference. First operand 2853 states and 3970 transitions. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-21 12:27:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:27:33,534 INFO L93 Difference]: Finished difference Result 5726 states and 7989 transitions. [2022-07-21 12:27:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 12:27:33,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 147 [2022-07-21 12:27:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:27:33,552 INFO L225 Difference]: With dead ends: 5726 [2022-07-21 12:27:33,552 INFO L226 Difference]: Without dead ends: 2887 [2022-07-21 12:27:33,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-07-21 12:27:33,564 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 26 mSDsluCounter, 4918 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 5903 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 12:27:33,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 5903 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 12:27:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-21 12:27:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2877. [2022-07-21 12:27:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2081 states have (on average 1.3258049014896685) internal successors, (2759), 2135 states have internal predecessors, (2759), 605 states have call successors, (605), 189 states have call predecessors, (605), 190 states have return successors, (630), 604 states have call predecessors, (630), 602 states have call successors, (630) [2022-07-21 12:27:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 3994 transitions. [2022-07-21 12:27:33,693 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 3994 transitions. Word has length 147 [2022-07-21 12:27:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:27:33,694 INFO L495 AbstractCegarLoop]: Abstraction has 2877 states and 3994 transitions. [2022-07-21 12:27:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-21 12:27:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 3994 transitions. [2022-07-21 12:27:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-21 12:27:33,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:27:33,700 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:27:33,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 12:27:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:27:33,920 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:27:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:27:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1148257020, now seen corresponding path program 2 times [2022-07-21 12:27:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:27:33,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81702459] [2022-07-21 12:27:33,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 12:27:33,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:27:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:27:33,926 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:27:33,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 12:27:36,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 12:27:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 12:27:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 3091 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:27:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:27:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-21 12:27:36,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:27:36,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:27:36,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81702459] [2022-07-21 12:27:36,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81702459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:27:36,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:27:36,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 12:27:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54835436] [2022-07-21 12:27:36,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:27:36,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:27:36,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:27:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:27:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:36,399 INFO L87 Difference]: Start difference. First operand 2877 states and 3994 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2022-07-21 12:27:36,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:27:36,608 INFO L93 Difference]: Finished difference Result 6273 states and 8767 transitions. [2022-07-21 12:27:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:27:36,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 153 [2022-07-21 12:27:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:27:36,645 INFO L225 Difference]: With dead ends: 6273 [2022-07-21 12:27:36,645 INFO L226 Difference]: Without dead ends: 3426 [2022-07-21 12:27:36,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:27:36,660 INFO L413 NwaCegarLoop]: 1175 mSDtfsCounter, 147 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 12:27:36,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 2181 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 12:27:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2022-07-21 12:27:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 2889. [2022-07-21 12:27:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2093 states have (on average 1.3239369326325847) internal successors, (2771), 2147 states have internal predecessors, (2771), 605 states have call successors, (605), 189 states have call predecessors, (605), 190 states have return successors, (630), 604 states have call predecessors, (630), 602 states have call successors, (630) [2022-07-21 12:27:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4006 transitions. [2022-07-21 12:27:36,798 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4006 transitions. Word has length 153 [2022-07-21 12:27:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:27:36,799 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4006 transitions. [2022-07-21 12:27:36,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2022-07-21 12:27:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4006 transitions. [2022-07-21 12:27:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-21 12:27:36,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:27:36,805 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:27:36,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 12:27:37,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:27:37,020 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:27:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:27:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash -604240790, now seen corresponding path program 1 times [2022-07-21 12:27:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:27:37,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464649650] [2022-07-21 12:27:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:27:37,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:27:37,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:27:37,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:27:37,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 12:27:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:27:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 3771 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 12:27:40,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:27:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 67 proven. 55 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 12:27:44,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 12:27:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 57 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 12:27:52,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:27:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464649650] [2022-07-21 12:27:52,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464649650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 12:27:52,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 12:27:52,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-21 12:27:52,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094249510] [2022-07-21 12:27:52,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 12:27:52,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 12:27:52,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:27:52,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 12:27:52,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-21 12:27:52,512 INFO L87 Difference]: Start difference. First operand 2889 states and 4006 transitions. Second operand has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-21 12:28:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:28:11,545 INFO L93 Difference]: Finished difference Result 5846 states and 8145 transitions. [2022-07-21 12:28:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 12:28:11,548 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 169 [2022-07-21 12:28:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:28:11,560 INFO L225 Difference]: With dead ends: 5846 [2022-07-21 12:28:11,561 INFO L226 Difference]: Without dead ends: 2971 [2022-07-21 12:28:11,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=635, Invalid=1171, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 12:28:11,570 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 158 mSDsluCounter, 14805 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 15796 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-21 12:28:11,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 15796 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-07-21 12:28:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2022-07-21 12:28:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2937. [2022-07-21 12:28:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2141 states have (on average 1.3166744511910322) internal successors, (2819), 2195 states have internal predecessors, (2819), 605 states have call successors, (605), 189 states have call predecessors, (605), 190 states have return successors, (630), 604 states have call predecessors, (630), 602 states have call successors, (630) [2022-07-21 12:28:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 4054 transitions. [2022-07-21 12:28:11,694 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 4054 transitions. Word has length 169 [2022-07-21 12:28:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:28:11,695 INFO L495 AbstractCegarLoop]: Abstraction has 2937 states and 4054 transitions. [2022-07-21 12:28:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-21 12:28:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 4054 transitions. [2022-07-21 12:28:11,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-21 12:28:11,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:28:11,701 INFO L195 NwaCegarLoop]: trace histogram [26, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:28:11,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-21 12:28:11,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:28:11,918 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:28:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:28:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash 731148714, now seen corresponding path program 2 times [2022-07-21 12:28:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:28:11,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894823201] [2022-07-21 12:28:11,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 12:28:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:28:11,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:28:11,924 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:28:11,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 12:28:14,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 12:28:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 12:28:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 12:28:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:28:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2022-07-21 12:28:14,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 12:28:14,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:28:14,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894823201] [2022-07-21 12:28:14,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894823201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 12:28:14,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 12:28:14,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 12:28:14,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088297994] [2022-07-21 12:28:14,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 12:28:14,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 12:28:14,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:28:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 12:28:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:28:14,775 INFO L87 Difference]: Start difference. First operand 2937 states and 4054 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-07-21 12:28:16,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 12:28:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 12:28:17,208 INFO L93 Difference]: Finished difference Result 5846 states and 8078 transitions. [2022-07-21 12:28:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 12:28:17,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 181 [2022-07-21 12:28:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 12:28:17,218 INFO L225 Difference]: With dead ends: 5846 [2022-07-21 12:28:17,218 INFO L226 Difference]: Without dead ends: 2939 [2022-07-21 12:28:17,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 12:28:17,229 INFO L413 NwaCegarLoop]: 1901 mSDtfsCounter, 960 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 2867 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-21 12:28:17,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 2867 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-21 12:28:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-07-21 12:28:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2934. [2022-07-21 12:28:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2139 states have (on average 1.3151005142589995) internal successors, (2813), 2193 states have internal predecessors, (2813), 604 states have call successors, (604), 188 states have call predecessors, (604), 190 states have return successors, (628), 604 states have call predecessors, (628), 600 states have call successors, (628) [2022-07-21 12:28:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4045 transitions. [2022-07-21 12:28:17,348 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4045 transitions. Word has length 181 [2022-07-21 12:28:17,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 12:28:17,348 INFO L495 AbstractCegarLoop]: Abstraction has 2934 states and 4045 transitions. [2022-07-21 12:28:17,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2022-07-21 12:28:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4045 transitions. [2022-07-21 12:28:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-21 12:28:17,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 12:28:17,355 INFO L195 NwaCegarLoop]: trace histogram [26, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 12:28:17,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 12:28:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 12:28:17,576 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 12:28:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 12:28:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1008632914, now seen corresponding path program 1 times [2022-07-21 12:28:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 12:28:17,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608760564] [2022-07-21 12:28:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 12:28:17,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 12:28:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 12:28:17,584 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 12:28:17,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 12:28:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 12:28:21,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 3911 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 12:28:21,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 12:28:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 127 proven. 253 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 12:28:35,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 12:29:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 117 proven. 253 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 12:29:06,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 12:29:06,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608760564] [2022-07-21 12:29:06,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608760564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 12:29:06,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 12:29:06,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-21 12:29:06,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720524244] [2022-07-21 12:29:06,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 12:29:06,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 12:29:06,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 12:29:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 12:29:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 12:29:06,901 INFO L87 Difference]: Start difference. First operand 2934 states and 4045 transitions. Second operand has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28)